Import Mesa 6.5.1 (MesaLib, MesaDemos, MesaGLUT).

32 files changed, 10748 insertions, 0 deletions

diff --git a/progs/xdemos/Makefile b/progs/xdemos/Makefile
new file mode 100644
index 00000000000..4ca8b107a24
--- /dev/null
+++ b/progs/xdemos/Makefile
@@ -0,0 +1,83 @@
+# progs/xdemos/Makefile
+
+TOP = ../..
+include $(TOP)/configs/current
+
+
+INCDIR = $(TOP)/include
+
+LIB_DEP = $(TOP)/$(LIB_DIR)/$(GL_LIB_NAME) $(TOP)/$(LIB_DIR)/$(GLU_LIB_NAME)
+
+PROGS = glthreads \
+	glxdemo \
+	glxgears \
+	glxgears_fbconfig \
+	glxcontexts \
+	glxheads \
+	glxinfo \
+	glxpixmap \
+	glxpbdemo \
+	glxswapcontrol \
+	manywin \
+	offset \
+	overlay \
+	pbinfo \
+	pbdemo \
+	wincopy \
+	xdemo \
+	xfont \
+	xrotfontdemo \
+	yuvrect_client
+
+
+
+##### RULES #####
+
+.SUFFIXES:
+.SUFFIXES: .c
+
+.c: $(LIB_DEP)
+	$(CC) -I$(INCDIR) $(CFLAGS) $< $(APP_LIB_DEPS) -o $@
+
+
+##### TARGETS #####
+
+default: $(PROGS)
+
+
+clean:
+	-rm -f $(PROGS)
+	-rm -f *.o *~
+
+
+# special cases
+pbinfo: pbinfo.o pbutil.o
+	$(CC) -I$(INCDIR) $(CFLAGS) pbinfo.o pbutil.o $(APP_LIB_DEPS) -o $@
+
+pbdemo: pbdemo.o pbutil.o
+	$(CC) -I$(INCDIR) $(CFLAGS) pbdemo.o pbutil.o $(APP_LIB_DEPS) -o $@
+
+pbinfo.o: pbinfo.c pbutil.h
+	$(CC) -c -I. -I$(INCDIR) $(CFLAGS) pbinfo.c
+
+pbdemo.o: pbdemo.c pbutil.h
+	$(CC) -c -I. -I$(INCDIR) $(CFLAGS) pbdemo.c
+
+pbutil.o: pbutil.c pbutil.h
+	$(CC) -c -I. -I$(INCDIR) $(CFLAGS) pbutil.c
+
+glxgears_fbconfig: glxgears_fbconfig.o pbutil.o
+	$(CC) -I$(INCDIR) $(CFLAGS) glxgears_fbconfig.o pbutil.o $(APP_LIB_DEPS) -o $@
+
+glxgears_fbconfig.o: glxgears_fbconfig.c pbutil.h
+	$(CC) -I$(INCDIR) $(CFLAGS) -c -I. $(CFLAGS) glxgears_fbconfig.c
+
+xrotfontdemo: xrotfontdemo.o xuserotfont.o
+	$(CC) -I$(INCDIR) $(CFLAGS) xrotfontdemo.o xuserotfont.o $(APP_LIB_DEPS) -o $@
+
+xuserotfont.o: xuserotfont.c xuserotfont.h
+	$(CC) -c -I. -I$(INCDIR) $(CFLAGS) xuserotfont.c
+
+xrotfontdemo.o: xrotfontdemo.c xuserotfont.h
+	$(CC) -c -I. -I$(INCDIR) $(CFLAGS) xrotfontdemo.c
+
diff --git a/progs/xdemos/descrip.mms b/progs/xdemos/descrip.mms
new file mode 100644
index 00000000000..aa74daff599
--- /dev/null
+++ b/progs/xdemos/descrip.mms
@@ -0,0 +1,83 @@
+# Makefile for GLUT-based demo programs for VMS
+# contributed by Jouk Jansen  [email protected]
+
+
+.first
+	define gl [--.include.gl]
+
+.include [--]mms-config.
+
+##### MACROS #####
+
+INCDIR = ([--.include],[-.util])
+CFLAGS = /include=$(INCDIR)/prefix=all/name=(as_is,short)/nowarn/float=ieee/ieee=denorm
+
+.ifdef SHARE
+GL_LIBS = $(XLIBS)
+.else
+GL_LIBS = [--.lib]libGLUT/l,libMesaGLU/l,libMesaGL/l,$(XLIBS)
+.endif
+
+LIB_DEP = [--.lib]$(GL_LIB) [--.lib]$(GLU_LIB) [--.lib]$(GLUT_LIB)
+
+PROGS =glthreads.exe,\
+	glxdemo.exe,\
+	glxgears.exe,\
+	glxheads.exe,\
+	glxinfo.exe,\
+	glxpixmap.exe,\
+	manywin.exe,\
+	offset.exe,\
+	pbinfo.exe,\
+	pbdemo.exe,\
+	wincopy.exe,\
+	xdemo.exe,\
+	xfont.exe
+
+##### RULES #####
+.obj.exe :
+	cxxlink $(MMS$TARGET_NAME),$(GL_LIBS)
+
+##### TARGETS #####
+default :
+	$(MMS)$(MMSQUALIFIERS) $(PROGS)
+
+clean :
+	delete *.obj;*
+
+realclean :
+	delete $(PROGS)
+	delete *.obj;*
+
+
+glthreads.exe : glthreads.obj $(LIB_DEP) 
+glxdemo.exe : glxdemo.obj $(LIB_DEP)
+glxgears.exe : glxgears.obj $(LIB_DEP)
+glxheads.exe : glxheads.obj $(LIB_DEP)
+glxinfo.exe : glxinfo.obj $(LIB_DEP)
+glxpixmap.exe : glxpixmap.obj $(LIB_DEP)
+manywin.exe : manywin.obj $(LIB_DEP)
+offset.exe : offset.obj $(LIB_DEP)
+pbinfo.exe : pbinfo.obj pbutil.obj $(LIB_DEP)
+	cxxlink pbinfo.obj,pbutil.obj,$(GL_LIBS)
+pbdemo.exe : pbdemo.obj pbutil.obj $(LIB_DEP)
+	cxxlink pbdemo.obj,pbutil.obj,$(GL_LIBS)
+wincopy.exe : wincopy.obj $(LIB_DEP)
+xdemo.exe : xdemo.obj $(LIB_DEP)
+xfont.exe :xfont.obj $(LIB_DEP)
+
+
+glthreads.obj : glthreads.c 
+glxdemo.obj : glxdemo.c
+glxgears.obj : glxgears.c
+glxheads.obj : glxheads.c
+glxinfo.obj : glxinfo.c
+glxpixmap.obj : glxpixmap.c
+manywin.obj : manywin.c
+offset.obj : offset.c
+pbinfo.obj : pbinfo.c
+pbutil.obj : pbutil.c
+pbdemo.obj : pbdemo.c
+wincopy.obj : wincopy.c
+xdemo.obj : xdemo.c
+xfont.obj :xfont.c
diff --git a/progs/xdemos/glthreads.c b/progs/xdemos/glthreads.c
new file mode 100644
index 00000000000..83413383dd4
--- /dev/null
+++ b/progs/xdemos/glthreads.c
@@ -0,0 +1,544 @@
+/*
+ * Copyright (C) 2000  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * This program tests GLX thread safety.
+ * Command line options:
+ *  -p                       Open a display connection for each thread
+ *  -n <num threads>         Number of threads to create (default is 2)
+ *  -display <display name>  Specify X display (default is :0.0)
+ *
+ * Brian Paul  20 July 2000
+ */
+
+
+#if defined(PTHREADS)   /* defined by Mesa on Linux and other platforms */
+
+#include <assert.h>
+#include <GL/gl.h>
+#include <GL/glx.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <pthread.h>
+
+
+/*
+ * Each window/thread/context:
+ */
+struct winthread {
+   Display *Dpy;
+   int Index;
+   pthread_t Thread;
+   Window Win;
+   GLXContext Context;
+   float Angle;
+   int WinWidth, WinHeight;
+   GLboolean NewSize;
+};
+
+
+#define MAX_WINTHREADS 100
+static struct winthread WinThreads[MAX_WINTHREADS];
+static int NumWinThreads = 0;
+static volatile GLboolean ExitFlag = GL_FALSE;
+
+static GLboolean MultiDisplays = 0;
+static GLboolean Locking = 0;
+
+static pthread_mutex_t Mutex;
+
+
+static void
+Error(const char *msg)
+{
+   fprintf(stderr, "Error: %s\n", msg);
+   exit(1);
+}
+
+
+/* draw a colored cube */
+static void
+draw_object(void)
+{
+   glPushMatrix();
+   glScalef(0.75, 0.75, 0.75);
+
+   glColor3f(1, 0, 0);
+   glBegin(GL_POLYGON);
+   glVertex3f(1, -1, -1);
+   glVertex3f(1,  1, -1);
+   glVertex3f(1,  1,  1);
+   glVertex3f(1, -1,  1);
+   glEnd();
+
+   glColor3f(0, 1, 1);
+   glBegin(GL_POLYGON);
+   glVertex3f(-1, -1, -1);
+   glVertex3f(-1,  1, -1);
+   glVertex3f(-1,  1,  1);
+   glVertex3f(-1, -1,  1);
+   glEnd();
+
+   glColor3f(0, 1, 0);
+   glBegin(GL_POLYGON);
+   glVertex3f(-1, 1, -1);
+   glVertex3f( 1, 1, -1);
+   glVertex3f( 1, 1,  1);
+   glVertex3f(-1, 1,  1);
+   glEnd();
+
+   glColor3f(1, 0, 1);
+   glBegin(GL_POLYGON);
+   glVertex3f(-1, -1, -1);
+   glVertex3f( 1, -1, -1);
+   glVertex3f( 1, -1,  1);
+   glVertex3f(-1, -1,  1);
+   glEnd();
+
+   glColor3f(0, 0, 1);
+   glBegin(GL_POLYGON);
+   glVertex3f(-1, -1, 1);
+   glVertex3f( 1, -1, 1);
+   glVertex3f( 1,  1, 1);
+   glVertex3f(-1,  1, 1);
+   glEnd();
+
+   glColor3f(1, 1, 0);
+   glBegin(GL_POLYGON);
+   glVertex3f(-1, -1, -1);
+   glVertex3f( 1, -1, -1);
+   glVertex3f( 1,  1, -1);
+   glVertex3f(-1,  1, -1);
+   glEnd();
+   glPopMatrix();
+}
+
+
+/* signal resize of given window */
+static void
+resize(struct winthread *wt, int w, int h)
+{
+   wt->NewSize = GL_TRUE;
+   wt->WinWidth = w;
+   wt->WinHeight = h;
+}
+
+
+/*
+ * We have an instance of this for each thread.
+ */
+static void
+draw_loop(struct winthread *wt)
+{
+   GLboolean firstIter = GL_TRUE;
+
+   while (!ExitFlag) {
+
+      if (Locking)
+         pthread_mutex_lock(&Mutex);
+
+      glXMakeCurrent(wt->Dpy, wt->Win, wt->Context);
+      if (firstIter) {
+         printf("glthreads: %d: GL_RENDERER = %s\n", wt->Index,
+                (char *) glGetString(GL_RENDERER));
+         firstIter = GL_FALSE;
+      }
+
+      if (Locking)
+         pthread_mutex_unlock(&Mutex);
+
+      glEnable(GL_DEPTH_TEST);
+
+      if (wt->NewSize) {
+         GLfloat w = (float) wt->WinWidth / (float) wt->WinHeight;
+         glViewport(0, 0, wt->WinWidth, wt->WinHeight);
+         glMatrixMode(GL_PROJECTION);
+         glLoadIdentity();
+         glFrustum(-w, w, -1.0, 1.0, 1.5, 10);
+         glMatrixMode(GL_MODELVIEW);
+         glLoadIdentity();
+         glTranslatef(0, 0, -2.5);
+         wt->NewSize = GL_FALSE;
+      }
+
+      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+      glPushMatrix();
+         glRotatef(wt->Angle, 0, 0, 1);
+         glRotatef(wt->Angle, 1, 0, 0);
+         glScalef(0.7, 0.7, 0.7);
+         draw_object();
+      glPopMatrix();
+
+      if (Locking)
+         pthread_mutex_lock(&Mutex);
+
+      glXSwapBuffers(wt->Dpy, wt->Win);
+
+      if (Locking)
+         pthread_mutex_unlock(&Mutex);
+
+      usleep(5000);
+      wt->Angle += 1.0;
+   }
+}
+
+
+/*
+ * The main process thread runs this loop.
+ * Single display connection for all threads.
+ */
+static void
+event_loop(Display *dpy)
+{
+   XEvent event;
+   int i;
+
+   assert(!MultiDisplays);
+
+   while (!ExitFlag) {
+
+      if (Locking) {
+         while (1) {
+            int k;
+            pthread_mutex_lock(&Mutex);
+            k = XPending(dpy);
+            if (k) {
+               XNextEvent(dpy, &event);
+               pthread_mutex_unlock(&Mutex);
+               break;
+            }
+            pthread_mutex_unlock(&Mutex);
+            usleep(5000);
+         }
+      }
+      else {
+         XNextEvent(dpy, &event);
+      }
+
+      switch (event.type) {
+         case ConfigureNotify:
+            /* Find winthread for this event's window */
+            for (i = 0; i < NumWinThreads; i++) {
+               struct winthread *wt = &WinThreads[i];
+               if (event.xconfigure.window == wt->Win) {
+                  resize(wt, event.xconfigure.width,
+                         event.xconfigure.height);
+                  break;
+               }
+            }
+            break;
+         case KeyPress:
+            /* tell all threads to exit */
+            ExitFlag = GL_TRUE;
+            /*printf("exit draw_loop %d\n", wt->Index);*/
+            return;
+         default:
+            /*no-op*/ ;
+      }
+   }
+}
+
+
+/*
+ * Separate display connection for each thread.
+ */
+static void
+event_loop_multi(void)
+{
+   XEvent event;
+   int w = 0;
+
+   assert(MultiDisplays);
+
+   while (!ExitFlag) {
+      struct winthread *wt = &WinThreads[w];
+      if (XPending(wt->Dpy)) {
+         XNextEvent(wt->Dpy, &event);
+         switch (event.type) {
+         case ConfigureNotify:
+            resize(wt, event.xconfigure.width, event.xconfigure.height);
+            break;
+         case KeyPress:
+            /* tell all threads to exit */
+            ExitFlag = GL_TRUE;
+            /*printf("exit draw_loop %d\n", wt->Index);*/
+            return;
+         default:
+            /*no-op*/ ;
+         }
+      }
+      w = (w + 1) % NumWinThreads;
+      usleep(5000);
+   }
+}
+
+
+
+/*
+ * we'll call this once for each thread, before the threads are created.
+ */
+static void
+create_window(struct winthread *wt)
+{
+   Window win;
+   GLXContext ctx;
+   int attrib[] = { GLX_RGBA,
+		    GLX_RED_SIZE, 1,
+		    GLX_GREEN_SIZE, 1,
+		    GLX_BLUE_SIZE, 1,
+                    GLX_DEPTH_SIZE, 1,
+		    GLX_DOUBLEBUFFER,
+		    None };
+   int scrnum;
+   XSetWindowAttributes attr;
+   unsigned long mask;
+   Window root;
+   XVisualInfo *visinfo;
+   int width = 80, height = 80;
+   int xpos = (wt->Index % 10) * 90;
+   int ypos = (wt->Index / 10) * 100;
+
+   scrnum = DefaultScreen(wt->Dpy);
+   root = RootWindow(wt->Dpy, scrnum);
+
+   visinfo = glXChooseVisual(wt->Dpy, scrnum, attrib);
+   if (!visinfo) {
+      Error("Unable to find RGB, Z, double-buffered visual");
+   }
+
+   /* window attributes */
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   attr.colormap = XCreateColormap(wt->Dpy, root, visinfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+
+   win = XCreateWindow(wt->Dpy, root, xpos, ypos, width, height,
+		        0, visinfo->depth, InputOutput,
+		        visinfo->visual, mask, &attr);
+   if (!win) {
+      Error("Couldn't create window");
+   }
+
+   {
+      XSizeHints sizehints;
+      sizehints.x = xpos;
+      sizehints.y = ypos;
+      sizehints.width  = width;
+      sizehints.height = height;
+      sizehints.flags = USSize | USPosition;
+      XSetNormalHints(wt->Dpy, win, &sizehints);
+      XSetStandardProperties(wt->Dpy, win, "glthreads", "glthreads",
+                              None, (char **)NULL, 0, &sizehints);
+   }
+
+
+   ctx = glXCreateContext(wt->Dpy, visinfo, NULL, True);
+   if (!ctx) {
+      Error("Couldn't create GLX context");
+   }
+
+   XMapWindow(wt->Dpy, win);
+   XSync(wt->Dpy, 0);
+
+   /* save the info for this window/context */
+   wt->Win = win;
+   wt->Context = ctx;
+   wt->Angle = 0.0;
+   wt->WinWidth = width;
+   wt->WinHeight = height;
+   wt->NewSize = GL_TRUE;
+}
+
+
+/*
+ * Called by pthread_create()
+ */
+static void *
+thread_function(void *p)
+{
+   struct winthread *wt = (struct winthread *) p;
+   draw_loop(wt);
+   return NULL;
+}
+
+
+/*
+ * called before exit to wait for all threads to finish
+ */
+static void
+clean_up(void)
+{
+   int i;
+
+   /* wait for threads to finish */
+   for (i = 0; i < NumWinThreads; i++) {
+      pthread_join(WinThreads[i].Thread, NULL);
+   }
+
+   for (i = 0; i < NumWinThreads; i++) {
+      glXDestroyContext(WinThreads[i].Dpy, WinThreads[i].Context);
+      XDestroyWindow(WinThreads[i].Dpy, WinThreads[i].Win);
+   }
+}
+
+
+
+int
+main(int argc, char *argv[])
+{
+   char *displayName = ":0.0";
+   int numThreads = 2;
+   Display *dpy = NULL;
+   int i;
+   Status threadStat;
+
+   if (argc == 1) {
+      printf("glthreads: test of GL thread safety (any key = exit)\n");
+      printf("Usage:\n");
+      printf("  glthreads [-display dpyName] [-n numthreads]\n");
+   }
+   else {
+      int i;
+      for (i = 1; i < argc; i++) {
+         if (strcmp(argv[i], "-display") == 0 && i + 1 < argc) {
+            displayName = argv[i + 1];
+            i++;
+         }
+         else if (strcmp(argv[i], "-p") == 0) {
+            MultiDisplays = 1;
+         }
+         else if (strcmp(argv[i], "-l") == 0) {
+            Locking = 1;
+         }
+         else if (strcmp(argv[i], "-n") == 0 && i + 1 < argc) {
+            numThreads = atoi(argv[i + 1]);
+            if (numThreads < 1)
+               numThreads = 1;
+            else if (numThreads > MAX_WINTHREADS)
+               numThreads = MAX_WINTHREADS;
+            i++;
+         }
+         else {
+            fprintf(stderr, "glthreads: unexpected flag: %s\n", argv[i]);
+         }
+      }
+   }
+   
+   if (Locking)
+      printf("glthreads: Using explict locks around Xlib calls.\n");
+   else
+      printf("glthreads: No explict locking.\n");
+
+   if (MultiDisplays)
+      printf("glthreads: Per-thread display connections.\n");
+   else
+      printf("glthreads: Single display connection.\n");
+
+   /*
+    * VERY IMPORTANT: call XInitThreads() before any other Xlib functions.
+    */
+   if (!MultiDisplays) {
+      if (!Locking) {
+         threadStat = XInitThreads();
+      if (threadStat) {
+         printf("XInitThreads() returned %d (success)\n", (int) threadStat);
+      }
+      else {
+         printf("XInitThreads() returned 0 (failure- this program may fail)\n");
+      }
+      }
+
+      dpy = XOpenDisplay(displayName);
+      if (!dpy) {
+         fprintf(stderr, "Unable to open display %s\n", displayName);
+         return -1;
+      }
+   }
+
+   if (Locking) {
+      pthread_mutex_init(&Mutex, NULL);
+   }
+
+   printf("glthreads: creating windows\n");
+
+   NumWinThreads = numThreads;
+
+   /* Create the GLX windows and contexts */
+   for (i = 0; i < numThreads; i++) {
+      if (MultiDisplays) {
+         WinThreads[i].Dpy = XOpenDisplay(displayName);
+         assert(WinThreads[i].Dpy);
+      }
+      else {
+         WinThreads[i].Dpy = dpy;
+      }
+      WinThreads[i].Index = i;
+      create_window(&WinThreads[i]);
+   }
+
+   printf("glthreads: creating threads\n");
+
+   /* Create the threads */
+   for (i = 0; i < numThreads; i++) {
+      pthread_create(&WinThreads[i].Thread, NULL, thread_function,
+                     (void*) &WinThreads[i]);
+      printf("glthreads: Created thread %u\n", (unsigned int) WinThreads[i].Thread);
+   }
+
+   if (MultiDisplays)
+      event_loop_multi();
+   else
+      event_loop(dpy);
+
+   clean_up();
+
+   if (MultiDisplays) {
+      for (i = 0; i < numThreads; i++) {
+         XCloseDisplay(WinThreads[i].Dpy);
+      }
+   }
+   else {
+      XCloseDisplay(dpy);
+   }
+
+   return 0;
+}
+
+
+#else /* PTHREADS */
+
+
+#include <stdio.h>
+
+int
+main(int argc, char *argv[])
+{
+   printf("Sorry, this program wasn't compiled with PTHREADS defined.\n");
+   return 0;
+}
+
+
+#endif /* PTHREADS */
diff --git a/progs/xdemos/glxcontexts.c b/progs/xdemos/glxcontexts.c
new file mode 100644
index 00000000000..fbc296ef625
--- /dev/null
+++ b/progs/xdemos/glxcontexts.c
@@ -0,0 +1,609 @@
+/*
+ * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/*
+ * This is a port of the infamous "gears" demo to straight GLX (i.e. no GLUT)
+ * Port by Brian Paul  23 March 2001
+ *
+ * Command line options:
+ *    -info      print GL implementation information
+ *    -stereo    use stereo enabled GLX visual
+ *
+ */
+
+
+#include <math.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <X11/Xlib.h>
+#include <X11/keysym.h>
+#include <GL/gl.h>
+#include <GL/glx.h>
+
+
+#define BENCHMARK
+
+#ifdef BENCHMARK
+
+/* XXX this probably isn't very portable */
+
+#include <sys/time.h>
+#include <unistd.h>
+
+/* return current time (in seconds) */
+static double
+current_time(void)
+{
+   struct timeval tv;
+#ifdef __VMS
+   (void) gettimeofday(&tv, NULL );
+#else
+   struct timezone tz;
+   (void) gettimeofday(&tv, &tz);
+#endif
+   return (double) tv.tv_sec + tv.tv_usec / 1000000.0;
+}
+
+#else /*BENCHMARK*/
+
+/* dummy */
+static double
+current_time(void)
+{
+   /* update this function for other platforms! */
+   static double t = 0.0;
+   static int warn = 1;
+   if (warn) {
+      fprintf(stderr, "Warning: current_time() not implemented!!\n");
+      warn = 0;
+   }
+   return t += 1.0;
+}
+
+#endif /*BENCHMARK*/
+
+
+
+#ifndef M_PI
+#define M_PI 3.14159265
+#endif
+
+
+static GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0;
+static GLint gear1, gear2, gear3;
+static GLfloat angle = 0.0;
+
+static GLboolean fullscreen = GL_FALSE;	/* Create a single fullscreen window */
+static GLboolean stereo = GL_FALSE;	/* Enable stereo.  */
+static GLfloat eyesep = 5.0;		/* Eye separation. */
+static GLfloat fix_point = 40.0;	/* Fixation point distance.  */
+static GLfloat left, right, asp;	/* Stereo frustum params.  */
+
+   XVisualInfo *visinfo;
+
+
+/*
+ *
+ *  Draw a gear wheel.  You'll probably want to call this function when
+ *  building a display list since we do a lot of trig here.
+ * 
+ *  Input:  inner_radius - radius of hole at center
+ *          outer_radius - radius at center of teeth
+ *          width - width of gear
+ *          teeth - number of teeth
+ *          tooth_depth - depth of tooth
+ */
+static void
+gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
+     GLint teeth, GLfloat tooth_depth)
+{
+   GLint i;
+   GLfloat r0, r1, r2;
+   GLfloat angle, da;
+   GLfloat u, v, len;
+
+   r0 = inner_radius;
+   r1 = outer_radius - tooth_depth / 2.0;
+   r2 = outer_radius + tooth_depth / 2.0;
+
+   da = 2.0 * M_PI / teeth / 4.0;
+
+   glShadeModel(GL_FLAT);
+
+   glNormal3f(0.0, 0.0, 1.0);
+
+   /* draw front face */
+   glBegin(GL_QUAD_STRIP);
+   for (i = 0; i <= teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
+      if (i < teeth) {
+	 glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
+	 glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		    width * 0.5);
+      }
+   }
+   glEnd();
+
+   /* draw front sides of teeth */
+   glBegin(GL_QUADS);
+   da = 2.0 * M_PI / teeth / 4.0;
+   for (i = 0; i < teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
+      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
+      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
+		 width * 0.5);
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		 width * 0.5);
+   }
+   glEnd();
+
+   glNormal3f(0.0, 0.0, -1.0);
+
+   /* draw back face */
+   glBegin(GL_QUAD_STRIP);
+   for (i = 0; i <= teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
+      if (i < teeth) {
+	 glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		    -width * 0.5);
+	 glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
+      }
+   }
+   glEnd();
+
+   /* draw back sides of teeth */
+   glBegin(GL_QUADS);
+   da = 2.0 * M_PI / teeth / 4.0;
+   for (i = 0; i < teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		 -width * 0.5);
+      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
+		 -width * 0.5);
+      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
+   }
+   glEnd();
+
+   /* draw outward faces of teeth */
+   glBegin(GL_QUAD_STRIP);
+   for (i = 0; i < teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
+      u = r2 * cos(angle + da) - r1 * cos(angle);
+      v = r2 * sin(angle + da) - r1 * sin(angle);
+      len = sqrt(u * u + v * v);
+      u /= len;
+      v /= len;
+      glNormal3f(v, -u, 0.0);
+      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
+      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
+      glNormal3f(cos(angle), sin(angle), 0.0);
+      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
+		 width * 0.5);
+      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
+		 -width * 0.5);
+      u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da);
+      v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da);
+      glNormal3f(v, -u, 0.0);
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		 width * 0.5);
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		 -width * 0.5);
+      glNormal3f(cos(angle), sin(angle), 0.0);
+   }
+
+   glVertex3f(r1 * cos(0), r1 * sin(0), width * 0.5);
+   glVertex3f(r1 * cos(0), r1 * sin(0), -width * 0.5);
+
+   glEnd();
+
+   glShadeModel(GL_SMOOTH);
+
+   /* draw inside radius cylinder */
+   glBegin(GL_QUAD_STRIP);
+   for (i = 0; i <= teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+      glNormal3f(-cos(angle), -sin(angle), 0.0);
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
+   }
+   glEnd();
+}
+
+
+static void
+do_draw(void)
+{
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   glPushMatrix();
+   glRotatef(view_rotx, 1.0, 0.0, 0.0);
+   glRotatef(view_roty, 0.0, 1.0, 0.0);
+   glRotatef(view_rotz, 0.0, 0.0, 1.0);
+
+   glPushMatrix();
+   glTranslatef(-3.0, -2.0, 0.0);
+   glRotatef(angle, 0.0, 0.0, 1.0);
+   glCallList(gear1);
+   glPopMatrix();
+
+   glPushMatrix();
+   glTranslatef(3.1, -2.0, 0.0);
+   glRotatef(-2.0 * angle - 9.0, 0.0, 0.0, 1.0);
+   glCallList(gear2);
+   glPopMatrix();
+
+   glPushMatrix();
+   glTranslatef(-3.1, 4.2, 0.0);
+   glRotatef(-2.0 * angle - 25.0, 0.0, 0.0, 1.0);
+   glCallList(gear3);
+   glPopMatrix();
+
+   glPopMatrix();
+}
+
+
+
+/* new window size or exposure */
+static void
+reshape(int width, int height)
+{
+   glViewport(0, 0, (GLint) width, (GLint) height);
+
+   if (stereo) {
+      GLfloat w;
+
+      asp = (GLfloat) height / (GLfloat) width;
+      w = fix_point * (1.0 / 5.0);
+
+      left = -5.0 * ((w - 0.5 * eyesep) / fix_point);
+      right = 5.0 * ((w + 0.5 * eyesep) / fix_point);
+   } else {
+      GLfloat h = (GLfloat) height / (GLfloat) width;
+
+      glMatrixMode(GL_PROJECTION);
+      glLoadIdentity();
+      glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0);
+   }
+   
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef(0.0, 0.0, -40.0);
+}
+   
+
+
+static void
+init(void)
+{
+   static GLfloat pos[4] = { 5.0, 5.0, 10.0, 0.0 };
+   static GLfloat red[4] = { 0.8, 0.1, 0.0, 1.0 };
+   static GLfloat green[4] = { 0.0, 0.8, 0.2, 1.0 };
+   static GLfloat blue[4] = { 0.2, 0.2, 1.0, 1.0 };
+
+   glLightfv(GL_LIGHT0, GL_POSITION, pos);
+   glEnable(GL_CULL_FACE);
+   glEnable(GL_LIGHTING);
+   glEnable(GL_LIGHT0);
+   glEnable(GL_DEPTH_TEST);
+
+   /* make the gears */
+   gear1 = glGenLists(1);
+   glNewList(gear1, GL_COMPILE);
+   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
+   gear(1.0, 4.0, 1.0, 20, 0.7);
+   glEndList();
+
+   gear2 = glGenLists(1);
+   glNewList(gear2, GL_COMPILE);
+   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
+   gear(0.5, 2.0, 2.0, 10, 0.7);
+   glEndList();
+
+   gear3 = glGenLists(1);
+   glNewList(gear3, GL_COMPILE);
+   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
+   gear(1.3, 2.0, 0.5, 10, 0.7);
+   glEndList();
+
+   glEnable(GL_NORMALIZE);
+}
+
+
+static void
+draw( Display *dpy, Window win )
+{
+   GLXContext ctx;
+
+   ctx = glXCreateContext( dpy, visinfo, NULL, True );
+   if (!ctx) {
+      printf("Error: glXCreateContext failed\n");
+      exit(1);
+   }
+
+   glXMakeCurrent(dpy, win, ctx);
+
+   init();
+
+   if (stereo) {
+      /* First left eye.  */
+      glDrawBuffer(GL_BACK_LEFT);
+
+      glMatrixMode(GL_PROJECTION);
+      glLoadIdentity();
+      glFrustum(left, right, -asp, asp, 5.0, 60.0);
+
+      glMatrixMode(GL_MODELVIEW);
+
+      glPushMatrix();
+      glTranslated(+0.5 * eyesep, 0.0, 0.0);
+      do_draw();
+      glPopMatrix();
+
+      /* Then right eye.  */
+      glDrawBuffer(GL_BACK_RIGHT);
+
+      glMatrixMode(GL_PROJECTION);
+      glLoadIdentity();
+      glFrustum(-right, -left, -asp, asp, 5.0, 60.0);
+
+      glMatrixMode(GL_MODELVIEW);
+
+      glPushMatrix();
+      glTranslated(-0.5 * eyesep, 0.0, 0.0);
+      do_draw();
+      glPopMatrix();
+   } else
+      do_draw();
+
+   glXSwapBuffers(dpy, win);
+   glXDestroyContext(dpy, ctx);
+}
+
+
+/*
+ * Create an RGB, double-buffered window.
+ * Return the window and context handles.
+ */
+static void
+make_window( Display *dpy, const char *name,
+             int x, int y, int width, int height,
+             Window *winRet)
+{
+   int attribs[] = { GLX_RGBA,
+                     GLX_RED_SIZE, 1,
+                     GLX_GREEN_SIZE, 1,
+                     GLX_BLUE_SIZE, 1,
+                     GLX_DOUBLEBUFFER,
+                     GLX_DEPTH_SIZE, 1,
+                     None };
+   int stereoAttribs[] = { GLX_RGBA,
+                           GLX_RED_SIZE, 1,
+                           GLX_GREEN_SIZE, 1,
+                           GLX_BLUE_SIZE, 1,
+                           GLX_DOUBLEBUFFER,
+                           GLX_DEPTH_SIZE, 1,
+                           GLX_STEREO,
+                           None };
+   int scrnum;
+   XSetWindowAttributes attr;
+   unsigned long mask;
+   Window root;
+   Window win;
+
+   scrnum = DefaultScreen( dpy );
+   root = RootWindow( dpy, scrnum );
+
+   if (fullscreen) {
+      x = 0; y = 0;
+      width = DisplayWidth( dpy, scrnum );
+      height = DisplayHeight( dpy, scrnum );
+   }
+
+   if (stereo)
+      visinfo = glXChooseVisual( dpy, scrnum, stereoAttribs );
+   else
+      visinfo = glXChooseVisual( dpy, scrnum, attribs );
+   if (!visinfo) {
+      if (stereo) {
+         printf("Error: couldn't get an RGB, "
+                "Double-buffered, Stereo visual\n");
+      } else
+         printf("Error: couldn't get an RGB, Double-buffered visual\n");
+      exit(1);
+   }
+
+   /* window attributes */
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
+   attr.override_redirect = fullscreen;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask | CWOverrideRedirect;
+
+   win = XCreateWindow( dpy, root, x, y, width, height,
+		        0, visinfo->depth, InputOutput,
+		        visinfo->visual, mask, &attr );
+
+   /* set hints and properties */
+   {
+      XSizeHints sizehints;
+      sizehints.x = x;
+      sizehints.y = y;
+      sizehints.width  = width;
+      sizehints.height = height;
+      sizehints.flags = USSize | USPosition;
+      XSetNormalHints(dpy, win, &sizehints);
+      XSetStandardProperties(dpy, win, name, name,
+                              None, (char **)NULL, 0, &sizehints);
+   }
+
+   *winRet = win;
+}
+
+
+static void
+event_loop(Display *dpy)
+{
+   Window win;
+   make_window(dpy, "glxgears", 0, 0, 300, 300, &win);
+   XMapWindow(dpy, win);
+
+
+   while (1) {
+      while (XPending(dpy) > 0) {
+         XEvent event;
+         XNextEvent(dpy, &event);
+         switch (event.type) {
+	 case Expose:
+            /* we'll redraw below */
+	    break;
+	 case ConfigureNotify:
+	    reshape(event.xconfigure.width, event.xconfigure.height);
+	    break;
+         case KeyPress:
+	 {
+	    char buffer[10];
+	    int r, code;
+	    code = XLookupKeysym(&event.xkey, 0);
+	    if (code == XK_Left) {
+	       view_roty += 5.0;
+	    }
+	    else if (code == XK_Right) {
+	       view_roty -= 5.0;
+	    }
+	    else if (code == XK_Up) {
+	       view_rotx += 5.0;
+	    }
+	    else if (code == XK_Down) {
+	       view_rotx -= 5.0;
+	    }
+	    else {
+	       r = XLookupString(&event.xkey, buffer, sizeof(buffer),
+				 NULL, NULL);
+	       if (buffer[0] == 27) {
+		  /* escape */
+		  return;
+	       }
+	    }
+	 }
+         }
+      }
+
+      {
+         static int frames = 0;
+         static double tRot0 = -1.0, tRate0 = -1.0;
+         double dt, t = current_time();
+         if (tRot0 < 0.0)
+            tRot0 = t;
+         dt = t - tRot0;
+         tRot0 = t;
+
+         /* advance rotation for next frame */
+         angle += 70.0 * dt;  /* 70 degrees per second */
+         if (angle > 3600.0)
+	    angle -= 3600.0;
+
+         draw( dpy, win );
+
+         frames++;
+
+         if (tRate0 < 0.0)
+            tRate0 = t;
+
+         if (t - tRate0 >= 1.0) {
+            GLfloat seconds = t - tRate0;
+            GLfloat fps = frames / seconds;
+            printf("%d frames in %3.1f seconds = %6.3f FPS\n", frames, seconds,
+                   fps);
+            tRate0 = t;
+	    
+	    XDestroyWindow(dpy, win);
+	    make_window(dpy, "glxgears", (int)(fps * 100) % 100, (int)(fps * 100) % 100, 300, 300, &win);
+	    XMapWindow(dpy, win);
+
+            frames = 0;
+         }
+      }
+   }
+}
+
+
+
+int
+main(int argc, char *argv[])
+{
+   Display *dpy;
+   char *dpyName = NULL;
+   GLboolean printInfo = GL_FALSE;
+   int i;
+
+   for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "-display") == 0) {
+         dpyName = argv[i+1];
+         i++;
+      }
+      else if (strcmp(argv[i], "-info") == 0) {
+         printInfo = GL_TRUE;
+      }
+      else if (strcmp(argv[i], "-stereo") == 0) {
+         stereo = GL_TRUE;
+      }
+      else if (strcmp(argv[i], "-fullscreen") == 0) {
+         fullscreen = GL_TRUE;
+      }
+      else
+	 printf("Warrning: unknown parameter: %s\n", argv[i]);
+   }
+
+   dpy = XOpenDisplay(dpyName);
+   if (!dpy) {
+      printf("Error: couldn't open display %s\n",
+	     dpyName ? dpyName : getenv("DISPLAY"));
+      return -1;
+   }
+
+
+   if (printInfo) {
+      printf("GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
+      printf("GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
+      printf("GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
+      printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
+   }
+
+
+   event_loop(dpy);
+
+   XCloseDisplay(dpy);
+
+   return 0;
+}
diff --git a/progs/xdemos/glxdemo.c b/progs/xdemos/glxdemo.c
new file mode 100644
index 00000000000..37df64ebee8
--- /dev/null
+++ b/progs/xdemos/glxdemo.c
@@ -0,0 +1,127 @@
+
+
+/*
+ * A demonstration of using the GLX functions.  This program is in the
+ * public domain.
+ *
+ * Brian Paul
+ */
+
+#include <GL/gl.h>
+#include <GL/glx.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+
+
+static void redraw( Display *dpy, Window w )
+{
+   printf("Redraw event\n");
+
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   glColor3f( 1.0, 1.0, 0.0 );
+   glRectf( -0.8, -0.8, 0.8, 0.8 );
+
+   glXSwapBuffers( dpy, w );
+}
+
+
+
+static void resize( unsigned int width, unsigned int height )
+{
+   printf("Resize event\n");
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho( -1.0, 1.0, -1.0, 1.0, -1.0, 1.0 );
+}
+
+
+
+static Window make_rgb_db_window( Display *dpy,
+				  unsigned int width, unsigned int height )
+{
+   int attrib[] = { GLX_RGBA,
+		    GLX_RED_SIZE, 1,
+		    GLX_GREEN_SIZE, 1,
+		    GLX_BLUE_SIZE, 1,
+		    GLX_DOUBLEBUFFER,
+		    None };
+   int scrnum;
+   XSetWindowAttributes attr;
+   unsigned long mask;
+   Window root;
+   Window win;
+   GLXContext ctx;
+   XVisualInfo *visinfo;
+
+   scrnum = DefaultScreen( dpy );
+   root = RootWindow( dpy, scrnum );
+
+   visinfo = glXChooseVisual( dpy, scrnum, attrib );
+   if (!visinfo) {
+      printf("Error: couldn't get an RGB, Double-buffered visual\n");
+      exit(1);
+   }
+
+   /* window attributes */
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+
+   win = XCreateWindow( dpy, root, 0, 0, width, height,
+		        0, visinfo->depth, InputOutput,
+		        visinfo->visual, mask, &attr );
+
+   ctx = glXCreateContext( dpy, visinfo, NULL, True );
+   if (!ctx) {
+      printf("Error: glXCreateContext failed\n");
+      exit(1);
+   }
+
+   glXMakeCurrent( dpy, win, ctx );
+
+   return win;
+}
+
+
+static void event_loop( Display *dpy )
+{
+   XEvent event;
+
+   while (1) {
+      XNextEvent( dpy, &event );
+
+      switch (event.type) {
+	 case Expose:
+	    redraw( dpy, event.xany.window );
+	    break;
+	 case ConfigureNotify:
+	    resize( event.xconfigure.width, event.xconfigure.height );
+	    break;
+      }
+   }
+}
+
+
+
+int main( int argc, char *argv[] )
+{
+   Display *dpy;
+   Window win;
+
+   dpy = XOpenDisplay(NULL);
+
+   win = make_rgb_db_window( dpy, 300, 300 );
+
+   glShadeModel( GL_FLAT );
+   glClearColor( 0.5, 0.5, 0.5, 1.0 );
+
+   XMapWindow( dpy, win );
+
+   event_loop( dpy );
+   return 0;
+}
diff --git a/progs/xdemos/glxgears.c b/progs/xdemos/glxgears.c
new file mode 100644
index 00000000000..75d63e51a2e
--- /dev/null
+++ b/progs/xdemos/glxgears.c
@@ -0,0 +1,621 @@
+/*
+ * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/*
+ * This is a port of the infamous "gears" demo to straight GLX (i.e. no GLUT)
+ * Port by Brian Paul  23 March 2001
+ *
+ * Command line options:
+ *    -info      print GL implementation information
+ *    -stereo    use stereo enabled GLX visual
+ *
+ */
+
+
+#include <math.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <X11/Xlib.h>
+#include <X11/keysym.h>
+#include <GL/gl.h>
+#include <GL/glx.h>
+
+
+#define BENCHMARK
+
+#ifdef BENCHMARK
+
+/* XXX this probably isn't very portable */
+
+#include <sys/time.h>
+#include <unistd.h>
+
+/* return current time (in seconds) */
+static double
+current_time(void)
+{
+   struct timeval tv;
+#ifdef __VMS
+   (void) gettimeofday(&tv, NULL );
+#else
+   struct timezone tz;
+   (void) gettimeofday(&tv, &tz);
+#endif
+   return (double) tv.tv_sec + tv.tv_usec / 1000000.0;
+}
+
+#else /*BENCHMARK*/
+
+/* dummy */
+static double
+current_time(void)
+{
+   /* update this function for other platforms! */
+   static double t = 0.0;
+   static int warn = 1;
+   if (warn) {
+      fprintf(stderr, "Warning: current_time() not implemented!!\n");
+      warn = 0;
+   }
+   return t += 1.0;
+}
+
+#endif /*BENCHMARK*/
+
+
+
+#ifndef M_PI
+#define M_PI 3.14159265
+#endif
+
+
+static GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0;
+static GLint gear1, gear2, gear3;
+static GLfloat angle = 0.0;
+
+static GLboolean fullscreen = GL_FALSE;	/* Create a single fullscreen window */
+static GLboolean stereo = GL_FALSE;	/* Enable stereo.  */
+static GLfloat eyesep = 5.0;		/* Eye separation. */
+static GLfloat fix_point = 40.0;	/* Fixation point distance.  */
+static GLfloat left, right, asp;	/* Stereo frustum params.  */
+
+
+/*
+ *
+ *  Draw a gear wheel.  You'll probably want to call this function when
+ *  building a display list since we do a lot of trig here.
+ * 
+ *  Input:  inner_radius - radius of hole at center
+ *          outer_radius - radius at center of teeth
+ *          width - width of gear
+ *          teeth - number of teeth
+ *          tooth_depth - depth of tooth
+ */
+static void
+gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
+     GLint teeth, GLfloat tooth_depth)
+{
+   GLint i;
+   GLfloat r0, r1, r2;
+   GLfloat angle, da;
+   GLfloat u, v, len;
+
+   r0 = inner_radius;
+   r1 = outer_radius - tooth_depth / 2.0;
+   r2 = outer_radius + tooth_depth / 2.0;
+
+   da = 2.0 * M_PI / teeth / 4.0;
+
+   glShadeModel(GL_FLAT);
+
+   glNormal3f(0.0, 0.0, 1.0);
+
+   /* draw front face */
+   glBegin(GL_QUAD_STRIP);
+   for (i = 0; i <= teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
+      if (i < teeth) {
+	 glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
+	 glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		    width * 0.5);
+      }
+   }
+   glEnd();
+
+   /* draw front sides of teeth */
+   glBegin(GL_QUADS);
+   da = 2.0 * M_PI / teeth / 4.0;
+   for (i = 0; i < teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
+      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
+      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
+		 width * 0.5);
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		 width * 0.5);
+   }
+   glEnd();
+
+   glNormal3f(0.0, 0.0, -1.0);
+
+   /* draw back face */
+   glBegin(GL_QUAD_STRIP);
+   for (i = 0; i <= teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
+      if (i < teeth) {
+	 glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		    -width * 0.5);
+	 glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
+      }
+   }
+   glEnd();
+
+   /* draw back sides of teeth */
+   glBegin(GL_QUADS);
+   da = 2.0 * M_PI / teeth / 4.0;
+   for (i = 0; i < teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		 -width * 0.5);
+      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
+		 -width * 0.5);
+      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
+   }
+   glEnd();
+
+   /* draw outward faces of teeth */
+   glBegin(GL_QUAD_STRIP);
+   for (i = 0; i < teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
+      u = r2 * cos(angle + da) - r1 * cos(angle);
+      v = r2 * sin(angle + da) - r1 * sin(angle);
+      len = sqrt(u * u + v * v);
+      u /= len;
+      v /= len;
+      glNormal3f(v, -u, 0.0);
+      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
+      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
+      glNormal3f(cos(angle), sin(angle), 0.0);
+      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
+		 width * 0.5);
+      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
+		 -width * 0.5);
+      u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da);
+      v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da);
+      glNormal3f(v, -u, 0.0);
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		 width * 0.5);
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		 -width * 0.5);
+      glNormal3f(cos(angle), sin(angle), 0.0);
+   }
+
+   glVertex3f(r1 * cos(0), r1 * sin(0), width * 0.5);
+   glVertex3f(r1 * cos(0), r1 * sin(0), -width * 0.5);
+
+   glEnd();
+
+   glShadeModel(GL_SMOOTH);
+
+   /* draw inside radius cylinder */
+   glBegin(GL_QUAD_STRIP);
+   for (i = 0; i <= teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+      glNormal3f(-cos(angle), -sin(angle), 0.0);
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
+   }
+   glEnd();
+}
+
+
+static void
+do_draw(void)
+{
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   glPushMatrix();
+   glRotatef(view_rotx, 1.0, 0.0, 0.0);
+   glRotatef(view_roty, 0.0, 1.0, 0.0);
+   glRotatef(view_rotz, 0.0, 0.0, 1.0);
+
+   glPushMatrix();
+   glTranslatef(-3.0, -2.0, 0.0);
+   glRotatef(angle, 0.0, 0.0, 1.0);
+   glCallList(gear1);
+   glPopMatrix();
+
+   glPushMatrix();
+   glTranslatef(3.1, -2.0, 0.0);
+   glRotatef(-2.0 * angle - 9.0, 0.0, 0.0, 1.0);
+   glCallList(gear2);
+   glPopMatrix();
+
+   glPushMatrix();
+   glTranslatef(-3.1, 4.2, 0.0);
+   glRotatef(-2.0 * angle - 25.0, 0.0, 0.0, 1.0);
+   glCallList(gear3);
+   glPopMatrix();
+
+   glPopMatrix();
+}
+
+static void
+draw(void)
+{
+   if (stereo) {
+      /* First left eye.  */
+      glDrawBuffer(GL_BACK_LEFT);
+
+      glMatrixMode(GL_PROJECTION);
+      glLoadIdentity();
+      glFrustum(left, right, -asp, asp, 5.0, 60.0);
+
+      glMatrixMode(GL_MODELVIEW);
+
+      glPushMatrix();
+      glTranslated(+0.5 * eyesep, 0.0, 0.0);
+      do_draw();
+      glPopMatrix();
+
+      /* Then right eye.  */
+      glDrawBuffer(GL_BACK_RIGHT);
+
+      glMatrixMode(GL_PROJECTION);
+      glLoadIdentity();
+      glFrustum(-right, -left, -asp, asp, 5.0, 60.0);
+
+      glMatrixMode(GL_MODELVIEW);
+
+      glPushMatrix();
+      glTranslated(-0.5 * eyesep, 0.0, 0.0);
+      do_draw();
+      glPopMatrix();
+   } else
+      do_draw();
+}
+
+
+/* new window size or exposure */
+static void
+reshape(int width, int height)
+{
+   glViewport(0, 0, (GLint) width, (GLint) height);
+
+   if (stereo) {
+      GLfloat w;
+
+      asp = (GLfloat) height / (GLfloat) width;
+      w = fix_point * (1.0 / 5.0);
+
+      left = -5.0 * ((w - 0.5 * eyesep) / fix_point);
+      right = 5.0 * ((w + 0.5 * eyesep) / fix_point);
+   } else {
+      GLfloat h = (GLfloat) height / (GLfloat) width;
+
+      glMatrixMode(GL_PROJECTION);
+      glLoadIdentity();
+      glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0);
+   }
+   
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef(0.0, 0.0, -40.0);
+}
+   
+
+
+static void
+init(void)
+{
+   static GLfloat pos[4] = { 5.0, 5.0, 10.0, 0.0 };
+   static GLfloat red[4] = { 0.8, 0.1, 0.0, 1.0 };
+   static GLfloat green[4] = { 0.0, 0.8, 0.2, 1.0 };
+   static GLfloat blue[4] = { 0.2, 0.2, 1.0, 1.0 };
+
+   glLightfv(GL_LIGHT0, GL_POSITION, pos);
+   glEnable(GL_CULL_FACE);
+   glEnable(GL_LIGHTING);
+   glEnable(GL_LIGHT0);
+   glEnable(GL_DEPTH_TEST);
+
+   /* make the gears */
+   gear1 = glGenLists(1);
+   glNewList(gear1, GL_COMPILE);
+   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
+   gear(1.0, 4.0, 1.0, 20, 0.7);
+   glEndList();
+
+   gear2 = glGenLists(1);
+   glNewList(gear2, GL_COMPILE);
+   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
+   gear(0.5, 2.0, 2.0, 10, 0.7);
+   glEndList();
+
+   gear3 = glGenLists(1);
+   glNewList(gear3, GL_COMPILE);
+   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
+   gear(1.3, 2.0, 0.5, 10, 0.7);
+   glEndList();
+
+   glEnable(GL_NORMALIZE);
+}
+
+
+/*
+ * Create an RGB, double-buffered window.
+ * Return the window and context handles.
+ */
+static void
+make_window( Display *dpy, const char *name,
+             int x, int y, int width, int height,
+             Window *winRet, GLXContext *ctxRet)
+{
+   int attribs[] = { GLX_RGBA,
+                     GLX_RED_SIZE, 1,
+                     GLX_GREEN_SIZE, 1,
+                     GLX_BLUE_SIZE, 1,
+                     GLX_DOUBLEBUFFER,
+                     GLX_DEPTH_SIZE, 1,
+                     None };
+   int stereoAttribs[] = { GLX_RGBA,
+                           GLX_RED_SIZE, 1,
+                           GLX_GREEN_SIZE, 1,
+                           GLX_BLUE_SIZE, 1,
+                           GLX_DOUBLEBUFFER,
+                           GLX_DEPTH_SIZE, 1,
+                           GLX_STEREO,
+                           None };
+   int scrnum;
+   XSetWindowAttributes attr;
+   unsigned long mask;
+   Window root;
+   Window win;
+   GLXContext ctx;
+   XVisualInfo *visinfo;
+
+   scrnum = DefaultScreen( dpy );
+   root = RootWindow( dpy, scrnum );
+
+   if (fullscreen) {
+      x = 0; y = 0;
+      width = DisplayWidth( dpy, scrnum );
+      height = DisplayHeight( dpy, scrnum );
+   }
+
+   if (stereo)
+      visinfo = glXChooseVisual( dpy, scrnum, stereoAttribs );
+   else
+      visinfo = glXChooseVisual( dpy, scrnum, attribs );
+   if (!visinfo) {
+      if (stereo) {
+         printf("Error: couldn't get an RGB, "
+                "Double-buffered, Stereo visual\n");
+      } else
+         printf("Error: couldn't get an RGB, Double-buffered visual\n");
+      exit(1);
+   }
+
+   /* window attributes */
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
+   attr.override_redirect = fullscreen;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask | CWOverrideRedirect;
+
+   win = XCreateWindow( dpy, root, 0, 0, width, height,
+		        0, visinfo->depth, InputOutput,
+		        visinfo->visual, mask, &attr );
+
+   /* set hints and properties */
+   {
+      XSizeHints sizehints;
+      sizehints.x = x;
+      sizehints.y = y;
+      sizehints.width  = width;
+      sizehints.height = height;
+      sizehints.flags = USSize | USPosition;
+      XSetNormalHints(dpy, win, &sizehints);
+      XSetStandardProperties(dpy, win, name, name,
+                              None, (char **)NULL, 0, &sizehints);
+   }
+
+   ctx = glXCreateContext( dpy, visinfo, NULL, True );
+   if (!ctx) {
+      printf("Error: glXCreateContext failed\n");
+      exit(1);
+   }
+
+   XFree(visinfo);
+
+   *winRet = win;
+   *ctxRet = ctx;
+}
+
+
+static void
+event_loop(Display *dpy, Window win)
+{
+   while (1) {
+      while (XPending(dpy) > 0) {
+         XEvent event;
+         XNextEvent(dpy, &event);
+         switch (event.type) {
+	 case Expose:
+            /* we'll redraw below */
+	    break;
+	 case ConfigureNotify:
+	    reshape(event.xconfigure.width, event.xconfigure.height);
+	    break;
+         case KeyPress:
+            {
+               char buffer[10];
+               int r, code;
+               code = XLookupKeysym(&event.xkey, 0);
+               if (code == XK_Left) {
+                  view_roty += 5.0;
+               }
+               else if (code == XK_Right) {
+                  view_roty -= 5.0;
+               }
+               else if (code == XK_Up) {
+                  view_rotx += 5.0;
+               }
+               else if (code == XK_Down) {
+                  view_rotx -= 5.0;
+               }
+               else {
+                  r = XLookupString(&event.xkey, buffer, sizeof(buffer),
+                                    NULL, NULL);
+                  if (buffer[0] == 27) {
+                     /* escape */
+                     return;
+                  }
+               }
+            }
+         }
+      }
+
+      {
+         static int frames = 0;
+         static double tRot0 = -1.0, tRate0 = -1.0;
+         double dt, t = current_time();
+         if (tRot0 < 0.0)
+            tRot0 = t;
+         dt = t - tRot0;
+         tRot0 = t;
+
+         /* advance rotation for next frame */
+         angle += 70.0 * dt;  /* 70 degrees per second */
+         if (angle > 3600.0)
+             angle -= 3600.0;
+
+         draw();
+         glXSwapBuffers(dpy, win);
+
+         frames++;
+
+         if (tRate0 < 0.0)
+            tRate0 = t;
+         if (t - tRate0 >= 5.0) {
+            GLfloat seconds = t - tRate0;
+            GLfloat fps = frames / seconds;
+            printf("%d frames in %3.1f seconds = %6.3f FPS\n", frames, seconds,
+                   fps);
+            tRate0 = t;
+            frames = 0;
+         }
+      }
+   }
+}
+
+
+static void
+usage(void)
+{
+   printf("Usage:\n");
+   printf("  -display <displayname>  set the display to run on\n");
+   printf("  -stereo                 run in stereo mode\n");
+   printf("  -fullscreen             run in fullscreen mode\n");
+   printf("  -info                   display OpenGL renderer info\n");
+}
+ 
+
+int
+main(int argc, char *argv[])
+{
+   const int winWidth = 300, winHeight = 300;
+   Display *dpy;
+   Window win;
+   GLXContext ctx;
+   char *dpyName = NULL;
+   GLboolean printInfo = GL_FALSE;
+   int i;
+
+   for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "-display") == 0) {
+         dpyName = argv[i+1];
+         i++;
+      }
+      else if (strcmp(argv[i], "-info") == 0) {
+         printInfo = GL_TRUE;
+      }
+      else if (strcmp(argv[i], "-stereo") == 0) {
+         stereo = GL_TRUE;
+      }
+      else if (strcmp(argv[i], "-fullscreen") == 0) {
+         fullscreen = GL_TRUE;
+      }
+      else {
+         usage();
+         return -1;
+      }
+   }
+
+   dpy = XOpenDisplay(dpyName);
+   if (!dpy) {
+      printf("Error: couldn't open display %s\n",
+	     dpyName ? dpyName : getenv("DISPLAY"));
+      return -1;
+   }
+
+   make_window(dpy, "glxgears", 0, 0, winWidth, winHeight, &win, &ctx);
+   XMapWindow(dpy, win);
+   glXMakeCurrent(dpy, win, ctx);
+
+   if (printInfo) {
+      printf("GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
+      printf("GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
+      printf("GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
+      printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
+   }
+
+   init();
+
+   /* Set initial projection/viewing transformation.
+    * We can't be sure we'll get a ConfigureNotify event when the window
+    * first appears.
+    */
+   reshape(winWidth, winHeight);
+
+   event_loop(dpy, win);
+
+   glDeleteLists(gear1, 1);
+   glDeleteLists(gear2, 1);
+   glDeleteLists(gear3, 1);
+   glXDestroyContext(dpy, ctx);
+   XDestroyWindow(dpy, win);
+   XCloseDisplay(dpy);
+
+   return 0;
+}
diff --git a/progs/xdemos/glxgears2.c b/progs/xdemos/glxgears2.c
new file mode 100644
index 00000000000..5de5601240e
--- /dev/null
+++ b/progs/xdemos/glxgears2.c
@@ -0,0 +1,522 @@
+/*
+ * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/*
+ * This is a port of the infamous "gears" demo to straight GLX (i.e. no GLUT)
+ * Port by Brian Paul  23 March 2001
+ *
+ * Command line options:
+ *    -info      print GL implementation information
+ *
+ */
+
+
+#include <math.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <X11/Xlib.h>
+#include <X11/keysym.h>
+#include <GL/gl.h>
+#include <GL/glx.h>
+
+
+#define BENCHMARK
+
+#ifdef BENCHMARK
+
+/* XXX this probably isn't very portable */
+
+#include <sys/time.h>
+#include <unistd.h>
+
+/* return current time (in seconds) */
+static int
+current_time(void)
+{
+   struct timeval tv;
+#ifdef __VMS
+   (void) gettimeofday(&tv, NULL );
+#else
+   struct timezone tz;
+   (void) gettimeofday(&tv, &tz);
+#endif
+   return (int) tv.tv_sec;
+}
+
+#else /*BENCHMARK*/
+
+/* dummy */
+static int
+current_time(void)
+{
+   return 0;
+}
+
+#endif /*BENCHMARK*/
+
+
+
+#ifndef M_PI
+#define M_PI 3.14159265
+#endif
+
+
+static GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0;
+static GLint gear1, gear2, gear3;
+static GLfloat angle = 0.0;
+static GLint WinWidth = 300, WinHeight = 300;
+
+/*
+ *
+ *  Draw a gear wheel.  You'll probably want to call this function when
+ *  building a display list since we do a lot of trig here.
+ * 
+ *  Input:  inner_radius - radius of hole at center
+ *          outer_radius - radius at center of teeth
+ *          width - width of gear
+ *          teeth - number of teeth
+ *          tooth_depth - depth of tooth
+ */
+static void
+gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
+     GLint teeth, GLfloat tooth_depth)
+{
+   GLint i;
+   GLfloat r0, r1, r2;
+   GLfloat angle, da;
+   GLfloat u, v, len;
+
+   r0 = inner_radius;
+   r1 = outer_radius - tooth_depth / 2.0;
+   r2 = outer_radius + tooth_depth / 2.0;
+
+   da = 2.0 * M_PI / teeth / 4.0;
+
+   glShadeModel(GL_FLAT);
+
+   glNormal3f(0.0, 0.0, 1.0);
+
+   /* draw front face */
+   glBegin(GL_QUAD_STRIP);
+   for (i = 0; i <= teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
+      if (i < teeth) {
+	 glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
+	 glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		    width * 0.5);
+      }
+   }
+   glEnd();
+
+   /* draw front sides of teeth */
+   glBegin(GL_QUADS);
+   da = 2.0 * M_PI / teeth / 4.0;
+   for (i = 0; i < teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
+      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
+      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
+		 width * 0.5);
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		 width * 0.5);
+   }
+   glEnd();
+
+   glNormal3f(0.0, 0.0, -1.0);
+
+   /* draw back face */
+   glBegin(GL_QUAD_STRIP);
+   for (i = 0; i <= teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
+      if (i < teeth) {
+	 glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		    -width * 0.5);
+	 glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
+      }
+   }
+   glEnd();
+
+   /* draw back sides of teeth */
+   glBegin(GL_QUADS);
+   da = 2.0 * M_PI / teeth / 4.0;
+   for (i = 0; i < teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		 -width * 0.5);
+      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
+		 -width * 0.5);
+      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
+   }
+   glEnd();
+
+   /* draw outward faces of teeth */
+   glBegin(GL_QUAD_STRIP);
+   for (i = 0; i < teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
+      u = r2 * cos(angle + da) - r1 * cos(angle);
+      v = r2 * sin(angle + da) - r1 * sin(angle);
+      len = sqrt(u * u + v * v);
+      u /= len;
+      v /= len;
+      glNormal3f(v, -u, 0.0);
+      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
+      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
+      glNormal3f(cos(angle), sin(angle), 0.0);
+      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
+		 width * 0.5);
+      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
+		 -width * 0.5);
+      u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da);
+      v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da);
+      glNormal3f(v, -u, 0.0);
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		 width * 0.5);
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		 -width * 0.5);
+      glNormal3f(cos(angle), sin(angle), 0.0);
+   }
+
+   glVertex3f(r1 * cos(0), r1 * sin(0), width * 0.5);
+   glVertex3f(r1 * cos(0), r1 * sin(0), -width * 0.5);
+
+   glEnd();
+
+   glShadeModel(GL_SMOOTH);
+
+   /* draw inside radius cylinder */
+   glBegin(GL_QUAD_STRIP);
+   for (i = 0; i <= teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+      glNormal3f(-cos(angle), -sin(angle), 0.0);
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
+   }
+   glEnd();
+}
+
+
+static void
+draw(void)
+{
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   glPushMatrix();
+   glRotatef(view_rotx, 1.0, 0.0, 0.0);
+   glRotatef(view_roty, 0.0, 1.0, 0.0);
+   glRotatef(view_rotz, 0.0, 0.0, 1.0);
+
+   glPushMatrix();
+   glTranslatef(-3.0, -2.0, 0.0);
+   glRotatef(angle, 0.0, 0.0, 1.0);
+   glCallList(gear1);
+   glPopMatrix();
+
+   glPushMatrix();
+   glTranslatef(3.1, -2.0, 0.0);
+   glRotatef(-2.0 * angle - 9.0, 0.0, 0.0, 1.0);
+   glCallList(gear2);
+   glPopMatrix();
+
+   glPushMatrix();
+   glTranslatef(-3.1, 4.2, 0.0);
+   glRotatef(-2.0 * angle - 25.0, 0.0, 0.0, 1.0);
+   glCallList(gear3);
+   glPopMatrix();
+
+   glPopMatrix();
+}
+
+
+/* new window size or exposure */
+static void
+reshape(int width, int height)
+{
+   GLfloat h = (GLfloat) height / (GLfloat) width;
+
+   glViewport(0, 0, (GLint) width, (GLint) height);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef(0.0, 0.0, -40.0);
+   WinWidth = width;
+   WinHeight = height;
+}
+
+
+static void
+init(void)
+{
+   static GLfloat pos[4] = { 5.0, 5.0, 10.0, 0.0 };
+   static GLfloat red[4] = { 0.8, 0.1, 0.0, 1.0 };
+   static GLfloat green[4] = { 0.0, 0.8, 0.2, 1.0 };
+   static GLfloat blue[4] = { 0.2, 0.2, 1.0, 1.0 };
+
+   glClearColor(1, 0, 0, 0);
+
+   glLightfv(GL_LIGHT0, GL_POSITION, pos);
+   glEnable(GL_CULL_FACE);
+   glEnable(GL_LIGHTING);
+   glEnable(GL_LIGHT0);
+   glEnable(GL_DEPTH_TEST);
+
+   /* make the gears */
+   gear1 = glGenLists(1);
+   glNewList(gear1, GL_COMPILE);
+   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
+   gear(1.0, 4.0, 1.0, 20, 0.7);
+   glEndList();
+
+   gear2 = glGenLists(1);
+   glNewList(gear2, GL_COMPILE);
+   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
+   gear(0.5, 2.0, 2.0, 10, 0.7);
+   glEndList();
+
+   gear3 = glGenLists(1);
+   glNewList(gear3, GL_COMPILE);
+   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
+   gear(1.3, 2.0, 0.5, 10, 0.7);
+   glEndList();
+
+   glEnable(GL_NORMALIZE);
+}
+
+
+/*
+ * Create an RGB, double-buffered window.
+ * Return the window and context handles.
+ */
+static void
+make_window( Display *dpy, const char *name,
+             int x, int y, int width, int height,
+             Window *winRet, GLXContext *ctxRet)
+{
+   int attrib[] = { GLX_RGBA,
+		    GLX_RED_SIZE, 1,
+		    GLX_GREEN_SIZE, 1,
+		    GLX_BLUE_SIZE, 1,
+		    GLX_DOUBLEBUFFER,
+		    GLX_DEPTH_SIZE, 1,
+		    None };
+   int scrnum;
+   XSetWindowAttributes attr;
+   unsigned long mask;
+   Window root;
+   Window win;
+   GLXContext ctx;
+   XVisualInfo *visinfo;
+
+   scrnum = DefaultScreen( dpy );
+   root = RootWindow( dpy, scrnum );
+
+   visinfo = glXChooseVisual( dpy, scrnum, attrib );
+   if (!visinfo) {
+      printf("Error: couldn't get an RGB, Double-buffered visual\n");
+      exit(1);
+   }
+
+   /* window attributes */
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+
+   win = XCreateWindow( dpy, root, 0, 0, width, height,
+		        0, visinfo->depth, InputOutput,
+		        visinfo->visual, mask, &attr );
+
+   /* set hints and properties */
+   {
+      XSizeHints sizehints;
+      sizehints.x = x;
+      sizehints.y = y;
+      sizehints.width  = width;
+      sizehints.height = height;
+      sizehints.flags = USSize | USPosition;
+      XSetNormalHints(dpy, win, &sizehints);
+      XSetStandardProperties(dpy, win, name, name,
+                              None, (char **)NULL, 0, &sizehints);
+   }
+
+   ctx = glXCreateContext( dpy, visinfo, NULL, True );
+   if (!ctx) {
+      printf("Error: glXCreateContext failed\n");
+      exit(1);
+   }
+
+   XFree(visinfo);
+
+   *winRet = win;
+   *ctxRet = ctx;
+}
+
+
+static void
+event_loop(Display *dpy, Window win)
+{
+   while (1) {
+      while (XPending(dpy) > 0) {
+         XEvent event;
+         XNextEvent(dpy, &event);
+         switch (event.type) {
+	 case Expose:
+            /* we'll redraw below */
+	    break;
+	 case ConfigureNotify:
+	    reshape(event.xconfigure.width, event.xconfigure.height);
+	    break;
+         case KeyPress:
+            {
+               char buffer[10];
+               int r, code;
+               code = XLookupKeysym(&event.xkey, 0);
+               if (code == XK_Left) {
+                  view_roty += 5.0;
+               }
+               else if (code == XK_Right) {
+                  view_roty -= 5.0;
+               }
+               else if (code == XK_Up) {
+                  view_rotx += 5.0;
+               }
+               else if (code == XK_Down) {
+                  view_rotx -= 5.0;
+               }
+               else {
+                  r = XLookupString(&event.xkey, buffer, sizeof(buffer),
+                                    NULL, NULL);
+                  if (buffer[0] == 27) {
+                     /* escape */
+                     return;
+                  }
+               }
+            }
+         }
+      }
+
+      /* next frame */
+      angle += 2.0;
+
+      draw();
+
+#if 0
+      glXSwapBuffers(dpy, win);
+#else
+      {
+         GLfloat c[4];
+
+         glReadBuffer(GL_BACK);
+
+         glReadPixels(WinWidth-1, 0, 1, 1, GL_RGB, GL_FLOAT, c);
+         printf("Bottom right pixel color: %g, %g, %g\n", c[0], c[1], c[2]);
+
+         glDrawBuffer(GL_FRONT);
+         glWindowPos2iARB(0,0);
+         glCopyPixels(WinWidth/2, 0, WinWidth/2, WinHeight, GL_COLOR);
+         glDrawBuffer(GL_BACK);
+      }
+#endif
+
+      /* calc framerate */
+      {
+         static int t0 = -1;
+         static int frames = 0;
+         int t = current_time();
+
+         if (t0 < 0)
+            t0 = t;
+
+         frames++;
+
+         if (t - t0 >= 5.0) {
+            GLfloat seconds = t - t0;
+            GLfloat fps = frames / seconds;
+            printf("%d frames in %3.1f seconds = %6.3f FPS\n", frames, seconds,
+                   fps);
+            t0 = t;
+            frames = 0;
+         }
+      }
+   }
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   Display *dpy;
+   Window win;
+   GLXContext ctx;
+   char *dpyName = ":0";
+   GLboolean printInfo = GL_FALSE;
+   int i;
+
+   for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "-display") == 0) {
+         dpyName = argv[i+1];
+         i++;
+      }
+      else if (strcmp(argv[i], "-info") == 0) {
+         printInfo = GL_TRUE;
+      }
+   }
+
+   dpy = XOpenDisplay(dpyName);
+   if (!dpy) {
+      printf("Error: couldn't open display %s\n", dpyName);
+      return -1;
+   }
+
+   make_window(dpy, "glxgears", 0, 0, WinWidth, WinHeight, &win, &ctx);
+   XMapWindow(dpy, win);
+   glXMakeCurrent(dpy, win, ctx);
+
+   if (printInfo) {
+      printf("GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
+      printf("GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
+      printf("GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
+      printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
+   }
+
+   init();
+
+   event_loop(dpy, win);
+
+   glXDestroyContext(dpy, ctx);
+   XDestroyWindow(dpy, win);
+   XCloseDisplay(dpy);
+
+   return 0;
+}
diff --git a/progs/xdemos/glxgears_fbconfig.c b/progs/xdemos/glxgears_fbconfig.c
new file mode 100644
index 00000000000..acbadd21ac5
--- /dev/null
+++ b/progs/xdemos/glxgears_fbconfig.c
@@ -0,0 +1,602 @@
+/*
+ * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * \file glxgears_fbconfig.c
+ * Yet-another-version of gears.  Originally ported to GLX by Brian Paul on
+ * 23 March 2001.  Modified to use fbconfigs by Ian Romanick on 10 Feb 2004.
+ *
+ * Command line options:
+ *    -info      print GL implementation information
+ *
+ * \author Brian Paul
+ * \author Ian Romanick <[email protected]>
+ */
+
+
+#define GLX_GLXEXT_PROTOTYPES
+
+#include <math.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <X11/Xlib.h>
+#include <X11/keysym.h>
+#include <GL/gl.h>
+#include <GL/glx.h>
+#include <GL/glxext.h>
+#include <assert.h>
+#include "pbutil.h"
+
+/* I had to use the SGIX versions of these because for some reason glxext.h
+ * doesn't define the core versions if GLX_VERSION_1_3 is defined, and glx.h
+ * doesn't define them at all.  One or both header files is clearly broken.
+ */
+static PFNGLXCHOOSEFBCONFIGSGIXPROC choose_fbconfig = NULL;
+static PFNGLXGETVISUALFROMFBCONFIGSGIXPROC get_visual_from_fbconfig = NULL;
+static PFNGLXCREATECONTEXTWITHCONFIGSGIXPROC create_new_context = NULL;
+
+#define BENCHMARK
+
+#ifdef BENCHMARK
+
+/* XXX this probably isn't very portable */
+
+#include <sys/time.h>
+#include <unistd.h>
+
+/* return current time (in seconds) */
+static int
+current_time(void)
+{
+   struct timeval tv;
+#ifdef __VMS
+   (void) gettimeofday(&tv, NULL );
+#else
+   struct timezone tz;
+   (void) gettimeofday(&tv, &tz);
+#endif
+   return (int) tv.tv_sec;
+}
+
+#else /*BENCHMARK*/
+
+/* dummy */
+static int
+current_time(void)
+{
+   return 0;
+}
+
+#endif /*BENCHMARK*/
+
+
+
+#ifndef M_PI
+#define M_PI 3.14159265
+#endif
+
+
+static GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0;
+static GLint gear1, gear2, gear3;
+static GLfloat angle = 0.0;
+
+
+/*
+ *
+ *  Draw a gear wheel.  You'll probably want to call this function when
+ *  building a display list since we do a lot of trig here.
+ * 
+ *  Input:  inner_radius - radius of hole at center
+ *          outer_radius - radius at center of teeth
+ *          width - width of gear
+ *          teeth - number of teeth
+ *          tooth_depth - depth of tooth
+ */
+static void
+gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
+     GLint teeth, GLfloat tooth_depth)
+{
+   GLint i;
+   GLfloat r0, r1, r2;
+   GLfloat angle, da;
+   GLfloat u, v, len;
+
+   r0 = inner_radius;
+   r1 = outer_radius - tooth_depth / 2.0;
+   r2 = outer_radius + tooth_depth / 2.0;
+
+   da = 2.0 * M_PI / teeth / 4.0;
+
+   glShadeModel(GL_FLAT);
+
+   glNormal3f(0.0, 0.0, 1.0);
+
+   /* draw front face */
+   glBegin(GL_QUAD_STRIP);
+   for (i = 0; i <= teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
+      if (i < teeth) {
+	 glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
+	 glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		    width * 0.5);
+      }
+   }
+   glEnd();
+
+   /* draw front sides of teeth */
+   glBegin(GL_QUADS);
+   da = 2.0 * M_PI / teeth / 4.0;
+   for (i = 0; i < teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
+      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
+      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
+		 width * 0.5);
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		 width * 0.5);
+   }
+   glEnd();
+
+   glNormal3f(0.0, 0.0, -1.0);
+
+   /* draw back face */
+   glBegin(GL_QUAD_STRIP);
+   for (i = 0; i <= teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
+      if (i < teeth) {
+	 glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		    -width * 0.5);
+	 glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
+      }
+   }
+   glEnd();
+
+   /* draw back sides of teeth */
+   glBegin(GL_QUADS);
+   da = 2.0 * M_PI / teeth / 4.0;
+   for (i = 0; i < teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		 -width * 0.5);
+      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
+		 -width * 0.5);
+      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
+   }
+   glEnd();
+
+   /* draw outward faces of teeth */
+   glBegin(GL_QUAD_STRIP);
+   for (i = 0; i < teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
+      u = r2 * cos(angle + da) - r1 * cos(angle);
+      v = r2 * sin(angle + da) - r1 * sin(angle);
+      len = sqrt(u * u + v * v);
+      u /= len;
+      v /= len;
+      glNormal3f(v, -u, 0.0);
+      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
+      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
+      glNormal3f(cos(angle), sin(angle), 0.0);
+      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
+		 width * 0.5);
+      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
+		 -width * 0.5);
+      u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da);
+      v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da);
+      glNormal3f(v, -u, 0.0);
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		 width * 0.5);
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		 -width * 0.5);
+      glNormal3f(cos(angle), sin(angle), 0.0);
+   }
+
+   glVertex3f(r1 * cos(0), r1 * sin(0), width * 0.5);
+   glVertex3f(r1 * cos(0), r1 * sin(0), -width * 0.5);
+
+   glEnd();
+
+   glShadeModel(GL_SMOOTH);
+
+   /* draw inside radius cylinder */
+   glBegin(GL_QUAD_STRIP);
+   for (i = 0; i <= teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+      glNormal3f(-cos(angle), -sin(angle), 0.0);
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
+   }
+   glEnd();
+}
+
+
+static void
+draw(void)
+{
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   glPushMatrix();
+   glRotatef(view_rotx, 1.0, 0.0, 0.0);
+   glRotatef(view_roty, 0.0, 1.0, 0.0);
+   glRotatef(view_rotz, 0.0, 0.0, 1.0);
+
+   glPushMatrix();
+   glTranslatef(-3.0, -2.0, 0.0);
+   glRotatef(angle, 0.0, 0.0, 1.0);
+   glCallList(gear1);
+   glPopMatrix();
+
+   glPushMatrix();
+   glTranslatef(3.1, -2.0, 0.0);
+   glRotatef(-2.0 * angle - 9.0, 0.0, 0.0, 1.0);
+   glCallList(gear2);
+   glPopMatrix();
+
+   glPushMatrix();
+   glTranslatef(-3.1, 4.2, 0.0);
+   glRotatef(-2.0 * angle - 25.0, 0.0, 0.0, 1.0);
+   glCallList(gear3);
+   glPopMatrix();
+
+   glPopMatrix();
+}
+
+
+/* new window size or exposure */
+static void
+reshape(int width, int height)
+{
+   GLfloat h = (GLfloat) height / (GLfloat) width;
+
+   glViewport(0, 0, (GLint) width, (GLint) height);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef(0.0, 0.0, -40.0);
+}
+
+
+static void
+init(void)
+{
+   static GLfloat pos[4] = { 5.0, 5.0, 10.0, 0.0 };
+   static GLfloat red[4] = { 0.8, 0.1, 0.0, 1.0 };
+   static GLfloat green[4] = { 0.0, 0.8, 0.2, 1.0 };
+   static GLfloat blue[4] = { 0.2, 0.2, 1.0, 1.0 };
+
+   glLightfv(GL_LIGHT0, GL_POSITION, pos);
+   glEnable(GL_CULL_FACE);
+   glEnable(GL_LIGHTING);
+   glEnable(GL_LIGHT0);
+   glEnable(GL_DEPTH_TEST);
+
+   /* make the gears */
+   gear1 = glGenLists(1);
+   glNewList(gear1, GL_COMPILE);
+   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
+   gear(1.0, 4.0, 1.0, 20, 0.7);
+   glEndList();
+
+   gear2 = glGenLists(1);
+   glNewList(gear2, GL_COMPILE);
+   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
+   gear(0.5, 2.0, 2.0, 10, 0.7);
+   glEndList();
+
+   gear3 = glGenLists(1);
+   glNewList(gear3, GL_COMPILE);
+   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
+   gear(1.3, 2.0, 0.5, 10, 0.7);
+   glEndList();
+
+   glEnable(GL_NORMALIZE);
+}
+
+
+/**
+ * Initialize fbconfig related function pointers.
+ */
+static void
+init_fbconfig_functions(Display *dpy, int scrnum)
+{
+   const char * glx_extensions;
+   const char * match;
+   static const char ext_name[] = "GLX_SGIX_fbconfig";
+   const size_t len = strlen( ext_name );
+   int major;
+   int minor;
+   GLboolean ext_version_supported;
+   GLboolean glx_1_3_supported;
+
+
+   /* Determine if GLX 1.3 or greater is supported.
+    */
+   glXQueryVersion(dpy, & major, & minor);
+   glx_1_3_supported = (major == 1) && (minor >= 3);
+
+   /* Determine if GLX_SGIX_fbconfig is supported.
+    */
+   glx_extensions = glXQueryExtensionsString(dpy, scrnum);
+   match = strstr( glx_extensions, ext_name );
+
+   ext_version_supported = (match != NULL)
+       && ((match[len] == '\0') || (match[len] == ' '));
+
+   printf( "GLX 1.3 is %ssupported.\n",
+	   (glx_1_3_supported) ? "" : "not " );
+   printf( "%s is %ssupported.\n",
+	   ext_name, (ext_version_supported) ? "" : "not " );
+
+   if ( glx_1_3_supported ) {
+      choose_fbconfig = (PFNGLXCHOOSEFBCONFIGSGIXPROC) glXGetProcAddressARB( 
+		(GLubyte *) "glXChooseFBConfig");
+      get_visual_from_fbconfig = (PFNGLXGETVISUALFROMFBCONFIGSGIXPROC) glXGetProcAddressARB( 
+		(GLubyte *) "glXGetVisualFromFBConfig");
+      create_new_context = (PFNGLXCREATECONTEXTWITHCONFIGSGIXPROC) glXGetProcAddressARB(
+		(GLubyte *) "glXCreateNewContext");
+   }
+   else if ( ext_version_supported ) {
+      choose_fbconfig = (PFNGLXCHOOSEFBCONFIGSGIXPROC) glXGetProcAddressARB( 
+		(GLubyte *) "glXChooseFBConfigSGIX");
+      get_visual_from_fbconfig = (PFNGLXGETVISUALFROMFBCONFIGSGIXPROC) glXGetProcAddressARB( 
+		(GLubyte *) "glXGetVisualFromFBConfigSGIX");
+      create_new_context = (PFNGLXCREATECONTEXTWITHCONFIGSGIXPROC) glXGetProcAddressARB(
+		(GLubyte *) "glXCreateContextWithConfigSGIX");
+   }
+   else {
+      printf( "This demo requires either GLX 1.3 or %s be supported.\n",
+	      ext_name );
+      exit(1);
+   }
+
+   if ( choose_fbconfig == NULL ) {
+      printf( "glXChooseFBConfig not found!\n" );
+      exit(1);
+   }
+
+   if ( get_visual_from_fbconfig == NULL ) {
+      printf( "glXGetVisualFromFBConfig not found!\n" );
+      exit(1);
+   }
+
+   if ( create_new_context == NULL ) {
+      printf( "glXCreateNewContext not found!\n" );
+      exit(1);
+   }
+}
+
+
+/*
+ * Create an RGB, double-buffered window.
+ * Return the window and context handles.
+ */
+static void
+make_window( Display *dpy, const char *name,
+             int x, int y, int width, int height,
+             Window *winRet, GLXContext *ctxRet)
+{
+   int attrib[] = { GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
+		    GLX_RENDER_TYPE,   GLX_RGBA_BIT,
+		    GLX_RED_SIZE,      1,
+		    GLX_GREEN_SIZE,    1,
+		    GLX_BLUE_SIZE,     1,
+		    GLX_DOUBLEBUFFER,  GL_TRUE,
+		    GLX_DEPTH_SIZE,    1,
+		    None };
+   GLXFBConfig * fbconfig;
+   int num_configs;
+   int scrnum;
+   int i;
+   XSetWindowAttributes attr;
+   unsigned long mask;
+   Window root;
+   Window win;
+   GLXContext ctx;
+   XVisualInfo *visinfo;
+
+   scrnum = DefaultScreen( dpy );
+   root = RootWindow( dpy, scrnum );
+
+   init_fbconfig_functions(dpy, scrnum);
+   fbconfig = (*choose_fbconfig)(dpy, scrnum, attrib, & num_configs);
+   if (fbconfig == NULL) {
+      printf("Error: couldn't get an RGB, Double-buffered visual\n");
+      exit(1);
+   }
+
+   printf("\nThe following fbconfigs meet the requirements.  The first one "
+	  "will be used.\n\n");
+   for ( i = 0 ; i < num_configs ; i++ ) {
+      PrintFBConfigInfo(dpy, scrnum, fbconfig[i], GL_TRUE);
+   }
+
+   /* window attributes */
+   visinfo = (*get_visual_from_fbconfig)(dpy, fbconfig[0]);
+   assert(visinfo != NULL);
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+
+   win = XCreateWindow( dpy, root, 0, 0, width, height,
+		        0, visinfo->depth, InputOutput,
+		        visinfo->visual, mask, &attr );
+
+   /* set hints and properties */
+   {
+      XSizeHints sizehints;
+      sizehints.x = x;
+      sizehints.y = y;
+      sizehints.width  = width;
+      sizehints.height = height;
+      sizehints.flags = USSize | USPosition;
+      XSetNormalHints(dpy, win, &sizehints);
+      XSetStandardProperties(dpy, win, name, name,
+                              None, (char **)NULL, 0, &sizehints);
+   }
+
+   ctx = (*create_new_context)(dpy, fbconfig[0], GLX_RGBA_TYPE, NULL, GL_TRUE);
+   if (!ctx) {
+      printf("Error: glXCreateNewContext failed\n");
+      exit(1);
+   }
+
+   XFree(fbconfig);
+
+   *winRet = win;
+   *ctxRet = ctx;
+}
+
+
+static void
+event_loop(Display *dpy, Window win)
+{
+   while (1) {
+      while (XPending(dpy) > 0) {
+         XEvent event;
+         XNextEvent(dpy, &event);
+         switch (event.type) {
+	 case Expose:
+            /* we'll redraw below */
+	    break;
+	 case ConfigureNotify:
+	    reshape(event.xconfigure.width, event.xconfigure.height);
+	    break;
+         case KeyPress:
+            {
+               char buffer[10];
+               int r, code;
+               code = XLookupKeysym(&event.xkey, 0);
+               if (code == XK_Left) {
+                  view_roty += 5.0;
+               }
+               else if (code == XK_Right) {
+                  view_roty -= 5.0;
+               }
+               else if (code == XK_Up) {
+                  view_rotx += 5.0;
+               }
+               else if (code == XK_Down) {
+                  view_rotx -= 5.0;
+               }
+               else {
+                  r = XLookupString(&event.xkey, buffer, sizeof(buffer),
+                                    NULL, NULL);
+                  if (buffer[0] == 27) {
+                     /* escape */
+                     return;
+                  }
+               }
+            }
+         }
+      }
+
+      /* next frame */
+      angle += 2.0;
+
+      draw();
+      glXSwapBuffers(dpy, win);
+
+      /* calc framerate */
+      {
+         static int t0 = -1;
+         static int frames = 0;
+         int t = current_time();
+
+         if (t0 < 0)
+            t0 = t;
+
+         frames++;
+
+         if (t - t0 >= 5.0) {
+            GLfloat seconds = t - t0;
+            GLfloat fps = frames / seconds;
+            printf("%d frames in %3.1f seconds = %6.3f FPS\n", frames, seconds,
+                   fps);
+            t0 = t;
+            frames = 0;
+         }
+      }
+   }
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   Display *dpy;
+   Window win;
+   GLXContext ctx;
+   const char *dpyName = NULL;
+   GLboolean printInfo = GL_FALSE;
+   int i;
+
+   for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "-display") == 0) {
+         dpyName = argv[i+1];
+         i++;
+      }
+      else if (strcmp(argv[i], "-info") == 0) {
+         printInfo = GL_TRUE;
+      }
+   }
+
+   dpy = XOpenDisplay(dpyName);
+   if (!dpy) {
+      printf("Error: couldn't open display %s\n", dpyName);
+      return -1;
+   }
+
+   make_window(dpy, "glxgears", 0, 0, 300, 300, &win, &ctx);
+   XMapWindow(dpy, win);
+   glXMakeCurrent(dpy, win, ctx);
+
+   if (printInfo) {
+      printf("GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
+      printf("GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
+      printf("GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
+      printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
+   }
+
+   init();
+
+   event_loop(dpy, win);
+
+   glXDestroyContext(dpy, ctx);
+   XDestroyWindow(dpy, win);
+   XCloseDisplay(dpy);
+
+   return 0;
+}
diff --git a/progs/xdemos/glxheads.c b/progs/xdemos/glxheads.c
new file mode 100644
index 00000000000..0145a70e91c
--- /dev/null
+++ b/progs/xdemos/glxheads.c
@@ -0,0 +1,286 @@
+
+/*
+ * Exercise multiple GLX connections on multiple X displays.
+ * Direct GLX contexts are attempted first, then indirect.
+ * Each window will display a spinning green triangle.
+ *
+ * Copyright (C) 2000  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include <GL/gl.h>
+#include <GL/glx.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+
+
+/*
+ * Each display/window/context:
+ */
+struct head {
+   char DisplayName[1000];
+   Display *Dpy;
+   Window Win;
+   GLXContext Context;
+   float Angle;
+   char Renderer[1000];
+   char Vendor[1000];
+   char Version[1000];
+};
+
+
+#define MAX_HEADS 20
+static struct head Heads[MAX_HEADS];
+static int NumHeads = 0;
+
+
+static void
+Error(const char *display, const char *msg)
+{
+   fprintf(stderr, "Error on display %s - %s\n", display, msg);
+   exit(1);
+}
+
+
+static struct head *
+AddHead(const char *displayName)
+{
+   Display *dpy;
+   Window win;
+   GLXContext ctx;
+   int attrib[] = { GLX_RGBA,
+		    GLX_RED_SIZE, 1,
+		    GLX_GREEN_SIZE, 1,
+		    GLX_BLUE_SIZE, 1,
+		    GLX_DOUBLEBUFFER,
+		    None };
+   int scrnum;
+   XSetWindowAttributes attr;
+   unsigned long mask;
+   Window root;
+   XVisualInfo *visinfo;
+   int width = 300, height = 300;
+   int xpos = 10, ypos = 10;
+
+   if (NumHeads >= MAX_HEADS)
+      return NULL;
+
+   dpy = XOpenDisplay(displayName);
+   if (!dpy) {
+      Error(displayName, "Unable to open display");
+      return NULL;
+   }
+
+   scrnum = DefaultScreen(dpy);
+   root = RootWindow(dpy, scrnum);
+
+   visinfo = glXChooseVisual(dpy, scrnum, attrib);
+   if (!visinfo) {
+      Error(displayName, "Unable to find RGB, double-buffered visual");
+      return NULL;
+   }
+
+   /* window attributes */
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   attr.colormap = XCreateColormap(dpy, root, visinfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+
+   win = XCreateWindow(dpy, root, 0, 0, width, height,
+		        0, visinfo->depth, InputOutput,
+		        visinfo->visual, mask, &attr);
+   if (!win) {
+      Error(displayName, "Couldn't create window");
+      return NULL;
+   }
+
+   {
+      XSizeHints sizehints;
+      sizehints.x = xpos;
+      sizehints.y = ypos;
+      sizehints.width  = width;
+      sizehints.height = height;
+      sizehints.flags = USSize | USPosition;
+      XSetNormalHints(dpy, win, &sizehints);
+      XSetStandardProperties(dpy, win, displayName, displayName,
+                              None, (char **)NULL, 0, &sizehints);
+   }
+
+
+   ctx = glXCreateContext(dpy, visinfo, NULL, True);
+   if (!ctx) {
+      Error(displayName, "Couldn't create GLX context");
+      return NULL;
+   }
+
+   XMapWindow(dpy, win);
+
+   if (!glXMakeCurrent(dpy, win, ctx)) {
+      Error(displayName, "glXMakeCurrent failed");
+      printf("glXMakeCurrent failed in Redraw()\n");
+      return NULL;
+   }
+
+   /* save the info for this head */
+   {
+      struct head *h = &Heads[NumHeads];
+      strcpy(h->DisplayName, displayName);
+      h->Dpy = dpy;
+      h->Win = win;
+      h->Context = ctx;
+      h->Angle = 0.0;
+      strcpy(h->Version, (char *) glGetString(GL_VERSION));
+      strcpy(h->Vendor, (char *) glGetString(GL_VENDOR));
+      strcpy(h->Renderer, (char *) glGetString(GL_RENDERER));
+      NumHeads++;
+      return &Heads[NumHeads-1];
+   }
+
+}
+
+
+static void
+Redraw(struct head *h)
+{
+   if (!glXMakeCurrent(h->Dpy, h->Win, h->Context)) {
+      Error(h->DisplayName, "glXMakeCurrent failed");
+      printf("glXMakeCurrent failed in Redraw()\n");
+      return;
+   }
+
+   h->Angle += 1.0;
+
+   glShadeModel(GL_FLAT);
+   glClearColor(0.5, 0.5, 0.5, 1.0);
+   glClear(GL_COLOR_BUFFER_BIT);
+
+   /* draw green triangle */
+   glColor3f(0.0, 1.0, 0.0);
+   glPushMatrix();
+   glRotatef(h->Angle, 0, 0, 1);
+   glBegin(GL_TRIANGLES);
+   glVertex2f(0, 0.8);
+   glVertex2f(-0.8, -0.7);
+   glVertex2f(0.8, -0.7);
+   glEnd();
+   glPopMatrix();
+
+   glXSwapBuffers(h->Dpy, h->Win);
+}
+
+
+
+static void
+Resize(const struct head *h, unsigned int width, unsigned int height)
+{
+   if (!glXMakeCurrent(h->Dpy, h->Win, h->Context)) {
+      Error(h->DisplayName, "glXMakeCurrent failed in Resize()");
+      return;
+   }
+   glFlush();
+   glViewport(0, 0, width, height);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
+}
+
+
+
+static void
+EventLoop(void)
+{
+   while (1) {
+      int i;
+      for (i = 0; i < NumHeads; i++) {
+         struct head *h = &Heads[i];
+         while (XPending(h->Dpy) > 0) {
+            XEvent event;
+            XNextEvent(h->Dpy, &event);
+            if (event.xany.window == h->Win) {
+               switch (event.type) {
+                  case Expose:
+                     Redraw(h);
+                     break;
+                  case ConfigureNotify:
+                     Resize(h, event.xconfigure.width, event.xconfigure.height);
+                     break;
+                  case KeyPress:
+                     return;
+                  default:
+                     /*no-op*/ ;
+               }
+            }
+            else {
+               printf("window mismatch\n");
+            }
+         }
+         Redraw(h);
+      }
+      usleep(1);
+   }
+}
+
+
+
+static void
+PrintInfo(const struct head *h)
+{
+   printf("Name: %s\n", h->DisplayName);
+   printf("  Display:     %p\n", (void *) h->Dpy);
+   printf("  Window:      0x%x\n", (int) h->Win);
+   printf("  Context:     0x%lx\n", (long) h->Context);
+   printf("  GL_VERSION:  %s\n", h->Version);
+   printf("  GL_VENDOR:   %s\n", h->Vendor);
+   printf("  GL_RENDERER: %s\n", h->Renderer);
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   int i;
+   if (argc == 1) {
+      struct head *h;
+      printf("glxheads: exercise multiple GLX connections (any key = exit)\n");
+      printf("Usage:\n");
+      printf("  glxheads xdisplayname ...\n");
+      printf("Example:\n");
+      printf("  glxheads :0 mars:0 venus:1\n");
+      h = AddHead(":0");
+      if (h)
+         PrintInfo(h);
+   }
+   else {
+      for (i = 1; i < argc; i++) {
+         const char *name = argv[i];
+         struct head *h = AddHead(name);
+         if (h) {
+            PrintInfo(h);
+         }
+      }
+   }
+
+   EventLoop();
+   return 0;
+}
diff --git a/progs/xdemos/glxinfo.c b/progs/xdemos/glxinfo.c
new file mode 100644
index 00000000000..fdd1c0523f6
--- /dev/null
+++ b/progs/xdemos/glxinfo.c
@@ -0,0 +1,956 @@
+/*
+ * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * This program is a work-alike of the IRIX glxinfo program.
+ * Command line options:
+ *  -t                     print wide table
+ *  -v                     print verbose information
+ *  -display DisplayName   specify the X display to interogate
+ *  -b                     only print ID of "best" visual on screen 0
+ *  -i                     use indirect rendering connection only
+ *  -l                     print interesting OpenGL limits (added 5 Sep 2002)
+ *
+ * Brian Paul  26 January 2000
+ */
+
+#define GLX_GLXEXT_PROTOTYPES
+
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <GL/gl.h>
+#include <GL/glx.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+
+#ifndef GLX_NONE_EXT
+#define GLX_NONE_EXT  0x8000
+#endif
+
+#ifndef GLX_TRANSPARENT_RGB
+#define GLX_TRANSPARENT_RGB 0x8008
+#endif
+
+
+typedef enum
+{
+   Normal,
+   Wide,
+   Verbose
+} InfoMode;
+
+
+struct visual_attribs
+{
+   /* X visual attribs */
+   int id;
+   int klass;
+   int depth;
+   int redMask, greenMask, blueMask;
+   int colormapSize;
+   int bitsPerRGB;
+
+   /* GL visual attribs */
+   int supportsGL;
+   int transparentType;
+   int transparentRedValue;
+   int transparentGreenValue;
+   int transparentBlueValue;
+   int transparentAlphaValue;
+   int transparentIndexValue;
+   int bufferSize;
+   int level;
+   int rgba;
+   int doubleBuffer;
+   int stereo;
+   int auxBuffers;
+   int redSize, greenSize, blueSize, alphaSize;
+   int depthSize;
+   int stencilSize;
+   int accumRedSize, accumGreenSize, accumBlueSize, accumAlphaSize;
+   int numSamples, numMultisample;
+   int visualCaveat;
+};
+
+   
+/*
+ * Print a list of extensions, with word-wrapping.
+ */
+static void
+print_extension_list(const char *ext)
+{
+   const char *indentString = "    ";
+   const int indent = 4;
+   const int max = 79;
+   int width, i, j;
+
+   if (!ext || !ext[0])
+      return;
+
+   width = indent;
+   printf(indentString);
+   i = j = 0;
+   while (1) {
+      if (ext[j] == ' ' || ext[j] == 0) {
+         /* found end of an extension name */
+         const int len = j - i;
+         if (width + len > max) {
+            /* start a new line */
+            printf("\n");
+            width = indent;
+            printf(indentString);
+         }
+         /* print the extension name between ext[i] and ext[j] */
+         while (i < j) {
+            printf("%c", ext[i]);
+            i++;
+         }
+         /* either we're all done, or we'll continue with next extension */
+         width += len + 1;
+         if (ext[j] == 0) {
+            break;
+         }
+         else {
+            i++;
+            j++;
+            if (ext[j] == 0)
+               break;
+            printf(", ");
+            width += 2;
+         }
+      }
+      j++;
+   }
+   printf("\n");
+}
+
+
+static void
+print_display_info(Display *dpy)
+{
+   printf("name of display: %s\n", DisplayString(dpy));
+}
+
+
+/**
+ * Print interesting limits for vertex/fragment programs.
+ */
+static void
+print_program_limits(GLenum target)
+{
+#if defined(GL_ARB_vertex_program) || defined(GL_ARB_fragment_program)
+   struct token_name {
+      GLenum token;
+      const char *name;
+   };
+   static const struct token_name limits[] = {
+      { GL_MAX_PROGRAM_INSTRUCTIONS_ARB, "GL_MAX_PROGRAM_INSTRUCTIONS_ARB" },
+      { GL_MAX_PROGRAM_NATIVE_INSTRUCTIONS_ARB, "GL_MAX_PROGRAM_NATIVE_INSTRUCTIONS_ARB" },
+      { GL_MAX_PROGRAM_TEMPORARIES_ARB, "GL_MAX_PROGRAM_TEMPORARIES_ARB" },
+      { GL_MAX_PROGRAM_NATIVE_TEMPORARIES_ARB, "GL_MAX_PROGRAM_NATIVE_TEMPORARIES_ARB" },
+      { GL_MAX_PROGRAM_PARAMETERS_ARB, "GL_MAX_PROGRAM_PARAMETERS_ARB" },
+      { GL_MAX_PROGRAM_NATIVE_PARAMETERS_ARB, "GL_MAX_PROGRAM_NATIVE_PARAMETERS_ARB" },
+      { GL_MAX_PROGRAM_ATTRIBS_ARB, "GL_MAX_PROGRAM_ATTRIBS_ARB" },
+      { GL_MAX_PROGRAM_NATIVE_ATTRIBS_ARB, "GL_MAX_PROGRAM_NATIVE_ATTRIBS_ARB" },
+      { GL_MAX_PROGRAM_ADDRESS_REGISTERS_ARB, "GL_MAX_PROGRAM_ADDRESS_REGISTERS_ARB" },
+      { GL_MAX_PROGRAM_NATIVE_ADDRESS_REGISTERS_ARB, "GL_MAX_PROGRAM_NATIVE_ADDRESS_REGISTERS_ARB" },
+      { GL_MAX_PROGRAM_LOCAL_PARAMETERS_ARB, "GL_MAX_PROGRAM_LOCAL_PARAMETERS_ARB" },
+      { GL_MAX_PROGRAM_ENV_PARAMETERS_ARB, "GL_MAX_PROGRAM_ENV_PARAMETERS_ARB" },
+      { GL_MAX_PROGRAM_ALU_INSTRUCTIONS_ARB, "GL_MAX_PROGRAM_ALU_INSTRUCTIONS_ARB" },
+      { GL_MAX_PROGRAM_TEX_INSTRUCTIONS_ARB, "GL_MAX_PROGRAM_TEX_INSTRUCTIONS_ARB" },
+      { GL_MAX_PROGRAM_TEX_INDIRECTIONS_ARB, "GL_MAX_PROGRAM_TEX_INDIRECTIONS_ARB" },
+      { GL_MAX_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB, "GL_MAX_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB" },
+      { GL_MAX_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB, "GL_MAX_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB" },
+      { GL_MAX_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB, "GL_MAX_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB" },
+      { (GLenum) 0, NULL }
+   };
+   PFNGLGETPROGRAMIVARBPROC GetProgramivARB_func = (PFNGLGETPROGRAMIVARBPROC)
+      glXGetProcAddressARB((GLubyte *) "glGetProgramivARB");
+   GLint max[1];
+   int i;
+
+   if (target == GL_VERTEX_PROGRAM_ARB) {
+      printf("    GL_VERTEX_PROGRAM_ARB:\n");
+   }
+   else if (target == GL_FRAGMENT_PROGRAM_ARB) {
+      printf("    GL_FRAGMENT_PROGRAM_ARB:\n");
+   }
+   else {
+      return; /* something's wrong */
+   }
+
+   for (i = 0; limits[i].token; i++) {
+      GetProgramivARB_func(target, limits[i].token, max);
+      if (glGetError() == GL_NO_ERROR) {
+         printf("        %s = %d\n", limits[i].name, max[0]);
+      }
+   }
+#endif /* GL_ARB_vertex_program / GL_ARB_fragment_program */
+}
+
+
+/**
+ * Print interesting limits for vertex/fragment shaders.
+ */
+static void
+print_shader_limits(GLenum target)
+{
+   struct token_name {
+      GLenum token;
+      const char *name;
+   };
+#if defined(GL_ARB_vertex_shader)
+   static const struct token_name vertex_limits[] = {
+      { GL_MAX_VERTEX_UNIFORM_COMPONENTS_ARB, "GL_MAX_VERTEX_UNIFORM_COMPONENTS_ARB" },
+      { GL_MAX_VARYING_FLOATS_ARB, "GL_MAX_VARYING_FLOATS_ARB" },
+      { GL_MAX_VERTEX_ATTRIBS_ARB, "GL_MAX_VERTEX_ATTRIBS_ARB" },
+      { GL_MAX_TEXTURE_IMAGE_UNITS_ARB, "GL_MAX_TEXTURE_IMAGE_UNITS_ARB" },
+      { GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS_ARB, "GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS_ARB" },
+      { GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS_ARB, "GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS_ARB" },
+      { GL_MAX_TEXTURE_COORDS_ARB, "GL_MAX_TEXTURE_COORDS_ARB" },
+      { (GLenum) 0, NULL }
+   };
+#endif
+#if defined(GL_ARB_fragment_shader)
+   static const struct token_name fragment_limits[] = {
+      { GL_MAX_FRAGMENT_UNIFORM_COMPONENTS_ARB, "GL_MAX_FRAGMENT_UNIFORM_COMPONENTS_ARB" },
+      { GL_MAX_TEXTURE_COORDS_ARB, "GL_MAX_TEXTURE_COORDS_ARB" },
+      { GL_MAX_TEXTURE_IMAGE_UNITS_ARB, "GL_MAX_TEXTURE_IMAGE_UNITS_ARB" },
+      { (GLenum) 0, NULL }
+   };
+#endif
+   GLint max[1];
+   int i;
+
+#if defined(GL_ARB_vertex_shader)
+   if (target == GL_VERTEX_SHADER_ARB) {
+      printf("    GL_VERTEX_SHADER_ARB:\n");
+      for (i = 0; vertex_limits[i].token; i++) {
+         glGetIntegerv(vertex_limits[i].token, max);
+         if (glGetError() == GL_NO_ERROR) {
+            printf("        %s = %d\n", vertex_limits[i].name, max[0]);
+         }
+      }
+   }
+#endif
+#if defined(GL_ARB_fragment_shader)
+   if (target == GL_FRAGMENT_SHADER_ARB) {
+      printf("    GL_FRAGMENT_SHADER_ARB:\n");
+      for (i = 0; fragment_limits[i].token; i++) {
+         glGetIntegerv(fragment_limits[i].token, max);
+         if (glGetError() == GL_NO_ERROR) {
+            printf("        %s = %d\n", fragment_limits[i].name, max[0]);
+         }
+      }
+   }
+#endif
+}
+
+
+/**
+ * Print interesting OpenGL implementation limits.
+ */
+static void
+print_limits(const char *extensions)
+{
+   struct token_name {
+      GLuint count;
+      GLenum token;
+      const char *name;
+   };
+   static const struct token_name limits[] = {
+      { 1, GL_MAX_ATTRIB_STACK_DEPTH, "GL_MAX_ATTRIB_STACK_DEPTH" },
+      { 1, GL_MAX_CLIENT_ATTRIB_STACK_DEPTH, "GL_MAX_CLIENT_ATTRIB_STACK_DEPTH" },
+      { 1, GL_MAX_CLIP_PLANES, "GL_MAX_CLIP_PLANES" },
+      { 1, GL_MAX_COLOR_MATRIX_STACK_DEPTH, "GL_MAX_COLOR_MATRIX_STACK_DEPTH" },
+      { 1, GL_MAX_ELEMENTS_VERTICES, "GL_MAX_ELEMENTS_VERTICES" },
+      { 1, GL_MAX_ELEMENTS_INDICES, "GL_MAX_ELEMENTS_INDICES" },
+      { 1, GL_MAX_EVAL_ORDER, "GL_MAX_EVAL_ORDER" },
+      { 1, GL_MAX_LIGHTS, "GL_MAX_LIGHTS" },
+      { 1, GL_MAX_LIST_NESTING, "GL_MAX_LIST_NESTING" },
+      { 1, GL_MAX_MODELVIEW_STACK_DEPTH, "GL_MAX_MODELVIEW_STACK_DEPTH" },
+      { 1, GL_MAX_NAME_STACK_DEPTH, "GL_MAX_NAME_STACK_DEPTH" },
+      { 1, GL_MAX_PIXEL_MAP_TABLE, "GL_MAX_PIXEL_MAP_TABLE" },
+      { 1, GL_MAX_PROJECTION_STACK_DEPTH, "GL_MAX_PROJECTION_STACK_DEPTH" },
+      { 1, GL_MAX_TEXTURE_STACK_DEPTH, "GL_MAX_TEXTURE_STACK_DEPTH" },
+      { 1, GL_MAX_TEXTURE_SIZE, "GL_MAX_TEXTURE_SIZE" },
+      { 1, GL_MAX_3D_TEXTURE_SIZE, "GL_MAX_3D_TEXTURE_SIZE" },
+      { 2, GL_MAX_VIEWPORT_DIMS, "GL_MAX_VIEWPORT_DIMS" },
+      { 2, GL_ALIASED_LINE_WIDTH_RANGE, "GL_ALIASED_LINE_WIDTH_RANGE" },
+      { 2, GL_SMOOTH_LINE_WIDTH_RANGE, "GL_SMOOTH_LINE_WIDTH_RANGE" },
+      { 2, GL_ALIASED_POINT_SIZE_RANGE, "GL_ALIASED_POINT_SIZE_RANGE" },
+      { 2, GL_SMOOTH_POINT_SIZE_RANGE, "GL_SMOOTH_POINT_SIZE_RANGE" },
+#if defined(GL_ARB_texture_cube_map)
+      { 1, GL_MAX_CUBE_MAP_TEXTURE_SIZE_ARB, "GL_MAX_CUBE_MAP_TEXTURE_SIZE_ARB" },
+#endif
+#if defined(GLX_NV_texture_rectangle)
+      { 1, GL_MAX_RECTANGLE_TEXTURE_SIZE_NV, "GL_MAX_RECTANGLE_TEXTURE_SIZE_NV" },
+#endif
+#if defined(GL_ARB_texture_compression)
+      { 1, GL_NUM_COMPRESSED_TEXTURE_FORMATS_ARB, "GL_NUM_COMPRESSED_TEXTURE_FORMATS_ARB" },
+#endif
+#if defined(GL_ARB_multitexture)
+      { 1, GL_MAX_TEXTURE_UNITS_ARB, "GL_MAX_TEXTURE_UNITS_ARB" },
+#endif
+#if defined(GL_EXT_texture_lod_bias)
+      { 1, GL_MAX_TEXTURE_LOD_BIAS_EXT, "GL_MAX_TEXTURE_LOD_BIAS_EXT" },
+#endif
+#if defined(GL_EXT_texture_filter_anisotropic)
+      { 1, GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, "GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT" },
+#endif
+#if defined(GL_ARB_draw_buffers)
+      { 1, GL_MAX_DRAW_BUFFERS_ARB, "GL_MAX_DRAW_BUFFERS_ARB" },
+#endif
+      { 0, (GLenum) 0, NULL }
+   };
+   GLint i, max[2];
+
+   printf("OpenGL limits:\n");
+   for (i = 0; limits[i].count; i++) {
+      glGetIntegerv(limits[i].token, max);
+      if (glGetError() == GL_NO_ERROR) {
+         if (limits[i].count == 1)
+            printf("    %s = %d\n", limits[i].name, max[0]);
+         else /* XXX fix if we ever query something with more than 2 values */
+            printf("    %s = %d, %d\n", limits[i].name, max[0], max[1]);
+      }
+   }
+
+   /* these don't fit into the above mechanism, unfortunately */
+   glGetConvolutionParameteriv(GL_CONVOLUTION_2D, GL_MAX_CONVOLUTION_WIDTH, max);
+   glGetConvolutionParameteriv(GL_CONVOLUTION_2D, GL_MAX_CONVOLUTION_HEIGHT, max+1);
+   if (glGetError() == GL_NONE) {
+      printf("    GL_MAX_CONVOLUTION_WIDTH/HEIGHT = %d, %d\n", max[0], max[1]);
+   }
+
+#if defined(GL_ARB_vertex_program)
+   if (strstr(extensions, "GL_ARB_vertex_program")) {
+      print_program_limits(GL_VERTEX_PROGRAM_ARB);
+   }
+#endif
+#if defined(GL_ARB_fragment_program)
+   if (strstr(extensions, "GL_ARB_fragment_program")) {
+      print_program_limits(GL_FRAGMENT_PROGRAM_ARB);
+   }
+#endif
+#if defined(GL_ARB_vertex_shader)
+   if (strstr(extensions, "GL_ARB_vertex_shader")) {
+      print_shader_limits(GL_VERTEX_SHADER_ARB);
+   }
+#endif
+#if defined(GL_ARB_fragment_shader)
+   if (strstr(extensions, "GL_ARB_fragment_shader")) {
+      print_shader_limits(GL_FRAGMENT_SHADER_ARB);
+   }
+#endif
+}
+
+
+static void
+print_screen_info(Display *dpy, int scrnum, Bool allowDirect, GLboolean limits)
+{
+   Window win;
+   int attribSingle[] = {
+      GLX_RGBA,
+      GLX_RED_SIZE, 1,
+      GLX_GREEN_SIZE, 1,
+      GLX_BLUE_SIZE, 1,
+      None };
+   int attribDouble[] = {
+      GLX_RGBA,
+      GLX_RED_SIZE, 1,
+      GLX_GREEN_SIZE, 1,
+      GLX_BLUE_SIZE, 1,
+      GLX_DOUBLEBUFFER,
+      None };
+
+   XSetWindowAttributes attr;
+   unsigned long mask;
+   Window root;
+   GLXContext ctx;
+   XVisualInfo *visinfo;
+   int width = 100, height = 100;
+
+   root = RootWindow(dpy, scrnum);
+
+   visinfo = glXChooseVisual(dpy, scrnum, attribSingle);
+   if (!visinfo) {
+      visinfo = glXChooseVisual(dpy, scrnum, attribDouble);
+      if (!visinfo) {
+         fprintf(stderr, "Error: couldn't find RGB GLX visual\n");
+         return;
+      }
+   }
+
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   attr.colormap = XCreateColormap(dpy, root, visinfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+   win = XCreateWindow(dpy, root, 0, 0, width, height,
+		       0, visinfo->depth, InputOutput,
+		       visinfo->visual, mask, &attr);
+
+   ctx = glXCreateContext( dpy, visinfo, NULL, allowDirect );
+   if (!ctx) {
+      fprintf(stderr, "Error: glXCreateContext failed\n");
+      XFree(visinfo);
+      XDestroyWindow(dpy, win);
+      return;
+   }
+
+   if (glXMakeCurrent(dpy, win, ctx)) {
+      const char *serverVendor = glXQueryServerString(dpy, scrnum, GLX_VENDOR);
+      const char *serverVersion = glXQueryServerString(dpy, scrnum, GLX_VERSION);
+      const char *serverExtensions = glXQueryServerString(dpy, scrnum, GLX_EXTENSIONS);
+      const char *clientVendor = glXGetClientString(dpy, GLX_VENDOR);
+      const char *clientVersion = glXGetClientString(dpy, GLX_VERSION);
+      const char *clientExtensions = glXGetClientString(dpy, GLX_EXTENSIONS);
+      const char *glxExtensions = glXQueryExtensionsString(dpy, scrnum);
+      const char *glVendor = (const char *) glGetString(GL_VENDOR);
+      const char *glRenderer = (const char *) glGetString(GL_RENDERER);
+      const char *glVersion = (const char *) glGetString(GL_VERSION);
+      const char *glExtensions = (const char *) glGetString(GL_EXTENSIONS);
+      int glxVersionMajor;
+      int glxVersionMinor;
+      char *displayName = NULL;
+      char *colon = NULL, *period = NULL;
+      
+      if (! glXQueryVersion( dpy, & glxVersionMajor, & glxVersionMinor )) {
+         fprintf(stderr, "Error: glXQueryVersion failed\n");
+         exit(1);
+      }
+
+      /* Strip the screen number from the display name, if present. */
+      if (!(displayName = (char *) malloc(strlen(DisplayString(dpy)) + 1))) {
+         fprintf(stderr, "Error: malloc() failed\n");
+         exit(1);
+      }
+      strcpy(displayName, DisplayString(dpy));
+      colon = strrchr(displayName, ':');
+      if (colon) {
+         period = strchr(colon, '.');
+         if (period)
+            *period = '\0';
+      }
+      printf("display: %s  screen: %d\n", displayName, scrnum);
+      free(displayName);
+      printf("direct rendering: %s\n", glXIsDirect(dpy, ctx) ? "Yes" : "No");
+      printf("server glx vendor string: %s\n", serverVendor);
+      printf("server glx version string: %s\n", serverVersion);
+      printf("server glx extensions:\n");
+      print_extension_list(serverExtensions);
+      printf("client glx vendor string: %s\n", clientVendor);
+      printf("client glx version string: %s\n", clientVersion);
+      printf("client glx extensions:\n");
+      print_extension_list(clientExtensions);
+      printf("GLX version: %u.%u\n", glxVersionMajor, glxVersionMinor);
+      printf("GLX extensions:\n");
+      print_extension_list(glxExtensions);
+      printf("OpenGL vendor string: %s\n", glVendor);
+      printf("OpenGL renderer string: %s\n", glRenderer);
+      printf("OpenGL version string: %s\n", glVersion);
+      printf("OpenGL extensions:\n");
+      print_extension_list(glExtensions);
+      if (limits)
+         print_limits(glExtensions);
+   }
+   else {
+      fprintf(stderr, "Error: glXMakeCurrent failed\n");
+   }
+
+   glXDestroyContext(dpy, ctx);
+   XFree(visinfo);
+   XDestroyWindow(dpy, win);
+}
+
+
+static const char *
+visual_class_name(int cls)
+{
+   switch (cls) {
+      case StaticColor:
+         return "StaticColor";
+      case PseudoColor:
+         return "PseudoColor";
+      case StaticGray:
+         return "StaticGray";
+      case GrayScale:
+         return "GrayScale";
+      case TrueColor:
+         return "TrueColor";
+      case DirectColor:
+         return "DirectColor";
+      default:
+         return "";
+   }
+}
+
+
+static const char *
+visual_class_abbrev(int cls)
+{
+   switch (cls) {
+      case StaticColor:
+         return "sc";
+      case PseudoColor:
+         return "pc";
+      case StaticGray:
+         return "sg";
+      case GrayScale:
+         return "gs";
+      case TrueColor:
+         return "tc";
+      case DirectColor:
+         return "dc";
+      default:
+         return "";
+   }
+}
+
+
+static void
+get_visual_attribs(Display *dpy, XVisualInfo *vInfo,
+                   struct visual_attribs *attribs)
+{
+   const char *ext = glXQueryExtensionsString(dpy, vInfo->screen);
+
+   memset(attribs, 0, sizeof(struct visual_attribs));
+
+   attribs->id = vInfo->visualid;
+#if defined(__cplusplus) || defined(c_plusplus)
+   attribs->klass = vInfo->c_class;
+#else
+   attribs->klass = vInfo->class;
+#endif
+   attribs->depth = vInfo->depth;
+   attribs->redMask = vInfo->red_mask;
+   attribs->greenMask = vInfo->green_mask;
+   attribs->blueMask = vInfo->blue_mask;
+   attribs->colormapSize = vInfo->colormap_size;
+   attribs->bitsPerRGB = vInfo->bits_per_rgb;
+
+   if (glXGetConfig(dpy, vInfo, GLX_USE_GL, &attribs->supportsGL) != 0)
+      return;
+   glXGetConfig(dpy, vInfo, GLX_BUFFER_SIZE, &attribs->bufferSize);
+   glXGetConfig(dpy, vInfo, GLX_LEVEL, &attribs->level);
+   glXGetConfig(dpy, vInfo, GLX_RGBA, &attribs->rgba);
+   glXGetConfig(dpy, vInfo, GLX_DOUBLEBUFFER, &attribs->doubleBuffer);
+   glXGetConfig(dpy, vInfo, GLX_STEREO, &attribs->stereo);
+   glXGetConfig(dpy, vInfo, GLX_AUX_BUFFERS, &attribs->auxBuffers);
+   glXGetConfig(dpy, vInfo, GLX_RED_SIZE, &attribs->redSize);
+   glXGetConfig(dpy, vInfo, GLX_GREEN_SIZE, &attribs->greenSize);
+   glXGetConfig(dpy, vInfo, GLX_BLUE_SIZE, &attribs->blueSize);
+   glXGetConfig(dpy, vInfo, GLX_ALPHA_SIZE, &attribs->alphaSize);
+   glXGetConfig(dpy, vInfo, GLX_DEPTH_SIZE, &attribs->depthSize);
+   glXGetConfig(dpy, vInfo, GLX_STENCIL_SIZE, &attribs->stencilSize);
+   glXGetConfig(dpy, vInfo, GLX_ACCUM_RED_SIZE, &attribs->accumRedSize);
+   glXGetConfig(dpy, vInfo, GLX_ACCUM_GREEN_SIZE, &attribs->accumGreenSize);
+   glXGetConfig(dpy, vInfo, GLX_ACCUM_BLUE_SIZE, &attribs->accumBlueSize);
+   glXGetConfig(dpy, vInfo, GLX_ACCUM_ALPHA_SIZE, &attribs->accumAlphaSize);
+
+   /* get transparent pixel stuff */
+   glXGetConfig(dpy, vInfo,GLX_TRANSPARENT_TYPE, &attribs->transparentType);
+   if (attribs->transparentType == GLX_TRANSPARENT_RGB) {
+     glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_RED_VALUE, &attribs->transparentRedValue);
+     glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_GREEN_VALUE, &attribs->transparentGreenValue);
+     glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_BLUE_VALUE, &attribs->transparentBlueValue);
+     glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_ALPHA_VALUE, &attribs->transparentAlphaValue);
+   }
+   else if (attribs->transparentType == GLX_TRANSPARENT_INDEX) {
+     glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_INDEX_VALUE, &attribs->transparentIndexValue);
+   }
+
+   /* multisample attribs */
+#ifdef GLX_ARB_multisample
+   if (ext && strstr(ext, "GLX_ARB_multisample") == 0) {
+      glXGetConfig(dpy, vInfo, GLX_SAMPLE_BUFFERS_ARB, &attribs->numMultisample);
+      glXGetConfig(dpy, vInfo, GLX_SAMPLES_ARB, &attribs->numSamples);
+   }
+#endif
+   else {
+      attribs->numSamples = 0;
+      attribs->numMultisample = 0;
+   }
+
+#if defined(GLX_EXT_visual_rating)
+   if (ext && strstr(ext, "GLX_EXT_visual_rating")) {
+      glXGetConfig(dpy, vInfo, GLX_VISUAL_CAVEAT_EXT, &attribs->visualCaveat);
+   }
+   else {
+      attribs->visualCaveat = GLX_NONE_EXT;
+   }
+#else
+   attribs->visualCaveat = 0;
+#endif
+}
+
+
+static void
+print_visual_attribs_verbose(const struct visual_attribs *attribs)
+{
+   printf("Visual ID: %x  depth=%d  class=%s\n",
+          attribs->id, attribs->depth, visual_class_name(attribs->klass));
+   printf("    bufferSize=%d level=%d renderType=%s doubleBuffer=%d stereo=%d\n",
+          attribs->bufferSize, attribs->level, attribs->rgba ? "rgba" : "ci",
+          attribs->doubleBuffer, attribs->stereo);
+   printf("    rgba: redSize=%d greenSize=%d blueSize=%d alphaSize=%d\n",
+          attribs->redSize, attribs->greenSize,
+          attribs->blueSize, attribs->alphaSize);
+   printf("    auxBuffers=%d depthSize=%d stencilSize=%d\n",
+          attribs->auxBuffers, attribs->depthSize, attribs->stencilSize);
+   printf("    accum: redSize=%d greenSize=%d blueSize=%d alphaSize=%d\n",
+          attribs->accumRedSize, attribs->accumGreenSize,
+          attribs->accumBlueSize, attribs->accumAlphaSize);
+   printf("    multiSample=%d  multiSampleBuffers=%d\n",
+          attribs->numSamples, attribs->numMultisample);
+#ifdef GLX_EXT_visual_rating
+   if (attribs->visualCaveat == GLX_NONE_EXT || attribs->visualCaveat == 0)
+      printf("    visualCaveat=None\n");
+   else if (attribs->visualCaveat == GLX_SLOW_VISUAL_EXT)
+      printf("    visualCaveat=Slow\n");
+   else if (attribs->visualCaveat == GLX_NON_CONFORMANT_VISUAL_EXT)
+      printf("    visualCaveat=Nonconformant\n");
+#endif
+   if (attribs->transparentType == GLX_NONE) {
+     printf("    Opaque.\n");
+   }
+   else if (attribs->transparentType == GLX_TRANSPARENT_RGB) {
+     printf("    Transparent RGB: Red=%d Green=%d Blue=%d Alpha=%d\n",attribs->transparentRedValue,attribs->transparentGreenValue,attribs->transparentBlueValue,attribs->transparentAlphaValue);
+   }
+   else if (attribs->transparentType == GLX_TRANSPARENT_INDEX) {
+     printf("    Transparent index=%d\n",attribs->transparentIndexValue);
+   }
+}
+
+
+static void
+print_visual_attribs_short_header(void)
+{
+ printf("   visual  x  bf lv rg d st colorbuffer ax dp st accumbuffer  ms  cav\n");
+ printf(" id dep cl sp sz l  ci b ro  r  g  b  a bf th cl  r  g  b  a ns b eat\n");
+ printf("----------------------------------------------------------------------\n");
+}
+
+
+static void
+print_visual_attribs_short(const struct visual_attribs *attribs)
+{
+   char *caveat = NULL;
+#ifdef GLX_EXT_visual_rating
+   if (attribs->visualCaveat == GLX_NONE_EXT || attribs->visualCaveat == 0)
+      caveat = "None";
+   else if (attribs->visualCaveat == GLX_SLOW_VISUAL_EXT)
+      caveat = "Slow";
+   else if (attribs->visualCaveat == GLX_NON_CONFORMANT_VISUAL_EXT)
+      caveat = "Ncon";
+   else
+      caveat = "None";
+#else
+   caveat = "None";
+#endif 
+
+   printf("0x%2x %2d %2s %2d %2d %2d %1s %2s %2s %2d %2d %2d %2d %2d %2d %2d",
+          attribs->id,
+          attribs->depth,
+          visual_class_abbrev(attribs->klass),
+          attribs->transparentType != GLX_NONE,
+          attribs->bufferSize,
+          attribs->level,
+          attribs->rgba ? "r" : "c",
+          attribs->doubleBuffer ? "y" : ".",
+          attribs->stereo ? "y" : ".",
+          attribs->redSize, attribs->greenSize,
+          attribs->blueSize, attribs->alphaSize,
+          attribs->auxBuffers,
+          attribs->depthSize,
+          attribs->stencilSize
+          );
+
+   printf(" %2d %2d %2d %2d %2d %1d %s\n",
+          attribs->accumRedSize, attribs->accumGreenSize,
+          attribs->accumBlueSize, attribs->accumAlphaSize,
+          attribs->numSamples, attribs->numMultisample,
+          caveat
+          );
+}
+
+
+static void
+print_visual_attribs_long_header(void)
+{
+ printf("Vis  Vis   Visual Trans  buff lev render DB ste  r   g   b   a  aux dep ste  accum buffers  MS   MS\n");
+ printf(" ID Depth   Type  parent size el   type     reo sz  sz  sz  sz  buf th  ncl  r   g   b   a  num bufs\n");
+ printf("----------------------------------------------------------------------------------------------------\n");
+}
+
+
+static void
+print_visual_attribs_long(const struct visual_attribs *attribs)
+{
+   printf("0x%2x %2d %-11s %2d     %2d %2d  %4s %3d %3d %3d %3d %3d %3d",
+          attribs->id,
+          attribs->depth,
+          visual_class_name(attribs->klass),
+          attribs->transparentType != GLX_NONE,
+          attribs->bufferSize,
+          attribs->level,
+          attribs->rgba ? "rgba" : "ci  ",
+          attribs->doubleBuffer,
+          attribs->stereo,
+          attribs->redSize, attribs->greenSize,
+          attribs->blueSize, attribs->alphaSize
+          );
+
+   printf(" %3d %4d %2d %3d %3d %3d %3d  %2d  %2d\n",
+          attribs->auxBuffers,
+          attribs->depthSize,
+          attribs->stencilSize,
+          attribs->accumRedSize, attribs->accumGreenSize,
+          attribs->accumBlueSize, attribs->accumAlphaSize,
+          attribs->numSamples, attribs->numMultisample
+          );
+}
+
+
+static void
+print_visual_info(Display *dpy, int scrnum, InfoMode mode)
+{
+   XVisualInfo theTemplate;
+   XVisualInfo *visuals;
+   int numVisuals;
+   long mask;
+   int i;
+
+   /* get list of all visuals on this screen */
+   theTemplate.screen = scrnum;
+   mask = VisualScreenMask;
+   visuals = XGetVisualInfo(dpy, mask, &theTemplate, &numVisuals);
+
+   if (mode == Verbose) {
+      for (i = 0; i < numVisuals; i++) {
+         struct visual_attribs attribs;
+         get_visual_attribs(dpy, &visuals[i], &attribs);
+         print_visual_attribs_verbose(&attribs);
+      }
+   }
+   else if (mode == Normal) {
+      print_visual_attribs_short_header();
+      for (i = 0; i < numVisuals; i++) {
+         struct visual_attribs attribs;
+         get_visual_attribs(dpy, &visuals[i], &attribs);
+         print_visual_attribs_short(&attribs);
+      }
+   }
+   else if (mode == Wide) {
+      print_visual_attribs_long_header();
+      for (i = 0; i < numVisuals; i++) {
+         struct visual_attribs attribs;
+         get_visual_attribs(dpy, &visuals[i], &attribs);
+         print_visual_attribs_long(&attribs);
+      }
+   }
+
+   XFree(visuals);
+}
+
+
+/*
+ * Stand-alone Mesa doesn't really implement the GLX protocol so it
+ * doesn't really know the GLX attributes associated with an X visual.
+ * The first time a visual is presented to Mesa's pseudo-GLX it
+ * attaches ancilliary buffers to it (like depth and stencil).
+ * But that usually only works if glXChooseVisual is used.
+ * This function calls glXChooseVisual() to sort of "prime the pump"
+ * for Mesa's GLX so that the visuals that get reported actually
+ * reflect what applications will see.
+ * This has no effect when using true GLX.
+ */
+static void
+mesa_hack(Display *dpy, int scrnum)
+{
+   static int attribs[] = {
+      GLX_RGBA,
+      GLX_RED_SIZE, 1,
+      GLX_GREEN_SIZE, 1,
+      GLX_BLUE_SIZE, 1,
+      GLX_DEPTH_SIZE, 1,
+      GLX_STENCIL_SIZE, 1,
+      GLX_ACCUM_RED_SIZE, 1,
+      GLX_ACCUM_GREEN_SIZE, 1,
+      GLX_ACCUM_BLUE_SIZE, 1,
+      GLX_ACCUM_ALPHA_SIZE, 1,
+      GLX_DOUBLEBUFFER,
+      None
+   };
+   XVisualInfo *visinfo;
+
+   visinfo = glXChooseVisual(dpy, scrnum, attribs);
+   if (visinfo)
+      XFree(visinfo);
+}
+
+
+/*
+ * Examine all visuals to find the so-called best one.
+ * We prefer deepest RGBA buffer with depth, stencil and accum
+ * that has no caveats.
+ */
+static int
+find_best_visual(Display *dpy, int scrnum)
+{
+   XVisualInfo theTemplate;
+   XVisualInfo *visuals;
+   int numVisuals;
+   long mask;
+   int i;
+   struct visual_attribs bestVis;
+
+   /* get list of all visuals on this screen */
+   theTemplate.screen = scrnum;
+   mask = VisualScreenMask;
+   visuals = XGetVisualInfo(dpy, mask, &theTemplate, &numVisuals);
+
+   /* init bestVis with first visual info */
+   get_visual_attribs(dpy, &visuals[0], &bestVis);
+
+   /* try to find a "better" visual */
+   for (i = 1; i < numVisuals; i++) {
+      struct visual_attribs vis;
+
+      get_visual_attribs(dpy, &visuals[i], &vis);
+
+      /* always skip visuals with caveats */
+      if (vis.visualCaveat != GLX_NONE_EXT)
+         continue;
+
+      /* see if this vis is better than bestVis */
+      if ((!bestVis.supportsGL && vis.supportsGL) ||
+          (bestVis.visualCaveat != GLX_NONE_EXT) ||
+          (!bestVis.rgba && vis.rgba) ||
+          (!bestVis.doubleBuffer && vis.doubleBuffer) ||
+          (bestVis.redSize < vis.redSize) ||
+          (bestVis.greenSize < vis.greenSize) ||
+          (bestVis.blueSize < vis.blueSize) ||
+          (bestVis.alphaSize < vis.alphaSize) ||
+          (bestVis.depthSize < vis.depthSize) ||
+          (bestVis.stencilSize < vis.stencilSize) ||
+          (bestVis.accumRedSize < vis.accumRedSize)) {
+         /* found a better visual */
+         bestVis = vis;
+      }
+   }
+
+   XFree(visuals);
+
+   return bestVis.id;
+}
+
+
+static void
+usage(void)
+{
+   printf("Usage: glxinfo [-v] [-t] [-h] [-i] [-b] [-display <dname>]\n");
+   printf("\t-v: Print visuals info in verbose form.\n");
+   printf("\t-t: Print verbose table.\n");
+   printf("\t-display <dname>: Print GLX visuals on specified server.\n");
+   printf("\t-h: This information.\n");
+   printf("\t-i: Force an indirect rendering context.\n");
+   printf("\t-b: Find the 'best' visual and print it's number.\n");
+   printf("\t-l: Print interesting OpenGL limits.\n");
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   char *displayName = NULL;
+   Display *dpy;
+   int numScreens, scrnum;
+   InfoMode mode = Normal;
+   GLboolean findBest = GL_FALSE;
+   GLboolean limits = GL_FALSE;
+   Bool allowDirect = True;
+   int i;
+
+   for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "-display") == 0 && i + 1 < argc) {
+         displayName = argv[i + 1];
+         i++;
+      }
+      else if (strcmp(argv[i], "-t") == 0) {
+         mode = Wide;
+      }
+      else if (strcmp(argv[i], "-v") == 0) {
+         mode = Verbose;
+      }
+      else if (strcmp(argv[i], "-b") == 0) {
+         findBest = GL_TRUE;
+      }
+      else if (strcmp(argv[i], "-i") == 0) {
+         allowDirect = False;
+      }
+      else if (strcmp(argv[i], "-l") == 0) {
+         limits = GL_TRUE;
+      }
+      else if (strcmp(argv[i], "-h") == 0) {
+         usage();
+         return 0;
+      }
+      else {
+         printf("Unknown option `%s'\n", argv[i]);
+         usage();
+         return 0;
+      }
+   }
+
+   dpy = XOpenDisplay(displayName);
+   if (!dpy) {
+      fprintf(stderr, "Error: unable to open display %s\n", displayName);
+      return -1;
+   }
+
+   if (findBest) {
+      int b;
+      mesa_hack(dpy, 0);
+      b = find_best_visual(dpy, 0);
+      printf("%d\n", b);
+   }
+   else {
+      numScreens = ScreenCount(dpy);
+      print_display_info(dpy);
+      for (scrnum = 0; scrnum < numScreens; scrnum++) {
+         mesa_hack(dpy, scrnum);
+         print_screen_info(dpy, scrnum, allowDirect, limits);
+         printf("\n");
+         print_visual_info(dpy, scrnum, mode);
+         if (scrnum + 1 < numScreens)
+            printf("\n\n");
+      }
+   }
+
+   XCloseDisplay(dpy);
+
+   return 0;
+}
diff --git a/progs/xdemos/glxpbdemo.c b/progs/xdemos/glxpbdemo.c
new file mode 100644
index 00000000000..91fd30dcaa6
--- /dev/null
+++ b/progs/xdemos/glxpbdemo.c
@@ -0,0 +1,430 @@
+
+/*
+ * This program demonstrates how to do "off-screen" rendering using
+ * the GLX pixel buffer extension.
+ *
+ * Written by Brian Paul for the "OpenGL and Window System Integration"
+ * course presented at SIGGRAPH '97.  Updated on 5 October 2002.
+ *
+ * Updated on 31 January 2004 to use native GLX by
+ * Andrew P. Lentvorski, Jr. <[email protected]>
+ *
+ * Usage:
+ *   glxpbdemo width height imgfile
+ * Where:
+ *   width is the width, in pixels, of the image to generate.
+ *   height is the height, in pixels, of the image to generate.
+ *   imgfile is the name of the PPM image file to write.
+ *
+ *
+ * This demo draws 3-D boxes with random orientation.
+ *
+ * On machines such as the SGI Indigo you may have to reconfigure your
+ * display/X server to enable pbuffers.  Look in the /usr/gfx/ucode/MGRAS/vof/
+ * directory for display configurations with the _pbuf suffix.  Use
+ * setmon -x <vof> to configure your X server and display for pbuffers.
+ *
+ * O2 systems seem to support pbuffers well.
+ *
+ */
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <X11/Xlib.h>
+#include <GL/glx.h>
+
+/* Some ugly global vars */
+static GLXFBConfig gFBconfig = 0;
+static Display *gDpy = NULL;
+static int gScreen = 0;
+static GLXPbuffer gPBuffer = 0;
+static int gWidth, gHeight;
+
+
+/*
+ * Test for appropriate version of GLX to run this program
+ * Input:  dpy - the X display
+ *         screen - screen number
+ * Return:  0 = GLX not available.
+ *          1 = GLX available.
+ */
+static int
+RuntimeQueryGLXVersion(Display *dpy, int screen)
+{
+#if defined(GLX_VERSION_1_3) || defined(GLX_VERSION_1_4)
+   char *glxversion;
+ 
+   glxversion = (char *) glXGetClientString(dpy, GLX_VERSION);
+   if (!(strstr(glxversion, "1.3") || strstr(glxversion, "1.4")))
+      return 0;
+
+   glxversion = (char *) glXQueryServerString(dpy, screen, GLX_VERSION);
+   if (!(strstr(glxversion, "1.3") || strstr(glxversion, "1.4")))
+      return 0;
+
+   return 1;
+#else
+   return 0;
+#endif
+}
+
+
+
+/*
+ * Create the pbuffer and return a GLXPbuffer handle.
+ */
+static GLXPbuffer
+MakePbuffer( Display *dpy, int screen, int width, int height )
+{
+   GLXFBConfig *fbConfigs;
+   GLXFBConfig chosenFBConfig;
+   GLXPbuffer pBuffer = None;
+
+   int nConfigs;
+   int fbconfigid;
+
+   int fbAttribs[] = {
+      GLX_RENDER_TYPE, GLX_RGBA_BIT,
+      GLX_DEPTH_SIZE, 1,
+      GLX_DRAWABLE_TYPE, GLX_PIXMAP_BIT | GLX_PBUFFER_BIT,
+      None
+   };
+
+   int pbAttribs[] = {
+      GLX_PBUFFER_WIDTH, 0,
+      GLX_PBUFFER_HEIGHT, 0,
+      GLX_LARGEST_PBUFFER, False,
+      GLX_PRESERVED_CONTENTS, False,
+      None
+   };
+
+   pbAttribs[1] = width;
+   pbAttribs[3] = height;
+
+   fbConfigs = glXChooseFBConfig(dpy, screen, fbAttribs, &nConfigs);
+
+   if (0 == nConfigs || !fbConfigs) {
+      printf("Error: glxChooseFBConfig failed\n");
+      XCloseDisplay(dpy);
+      return 0;
+   }
+
+   chosenFBConfig = fbConfigs[0];
+
+   glXGetFBConfigAttrib(dpy, chosenFBConfig, GLX_FBCONFIG_ID, &fbconfigid);
+   printf("Chose 0x%x as fbconfigid\n", fbconfigid);
+
+   /* Create the pbuffer using first fbConfig in the list that works. */
+   pBuffer = glXCreatePbuffer(dpy, chosenFBConfig, pbAttribs);
+
+   if (pBuffer) {
+      gFBconfig = chosenFBConfig;
+      gWidth = width;
+      gHeight = height;
+   }
+
+   XFree(fbConfigs);
+
+   return pBuffer;
+}
+
+
+
+/*
+ * Do all the X / GLX setup stuff.
+ */
+static int
+Setup(int width, int height)
+{
+#if defined(GLX_VERSION_1_3) || defined(GLX_VERSION_1_4)
+   GLXContext glCtx;
+
+   /* Open the X display */
+   gDpy = XOpenDisplay(NULL);
+   if (!gDpy) {
+      printf("Error: couldn't open default X display.\n");
+      return 0;
+   }
+
+   /* Get default screen */
+   gScreen = DefaultScreen(gDpy);
+
+   /* Test that GLX is available */
+   if (!RuntimeQueryGLXVersion(gDpy, gScreen)) {
+     printf("Error: GLX 1.3 or 1.4 not available\n");
+     XCloseDisplay(gDpy);
+     return 0;
+   }
+
+   /* Create Pbuffer */
+   gPBuffer = MakePbuffer( gDpy, gScreen, width, height );
+   if (gPBuffer==None) {
+      printf("Error: couldn't create pbuffer\n");
+      XCloseDisplay(gDpy);
+      return 0;
+   }
+
+   /* Create GLX context */
+   glCtx = glXCreateNewContext(gDpy, gFBconfig, GLX_RGBA_TYPE, NULL, True);
+   if (glCtx) {
+      if (!glXIsDirect(gDpy, glCtx)) {
+         printf("Warning: using indirect GLXContext\n");
+      }
+   }
+   else {
+      printf("Error: Couldn't create GLXContext\n");
+      XCloseDisplay(gDpy);
+      return 0;
+   }
+
+   /* Bind context to pbuffer */
+   if (!glXMakeCurrent(gDpy, gPBuffer, glCtx)) {
+      printf("Error: glXMakeCurrent failed\n");
+      XCloseDisplay(gDpy);
+      return 0;
+   }
+
+   return 1;  /* Success!! */
+#else
+   printf("Error: GLX version 1.3 or 1.4 not available at compile time\n");
+   return 0;
+#endif
+}
+
+
+
+/* One-time GL setup */
+static void
+InitGL(void)
+{
+   static GLfloat pos[4] = {0.0, 0.0, 10.0, 0.0};
+   glEnable(GL_LIGHTING);
+   glEnable(GL_LIGHT0);
+   glLightfv(GL_LIGHT0, GL_POSITION, pos);
+   glEnable(GL_NORMALIZE);
+   glEnable(GL_DEPTH_TEST);
+   glEnable(GL_CULL_FACE);
+
+   glViewport(0, 0, gWidth, gHeight);
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -15.0 );
+
+}
+
+
+/* Return random float in [0,1] */
+static float
+Random(void)
+{
+   int i = rand();
+   return (float) (i % 1000) / 1000.0;
+}
+
+
+static void
+RandomColor(void)
+{
+   GLfloat c[4];
+   c[0] = Random();
+   c[1] = Random();
+   c[2] = Random();
+   c[3] = 1.0;
+   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, c);
+}
+
+
+/* This function borrowed from Mark Kilgard's GLUT */
+static void
+drawBox(GLfloat x0, GLfloat x1, GLfloat y0, GLfloat y1,
+        GLfloat z0, GLfloat z1, GLenum type)
+{
+  static GLfloat n[6][3] =
+  {
+    {-1.0, 0.0, 0.0},
+    {0.0, 1.0, 0.0},
+    {1.0, 0.0, 0.0},
+    {0.0, -1.0, 0.0},
+    {0.0, 0.0, 1.0},
+    {0.0, 0.0, -1.0}
+  };
+  static GLint faces[6][4] =
+  {
+    {0, 1, 2, 3},
+    {3, 2, 6, 7},
+    {7, 6, 5, 4},
+    {4, 5, 1, 0},
+    {5, 6, 2, 1},
+    {7, 4, 0, 3}
+  };
+  GLfloat v[8][3], tmp;
+  GLint i;
+
+  if (x0 > x1) {
+    tmp = x0;
+    x0 = x1;
+    x1 = tmp;
+  }
+  if (y0 > y1) {
+    tmp = y0;
+    y0 = y1;
+    y1 = tmp;
+  }
+  if (z0 > z1) {
+    tmp = z0;
+    z0 = z1;
+    z1 = tmp;
+  }
+  v[0][0] = v[1][0] = v[2][0] = v[3][0] = x0;
+  v[4][0] = v[5][0] = v[6][0] = v[7][0] = x1;
+  v[0][1] = v[1][1] = v[4][1] = v[5][1] = y0;
+  v[2][1] = v[3][1] = v[6][1] = v[7][1] = y1;
+  v[0][2] = v[3][2] = v[4][2] = v[7][2] = z0;
+  v[1][2] = v[2][2] = v[5][2] = v[6][2] = z1;
+
+  for (i = 0; i < 6; i++) {
+    glBegin(type);
+    glNormal3fv(&n[i][0]);
+    glVertex3fv(&v[faces[i][0]][0]);
+    glVertex3fv(&v[faces[i][1]][0]);
+    glVertex3fv(&v[faces[i][2]][0]);
+    glVertex3fv(&v[faces[i][3]][0]);
+    glEnd();
+  }
+}
+
+
+
+/* Render a scene */
+static void
+Render(void)
+{
+   int NumBoxes = 100;
+   int i;
+
+   InitGL();
+   glClearColor(0.2, 0.2, 0.9, 0.0);
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   for (i=0;i<NumBoxes;i++) {
+      float tx = -2.0 + 4.0 * Random();
+      float ty = -2.0 + 4.0 * Random();
+      float tz =  4.0 - 16.0 * Random();
+      float sx = 0.1 + Random() * 0.4;
+      float sy = 0.1 + Random() * 0.4;
+      float sz = 0.1 + Random() * 0.4;
+      float rx = Random();
+      float ry = Random();
+      float rz = Random();
+      float ra = Random() * 360.0;
+      glPushMatrix();
+      glTranslatef(tx, ty, tz);
+      glRotatef(ra, rx, ry, rz);
+      glScalef(sx, sy, sz);
+      RandomColor();
+      drawBox(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0, GL_POLYGON);
+      glPopMatrix();
+   }
+
+   glFinish();
+}
+
+
+
+static void
+WriteFile(const char *filename)
+{
+   FILE *f;
+   GLubyte *image;
+   int i;
+
+   image = malloc(gWidth * gHeight * 3 * sizeof(GLubyte));
+   if (!image) {
+      printf("Error: couldn't allocate image buffer\n");
+      return;
+   }
+
+   glPixelStorei(GL_PACK_ALIGNMENT, 1);
+   glReadPixels(0, 0, gWidth, gHeight, GL_RGB, GL_UNSIGNED_BYTE, image);
+
+   f = fopen(filename, "w");
+   if (!f) {
+      printf("Couldn't open image file: %s\n", filename);
+      return;
+   }
+   fprintf(f,"P6\n");
+   fprintf(f,"# ppm-file created by %s\n", "trdemo2");
+   fprintf(f,"%i %i\n", gWidth, gHeight);
+   fprintf(f,"255\n");
+   fclose(f);
+   f = fopen(filename, "ab");  /* now append binary data */
+   if (!f) {
+      printf("Couldn't append to image file: %s\n", filename);
+      return;
+   }
+
+   for (i=0;i<gHeight;i++) {
+      GLubyte *rowPtr;
+      /* Remember, OpenGL images are bottom to top.  Have to reverse. */
+      rowPtr = image + (gHeight-1-i) * gWidth*3;
+      fwrite(rowPtr, 1, gWidth*3, f);
+   }
+
+   fclose(f);
+   free(image);
+
+   printf("Wrote %d by %d image file: %s\n", gWidth, gHeight, filename);
+}
+
+
+
+/*
+ * Print message describing command line parameters.
+ */
+static void
+Usage(const char *appName)
+{
+   printf("Usage:\n");
+   printf("  %s width height imgfile\n", appName);
+   printf("Where imgfile is a ppm file\n");
+}
+
+
+
+int
+main(int argc, char *argv[])
+{
+   if (argc!=4) {
+      Usage(argv[0]);
+   }
+   else {
+      int width = atoi(argv[1]);
+      int height = atoi(argv[2]);
+      char *fileName = argv[3];
+      if (width<=0) {
+         printf("Error: width parameter must be at least 1.\n");
+         return 1;
+      }
+      if (height<=0) {
+         printf("Error: height parameter must be at least 1.\n");
+         return 1;
+      }
+      if (!Setup(width, height)) {
+         return 1;
+      }
+
+      printf("Setup completed\n");
+      Render();
+      printf("Render completed.\n");
+      WriteFile(fileName);
+      printf("File write completed.\n");
+
+      glXDestroyPbuffer( gDpy, gPBuffer );
+   }
+   return 0;
+}
+
diff --git a/progs/xdemos/glxpixmap.c b/progs/xdemos/glxpixmap.c
new file mode 100644
index 00000000000..9db4df2c8b8
--- /dev/null
+++ b/progs/xdemos/glxpixmap.c
@@ -0,0 +1,186 @@
+
+
+/*
+ * A demonstration of using the GLXPixmap functions.  This program is in
+ * the public domain.
+ *
+ * Brian Paul
+ */
+
+
+#include <GL/gl.h>
+#define GLX_GLXEXT_PROTOTYPES
+#include <GL/glx.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+static GLXContext ctx;
+static XVisualInfo *visinfo;
+static GC gc;
+
+
+
+static Window make_rgb_window( Display *dpy,
+				  unsigned int width, unsigned int height )
+{
+   const int sbAttrib[] = { GLX_RGBA,
+                            GLX_RED_SIZE, 1,
+                            GLX_GREEN_SIZE, 1,
+                            GLX_BLUE_SIZE, 1,
+                            None };
+   const int dbAttrib[] = { GLX_RGBA,
+                            GLX_RED_SIZE, 1,
+                            GLX_GREEN_SIZE, 1,
+                            GLX_BLUE_SIZE, 1,
+                            GLX_DOUBLEBUFFER,
+                            None };
+   int scrnum;
+   XSetWindowAttributes attr;
+   unsigned long mask;
+   Window root;
+   Window win;
+
+   scrnum = DefaultScreen( dpy );
+   root = RootWindow( dpy, scrnum );
+
+   visinfo = glXChooseVisual( dpy, scrnum, (int *) sbAttrib );
+   if (!visinfo) {
+      visinfo = glXChooseVisual( dpy, scrnum, (int *) dbAttrib );
+      if (!visinfo) {
+         printf("Error: couldn't get an RGB visual\n");
+         exit(1);
+      }
+   }
+
+   /* window attributes */
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   /* TODO: share root colormap if possible */
+   attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+
+   win = XCreateWindow( dpy, root, 0, 0, width, height,
+		        0, visinfo->depth, InputOutput,
+		        visinfo->visual, mask, &attr );
+
+   /* make an X GC so we can do XCopyArea later */
+   gc = XCreateGC( dpy, win, 0, NULL );
+
+   /* need indirect context */
+   ctx = glXCreateContext( dpy, visinfo, NULL, False );
+   if (!ctx) {
+      printf("Error: glXCreateContext failed\n");
+      exit(-1);
+   }
+
+   printf("Direct rendering: %s\n", glXIsDirect(dpy, ctx) ? "Yes" : "No");
+
+   return win;
+}
+
+
+static GLXPixmap make_pixmap( Display *dpy, Window win,
+			       unsigned int width, unsigned int height,
+                               Pixmap *pixmap)
+{
+   Pixmap pm;
+   GLXPixmap glxpm;
+   XWindowAttributes attr;
+
+   pm = XCreatePixmap( dpy, win, width, height, visinfo->depth );
+   if (!pm) {
+      printf("Error: XCreatePixmap failed\n");
+      exit(-1);
+   }
+
+   XGetWindowAttributes( dpy, win, &attr );
+
+   /*
+    * IMPORTANT:
+    *   Use the glXCreateGLXPixmapMESA funtion when using Mesa because
+    *   Mesa needs to know the colormap associated with a pixmap in order
+    *   to render correctly.  This is because Mesa allows RGB rendering
+    *   into any kind of visual, not just TrueColor or DirectColor.
+    */
+#ifdef GLX_MESA_pixmap_colormap
+   if (strstr(glXQueryExtensionsString(dpy, 0), "GLX_MESA_pixmap_colormap")) {
+      /* stand-alone Mesa, specify the colormap */
+      glxpm = glXCreateGLXPixmapMESA( dpy, visinfo, pm, attr.colormap );
+   }
+   else {
+      glxpm = glXCreateGLXPixmap( dpy, visinfo, pm );
+   }
+#else
+   /* This will work with Mesa too if the visual is TrueColor or DirectColor */
+   glxpm = glXCreateGLXPixmap( dpy, visinfo, pm );
+#endif
+
+   if (!glxpm) {
+      printf("Error: GLXCreateGLXPixmap failed\n");
+      exit(-1);
+   }
+
+   *pixmap = pm;
+
+   return glxpm;
+}
+
+
+
+static void event_loop( Display *dpy, GLXPixmap pm )
+{
+   XEvent event;
+
+   while (1) {
+      XNextEvent( dpy, &event );
+
+      switch (event.type) {
+	 case Expose:
+	    printf("Redraw\n");
+	    /* copy the image from GLXPixmap to window */
+	    XCopyArea( dpy, pm, event.xany.window,  /* src, dest */
+		       gc, 0, 0, 300, 300,          /* gc, src pos, size */
+		       0, 0 );                      /* dest pos */
+	    break;
+	 case ConfigureNotify:
+	    /* nothing */
+	    break;
+      }
+   }
+}
+
+
+
+int main( int argc, char *argv[] )
+{
+   Display *dpy;
+   Window win;
+   Pixmap pm;
+   GLXPixmap glxpm;
+
+   dpy = XOpenDisplay(NULL);
+
+   win = make_rgb_window( dpy, 300, 300 );
+   glxpm = make_pixmap( dpy, win, 300, 300, &pm );
+
+   glXMakeCurrent( dpy, glxpm, ctx );
+   printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
+
+   /* Render an image into the pixmap */
+   glShadeModel( GL_FLAT );
+   glClearColor( 0.5, 0.5, 0.5, 1.0 );
+   glClear( GL_COLOR_BUFFER_BIT );
+   glViewport( 0, 0, 300, 300 );
+   glOrtho( -1.0, 1.0, -1.0, 1.0, -1.0, 1.0 );
+   glColor3f( 0.0, 1.0, 1.0 );
+   glRectf( -0.75, -0.75, 0.75, 0.75 );
+   glFlush();
+
+   XMapWindow( dpy, win );
+
+   event_loop( dpy, pm );
+   return 0;
+}
diff --git a/progs/xdemos/glxswapcontrol.c b/progs/xdemos/glxswapcontrol.c
new file mode 100644
index 00000000000..0ed5ebe4722
--- /dev/null
+++ b/progs/xdemos/glxswapcontrol.c
@@ -0,0 +1,824 @@
+/*
+ * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/*
+ * This is a port of the infamous "gears" demo to straight GLX (i.e. no GLUT)
+ * Port by Brian Paul  23 March 2001
+ *
+ * Modified by Ian Romanick <[email protected]> 09 April 2003 to support
+ * GLX_{MESA,SGI}_swap_control and GLX_OML_sync_control.
+ *
+ * Command line options:
+ *    -display       Name of the display to use.
+ *    -info          print GL implementation information
+ *    -swap N        Attempt to set the swap interval to 1/N second
+ *    -forcegetrate  Get the display refresh rate even if the required GLX
+ *                   extension is not supported.
+ */
+
+
+#include <math.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <X11/Xlib.h>
+#include <X11/keysym.h>
+#ifndef __VMS
+/*# include <stdint.h>*/
+#endif
+# define GLX_GLXEXT_PROTOTYPES
+#include <GL/gl.h>
+#include <GL/glx.h>
+
+#ifndef GLX_MESA_swap_control
+typedef GLint ( * PFNGLXSWAPINTERVALMESAPROC) (unsigned interval);
+typedef GLint ( * PFNGLXGETSWAPINTERVALMESAPROC) ( void );
+#endif
+
+#if !defined( GLX_OML_sync_control ) && defined( _STDINT_H )
+#define GLX_OML_sync_control 1
+typedef Bool ( * PFNGLXGETMSCRATEOMLPROC) (Display *dpy, GLXDrawable drawable, int32_t *numerator, int32_t *denominator);
+#endif
+
+#ifndef GLX_MESA_swap_frame_usage
+#define GLX_MESA_swap_frame_usage 1
+typedef int ( * PFNGLXGETFRAMEUSAGEMESAPROC) (Display *dpy, GLXDrawable drawable, float * usage );
+#endif
+
+#define BENCHMARK
+
+PFNGLXGETFRAMEUSAGEMESAPROC get_frame_usage = NULL;
+
+#ifdef BENCHMARK
+
+/* XXX this probably isn't very portable */
+
+#include <sys/time.h>
+#include <unistd.h>
+
+#define NUL '\0'
+
+/* return current time (in seconds) */
+static int
+current_time(void)
+{
+   struct timeval tv;
+#ifdef __VMS
+   (void) gettimeofday(&tv, NULL );
+#else
+   struct timezone tz;
+   (void) gettimeofday(&tv, &tz);
+#endif
+   return (int) tv.tv_sec;
+}
+
+#else /*BENCHMARK*/
+
+/* dummy */
+static int
+current_time(void)
+{
+   return 0;
+}
+
+#endif /*BENCHMARK*/
+
+
+
+#ifndef M_PI
+#define M_PI 3.14159265
+#endif
+
+
+static GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0;
+static GLint gear1, gear2, gear3;
+static GLfloat angle = 0.0;
+
+static GLboolean has_OML_sync_control = GL_FALSE;
+static GLboolean has_SGI_swap_control = GL_FALSE;
+static GLboolean has_MESA_swap_control = GL_FALSE;
+static GLboolean has_MESA_swap_frame_usage = GL_FALSE;
+
+static char ** extension_table = NULL;
+static unsigned num_extensions;
+
+static GLboolean use_ztrick = GL_FALSE;
+static GLfloat   aspect;
+
+/*
+ *
+ *  Draw a gear wheel.  You'll probably want to call this function when
+ *  building a display list since we do a lot of trig here.
+ * 
+ *  Input:  inner_radius - radius of hole at center
+ *          outer_radius - radius at center of teeth
+ *          width - width of gear
+ *          teeth - number of teeth
+ *          tooth_depth - depth of tooth
+ */
+static void
+gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
+     GLint teeth, GLfloat tooth_depth)
+{
+   GLint i;
+   GLfloat r0, r1, r2;
+   GLfloat angle, da;
+   GLfloat u, v, len;
+
+   r0 = inner_radius;
+   r1 = outer_radius - tooth_depth / 2.0;
+   r2 = outer_radius + tooth_depth / 2.0;
+
+   da = 2.0 * M_PI / teeth / 4.0;
+
+   glShadeModel(GL_FLAT);
+
+   glNormal3f(0.0, 0.0, 1.0);
+
+   /* draw front face */
+   glBegin(GL_QUAD_STRIP);
+   for (i = 0; i <= teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
+      if (i < teeth) {
+	 glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
+	 glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		    width * 0.5);
+      }
+   }
+   glEnd();
+
+   /* draw front sides of teeth */
+   glBegin(GL_QUADS);
+   da = 2.0 * M_PI / teeth / 4.0;
+   for (i = 0; i < teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
+      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
+      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
+		 width * 0.5);
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		 width * 0.5);
+   }
+   glEnd();
+
+   glNormal3f(0.0, 0.0, -1.0);
+
+   /* draw back face */
+   glBegin(GL_QUAD_STRIP);
+   for (i = 0; i <= teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
+      if (i < teeth) {
+	 glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		    -width * 0.5);
+	 glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
+      }
+   }
+   glEnd();
+
+   /* draw back sides of teeth */
+   glBegin(GL_QUADS);
+   da = 2.0 * M_PI / teeth / 4.0;
+   for (i = 0; i < teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		 -width * 0.5);
+      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
+		 -width * 0.5);
+      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
+   }
+   glEnd();
+
+   /* draw outward faces of teeth */
+   glBegin(GL_QUAD_STRIP);
+   for (i = 0; i < teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
+      glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
+      u = r2 * cos(angle + da) - r1 * cos(angle);
+      v = r2 * sin(angle + da) - r1 * sin(angle);
+      len = sqrt(u * u + v * v);
+      u /= len;
+      v /= len;
+      glNormal3f(v, -u, 0.0);
+      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
+      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
+      glNormal3f(cos(angle), sin(angle), 0.0);
+      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
+		 width * 0.5);
+      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
+		 -width * 0.5);
+      u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da);
+      v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da);
+      glNormal3f(v, -u, 0.0);
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		 width * 0.5);
+      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
+		 -width * 0.5);
+      glNormal3f(cos(angle), sin(angle), 0.0);
+   }
+
+   glVertex3f(r1 * cos(0), r1 * sin(0), width * 0.5);
+   glVertex3f(r1 * cos(0), r1 * sin(0), -width * 0.5);
+
+   glEnd();
+
+   glShadeModel(GL_SMOOTH);
+
+   /* draw inside radius cylinder */
+   glBegin(GL_QUAD_STRIP);
+   for (i = 0; i <= teeth; i++) {
+      angle = i * 2.0 * M_PI / teeth;
+      glNormal3f(-cos(angle), -sin(angle), 0.0);
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
+      glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
+   }
+   glEnd();
+}
+
+
+static void
+draw(void)
+{
+   if ( use_ztrick ) {
+      static GLboolean flip = GL_FALSE;
+      static const GLfloat vert[4][3] = {
+	 { -1, -1, -0.999 },
+	 {  1, -1, -0.999 },
+	 {  1,  1, -0.999 },
+	 { -1,  1, -0.999 }
+      };
+      static const GLfloat col[4][3] = {
+	 { 1.0, 0.6, 0.0 },
+	 { 1.0, 0.6, 0.0 },
+	 { 0.0, 0.0, 0.0 },
+	 { 0.0, 0.0, 0.0 },
+      };
+      
+      if ( flip ) {
+	 glDepthRange(0, 0.5);
+	 glDepthFunc(GL_LEQUAL);
+      }
+      else {
+	 glDepthRange(1.0, 0.4999);
+	 glDepthFunc(GL_GEQUAL);
+      }
+
+      flip = !flip;
+
+      /* The famous Quake "Z trick" only works when the whole screen is
+       * re-drawn each frame.
+       */
+
+      glMatrixMode(GL_MODELVIEW);
+      glLoadIdentity();
+      glMatrixMode(GL_PROJECTION);
+      glLoadIdentity();
+      glOrtho(-1, 1, -1, 1, -1, 1);
+      glDisable(GL_LIGHTING);
+      glShadeModel(GL_SMOOTH);
+
+      glEnable( GL_VERTEX_ARRAY );
+      glEnable( GL_COLOR_ARRAY );
+      glVertexPointer( 3, GL_FLOAT, 0, vert );
+      glColorPointer( 3, GL_FLOAT, 0, col );
+      glDrawArrays( GL_POLYGON, 0, 4 );
+      glDisable( GL_COLOR_ARRAY );
+      glDisable( GL_VERTEX_ARRAY );
+
+      glMatrixMode(GL_PROJECTION);
+      glLoadIdentity();
+      glFrustum(-1.0, 1.0, -aspect, aspect, 5.0, 60.0);
+
+      glEnable(GL_LIGHTING);
+
+      glMatrixMode(GL_MODELVIEW);
+      glLoadIdentity();
+      glTranslatef(0.0, 0.0, -40.0);
+   }
+   else {
+      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+   }
+
+   glPushMatrix();
+   glRotatef(view_rotx, 1.0, 0.0, 0.0);
+   glRotatef(view_roty, 0.0, 1.0, 0.0);
+   glRotatef(view_rotz, 0.0, 0.0, 1.0);
+
+   glPushMatrix();
+   glTranslatef(-3.0, -2.0, 0.0);
+   glRotatef(angle, 0.0, 0.0, 1.0);
+   glCallList(gear1);
+   glPopMatrix();
+
+   glPushMatrix();
+   glTranslatef(3.1, -2.0, 0.0);
+   glRotatef(-2.0 * angle - 9.0, 0.0, 0.0, 1.0);
+   glCallList(gear2);
+   glPopMatrix();
+
+   glPushMatrix();
+   glTranslatef(-3.1, 4.2, 0.0);
+   glRotatef(-2.0 * angle - 25.0, 0.0, 0.0, 1.0);
+   glCallList(gear3);
+   glPopMatrix();
+
+   glPopMatrix();
+}
+
+
+/* new window size or exposure */
+static void
+reshape(int width, int height)
+{
+   aspect = (GLfloat) height / (GLfloat) width;
+
+   
+   glViewport(0, 0, (GLint) width, (GLint) height);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+
+   glFrustum(-1.0, 1.0, -aspect, aspect, 5.0, 60.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef(0.0, 0.0, -40.0);
+}
+
+
+static void
+init(void)
+{
+   static GLfloat pos[4] = { 5.0, 5.0, 10.0, 0.0 };
+   static GLfloat red[4] = { 0.8, 0.1, 0.0, 1.0 };
+   static GLfloat green[4] = { 0.0, 0.8, 0.2, 1.0 };
+   static GLfloat blue[4] = { 0.2, 0.2, 1.0, 1.0 };
+
+   glLightfv(GL_LIGHT0, GL_POSITION, pos);
+   glEnable(GL_CULL_FACE);
+   glEnable(GL_LIGHTING);
+   glEnable(GL_LIGHT0);
+   glEnable(GL_DEPTH_TEST);
+
+   /* make the gears */
+   gear1 = glGenLists(1);
+   glNewList(gear1, GL_COMPILE);
+   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
+   gear(1.0, 4.0, 1.0, 20, 0.7);
+   glEndList();
+
+   gear2 = glGenLists(1);
+   glNewList(gear2, GL_COMPILE);
+   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
+   gear(0.5, 2.0, 2.0, 10, 0.7);
+   glEndList();
+
+   gear3 = glGenLists(1);
+   glNewList(gear3, GL_COMPILE);
+   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
+   gear(1.3, 2.0, 0.5, 10, 0.7);
+   glEndList();
+
+   glEnable(GL_NORMALIZE);
+}
+
+
+/*
+ * Create an RGB, double-buffered window.
+ * Return the window and context handles.
+ */
+static void
+make_window( Display *dpy, const char *name,
+             int x, int y, int width, int height,
+             Window *winRet, GLXContext *ctxRet)
+{
+   int attrib[] = { GLX_RGBA,
+		    GLX_RED_SIZE, 1,
+		    GLX_GREEN_SIZE, 1,
+		    GLX_BLUE_SIZE, 1,
+		    GLX_DOUBLEBUFFER,
+		    GLX_DEPTH_SIZE, 1,
+		    None };
+   int scrnum;
+   XSetWindowAttributes attr;
+   unsigned long mask;
+   Window root;
+   Window win;
+   GLXContext ctx;
+   XVisualInfo *visinfo;
+
+   scrnum = DefaultScreen( dpy );
+   root = RootWindow( dpy, scrnum );
+
+   visinfo = glXChooseVisual( dpy, scrnum, attrib );
+   if (!visinfo) {
+      printf("Error: couldn't get an RGB, Double-buffered visual\n");
+      exit(1);
+   }
+
+   /* window attributes */
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+
+   win = XCreateWindow( dpy, root, 0, 0, width, height,
+		        0, visinfo->depth, InputOutput,
+		        visinfo->visual, mask, &attr );
+
+   /* set hints and properties */
+   {
+      XSizeHints sizehints;
+      sizehints.x = x;
+      sizehints.y = y;
+      sizehints.width  = width;
+      sizehints.height = height;
+      sizehints.flags = USSize | USPosition;
+      XSetNormalHints(dpy, win, &sizehints);
+      XSetStandardProperties(dpy, win, name, name,
+                              None, (char **)NULL, 0, &sizehints);
+   }
+
+   ctx = glXCreateContext( dpy, visinfo, NULL, True );
+   if (!ctx) {
+      printf("Error: glXCreateContext failed\n");
+      exit(1);
+   }
+
+   XFree(visinfo);
+
+   *winRet = win;
+   *ctxRet = ctx;
+}
+
+
+static void
+event_loop(Display *dpy, Window win)
+{
+   float  frame_usage = 0.0;
+
+   while (1) {
+      while (XPending(dpy) > 0) {
+         XEvent event;
+         XNextEvent(dpy, &event);
+         switch (event.type) {
+	 case Expose:
+            /* we'll redraw below */
+	    break;
+	 case ConfigureNotify:
+	    reshape(event.xconfigure.width, event.xconfigure.height);
+	    break;
+         case KeyPress:
+            {
+               char buffer[10];
+               int r, code;
+               code = XLookupKeysym(&event.xkey, 0);
+               if (code == XK_Left) {
+                  view_roty += 5.0;
+               }
+               else if (code == XK_Right) {
+                  view_roty -= 5.0;
+               }
+               else if (code == XK_Up) {
+                  view_rotx += 5.0;
+               }
+               else if (code == XK_Down) {
+                  view_rotx -= 5.0;
+               }
+               else {
+                  r = XLookupString(&event.xkey, buffer, sizeof(buffer),
+                                    NULL, NULL);
+                  if (buffer[0] == 27) {
+                     /* escape */
+                     return;
+                  }
+               }
+            }
+         }
+      }
+
+      /* next frame */
+      angle += 2.0;
+
+      draw();
+      if ( get_frame_usage != NULL ) {
+	 GLfloat   temp;
+	 
+	 (*get_frame_usage)( dpy, win, & temp );
+	 frame_usage += temp;
+      }
+
+      glXSwapBuffers(dpy, win);
+
+      /* calc framerate */
+      {
+         static int t0 = -1;
+         static int frames = 0;
+         int t = current_time();
+
+         if (t0 < 0)
+            t0 = t;
+
+         frames++;
+
+         if (t - t0 >= 5.0) {
+            GLfloat seconds = t - t0;
+            GLfloat fps = frames / seconds;
+	    if ( get_frame_usage != NULL ) {
+	       printf("%d frames in %3.1f seconds = %6.3f FPS (%3.1f%% usage)\n",
+		      frames, seconds, fps,
+		      (frame_usage * 100.0) / (float) frames );
+	    }
+	    else {
+	       printf("%d frames in %3.1f seconds = %6.3f FPS\n",
+		      frames, seconds, fps);
+	    }
+
+            t0 = t;
+            frames = 0;
+	    frame_usage = 0.0;
+         }
+      }
+   }
+}
+
+
+/**
+ * Display the refresh rate of the display using the GLX_OML_sync_control
+ * extension.
+ */
+
+static void
+show_refresh_rate( Display * dpy )
+{
+#if defined(GLX_OML_sync_control) && defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
+   PFNGLXGETMSCRATEOMLPROC  get_msc_rate;
+   int32_t  n;
+   int32_t  d;
+
+   get_msc_rate = (PFNGLXGETMSCRATEOMLPROC) glXGetProcAddressARB( (const GLubyte *) "glXGetMscRateOML" );
+   if ( get_msc_rate != NULL ) {
+      (*get_msc_rate)( dpy, glXGetCurrentDrawable(), &n, &d );
+      printf( "refresh rate: %.1fHz\n", (float) n / d );
+      return;
+   }
+#endif
+   printf( "glXGetMscRateOML not supported.\n" );
+}
+
+
+/**
+ * Fill in the table of extension strings from a supplied extensions string
+ * (as returned by glXQueryExtensionsString).
+ *
+ * \param string   String of GLX extensions.
+ * \sa is_extension_supported
+ */
+
+static void
+make_extension_table( const char * string )
+{
+   char ** string_tab;
+   unsigned  num_strings;
+   unsigned  base;
+   unsigned  idx;
+   unsigned  i;
+      
+   /* Count the number of spaces in the string.  That gives a base-line
+    * figure for the number of extension in the string.
+    */
+   
+   num_strings = 1;
+   for ( i = 0 ; string[i] != NUL ; i++ ) {
+      if ( string[i] == ' ' ) {
+	 num_strings++;
+      }
+   }
+   
+   string_tab = (char **) malloc( sizeof( char * ) * num_strings );
+   if ( string_tab == NULL ) {
+      return;
+   }
+
+   base = 0;
+   idx = 0;
+
+   while ( string[ base ] != NUL ) {
+      /* Determine the length of the next extension string.
+       */
+
+      for ( i = 0 
+	    ; (string[ base + i ] != NUL) && (string[ base + i ] != ' ')
+	    ; i++ ) {
+	 /* empty */ ;
+      }
+
+      if ( i > 0 ) {
+	 /* If the string was non-zero length, add it to the table.  We
+	  * can get zero length strings if there is a space at the end of
+	  * the string or if there are two (or more) spaces next to each
+	  * other in the string.
+	  */
+
+	 string_tab[ idx ] = malloc( sizeof( char ) * (i + 1) );
+	 if ( string_tab[ idx ] == NULL ) {
+	    return;
+	 }
+
+	 (void) memcpy( string_tab[ idx ], & string[ base ], i );
+	 string_tab[ idx ][i] = NUL;
+	 idx++;
+      }
+
+
+      /* Skip to the start of the next extension string.
+       */
+
+      for ( base += i
+	    ; (string[ base ] == ' ') && (string[ base ] != NUL) 
+	    ; base++ ) {
+	 /* empty */ ;
+      }
+   }
+
+   extension_table = string_tab;
+   num_extensions = idx;
+}
+
+    
+/**
+ * Determine of an extension is supported.  The extension string table
+ * must have already be initialized by calling \c make_extension_table.
+ * 
+ * \praram ext  Extension to be tested.
+ * \return GL_TRUE of the extension is supported, GL_FALSE otherwise.
+ * \sa make_extension_table
+ */
+
+static GLboolean
+is_extension_supported( const char * ext )
+{
+   unsigned   i;
+   
+   for ( i = 0 ; i < num_extensions ; i++ ) {
+      if ( strcmp( ext, extension_table[i] ) == 0 ) {
+	 return GL_TRUE;
+      }
+   }
+   
+   return GL_FALSE;
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   Display *dpy;
+   Window win;
+   GLXContext ctx;
+   char *dpyName = ":0";
+   int swap_interval = 1;
+   GLboolean do_swap_interval = GL_FALSE;
+   GLboolean force_get_rate = GL_FALSE;
+   GLboolean printInfo = GL_FALSE;
+   int i;
+   PFNGLXSWAPINTERVALMESAPROC set_swap_interval = NULL;
+   PFNGLXGETSWAPINTERVALMESAPROC get_swap_interval = NULL;
+
+
+   for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "-display") == 0 && i + 1 < argc) {
+         dpyName = argv[i+1];
+         i++;
+      }
+      else if (strcmp(argv[i], "-info") == 0) {
+         printInfo = GL_TRUE;
+      }
+      else if (strcmp(argv[i], "-swap") == 0 && i + 1 < argc) {
+	 swap_interval = atoi( argv[i+1] );
+	 do_swap_interval = GL_TRUE;
+	 i++;
+      }
+      else if (strcmp(argv[i], "-forcegetrate") == 0) {
+	 /* This option was put in because some DRI drivers don't support the
+	  * full GLX_OML_sync_control extension, but they do support
+	  * glXGetMscRateOML.
+	  */
+	 force_get_rate = GL_TRUE;
+      }
+      else if (strcmp(argv[i], "-ztrick") == 0) {
+	 use_ztrick = GL_TRUE;
+      }
+      else if (strcmp(argv[i], "-help") == 0) {
+         printf("Usage:\n");
+         printf("  gears [options]\n");
+         printf("Options:\n");
+         printf("  -help                   Print this information\n");
+         printf("  -display displayName    Specify X display\n");
+         printf("  -info                   Display GL information\n");
+         printf("  -swap N                 Swap no more than once per N vertical refreshes\n");
+         printf("  -forcegetrate           Try to use glXGetMscRateOML function\n");
+         return 0;
+      }
+   }
+
+   dpy = XOpenDisplay(dpyName);
+   if (!dpy) {
+      printf("Error: couldn't open display %s\n", dpyName);
+      return -1;
+   }
+
+   make_window(dpy, "glxgears", 0, 0, 300, 300, &win, &ctx);
+   XMapWindow(dpy, win);
+   glXMakeCurrent(dpy, win, ctx);
+
+   make_extension_table( (char *) glXQueryExtensionsString(dpy,DefaultScreen(dpy)) );
+   has_OML_sync_control = is_extension_supported( "GLX_OML_sync_control" );
+   has_SGI_swap_control = is_extension_supported( "GLX_SGI_swap_control" );
+   has_MESA_swap_control = is_extension_supported( "GLX_MESA_swap_control" );
+   has_MESA_swap_frame_usage = is_extension_supported( "GLX_MESA_swap_frame_usage" );
+
+   if ( has_MESA_swap_control ) {
+      set_swap_interval = (PFNGLXSWAPINTERVALMESAPROC) glXGetProcAddressARB( (const GLubyte *) "glXSwapIntervalMESA" );
+      get_swap_interval = (PFNGLXGETSWAPINTERVALMESAPROC) glXGetProcAddressARB( (const GLubyte *) "glXGetSwapIntervalMESA" );
+   }
+   else if ( has_SGI_swap_control ) {
+      set_swap_interval = (PFNGLXSWAPINTERVALMESAPROC) glXGetProcAddressARB( (const GLubyte *) "glXSwapIntervalSGI" );
+   }
+
+
+   if ( has_MESA_swap_frame_usage ) {
+      get_frame_usage = (PFNGLXGETFRAMEUSAGEMESAPROC)  glXGetProcAddressARB( (const GLubyte *) "glXGetFrameUsageMESA" );
+   }
+      
+
+   if (printInfo) {
+      printf("GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
+      printf("GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
+      printf("GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
+      printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
+      if ( has_OML_sync_control || force_get_rate ) {
+	 show_refresh_rate( dpy );
+      }
+
+      if ( get_swap_interval != NULL ) {
+	 printf("Default swap interval = %d\n", (*get_swap_interval)() );
+      }
+   }
+
+   if ( do_swap_interval ) {
+      if ( set_swap_interval != NULL ) {
+	 if ( ((swap_interval == 0) && !has_MESA_swap_control)
+	      || (swap_interval < 0) ) {
+	    printf( "Swap interval must be non-negative or greater than zero "
+		    "if GLX_MESA_swap_control is not supported.\n" );
+	 }
+	 else {
+	    (*set_swap_interval)( swap_interval );
+	 }
+
+	 if ( printInfo && (get_swap_interval != NULL) ) {
+	    printf("Current swap interval = %d\n", (*get_swap_interval)() );
+	 }
+      }
+      else {
+	 printf("Unable to set swap-interval.  Neither GLX_SGI_swap_control "
+		"nor GLX_MESA_swap_control are supported.\n" );
+      }
+   }
+
+   init();
+
+   event_loop(dpy, win);
+
+   glXDestroyContext(dpy, ctx);
+   XDestroyWindow(dpy, win);
+   XCloseDisplay(dpy);
+
+   return 0;
+}
diff --git a/progs/xdemos/manywin.c b/progs/xdemos/manywin.c
new file mode 100644
index 00000000000..c9cca751341
--- /dev/null
+++ b/progs/xdemos/manywin.c
@@ -0,0 +1,393 @@
+/*
+ * Create N GLX windows/contexts and render to them in round-robin order.
+ * Also, have the contexts share all texture objects.
+ * Press 'd' to delete a texture, 'u' to unbind it.
+ *
+ * Copyright (C) 2000  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include <GL/gl.h>
+#include <GL/glx.h>
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <X11/keysym.h>
+
+
+/*
+ * Each display/window/context:
+ */
+struct head {
+   char DisplayName[1000];
+   Display *Dpy;
+   Window Win;
+   GLXContext Context;
+   float Angle;
+   char Renderer[1000];
+   char Vendor[1000];
+   char Version[1000];
+};
+
+
+#define MAX_HEADS 200
+static struct head Heads[MAX_HEADS];
+static int NumHeads = 0;
+static GLboolean SwapSeparate = GL_TRUE;
+static GLuint TexObj = 0;
+
+
+static void
+Error(const char *display, const char *msg)
+{
+   fprintf(stderr, "Error on display %s - %s\n", display, msg);
+   exit(1);
+}
+
+
+static struct head *
+AddHead(const char *displayName, const char *name)
+{
+   Display *dpy;
+   Window win;
+   GLXContext ctx;
+   int attrib[] = { GLX_RGBA,
+		    GLX_RED_SIZE, 1,
+		    GLX_GREEN_SIZE, 1,
+		    GLX_BLUE_SIZE, 1,
+		    GLX_DOUBLEBUFFER,
+		    None };
+   int scrnum;
+   XSetWindowAttributes attr;
+   unsigned long mask;
+   Window root;
+   XVisualInfo *visinfo;
+   int width = 90, height = 90;
+   int xpos = 0, ypos = 0;
+
+   if (NumHeads >= MAX_HEADS)
+      return NULL;
+
+   dpy = XOpenDisplay(displayName);
+   if (!dpy) {
+      Error(displayName, "Unable to open display");
+      return NULL;
+   }
+
+   scrnum = DefaultScreen(dpy);
+   root = RootWindow(dpy, scrnum);
+
+   visinfo = glXChooseVisual(dpy, scrnum, attrib);
+   if (!visinfo) {
+      Error(displayName, "Unable to find RGB, double-buffered visual");
+      return NULL;
+   }
+
+   /* window attributes */
+   xpos = (NumHeads % 10) * 100;
+   ypos = (NumHeads / 10) * 100;
+   printf("%d, %d\n", xpos, ypos);
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   attr.colormap = XCreateColormap(dpy, root, visinfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+
+   win = XCreateWindow(dpy, root, xpos, ypos, width, height,
+		        0, visinfo->depth, InputOutput,
+		        visinfo->visual, mask, &attr);
+   if (!win) {
+      Error(displayName, "Couldn't create window");
+      return NULL;
+   }
+
+   {
+      XSizeHints sizehints;
+      sizehints.x = xpos;
+      sizehints.y = ypos;
+      sizehints.width  = width;
+      sizehints.height = height;
+      sizehints.flags = USSize | USPosition;
+      XSetNormalHints(dpy, win, &sizehints);
+      XSetStandardProperties(dpy, win, name, name,
+                              None, (char **)NULL, 0, &sizehints);
+   }
+
+   if (NumHeads == 0) {
+      ctx = glXCreateContext(dpy, visinfo, NULL, True);
+   }
+   else {
+      /* share textures & dlists with 0th context */
+      printf("sharing\n");
+      ctx = glXCreateContext(dpy, visinfo, Heads[0].Context, True);
+   }
+   if (!ctx) {
+      Error(displayName, "Couldn't create GLX context");
+      return NULL;
+   }
+
+   XMapWindow(dpy, win);
+
+   if (!glXMakeCurrent(dpy, win, ctx)) {
+      Error(displayName, "glXMakeCurrent failed");
+      printf("glXMakeCurrent failed in Redraw()\n");
+      return NULL;
+   }
+
+   if (NumHeads == 0) {
+      /* create texture object now */
+      static const GLubyte checker[2][2][4] = {
+         { {255, 255, 255, 255}, {  0,   0,   0, 255} },
+         { {  0,   0,   0,   0}, {255, 255, 255, 255} }
+      };
+      glGenTextures(1, &TexObj);
+      assert(TexObj);
+      glBindTexture(GL_TEXTURE_2D, TexObj);
+      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 2, 2, 0, GL_RGB,
+                   GL_UNSIGNED_BYTE, checker);
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+   }
+   else {
+      /* bind 0th context's texture in this context too */
+      assert(TexObj);
+      glBindTexture(GL_TEXTURE_2D, TexObj);
+   }
+   glEnable(GL_TEXTURE_2D);
+
+   /* save the info for this head */
+   {
+      struct head *h = &Heads[NumHeads];
+      strcpy(h->DisplayName, name);
+      h->Dpy = dpy;
+      h->Win = win;
+      h->Context = ctx;
+      h->Angle = 0.0;
+      strcpy(h->Version, (char *) glGetString(GL_VERSION));
+      strcpy(h->Vendor, (char *) glGetString(GL_VENDOR));
+      strcpy(h->Renderer, (char *) glGetString(GL_RENDERER));
+      NumHeads++;
+      return &Heads[NumHeads-1];
+   }
+
+}
+
+
+static void
+DestroyHeads(void)
+{
+   int i;
+   for (i = 0; i < NumHeads; i++) {
+      XDestroyWindow(Heads[i].Dpy, Heads[i].Win);
+      glXDestroyContext(Heads[i].Dpy, Heads[i].Context);
+      XCloseDisplay(Heads[i].Dpy);
+   }
+}
+
+
+static void
+Redraw(struct head *h)
+{
+   if (!glXMakeCurrent(h->Dpy, h->Win, h->Context)) {
+      Error(h->DisplayName, "glXMakeCurrent failed");
+      printf("glXMakeCurrent failed in Redraw()\n");
+      return;
+   }
+
+   h->Angle += 1.0;
+
+   glShadeModel(GL_FLAT);
+   glClearColor(0.5, 0.5, 0.5, 1.0);
+   glClear(GL_COLOR_BUFFER_BIT);
+
+   /* draw green triangle */
+   glColor3f(0.0, 1.0, 0.0);
+   glPushMatrix();
+   glRotatef(h->Angle, 0, 0, 1);
+   glBegin(GL_TRIANGLES);
+   glTexCoord2f(0.5, 1.0);   glVertex2f(0, 0.8);
+   glTexCoord2f(0.0, 0.0);   glVertex2f(-0.8, -0.7);
+   glTexCoord2f(1.0, 0.0);   glVertex2f(0.8, -0.7);
+   glEnd();
+   glPopMatrix();
+
+   if (!SwapSeparate)
+      glXSwapBuffers(h->Dpy, h->Win);
+}
+
+
+static void
+Swap(struct head *h)
+{
+   glXSwapBuffers(h->Dpy, h->Win);
+}
+
+
+static void
+Resize(const struct head *h, unsigned int width, unsigned int height)
+{
+   if (!glXMakeCurrent(h->Dpy, h->Win, h->Context)) {
+      Error(h->DisplayName, "glXMakeCurrent failed in Resize()");
+      return;
+   }
+   glFlush();
+   glViewport(0, 0, width, height);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
+}
+
+
+
+static void
+EventLoop(void)
+{
+   while (1) {
+      int i;
+      for (i = 0; i < NumHeads; i++) {
+         struct head *h = &Heads[i];
+         while (XPending(h->Dpy) > 0) {
+            XEvent event;
+            XNextEvent(h->Dpy, &event);
+            if (event.xany.window == h->Win) {
+               switch (event.type) {
+                  case Expose:
+                     Redraw(h);
+                     if (SwapSeparate)
+                        Swap(h);
+                     break;
+                  case ConfigureNotify:
+                     Resize(h, event.xconfigure.width, event.xconfigure.height);
+                     break;
+                  case KeyPress:
+                     {
+                        char buf[100];
+                        KeySym keySym;
+                        XComposeStatus stat;
+                        XLookupString(&event.xkey, buf, sizeof(buf), &keySym, &stat);
+                        switch (keySym) {
+                           case XK_Escape:
+                              exit(0);
+                              break;
+                           case XK_d:
+                           case XK_D:
+                              printf("Delete Texture in window %d\n", i);
+                              glXMakeCurrent(h->Dpy, h->Win, h->Context);
+                              glDeleteTextures(1, &TexObj);
+                              break;
+                           case XK_u:
+                           case XK_U:
+                              printf("Unbind Texture in window %d\n", i);
+                              glXMakeCurrent(h->Dpy, h->Win, h->Context);
+                              glBindTexture(GL_TEXTURE_2D, 0);
+                              break;
+                        }
+                     }
+                     break;
+                  default:
+                     /*no-op*/ ;
+               }
+            }
+            else {
+               printf("window mismatch\n");
+            }
+         }
+      }
+
+      /* redraw all windows */
+      for (i = 0; i < NumHeads; i++) {
+         Redraw(&Heads[i]);
+      }
+      /* swapbuffers on all windows, if not already done */
+      if (SwapSeparate) {
+         for (i = 0; i < NumHeads; i++) {
+            Swap(&Heads[i]);
+         }
+      }
+      usleep(1);
+   }
+}
+
+
+
+static void
+PrintInfo(const struct head *h)
+{
+   printf("Name: %s\n", h->DisplayName);
+   printf("  Display:     %p\n", (void *) h->Dpy);
+   printf("  Window:      0x%x\n", (int) h->Win);
+   printf("  Context:     0x%lx\n", (long) h->Context);
+   printf("  GL_VERSION:  %s\n", h->Version);
+   printf("  GL_VENDOR:   %s\n", h->Vendor);
+   printf("  GL_RENDERER: %s\n", h->Renderer);
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   char *dpyName = NULL;
+   int i;
+
+   if (argc == 1) {
+      printf("manywin: open N simultaneous glx windows\n");
+      printf("Usage:\n");
+      printf("  manywin [-s] numWindows\n");
+      printf("Options:\n");
+      printf("  -s = swap immediately after drawing (see src code)\n");
+      printf("Example:\n");
+      printf("  manywin 10\n");
+      return 0;
+   }
+   else {
+      int n = 3;
+      for (i = 1; i < argc; i++) {
+         if (strcmp(argv[i], "-s") == 0) {
+            SwapSeparate = GL_FALSE;
+         }
+         else if (strcmp(argv[i], "-display") == 0 && i < argc) {
+            dpyName = argv[i+1];
+            i++;
+         }
+         else {
+            n = atoi(argv[i]);
+         }
+      }
+      if (n < 1)
+         n = 1;
+
+      printf("%d windows\n", n);
+      for (i = 0; i < n; i++) {
+         char name[100];
+         struct head *h;
+         sprintf(name, "%d", i);
+         h = AddHead(dpyName, name);
+         if (h) {
+            PrintInfo(h);
+         }
+      }
+   }
+
+   EventLoop();
+   DestroyHeads();
+   return 0;
+}
diff --git a/progs/xdemos/offset.c b/progs/xdemos/offset.c
new file mode 100644
index 00000000000..3e92e68daa7
--- /dev/null
+++ b/progs/xdemos/offset.c
@@ -0,0 +1,323 @@
+/****************************************************************************
+Copyright 1995 by Silicon Graphics Incorporated, Mountain View, California.
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its 
+documentation for any purpose and without fee is hereby granted, 
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in 
+supporting documentation, and that the name of Silicon Graphics not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.  
+
+SILICON GRAPHICS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+EVENT SHALL SILICON GRAPHICS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.
+
+****************************************************************************/
+
+/*
+ * Derived from code written by Kurt Akeley, November 1992
+ *
+ *	Uses PolygonOffset to draw hidden-line images.  PolygonOffset
+ *	    shifts the z values of polygons an amount that is
+ *	    proportional to their slope in screen z.  This keeps
+ *	    the lines, which are drawn without displacement, from
+ *	    interacting with their respective polygons, and
+ *	    thus eliminates line dropouts.
+ *
+ *	The left image shows an ordinary antialiased wireframe image.
+ *	The center image shows an antialiased hidden-line image without
+ *	    PolygonOffset.
+ *	The right image shows an antialiased hidden-line image using
+ *	    PolygonOffset to reduce artifacts.
+ *
+ *	Drag with a mouse button pressed to rotate the models.
+ *	Press the escape key to exit.
+ */
+
+/*
+ * Modified for OpenGL 1.1 glPolygonOffset() conventions
+ */
+
+
+#include <GL/glx.h>
+#include <GL/glu.h>
+#include <X11/keysym.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#undef GL_EXT_polygon_offset  /* use GL 1.1 version instead of extension */
+
+
+#ifndef EXIT_FAILURE
+#  define EXIT_FAILURE    1
+#endif
+#ifndef EXIT_SUCCESS
+#  define EXIT_SUCCESS    0
+#endif
+
+#define MAXQUAD 6
+
+typedef float Vertex[3];
+
+typedef Vertex Quad[4];
+
+/* data to define the six faces of a unit cube */
+Quad quads[MAXQUAD] = {
+   { {0,0,0}, {1,0,0}, {1,1,0}, {0,1,0} },
+   { {0,0,1}, {1,0,1}, {1,1,1}, {0,1,1} },
+   { {0,0,0}, {1,0,0}, {1,0,1}, {0,0,1} },
+   { {0,1,0}, {1,1,0}, {1,1,1}, {0,1,1} },
+   { {0,0,0}, {0,0,1}, {0,1,1}, {0,1,0} },
+   { {1,0,0}, {1,0,1}, {1,1,1}, {1,1,0} }
+};
+
+#define WIREFRAME	0
+#define HIDDEN_LINE	1
+
+static void error(const char* prog, const char* msg);
+static void cubes(int mx, int my, int mode);
+static void fill(Quad quad);
+static void outline(Quad quad);
+static void draw_hidden(Quad quad, int mode);
+static void process_input(Display *dpy, Window win);
+static int query_extension(char* extName);
+
+static int attributeList[] = { GLX_RGBA, GLX_RED_SIZE, 1, GLX_GREEN_SIZE, 1,
+    GLX_BLUE_SIZE, 1, GLX_DOUBLEBUFFER, GLX_DEPTH_SIZE, 1, None };
+
+static int dimension = 3;
+
+int main(int argc, char** argv) {
+    Display *dpy;
+    XVisualInfo *vi;
+    XSetWindowAttributes swa;
+    Window win;
+    GLXContext cx;
+
+    dpy = XOpenDisplay(0);
+    if (!dpy) error(argv[0], "can't open display");
+
+    vi = glXChooseVisual(dpy, DefaultScreen(dpy), attributeList);
+    if (!vi) error(argv[0], "no suitable visual");
+
+    cx = glXCreateContext(dpy, vi, 0, GL_TRUE);
+
+    swa.colormap = XCreateColormap(dpy, RootWindow(dpy, vi->screen),
+                                   vi->visual, AllocNone);
+
+    swa.border_pixel = 0;
+    swa.event_mask = ExposureMask | StructureNotifyMask | KeyPressMask |
+	ButtonPressMask | ButtonMotionMask;
+    win = XCreateWindow(dpy, RootWindow(dpy, vi->screen), 0, 0, 900, 300,
+			0, vi->depth, InputOutput, vi->visual,
+			CWBorderPixel|CWColormap|CWEventMask, &swa);
+    XStoreName(dpy, win, "hiddenline");
+    XMapWindow(dpy, win);
+
+    glXMakeCurrent(dpy, win, cx);
+
+    /* check for the polygon offset extension */
+#ifndef GL_VERSION_1_1
+    if (!query_extension("GL_EXT_polygon_offset"))
+        error(argv[0], "polygon_offset extension is not available");
+#else
+   (void) query_extension;
+#endif
+
+    /* set up viewing parameters */
+    glMatrixMode(GL_PROJECTION);
+    gluPerspective(20, 1, 0.1, 20);
+    glMatrixMode(GL_MODELVIEW);
+    glTranslatef(0, 0, -15);
+
+    /* set other relevant state information */
+    glEnable(GL_DEPTH_TEST);
+
+#ifdef GL_EXT_polygon_offset
+    printf("using 1.0 offset extension\n");
+    glPolygonOffsetEXT( 1.0, 0.00001 );
+#else
+    printf("using 1.1 offset\n");
+    glPolygonOffset( 1.0, 0.5 );
+#endif
+
+    glShadeModel( GL_FLAT );
+    glDisable( GL_DITHER );
+
+    /* process events until the user presses ESC */
+    while (1) process_input(dpy, win);
+
+    return 0;
+}
+
+static void
+draw_scene(int mx, int my) {
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    glPushMatrix();
+    glTranslatef(-1.7, 0.0, 0.0);
+    cubes(mx, my, WIREFRAME);
+    glPopMatrix();
+
+    glPushMatrix();
+    cubes(mx, my, HIDDEN_LINE);
+    glPopMatrix();
+
+    glPushMatrix();
+    glTranslatef(1.7, 0.0, 0.0);
+#ifdef GL_EXT_polygon_offset
+    glEnable(GL_POLYGON_OFFSET_EXT);
+#else
+    glEnable(GL_POLYGON_OFFSET_FILL);
+#endif
+    cubes(mx, my, HIDDEN_LINE);
+#ifdef GL_EXT_polygon_offset
+    glDisable(GL_POLYGON_OFFSET_EXT);
+#else
+    glDisable(GL_POLYGON_OFFSET_FILL);
+#endif
+    glPopMatrix();
+}
+
+
+static void
+cubes(int mx, int my, int mode) {
+    int x, y, z, i;
+
+    /* track the mouse */
+    glRotatef(mx / 2.0, 0, 1, 0);
+    glRotatef(my / 2.0, 1, 0, 0);
+
+    /* draw the lines as hidden polygons */
+    glTranslatef(-0.5, -0.5, -0.5);
+    glScalef(1.0/dimension, 1.0/dimension, 1.0/dimension);
+    for (z = 0; z < dimension; z++) {
+	for (y = 0; y < dimension; y++) {
+	    for (x = 0; x < dimension; x++) {
+		glPushMatrix();
+		glTranslatef(x, y, z);
+		glScalef(0.8, 0.8, 0.8);
+		for (i = 0; i < MAXQUAD; i++)
+		    draw_hidden(quads[i], mode);
+		glPopMatrix();
+	    }
+	}
+    }
+}
+
+static void
+fill(Quad quad) {
+    /* draw a filled polygon */
+    glBegin(GL_QUADS);
+    glVertex3fv(quad[0]);
+    glVertex3fv(quad[1]);
+    glVertex3fv(quad[2]);
+    glVertex3fv(quad[3]);
+    glEnd();
+}
+
+static void
+outline(Quad quad) {
+    /* draw an outlined polygon */
+    glBegin(GL_LINE_LOOP);
+    glVertex3fv(quad[0]);
+    glVertex3fv(quad[1]);
+    glVertex3fv(quad[2]);
+    glVertex3fv(quad[3]);
+    glEnd();
+}
+
+static void
+draw_hidden(Quad quad, int mode) {
+    if (mode == HIDDEN_LINE) {
+	glColor3f(0, 0, 0);
+	fill(quad);
+    }
+
+    /* draw the outline using white, optionally fill the interior with black */
+    glColor3f(1, 1, 1);
+    outline(quad);
+}
+
+static void
+process_input(Display *dpy, Window win) {
+    XEvent event;
+    static int prevx, prevy;
+    static int deltax = 90, deltay = 40;
+
+    do {
+	char buf[31];
+	KeySym keysym;
+
+	XNextEvent(dpy, &event);
+	switch(event.type) {
+	case Expose:
+	    break;
+	case ConfigureNotify: {
+	    /* this approach preserves a 1:1 viewport aspect ratio */
+	    int vX, vY, vW, vH;
+	    int eW = event.xconfigure.width, eH = event.xconfigure.height;
+	    if (eW >= eH) {
+		vX = 0;
+		vY = (eH - eW) >> 1;
+		vW = vH = eW;
+	    } else {
+		vX = (eW - eH) >> 1;
+		vY = 0;
+		vW = vH = eH;
+	    }
+	    glViewport(vX, vY, vW, vH);
+	    }
+	    break;
+	case KeyPress:
+	    (void) XLookupString(&event.xkey, buf, sizeof(buf), &keysym, NULL);
+	    switch (keysym) {
+	    case XK_Escape:
+		exit(EXIT_SUCCESS);
+	    default:
+		break;
+	    }
+	case ButtonPress:
+	    prevx = event.xbutton.x;
+	    prevy = event.xbutton.y;
+	    break;
+	case MotionNotify:
+	    deltax += (event.xbutton.x - prevx); prevx = event.xbutton.x;
+	    deltay += (event.xbutton.y - prevy); prevy = event.xbutton.y;
+	    break;
+	default:
+	    break;
+	}
+    } while (XPending(dpy));
+
+    draw_scene(deltax, deltay);
+    glXSwapBuffers(dpy, win);
+}
+
+static void
+error(const char *prog, const char *msg) {
+    fprintf(stderr, "%s: %s\n", prog, msg);
+    exit(EXIT_FAILURE);
+}
+
+static int
+query_extension(char* extName) {
+    char *p = (char *) glGetString(GL_EXTENSIONS);
+    char *end = p + strlen(p);
+    while (p < end) {
+        int n = strcspn(p, " ");
+        if ((strlen(extName) == n) && (strncmp(extName, p, n) == 0))
+            return GL_TRUE;
+        p += (n + 1);
+    }
+    return GL_FALSE;
+}
+
diff --git a/progs/xdemos/opencloseopen.c b/progs/xdemos/opencloseopen.c
new file mode 100644
index 00000000000..2e4de24c71d
--- /dev/null
+++ b/progs/xdemos/opencloseopen.c
@@ -0,0 +1,189 @@
+/*
+ * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
+ * (C) Copyright IBM Corporation 2003
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <X11/Xlib.h>
+#include <GL/gl.h>
+#include <GL/glx.h>
+
+/** \file opencloseopen.c
+ * Simple test for Mesa bug #508473.  Create a window and rendering context.
+ * Draw a single frame.  Close the window, destroy the context, and close
+ * the display.  Re-open the display, create a new window and context.  This
+ * should work, but, at least as of Mesa 5.1, it segfaults.  See the bug
+ * report for more details.
+ * 
+ * Most of the code here was lifed from various other Mesa xdemos.
+ */
+
+static void
+draw(void)
+{
+   glViewport(0, 0, 300, 300);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
+   glMatrixMode(GL_MODELVIEW);
+
+   glShadeModel(GL_FLAT);
+   glClearColor(0.5, 0.5, 0.5, 1.0);
+   glClear(GL_COLOR_BUFFER_BIT);
+
+   /* draw blue quad */
+   glLoadIdentity();
+   glColor3f(0.3, 0.3, 1.0);
+   glPushMatrix();
+   glRotatef(0, 0, 0, 1);
+   glBegin(GL_POLYGON);
+   glVertex2f(-0.5, -0.25);
+   glVertex2f( 0.5, -0.25);
+   glVertex2f( 0.5, 0.25);
+   glVertex2f(-0.5, 0.25);
+   glEnd();
+   glPopMatrix();}
+
+
+/*
+ * Create an RGB, double-buffered window.
+ * Return the window and context handles.
+ */
+static void
+make_window( const char * dpyName, const char *name,
+             int x, int y, int width, int height,
+	     Display **dpyRet, Window *winRet, GLXContext *ctxRet)
+{
+   int attrib[] = { GLX_RGBA,
+		    GLX_RED_SIZE, 1,
+		    GLX_GREEN_SIZE, 1,
+		    GLX_BLUE_SIZE, 1,
+		    GLX_DOUBLEBUFFER,
+		    None };
+   int scrnum;
+   XSetWindowAttributes attr;
+   unsigned long mask;
+   Window root;
+   Window win;
+   GLXContext ctx;
+   XVisualInfo *visinfo;
+   Display *dpy;
+
+   dpy = XOpenDisplay(dpyName);
+   if (!dpy) {
+      printf("Error: couldn't open display %s\n", dpyName);
+      exit(1);
+   }
+
+   *dpyRet = dpy;
+   scrnum = DefaultScreen( dpy );
+   root = RootWindow( dpy, scrnum );
+
+   visinfo = glXChooseVisual( dpy, scrnum, attrib );
+   if (!visinfo) {
+      printf("Error: couldn't get an RGB, Double-buffered visual\n");
+      exit(1);
+   }
+
+   /* window attributes */
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+
+   win = XCreateWindow( dpy, root, 0, 0, width, height,
+		        0, visinfo->depth, InputOutput,
+		        visinfo->visual, mask, &attr );
+
+   /* set hints and properties */
+   {
+      XSizeHints sizehints;
+      sizehints.x = x;
+      sizehints.y = y;
+      sizehints.width  = width;
+      sizehints.height = height;
+      sizehints.flags = USSize | USPosition;
+      XSetNormalHints(dpy, win, &sizehints);
+      XSetStandardProperties(dpy, win, name, name,
+                              None, (char **)NULL, 0, &sizehints);
+   }
+
+   ctx = glXCreateContext( dpy, visinfo, NULL, True );
+   if (!ctx) {
+      printf("Error: glXCreateContext failed\n");
+      exit(1);
+   }
+
+   XFree(visinfo);
+
+   *winRet = win;
+   *ctxRet = ctx;
+}
+
+
+static void
+destroy_window( Display *dpy, Window win, GLXContext ctx )
+{
+   glXMakeCurrent(dpy, None, NULL);
+   glXDestroyContext(dpy, ctx);
+   XDestroyWindow(dpy, win);
+   XCloseDisplay(dpy);
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   Display *dpy;
+   Window win;
+   GLXContext ctx;
+   char *dpyName = ":0";
+   int i;
+
+   for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "-display") == 0) {
+         dpyName = argv[i+1];
+         i++;
+      }
+   }
+
+   printf("If this program segfaults, then Mesa bug #508473 is probably "
+	  "back.\n");
+   make_window(dpyName, "Open-close-open", 0, 0, 300, 300, &dpy, &win, &ctx);
+   XMapWindow(dpy, win);
+   glXMakeCurrent(dpy, win, ctx);
+
+   draw();
+   glXSwapBuffers(dpy, win);
+   sleep(2);
+
+   destroy_window(dpy, win, ctx);
+
+   make_window(dpyName, "Open-close-open", 0, 0, 300, 300, &dpy, &win, &ctx);
+   XMapWindow(dpy, win);
+   glXMakeCurrent(dpy, win, ctx);
+   destroy_window(dpy, win, ctx);
+
+   return 0;
+}
diff --git a/progs/xdemos/overlay.c b/progs/xdemos/overlay.c
new file mode 100644
index 00000000000..4c425b64d46
--- /dev/null
+++ b/progs/xdemos/overlay.c
@@ -0,0 +1,245 @@
+/*
+ * GLX overlay test/demo.
+ *
+ * Brian Paul
+ * 18 July 2005
+ */
+
+#include <GL/gl.h>
+#include <GL/glx.h>
+#include <X11/keysym.h>
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static int WinWidth = 300, WinHeight = 300;
+static Window NormalWindow = 0;
+static Window OverlayWindow = 0;
+static GLXContext NormalContext = 0;
+static GLXContext OverlayContext = 0;
+static GLboolean RGBOverlay = GL_FALSE;
+static GLfloat Angle = 0.0;
+
+
+static void
+RedrawNormal(Display *dpy)
+{
+   glXMakeCurrent(dpy, NormalWindow, NormalContext);
+   glViewport(0, 0, WinWidth, WinHeight);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
+   glMatrixMode(GL_MODELVIEW);
+   glClearColor(0.5, 0.5, 0.5, 1.0);
+   glClear(GL_COLOR_BUFFER_BIT);
+   glColor3f(1.0, 1.0, 0.0);
+   glPushMatrix();
+   glRotatef(Angle, 0, 0, 1);
+   glRectf(-0.8, -0.8, 0.8, 0.8);
+   glPopMatrix();
+   glXSwapBuffers(dpy, NormalWindow);
+}
+
+
+static void
+RedrawOverlay(Display *dpy)
+{
+   glXMakeCurrent(dpy, OverlayWindow, OverlayContext);
+   glViewport(0, 0, WinWidth, WinHeight);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
+   glMatrixMode(GL_MODELVIEW);
+   glClear(GL_COLOR_BUFFER_BIT);
+   if (RGBOverlay) {
+      glColor3f(0.0, 1.0, 1.0);
+   }
+   else {
+      glIndexi(2);
+   }
+   glBegin(GL_LINES);
+   glVertex2f(-1, -1);
+   glVertex2f(1, 1);
+   glVertex2f(1, -1);
+   glVertex2f(-1, 1);
+   glEnd();
+   glXSwapBuffers(dpy, OverlayWindow);
+}
+
+
+static Window
+MakeWindow(Display *dpy, XVisualInfo *visinfo, Window parent,
+             unsigned int width, unsigned int height)
+{
+   int scrnum;
+   XSetWindowAttributes attr;
+   unsigned long mask;
+   Window root;
+   Window win;
+
+   scrnum = DefaultScreen(dpy);
+   root = RootWindow(dpy, scrnum);
+
+   /* window attributes */
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   attr.colormap = XCreateColormap(dpy, root, visinfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+
+   win = XCreateWindow(dpy, parent, 0, 0, width, height,
+		        0, visinfo->depth, InputOutput,
+		        visinfo->visual, mask, &attr);
+   return win;
+}
+
+
+static void
+MakeNormalWindow(Display *dpy)
+{
+   int attrib[] = { GLX_RGBA,
+		    GLX_RED_SIZE, 1,
+		    GLX_GREEN_SIZE, 1,
+		    GLX_BLUE_SIZE, 1,
+		    GLX_DOUBLEBUFFER,
+		    None };
+   int scrnum;
+   Window root;
+   XVisualInfo *visinfo;
+
+   scrnum = DefaultScreen(dpy);
+   root = RootWindow(dpy, scrnum);
+
+   visinfo = glXChooseVisual(dpy, scrnum, attrib);
+   if (!visinfo) {
+      printf("Error: couldn't get an RGB, Double-buffered visual\n");
+      exit(1);
+   }
+
+   NormalWindow = MakeWindow(dpy, visinfo, root, WinWidth, WinHeight);
+   assert(NormalWindow);
+
+   NormalContext = glXCreateContext(dpy, visinfo, NULL, True);
+   assert(NormalContext);
+}
+
+
+static void
+MakeOverlayWindow(Display *dpy)
+{
+   int rgbAttribs[] = {
+      GLX_RGBA,
+      GLX_RED_SIZE, 1,
+      GLX_GREEN_SIZE, 1,
+      GLX_BLUE_SIZE, 1,
+      GLX_DOUBLEBUFFER,
+      GLX_LEVEL, 1,
+      None
+   };
+   int indexAttribs[] = {
+      /*GLX_RGBA, leave this out */
+      GLX_RED_SIZE, 1,
+      GLX_GREEN_SIZE, 1,
+      GLX_BLUE_SIZE, 1,
+      GLX_DOUBLEBUFFER,
+      GLX_LEVEL, 1,
+      None
+   };
+   int scrnum;
+   Window root;
+   XVisualInfo *visinfo;
+
+   scrnum = DefaultScreen(dpy);
+   root = RootWindow(dpy, scrnum);
+
+   visinfo = glXChooseVisual(dpy, scrnum, rgbAttribs);
+   if (visinfo) {
+      printf("Found RGB overlay visual 0x%x\n", (int) visinfo->visualid);
+      RGBOverlay = GL_TRUE;
+   }
+   else {
+      visinfo = glXChooseVisual(dpy, scrnum, indexAttribs);
+      if (visinfo) {
+         printf("Found Color Index overlay visual 0x%x\n",
+                (int) visinfo->visualid);
+         /* XXX setup the colormap entries! */
+      }
+      else {
+         printf("Error: couldn't get an overlay visual!\n");
+         exit(1);
+      }
+   }
+
+   OverlayWindow = MakeWindow(dpy, visinfo, NormalWindow, WinWidth, WinHeight);
+   assert(OverlayWindow);
+
+   OverlayContext = glXCreateContext(dpy, visinfo, NULL, True);
+   assert(OverlayContext);
+}
+
+
+static void
+EventLoop(Display *dpy)
+{
+   XEvent event;
+
+   while (1) {
+      XNextEvent(dpy, &event);
+
+      switch (event.type) {
+	 case Expose:
+	    RedrawNormal(dpy);
+	    RedrawOverlay(dpy);
+	    break;
+	 case ConfigureNotify:
+            WinWidth = event.xconfigure.width;
+            WinHeight = event.xconfigure.height;
+            if (event.xconfigure.window == NormalWindow)
+               XResizeWindow(dpy, OverlayWindow, WinWidth, WinHeight);
+	    break;
+         case KeyPress:
+            {
+               char buffer[10];
+               int r, code;
+               code = XLookupKeysym(&event.xkey, 0);
+	       r = XLookupString(&event.xkey, buffer, sizeof(buffer),
+				 NULL, NULL);
+	       if (buffer[0] == 27) {
+                  /* escape */
+                  return;
+               }
+               else if (buffer[0] == ' ') {
+                  Angle += 5.0;
+                  RedrawNormal(dpy);
+               }
+            }
+            break;
+         default:
+            ; /* nothing */
+      }
+   }
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   Display *dpy = XOpenDisplay(NULL);
+
+   assert(dpy);
+
+   MakeNormalWindow(dpy);
+   MakeOverlayWindow(dpy);
+
+   XMapWindow(dpy, NormalWindow);
+   XMapWindow(dpy, OverlayWindow);
+
+   EventLoop(dpy);
+
+   glXDestroyContext(dpy, OverlayContext);
+   glXDestroyContext(dpy, NormalContext);
+   XDestroyWindow(dpy, OverlayWindow);
+   XDestroyWindow(dpy, NormalWindow);
+
+   return 0;
+}
diff --git a/progs/xdemos/pbdemo.c b/progs/xdemos/pbdemo.c
new file mode 100644
index 00000000000..efdfdfa4522
--- /dev/null
+++ b/progs/xdemos/pbdemo.c
@@ -0,0 +1,478 @@
+
+/*
+ * This program demonstrates how to do "off-screen" rendering using
+ * the GLX pixel buffer extension.
+ *
+ * Written by Brian Paul for the "OpenGL and Window System Integration"
+ * course presented at SIGGRAPH '97.  Updated on 5 October 2002.
+ *
+ * Usage:
+ *   pbuffers width height imgfile
+ * Where:
+ *   width is the width, in pixels, of the image to generate.
+ *   height is the height, in pixels, of the image to generate.
+ *   imgfile is the name of the PPM image file to write.
+ *
+ *
+ * This demo draws 3-D boxes with random orientation.  A pbuffer with
+ * a depth (Z) buffer is prefered but if such a pbuffer can't be created
+ * we use a non-depth-buffered config.
+ *
+ * On machines such as the SGI Indigo you may have to reconfigure your
+ * display/X server to enable pbuffers.  Look in the /usr/gfx/ucode/MGRAS/vof/
+ * directory for display configurationswith the _pbuf suffix.  Use
+ * setmon -x <vof> to configure your X server and display for pbuffers.
+ *
+ * O2 systems seem to support pbuffers well.
+ *
+ * IR systems (at least 1RM systems) don't have single-buffered, RGBA,
+ * Z-buffered pbuffer configs.  BUT, they DO have DOUBLE-buffered, RGBA,
+ * Z-buffered pbuffers.  Note how we try four different fbconfig attribute
+ * lists below!
+ */
+
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <X11/Xlib.h>
+#include "pbutil.h"
+
+
+/* Some ugly global vars */
+static Display *gDpy = NULL;
+static int gScreen = 0;
+static FBCONFIG gFBconfig = 0;
+static PBUFFER gPBuffer = 0;
+static int gWidth, gHeight;
+static GLXContext glCtx;
+
+
+
+/*
+ * Create the pbuffer and return a GLXPbuffer handle.
+ *
+ * We loop over a list of fbconfigs trying to create
+ * a pixel buffer.  We return the first pixel buffer which we successfully
+ * create.
+ */
+static PBUFFER
+MakePbuffer( Display *dpy, int screen, int width, int height )
+{
+#define NUM_FB_CONFIGS 4
+   const char fbString[NUM_FB_CONFIGS][100] = {
+      "Single Buffered, depth buffer",
+      "Double Buffered, depth buffer",
+      "Single Buffered, no depth buffer",
+      "Double Buffered, no depth buffer"
+   };
+   int fbAttribs[NUM_FB_CONFIGS][100] = {
+      {
+         /* Single buffered, with depth buffer */
+         GLX_RENDER_TYPE, GLX_RGBA_BIT,
+         GLX_DRAWABLE_TYPE, GLX_PBUFFER_BIT,
+         GLX_RED_SIZE, 1,
+         GLX_GREEN_SIZE, 1,
+         GLX_BLUE_SIZE, 1,
+         GLX_DEPTH_SIZE, 1,
+         GLX_DOUBLEBUFFER, 0,
+         GLX_STENCIL_SIZE, 0,
+         None
+      },
+      {
+         /* Double buffered, with depth buffer */
+         GLX_RENDER_TYPE, GLX_RGBA_BIT,
+         GLX_DRAWABLE_TYPE, GLX_PBUFFER_BIT,
+         GLX_RED_SIZE, 1,
+         GLX_GREEN_SIZE, 1,
+         GLX_BLUE_SIZE, 1,
+         GLX_DEPTH_SIZE, 1,
+         GLX_DOUBLEBUFFER, 1,
+         GLX_STENCIL_SIZE, 0,
+         None
+      },
+      {
+         /* Single bufferd, without depth buffer */
+         GLX_RENDER_TYPE, GLX_RGBA_BIT,
+         GLX_DRAWABLE_TYPE, GLX_PBUFFER_BIT,
+         GLX_RED_SIZE, 1,
+         GLX_GREEN_SIZE, 1,
+         GLX_BLUE_SIZE, 1,
+         GLX_DEPTH_SIZE, 0,
+         GLX_DOUBLEBUFFER, 0,
+         GLX_STENCIL_SIZE, 0,
+         None
+      },
+      {
+         /* Double bufferd, without depth buffer */
+         GLX_RENDER_TYPE, GLX_RGBA_BIT,
+         GLX_DRAWABLE_TYPE, GLX_PBUFFER_BIT,
+         GLX_RED_SIZE, 1,
+         GLX_GREEN_SIZE, 1,
+         GLX_BLUE_SIZE, 1,
+         GLX_DEPTH_SIZE, 0,
+         GLX_DOUBLEBUFFER, 1,
+         GLX_STENCIL_SIZE, 0,
+         None
+      }
+   };
+   Bool largest = True;
+   Bool preserve = False;
+   FBCONFIG *fbConfigs;
+   PBUFFER pBuffer = None;
+   int nConfigs;
+   int i;
+   int attempt;
+
+   for (attempt=0; attempt<NUM_FB_CONFIGS; attempt++) {
+
+      /* Get list of possible frame buffer configurations */
+      fbConfigs = ChooseFBConfig(dpy, screen, fbAttribs[attempt], &nConfigs);
+      if (nConfigs==0 || !fbConfigs) {
+         printf("Error: glXChooseFBConfig failed\n");
+         XCloseDisplay(dpy);
+         return 0;
+      }
+
+#if 0 /*DEBUG*/
+      for (i=0;i<nConfigs;i++) {
+         printf("Config %d\n", i);
+         PrintFBConfigInfo(dpy, screen, fbConfigs[i], 0);
+      }
+#endif
+
+      /* Create the pbuffer using first fbConfig in the list that works. */
+      for (i=0;i<nConfigs;i++) {
+         pBuffer = CreatePbuffer(dpy, screen, fbConfigs[i], width, height, preserve, largest);
+         if (pBuffer) {
+            gFBconfig = fbConfigs[i];
+            gWidth = width;
+            gHeight = height;
+            break;
+         }
+      }
+
+      if (pBuffer!=None) {
+         break;
+      }
+   }
+
+   if (pBuffer) {
+      printf("Using: %s\n", fbString[attempt]);
+   }
+
+   XFree(fbConfigs);
+
+   return pBuffer;
+#undef NUM_FB_CONFIGS
+}
+
+
+
+/*
+ * Do all the X / GLX setup stuff.
+ */
+static int
+Setup(int width, int height)
+{
+   int pbSupport;
+   XVisualInfo *visInfo;
+
+   /* Open the X display */
+   gDpy = XOpenDisplay(NULL);
+   if (!gDpy) {
+      printf("Error: couldn't open default X display.\n");
+      return 0;
+   }
+
+   /* Get default screen */
+   gScreen = DefaultScreen(gDpy);
+
+   /* Test that pbuffers are available */
+   pbSupport = QueryPbuffers(gDpy, gScreen);
+   if (pbSupport == 1) {
+      printf("Using GLX 1.3 Pbuffers\n");
+   }
+   else if (pbSupport == 2) {
+      printf("Using SGIX Pbuffers\n");
+   }
+   else {
+      printf("Error: pbuffers not available on this screen\n");
+      XCloseDisplay(gDpy);
+      return 0;
+   }
+
+   /* Create Pbuffer */
+   gPBuffer = MakePbuffer( gDpy, gScreen, width, height );
+   if (gPBuffer==None) {
+      printf("Error: couldn't create pbuffer\n");
+      XCloseDisplay(gDpy);
+      return 0;
+   }
+
+   /* Get corresponding XVisualInfo */
+   visInfo = GetVisualFromFBConfig(gDpy, gScreen, gFBconfig);
+   if (!visInfo) {
+      printf("Error: can't get XVisualInfo from FBconfig\n");
+      XCloseDisplay(gDpy);
+      return 0;
+   }
+
+   /* Create GLX context */
+   glCtx = glXCreateContext(gDpy, visInfo, NULL, True);
+   if (!glCtx) {
+      /* try indirect */
+      glCtx = glXCreateContext(gDpy, visInfo, NULL, False);
+      if (!glCtx) {
+         printf("Error: Couldn't create GLXContext\n");
+         XFree(visInfo);
+         XCloseDisplay(gDpy);
+         return 0;
+      }
+      else {
+         printf("Warning: using indirect GLXContext\n");
+      }
+   }
+
+   /* Bind context to pbuffer */
+   if (!glXMakeCurrent(gDpy, gPBuffer, glCtx)) {
+      printf("Error: glXMakeCurrent failed\n");
+      XFree(visInfo);
+      XCloseDisplay(gDpy);
+      return 0;
+   }
+
+   return 1;  /* Success!! */
+}
+
+
+
+/* One-time GL setup */
+static void
+InitGL(void)
+{
+   static GLfloat pos[4] = {0.0, 0.0, 10.0, 0.0};
+   glEnable(GL_LIGHTING);
+   glEnable(GL_LIGHT0);
+   glLightfv(GL_LIGHT0, GL_POSITION, pos);
+   glEnable(GL_NORMALIZE);
+   glEnable(GL_DEPTH_TEST);
+   glEnable(GL_CULL_FACE);
+
+   glViewport(0, 0, gWidth, gHeight);
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -15.0 );
+}
+
+
+/* Return random float in [0,1] */
+static float
+Random(void)
+{
+   int i = rand();
+   return (float) (i % 1000) / 1000.0;
+}
+
+
+static void
+RandomColor(void)
+{
+   GLfloat c[4];
+   c[0] = Random();
+   c[1] = Random();
+   c[2] = Random();
+   c[3] = 1.0;
+   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, c);
+}
+
+
+/* This function borrowed from Mark Kilgard's GLUT */
+static void
+drawBox(GLfloat x0, GLfloat x1, GLfloat y0, GLfloat y1,
+  GLfloat z0, GLfloat z1, GLenum type)
+{
+  static GLfloat n[6][3] =
+  {
+    {-1.0, 0.0, 0.0},
+    {0.0, 1.0, 0.0},
+    {1.0, 0.0, 0.0},
+    {0.0, -1.0, 0.0},
+    {0.0, 0.0, 1.0},
+    {0.0, 0.0, -1.0}
+  };
+  static GLint faces[6][4] =
+  {
+    {0, 1, 2, 3},
+    {3, 2, 6, 7},
+    {7, 6, 5, 4},
+    {4, 5, 1, 0},
+    {5, 6, 2, 1},
+    {7, 4, 0, 3}
+  };
+  GLfloat v[8][3], tmp;
+  GLint i;
+
+  if (x0 > x1) {
+    tmp = x0;
+    x0 = x1;
+    x1 = tmp;
+  }
+  if (y0 > y1) {
+    tmp = y0;
+    y0 = y1;
+    y1 = tmp;
+  }
+  if (z0 > z1) {
+    tmp = z0;
+    z0 = z1;
+    z1 = tmp;
+  }
+  v[0][0] = v[1][0] = v[2][0] = v[3][0] = x0;
+  v[4][0] = v[5][0] = v[6][0] = v[7][0] = x1;
+  v[0][1] = v[1][1] = v[4][1] = v[5][1] = y0;
+  v[2][1] = v[3][1] = v[6][1] = v[7][1] = y1;
+  v[0][2] = v[3][2] = v[4][2] = v[7][2] = z0;
+  v[1][2] = v[2][2] = v[5][2] = v[6][2] = z1;
+
+  for (i = 0; i < 6; i++) {
+    glBegin(type);
+    glNormal3fv(&n[i][0]);
+    glVertex3fv(&v[faces[i][0]][0]);
+    glVertex3fv(&v[faces[i][1]][0]);
+    glVertex3fv(&v[faces[i][2]][0]);
+    glVertex3fv(&v[faces[i][3]][0]);
+    glEnd();
+  }
+}
+
+
+
+/* Render a scene */
+static void
+Render(void)
+{
+   int NumBoxes = 100;
+   int i;
+
+   glClearColor(0.2, 0.2, 0.9, 0.0);
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   for (i=0;i<NumBoxes;i++) {
+      float tx = -2.0 + 4.0 * Random();
+      float ty = -2.0 + 4.0 * Random();
+      float tz =  4.0 - 16.0 * Random();
+      float sx = 0.1 + Random() * 0.4;
+      float sy = 0.1 + Random() * 0.4;
+      float sz = 0.1 + Random() * 0.4;
+      float rx = Random();
+      float ry = Random();
+      float rz = Random();
+      float ra = Random() * 360.0;
+      glPushMatrix();
+      glTranslatef(tx, ty, tz);
+      glRotatef(ra, rx, ry, rz);
+      glScalef(sx, sy, sz);
+      RandomColor();
+      drawBox(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0, GL_POLYGON);
+      glPopMatrix();
+   }
+
+   glFinish();
+}
+
+
+
+static void
+WriteFile(const char *filename)
+{
+   FILE *f;
+   GLubyte *image;
+   int i;
+
+   image = malloc(gWidth * gHeight * 3 * sizeof(GLubyte));
+   if (!image) {
+      printf("Error: couldn't allocate image buffer\n");
+      return;
+   }
+
+   glPixelStorei(GL_PACK_ALIGNMENT, 1);
+   glReadPixels(0, 0, gWidth, gHeight, GL_RGB, GL_UNSIGNED_BYTE, image);
+
+   f = fopen(filename, "w");
+   if (!f) {
+      printf("Couldn't open image file: %s\n", filename);
+      return;
+   }
+   fprintf(f,"P6\n");
+   fprintf(f,"# ppm-file created by %s\n", "trdemo2");
+   fprintf(f,"%i %i\n", gWidth, gHeight);
+   fprintf(f,"255\n");
+   fclose(f);
+   f = fopen(filename, "ab");  /* now append binary data */
+   if (!f) {
+      printf("Couldn't append to image file: %s\n", filename);
+      return;
+   }
+
+   for (i=0;i<gHeight;i++) {
+      GLubyte *rowPtr;
+      /* Remember, OpenGL images are bottom to top.  Have to reverse. */
+      rowPtr = image + (gHeight-1-i) * gWidth*3;
+      fwrite(rowPtr, 1, gWidth*3, f);
+   }
+
+   fclose(f);
+   free(image);
+
+   printf("Wrote %d by %d image file: %s\n", gWidth, gHeight, filename);
+}
+
+
+
+/*
+ * Print message describing command line parameters.
+ */
+static void
+Usage(const char *appName)
+{
+   printf("Usage:\n");
+   printf("  %s width height imgfile\n", appName);
+   printf("Where imgfile is a ppm file\n");
+}
+
+
+
+int
+main(int argc, char *argv[])
+{
+   if (argc!=4) {
+      Usage(argv[0]);
+   }
+   else {
+      int width = atoi(argv[1]);
+      int height = atoi(argv[2]);
+      char *fileName = argv[3];
+      if (width<=0) {
+         printf("Error: width parameter must be at least 1.\n");
+         return 1;
+      }
+      if (height<=0) {
+         printf("Error: height parameter must be at least 1.\n");
+         return 1;
+      }
+      if (!Setup(width, height)) {
+         return 1;
+      }
+      InitGL();
+      Render();
+      WriteFile(fileName);
+      DestroyPbuffer(gDpy, gScreen, gPBuffer);
+   }
+   return 0;
+}
+
diff --git a/progs/xdemos/pbinfo.c b/progs/xdemos/pbinfo.c
new file mode 100644
index 00000000000..88d93c8da62
--- /dev/null
+++ b/progs/xdemos/pbinfo.c
@@ -0,0 +1,106 @@
+
+/*
+ * Print list of fbconfigs and test each to see if a pbuffer can be created
+ * for that config.
+ *
+ * Brian Paul
+ * April 1997
+ * Updated on 5 October 2002.
+ */
+
+
+#include <X11/Xlib.h>
+#include <stdio.h>
+#include <string.h>
+#include "pbutil.h"
+
+
+
+
+static void
+PrintConfigs(Display *dpy, int screen, Bool horizFormat)
+{
+   FBCONFIG *fbConfigs;
+   int nConfigs;
+   int i;
+
+   fbConfigs = GetAllFBConfigs(dpy, screen, &nConfigs);
+   if (!nConfigs || !fbConfigs) {
+      printf("Error: glxGetFBConfigs failed\n");
+      return;
+   }
+
+   printf("Number of fbconfigs: %d\n", nConfigs);
+
+   if (horizFormat) {
+      printf("  ID        VisualType  Depth Lvl RGB CI DB Stereo  R  G  B  A");
+      printf("   Z  S  AR AG AB AA  MSbufs MSnum  Pbuffer  Float\n");
+   }
+
+   /* Print config info */
+   for (i = 0; i < nConfigs; i++) {
+      PrintFBConfigInfo(dpy, screen, fbConfigs[i], horizFormat);
+   }
+
+   /* free the list */
+   XFree(fbConfigs);
+}
+
+
+
+static void
+PrintUsage(void)
+{
+   printf("Options:\n");
+   printf("  -display <display-name>  specify X display name\n");
+   printf("  -t                       print in tabular format\n");
+   printf("  -v                       print in verbose format\n");
+   printf("  -help                    print this information\n");
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   Display *dpy;
+   int scrn;
+   char *dpyName = NULL;
+   Bool horizFormat = True;
+   int i;
+
+   for (i=1; i<argc; i++) {
+      if (strcmp(argv[i],"-display")==0) {
+	 if (i+1<argc) {
+	    dpyName = argv[i+1];
+	    i++;
+	 }
+      }
+      else if (strcmp(argv[i],"-t")==0) {
+	 /* tabular format */
+	 horizFormat = True;
+      }
+      else if (strcmp(argv[i],"-v")==0) {
+	 /* verbose format */
+	 horizFormat = False;
+      }
+      else if (strcmp(argv[i],"-help")==0) {
+	 PrintUsage();
+	 return 0;
+      }
+      else {
+	 printf("Unknown option: %s\n", argv[i]);
+      }
+   }
+
+   dpy = XOpenDisplay(dpyName);
+
+   if (!dpy) {
+      printf("Error: couldn't open display %s\n", dpyName ? dpyName : ":0");
+      return 1;
+   }
+
+   scrn = DefaultScreen(dpy);
+   PrintConfigs(dpy, scrn, horizFormat);
+   XCloseDisplay(dpy);
+   return 0;
+}
diff --git a/progs/xdemos/pbutil.c b/progs/xdemos/pbutil.c
new file mode 100644
index 00000000000..d0bbd1b0fce
--- /dev/null
+++ b/progs/xdemos/pbutil.c
@@ -0,0 +1,426 @@
+
+/*
+ * OpenGL pbuffers utility functions.
+ *
+ * Brian Paul
+ * Original code: April 1997
+ * Updated on 5 October 2002
+ * Updated again on 3 January 2005 to use GLX 1.3 functions in preference
+ * to the GLX_SGIX_fbconfig/pbuffer extensions.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include "pbutil.h"
+
+
+/**
+ * Test if we pixel buffers are available for a particular X screen.
+ * Input:  dpy - the X display
+ *         screen - screen number
+ * Return:  0 = pixel buffers not available.
+ *          1 = pixel buffers are available via GLX 1.3.
+ *          2 = pixel buffers are available via GLX_SGIX_fbconfig/pbuffer.
+ */
+int
+QueryPbuffers(Display *dpy, int screen)
+{
+#if defined(GLX_VERSION_1_3)
+   {
+      /* GLX 1.3 supports pbuffers */
+      int glxVersionMajor, glxVersionMinor;
+      if (!glXQueryVersion(dpy, &glxVersionMajor, &glxVersionMinor)) {
+         /* GLX not available! */
+         return 0;
+      }
+      if (glxVersionMajor * 100 + glxVersionMinor >= 103) {
+         return 1;
+      }
+      /* fall-through */
+   }
+#endif
+
+#if defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer)
+   /* Try the SGIX extensions */
+   {
+      char *extensions;
+      extensions = (char *) glXQueryServerString(dpy, screen, GLX_EXTENSIONS);
+      if (!extensions ||
+          !strstr(extensions,"GLX_SGIX_fbconfig") ||
+          !strstr(extensions,"GLX_SGIX_pbuffer")) {
+         return 0;
+      }
+      return 2;
+   }
+#endif
+
+   return 0;
+}
+
+
+
+FBCONFIG *
+ChooseFBConfig(Display *dpy, int screen, const int attribs[], int *nConfigs)
+{
+   int pbSupport = QueryPbuffers(dpy, screen);
+#if defined(GLX_VERSION_1_3)
+   if (pbSupport == 1) {
+      return glXChooseFBConfig(dpy, screen, attribs, nConfigs);
+   }
+#endif
+#if defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer)
+   if (pbSupport == 2) {
+      return glXChooseFBConfigSGIX(dpy, screen, (int *) attribs, nConfigs);
+   }
+#endif
+   return NULL;
+}
+
+
+FBCONFIG *
+GetAllFBConfigs(Display *dpy, int screen, int *nConfigs)
+{
+   int pbSupport = QueryPbuffers(dpy, screen);
+#if defined(GLX_VERSION_1_3)
+   if (pbSupport == 1) {
+      return glXGetFBConfigs(dpy, screen, nConfigs);
+   }
+#endif
+#if defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer)
+   if (pbSupport == 2) {
+      /* The GLX_SGIX_fbconfig extensions says to pass NULL to get list
+       * of all available configurations.
+       */
+      return glXChooseFBConfigSGIX(dpy, screen, NULL, nConfigs);
+   }
+#endif
+   return NULL;
+}
+
+
+XVisualInfo *
+GetVisualFromFBConfig(Display *dpy, int screen, FBCONFIG config)
+{
+   int pbSupport = QueryPbuffers(dpy, screen);
+#if defined(GLX_VERSION_1_3)
+   if (pbSupport == 1) {
+      return glXGetVisualFromFBConfig(dpy, config);
+   }
+#endif
+#if defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer)
+   if (pbSupport == 2) {
+      return glXGetVisualFromFBConfigSGIX(dpy, config);
+   }
+#endif
+   return NULL;
+}
+
+
+/**
+ * Either use glXGetFBConfigAttrib() or glXGetFBConfigAttribSGIX()
+ * to query an fbconfig attribute.
+ */
+static int
+GetFBConfigAttrib(Display *dpy, int screen,
+#if defined(GLX_VERSION_1_3)
+                  const GLXFBConfig config,
+#elif defined(GLX_SGIX_fbconfig)
+                  const GLXFBConfigSGIX config,
+#endif
+                  int attrib
+                  )
+{
+   int pbSupport = QueryPbuffers(dpy, screen);
+   int value = 0;
+
+#if defined(GLX_VERSION_1_3)
+   if (pbSupport == 1) {
+      /* ok */
+      if (glXGetFBConfigAttrib(dpy, config, attrib, &value) != 0) {
+         value = 0;
+      }
+      return value;
+   }
+   /* fall-through */
+#endif
+
+#if defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer)
+   if (pbSupport == 2) {
+      if (glXGetFBConfigAttribSGIX(dpy, config, attrib, &value) != 0) {
+         value = 0;
+      }
+      return value;
+   }
+#endif
+   
+   return value;
+}
+
+
+
+/**
+ * Print parameters for a GLXFBConfig to stdout.
+ * Input:  dpy - the X display
+ *         screen - the X screen number
+ *         fbConfig - the fbconfig handle
+ *         horizFormat - if true, print in horizontal format
+ */
+void
+PrintFBConfigInfo(Display *dpy, int screen, FBCONFIG config, Bool horizFormat)
+{
+   PBUFFER pBuffer;
+   int width=2, height=2;
+   int bufferSize, level, doubleBuffer, stereo, auxBuffers;
+   int redSize, greenSize, blueSize, alphaSize;
+   int depthSize, stencilSize;
+   int accumRedSize, accumBlueSize, accumGreenSize, accumAlphaSize;
+   int sampleBuffers, samples;
+   int drawableType, renderType, xRenderable, xVisual, id;
+   int maxWidth, maxHeight, maxPixels;
+   int optWidth, optHeight;
+   int floatComponents = 0;
+
+   /* do queries using the GLX 1.3 tokens (same as the SGIX tokens) */
+   bufferSize     = GetFBConfigAttrib(dpy, screen, config, GLX_BUFFER_SIZE);
+   level          = GetFBConfigAttrib(dpy, screen, config, GLX_LEVEL);
+   doubleBuffer   = GetFBConfigAttrib(dpy, screen, config, GLX_DOUBLEBUFFER);
+   stereo         = GetFBConfigAttrib(dpy, screen, config, GLX_STEREO);
+   auxBuffers     = GetFBConfigAttrib(dpy, screen, config, GLX_AUX_BUFFERS);
+   redSize        = GetFBConfigAttrib(dpy, screen, config, GLX_RED_SIZE);
+   greenSize      = GetFBConfigAttrib(dpy, screen, config, GLX_GREEN_SIZE);
+   blueSize       = GetFBConfigAttrib(dpy, screen, config, GLX_BLUE_SIZE);
+   alphaSize      = GetFBConfigAttrib(dpy, screen, config, GLX_ALPHA_SIZE);
+   depthSize      = GetFBConfigAttrib(dpy, screen, config, GLX_DEPTH_SIZE);
+   stencilSize    = GetFBConfigAttrib(dpy, screen, config, GLX_STENCIL_SIZE);
+   accumRedSize   = GetFBConfigAttrib(dpy, screen, config, GLX_ACCUM_RED_SIZE);
+   accumGreenSize = GetFBConfigAttrib(dpy, screen, config, GLX_ACCUM_GREEN_SIZE);
+   accumBlueSize  = GetFBConfigAttrib(dpy, screen, config, GLX_ACCUM_BLUE_SIZE);
+   accumAlphaSize = GetFBConfigAttrib(dpy, screen, config, GLX_ACCUM_ALPHA_SIZE);
+   sampleBuffers  = GetFBConfigAttrib(dpy, screen, config, GLX_SAMPLE_BUFFERS);
+   samples        = GetFBConfigAttrib(dpy, screen, config, GLX_SAMPLES);
+   drawableType   = GetFBConfigAttrib(dpy, screen, config, GLX_DRAWABLE_TYPE);
+   renderType     = GetFBConfigAttrib(dpy, screen, config, GLX_RENDER_TYPE);
+   xRenderable    = GetFBConfigAttrib(dpy, screen, config, GLX_X_RENDERABLE);
+   xVisual        = GetFBConfigAttrib(dpy, screen, config, GLX_X_VISUAL_TYPE);
+   if (!xRenderable || !(drawableType & GLX_WINDOW_BIT_SGIX))
+      xVisual = -1;
+
+   id        = GetFBConfigAttrib(dpy, screen, config, GLX_FBCONFIG_ID);
+   maxWidth  = GetFBConfigAttrib(dpy, screen, config, GLX_MAX_PBUFFER_WIDTH);
+   maxHeight = GetFBConfigAttrib(dpy, screen, config, GLX_MAX_PBUFFER_HEIGHT);
+   maxPixels = GetFBConfigAttrib(dpy, screen, config, GLX_MAX_PBUFFER_PIXELS);
+#if defined(GLX_SGIX_pbuffer)
+   optWidth  = GetFBConfigAttrib(dpy, screen, config, GLX_OPTIMAL_PBUFFER_WIDTH_SGIX);
+   optHeight = GetFBConfigAttrib(dpy, screen, config, GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX);
+#else
+   optWidth = optHeight = 0;
+#endif
+#if defined(GLX_NV_float_buffer)
+   floatComponents = GetFBConfigAttrib(dpy, screen, config, GLX_FLOAT_COMPONENTS_NV);
+#endif
+
+   /* See if we can create a pbuffer with this config */
+   pBuffer = CreatePbuffer(dpy, screen, config, width, height, False, False);
+
+   if (horizFormat) {
+      printf("0x%-9x ", id);
+      if (xVisual==GLX_STATIC_GRAY)        printf("StaticGray  ");
+      else if (xVisual==GLX_GRAY_SCALE)    printf("GrayScale   ");
+      else if (xVisual==GLX_STATIC_COLOR)  printf("StaticColor ");
+      else if (xVisual==GLX_PSEUDO_COLOR)  printf("PseudoColor ");
+      else if (xVisual==GLX_TRUE_COLOR)    printf("TrueColor   ");
+      else if (xVisual==GLX_DIRECT_COLOR)  printf("DirectColor ");
+      else                            printf("  -none-    ");
+      printf(" %3d %3d   %s   %s  %s   %2s   ", bufferSize, level,
+	     (renderType & GLX_RGBA_BIT_SGIX) ? "y" : ".",
+	     (renderType & GLX_COLOR_INDEX_BIT_SGIX) ? "y" : ".",
+	     doubleBuffer ? "y" : ".",
+	     stereo ? "y" : ".");
+      printf("%2d %2d %2d %2d  ", redSize, greenSize, blueSize, alphaSize);
+      printf("%2d %2d  ", depthSize, stencilSize);
+      printf("%2d %2d %2d %2d", accumRedSize, accumGreenSize, accumBlueSize,
+	     accumAlphaSize);
+      printf("    %2d    %2d", sampleBuffers, samples);
+      printf("       %s       %c", pBuffer ? "y" : ".",
+             ".y"[floatComponents]);
+      printf("\n");
+   }
+   else {
+      printf("Id 0x%x\n", id);
+      printf("  Buffer Size: %d\n", bufferSize);
+      printf("  Level: %d\n", level);
+      printf("  Double Buffer: %s\n", doubleBuffer ? "yes" : "no");
+      printf("  Stereo: %s\n", stereo ? "yes" : "no");
+      printf("  Aux Buffers: %d\n", auxBuffers);
+      printf("  Red Size: %d\n", redSize);
+      printf("  Green Size: %d\n", greenSize);
+      printf("  Blue Size: %d\n", blueSize);
+      printf("  Alpha Size: %d\n", alphaSize);
+      printf("  Depth Size: %d\n", depthSize);
+      printf("  Stencil Size: %d\n", stencilSize);
+      printf("  Accum Red Size: %d\n", accumRedSize);
+      printf("  Accum Green Size: %d\n", accumGreenSize);
+      printf("  Accum Blue Size: %d\n", accumBlueSize);
+      printf("  Accum Alpha Size: %d\n", accumAlphaSize);
+      printf("  Sample Buffers: %d\n", sampleBuffers);
+      printf("  Samples/Pixel: %d\n", samples);
+      printf("  Drawable Types: ");
+      if (drawableType & GLX_WINDOW_BIT)  printf("Window ");
+      if (drawableType & GLX_PIXMAP_BIT)  printf("Pixmap ");
+      if (drawableType & GLX_PBUFFER_BIT)  printf("PBuffer");
+      printf("\n");
+      printf("  Render Types: ");
+      if (renderType & GLX_RGBA_BIT_SGIX)  printf("RGBA ");
+      if (renderType & GLX_COLOR_INDEX_BIT_SGIX)  printf("CI ");
+      printf("\n");
+      printf("  X Renderable: %s\n", xRenderable ? "yes" : "no");
+
+      printf("  Pbuffer: %s\n", pBuffer ? "yes" : "no");
+      printf("  Max Pbuffer width: %d\n", maxWidth);
+      printf("  Max Pbuffer height: %d\n", maxHeight);
+      printf("  Max Pbuffer pixels: %d\n", maxPixels);
+      printf("  Optimum Pbuffer width: %d\n", optWidth);
+      printf("  Optimum Pbuffer height: %d\n", optHeight);
+
+      printf("  Float Components: %s\n", floatComponents ? "yes" : "no");
+   }
+
+   if (pBuffer) {
+      DestroyPbuffer(dpy, screen, pBuffer);
+   }
+}
+
+
+
+GLXContext
+CreateContext(Display *dpy, int screen, FBCONFIG config)
+{
+   int pbSupport = QueryPbuffers(dpy, screen);
+#if defined(GLX_VERSION_1_3)
+   if (pbSupport == 1) {
+      /* GLX 1.3 */
+      GLXContext c;
+      c = glXCreateNewContext(dpy, config, GLX_RGBA_TYPE, NULL, True);
+      if (!c) {
+         /* try indirect */
+         c = glXCreateNewContext(dpy, config, GLX_RGBA_TYPE, NULL, False);
+      }
+      return c;
+   }
+#endif
+#if defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer)
+   if (pbSupport == 2) {
+      GLXContext c;
+      c = glXCreateContextWithConfigSGIX(dpy, config, GLX_RGBA_TYPE_SGIX, NULL, True);
+      if (!c) {
+         c = glXCreateContextWithConfigSGIX(dpy, config, GLX_RGBA_TYPE_SGIX, NULL, False);
+      }
+      return c;
+   }
+#endif
+   return 0;
+}
+
+
+void
+DestroyContext(Display *dpy, GLXContext ctx)
+{
+   glXDestroyContext(dpy, ctx);
+}
+
+
+/* This is only used by CreatePbuffer() */
+static int XErrorFlag = 0;
+static int HandleXError(Display *dpy, XErrorEvent *event)
+{
+    XErrorFlag = 1;
+    return 0;
+}
+
+
+/**
+ * Create a Pbuffer.  Use an X error handler to deal with potential
+ * BadAlloc errors.
+ *
+ * Input:  dpy - the X display
+ *         fbConfig - an FBConfig as returned by glXChooseFBConfigSGIX().
+ *         width, height - size of pixel buffer to request, in pixels.
+ *         pbAttribs - list of optional pixel buffer attributes
+ * Return:  a Pbuffer or None.
+ */
+PBUFFER
+CreatePbuffer(Display *dpy, int screen, FBCONFIG config,
+              int width, int height, Bool largest, Bool preserve)
+{
+   int (*oldHandler)(Display *, XErrorEvent *);
+   PBUFFER pBuffer = None;
+   int pbSupport = QueryPbuffers(dpy, screen);
+
+   /* Catch X protocol errors with our own error handler */
+   oldHandler = XSetErrorHandler(HandleXError);
+   XErrorFlag = 0;
+
+#if defined(GLX_VERSION_1_3)
+   if (pbSupport == 1) {
+      /* GLX 1.3 */
+      int attribs[100], i = 0;
+      attribs[i++] = GLX_PBUFFER_WIDTH;
+      attribs[i++] = width;
+      attribs[i++] = GLX_PBUFFER_HEIGHT;
+      attribs[i++] = height;
+      attribs[i++] = GLX_PRESERVED_CONTENTS;
+      attribs[i++] = preserve;
+      attribs[i++] = GLX_LARGEST_PBUFFER;
+      attribs[i++] = largest;
+      attribs[i++] = 0;
+      pBuffer = glXCreatePbuffer(dpy, config, attribs);
+   }
+   else
+#endif
+#if defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer)
+   if (pbSupport == 2) {
+      int attribs[100], i = 0;
+      attribs[i++] = GLX_PRESERVED_CONTENTS;
+      attribs[i++] = preserve;
+      attribs[i++] = GLX_LARGEST_PBUFFER;
+      attribs[i++] = largest;
+      attribs[i++] = 0;
+      pBuffer = glXCreateGLXPbufferSGIX(dpy, config, width, height, attribs);
+   }
+   else
+#endif
+   {
+      pBuffer = None;
+   }
+
+   /* Restore original X error handler */
+   (void) XSetErrorHandler(oldHandler);
+
+   /* Return pbuffer (may be None) */
+   if (!XErrorFlag && pBuffer != None) {
+      /*printf("config %d worked!\n", i);*/
+      return pBuffer;
+   }
+   else {
+      return None;
+   }
+}
+
+
+void
+DestroyPbuffer(Display *dpy, int screen, PBUFFER pbuffer)
+{
+   int pbSupport = QueryPbuffers(dpy, screen);
+#if defined(GLX_VERSION_1_3)
+   if (pbSupport == 1) {
+      glXDestroyPbuffer(dpy, pbuffer);
+      return;
+   }
+#endif
+#if defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer)
+   if (pbSupport == 2) {
+      glXDestroyGLXPbufferSGIX(dpy, pbuffer);
+      return;
+   }
+#endif
+}
diff --git a/progs/xdemos/pbutil.h b/progs/xdemos/pbutil.h
new file mode 100644
index 00000000000..e95b2565a23
--- /dev/null
+++ b/progs/xdemos/pbutil.h
@@ -0,0 +1,66 @@
+/*
+ * OpenGL pbuffers utility functions.
+ *
+ * Brian Paul
+ * April 1997
+ */
+
+
+#ifndef PBUTIL_H
+#define PBUTIL_H
+
+
+#define GLX_GLXEXT_PROTOTYPES
+#include <GL/glx.h>
+
+
+#if defined(GLX_VERSION_1_3)
+#define PBUFFER GLXPbuffer
+#define FBCONFIG GLXFBConfig
+#elif defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer)
+#define PBUFFER GLXPbufferSGIX
+#define FBCONFIG GLXFBConfigSGIX
+#else
+#define PBUFFER int
+#define FBCONFIG int
+#endif
+
+
+extern int
+QueryPbuffers(Display *dpy, int screen);
+
+
+extern void
+PrintFBConfigInfo(Display *dpy, int screen, FBCONFIG config, Bool horizFormat);
+
+
+extern FBCONFIG *
+ChooseFBConfig(Display *dpy, int screen, const int attribs[], int *nConfigs);
+
+
+extern FBCONFIG *
+GetAllFBConfigs(Display *dpy, int screen, int *nConfigs);
+
+
+extern XVisualInfo *
+GetVisualFromFBConfig(Display *dpy, int screen, FBCONFIG config);
+
+
+extern GLXContext
+CreateContext(Display *dpy, int screen, FBCONFIG config);
+
+
+extern void
+DestroyContext(Display *dpy, GLXContext ctx);
+
+
+extern PBUFFER
+CreatePbuffer(Display *dpy, int screen, FBCONFIG config,
+	      int width, int height, Bool preserve, Bool largest);
+
+
+extern void
+DestroyPbuffer(Display *dpy, int screen, PBUFFER pbuffer);
+
+
+#endif  /*PBUTIL_H*/
diff --git a/progs/xdemos/shape.c b/progs/xdemos/shape.c
new file mode 100644
index 00000000000..dbbc0b4ff72
--- /dev/null
+++ b/progs/xdemos/shape.c
@@ -0,0 +1,394 @@
+
+/*
+ * Example of using the X "shape" extension with OpenGL:  render a spinning
+ * cube inside of a non-rectangular window.
+ *
+ * Press ESC to exit.  Press up/down to change window shape.
+ *
+ * To compile add "shape" to the PROGS list in Makefile.
+ *
+ * Brian Paul
+ * June 16, 1997
+ *
+ * This program is in the public domain.
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include <time.h>
+#include <unistd.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <X11/keysym.h>
+#include <X11/extensions/shape.h>
+#include <GL/glx.h>
+
+#ifndef PI
+#define PI 3.1415926
+#endif
+
+
+static int Width=500, Height=500;
+
+static float Xangle = 0.0, Yangle = 0.0;
+static int Redraw = 0;
+static int Sides = 5;
+static int MinSides = 3;
+static int MaxSides = 20;
+
+
+/* return current time (in seconds) */
+static double
+current_time(void)
+{
+   struct timeval tv;
+#ifdef __VMS
+   (void) gettimeofday(&tv, NULL );
+#else
+   struct timezone tz;
+   (void) gettimeofday(&tv, &tz);
+#endif
+   return (double) tv.tv_sec + tv.tv_usec / 1000000.0;
+}
+
+
+/*
+ * Draw the OpenGL stuff and do a SwapBuffers.
+ */
+static void display(Display *dpy, Window win)
+{
+   float scale = 1.7;
+
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   glPushMatrix();
+
+   glScalef(scale, scale, scale);
+   glRotatef(Xangle, 1.0, 0.0, 0.0);
+   glRotatef(Yangle, 0.0, 1.0, 0.0);
+
+   /*
+    * wireframe box
+    */
+   glColor3f(1.0, 1.0, 1.0);
+   glBegin(GL_LINE_LOOP);
+   glVertex3f(-1.0, -1.0, -1.0);
+   glVertex3f( 1.0, -1.0, -1.0);
+   glVertex3f( 1.0,  1.0, -1.0);
+   glVertex3f(-1.0,  1.0, -1.0);
+   glEnd();
+
+   glBegin(GL_LINE_LOOP);
+   glVertex3f(-1.0, -1.0, 1.0);
+   glVertex3f( 1.0, -1.0, 1.0);
+   glVertex3f( 1.0,  1.0, 1.0);
+   glVertex3f(-1.0,  1.0, 1.0);
+   glEnd();
+
+   glBegin(GL_LINES);
+   glVertex3f(-1.0, -1.0, -1.0);   glVertex3f(-1.0, -1.0, 1.0);
+   glVertex3f( 1.0, -1.0, -1.0);   glVertex3f( 1.0, -1.0, 1.0);
+   glVertex3f( 1.0,  1.0, -1.0);   glVertex3f( 1.0,  1.0, 1.0);
+   glVertex3f(-1.0,  1.0, -1.0);   glVertex3f(-1.0,  1.0, 1.0);
+   glEnd();
+
+   /*
+    * Solid box
+    */
+   glPushMatrix();
+   glScalef(0.75, 0.75, 0.75);
+
+   glColor3f(1, 0, 0);
+   glBegin(GL_POLYGON);
+   glVertex3f(1, -1, -1);
+   glVertex3f(1,  1, -1);
+   glVertex3f(1,  1,  1);
+   glVertex3f(1, -1,  1);
+   glEnd();
+
+   glColor3f(0, 1, 1);
+   glBegin(GL_POLYGON);
+   glVertex3f(-1, -1, -1);
+   glVertex3f(-1,  1, -1);
+   glVertex3f(-1,  1,  1);
+   glVertex3f(-1, -1,  1);
+   glEnd();
+
+   glColor3f(0, 1, 0);
+   glBegin(GL_POLYGON);
+   glVertex3f(-1, 1, -1);
+   glVertex3f( 1, 1, -1);
+   glVertex3f( 1, 1,  1);
+   glVertex3f(-1, 1,  1);
+   glEnd();
+
+   glColor3f(1, 0, 1);
+   glBegin(GL_POLYGON);
+   glVertex3f(-1, -1, -1);
+   glVertex3f( 1, -1, -1);
+   glVertex3f( 1, -1,  1);
+   glVertex3f(-1, -1,  1);
+   glEnd();
+
+   glColor3f(0, 0, 1);
+   glBegin(GL_POLYGON);
+   glVertex3f(-1, -1, 1);
+   glVertex3f( 1, -1, 1);
+   glVertex3f( 1,  1, 1);
+   glVertex3f(-1,  1, 1);
+   glEnd();
+
+   glColor3f(1, 1, 0);
+   glBegin(GL_POLYGON);
+   glVertex3f(-1, -1, -1);
+   glVertex3f( 1, -1, -1);
+   glVertex3f( 1,  1, -1);
+   glVertex3f(-1,  1, -1);
+   glEnd();
+   glPopMatrix();
+
+
+   glPopMatrix();
+
+   glXSwapBuffers(dpy, win);
+}
+
+
+/*
+ * This is called when we have to recompute the window shape bitmask.
+ * We just generate an n-sided regular polygon here but any other shape
+ * would be possible.
+ */
+static void make_shape_mask(Display *dpy, Window win, int width, int height,
+                            int sides)
+{
+   Pixmap shapeMask;
+   XGCValues xgcv;
+   GC gc;
+
+   /* allocate 1-bit deep pixmap and a GC */
+   shapeMask = XCreatePixmap(dpy, win, width, height, 1);
+   gc = XCreateGC(dpy, shapeMask, 0, &xgcv);
+
+   /* clear shapeMask to zeros */
+   XSetForeground(dpy, gc, 0);
+   XFillRectangle(dpy, shapeMask, gc, 0, 0, width, height);
+
+   /* draw mask */
+   XSetForeground(dpy, gc, 1);
+   {
+      int cx = width / 2;
+      int cy = height / 2;
+      float angle = 0.0;
+      float step = 2.0 * PI / sides;
+      float radius = width / 2;
+      int i;
+      XPoint points[100];
+      for (i=0;i<sides;i++) {
+         int x = cx + radius * sin(angle);
+         int y = cy - radius * cos(angle);
+         points[i].x = x;
+         points[i].y = y;
+         angle += step;
+      }
+      XFillPolygon(dpy, shapeMask, gc, points, sides, Convex, CoordModeOrigin);
+   }
+
+   /* This is the only SHAPE extension call- simple! */
+   XShapeCombineMask(dpy, win, ShapeBounding, 0, 0, shapeMask, ShapeSet);
+
+   XFreeGC(dpy, gc);
+   XFreePixmap(dpy, shapeMask);
+}
+
+
+/*
+ * Called when window is resized.  Do OpenGL viewport and projection stuff.
+ */
+static void reshape(int width, int height)
+{
+   glViewport(0, 0, width, height);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glFrustum(-1.0, 1.0, -1.0, 1.0, 3.0, 20.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef(0.0, 0.0, -10.0);
+
+   glEnable(GL_DEPTH_TEST);
+}
+
+
+/*
+ * Process X events.
+ */
+static void event_loop(Display *dpy, Window win)
+{
+   while (1) {
+      XEvent event;
+      if (XPending(dpy)) {
+         XNextEvent(dpy, &event);
+         switch (event.type) {
+            case Expose:
+               display(dpy, event.xexpose.window);
+               break;
+            case ConfigureNotify:
+               Width = event.xconfigure.width;
+               Height = event.xconfigure.height,
+               make_shape_mask(dpy, win, Width, Height, Sides);
+               reshape(Width, Height);
+               break;
+            case KeyPress:
+               {
+                  char buf[100];
+                  KeySym keySym;
+                  XComposeStatus stat;
+                  XLookupString(&event.xkey, buf, sizeof(buf), &keySym, &stat);
+                  switch (keySym) {
+                     case XK_Escape:
+                        exit(0);
+                        break;
+                     case XK_Up:
+                        Sides++;
+                        if (Sides>MaxSides) Sides = MaxSides;
+                        make_shape_mask(dpy, win, Width, Height, Sides);
+                        break;
+                     case XK_Down:
+                        Sides--;
+                        if (Sides<MinSides) Sides = MinSides;
+                        make_shape_mask(dpy, win, Width, Height, Sides);
+                        break;
+                  }
+               }
+               break;
+            default:
+               ;;
+         }
+      }
+      else {
+         static double t0 = -1.0;
+         double dt, t = current_time();
+         if (t0 < 0.0)
+            t0 = t;
+         dt = t - t0;
+         Xangle += 90.0 * dt;  /* 90 degrees per second */
+         Yangle += 70.0 * dt;
+         t0 = t;
+         display(dpy, win);
+      }
+   }
+}
+
+
+/*
+ * Allocate a "nice" colormap.  This could be better (HP-CR support, etc).
+ */
+static Colormap alloc_colormap(Display *dpy, Window parent, Visual *vis)
+{
+   Screen *scr = DefaultScreenOfDisplay(dpy);
+   int scrnum = DefaultScreen(dpy);
+
+   if (MaxCmapsOfScreen(scr)==1 && vis==DefaultVisual(dpy, scrnum)) {
+      /* The window and root are of the same visual type so */
+      /* share the root colormap. */
+      return DefaultColormap(dpy, scrnum);
+   }
+   else {
+      return XCreateColormap(dpy, parent, vis, AllocNone);
+   }
+}
+
+
+int main(int argc, char *argv[])
+{
+   static int glAttribs[] = {
+      GLX_DOUBLEBUFFER,
+      GLX_RGBA,
+      GLX_DEPTH_SIZE, 1,
+      None
+   };
+   Display *dpy;
+   XVisualInfo *visInfo;
+   int scrn;
+   Window root;
+   Colormap cmap;
+   Window win;
+   XSetWindowAttributes winAttribs;
+   unsigned long winAttribsMask;
+   GLXContext glCtx;
+   int ignore;
+   const char *name = "OpenGL in a Shaped Window";
+
+   dpy = XOpenDisplay(NULL);
+   if (!dpy) {
+      fprintf(stderr, "Couldn't open default display\n");
+      return 1;
+   }
+
+   /* check that we can use the shape extension */
+   if (!XQueryExtension(dpy, "SHAPE", &ignore, &ignore, &ignore )) {
+      fprintf(stderr, "Display doesn't support shape extension\n");
+      return 1;
+   }
+
+   scrn = DefaultScreen(dpy);
+
+   root = RootWindow(dpy, scrn);
+
+   visInfo = glXChooseVisual(dpy, scrn, glAttribs);
+   if (!visInfo) {
+      fprintf(stderr, "Couldn't get RGB, DB, Z visual\n");
+      return 1;
+   }
+
+   glCtx = glXCreateContext(dpy, visInfo, 0, True);
+   if (!glCtx) {
+      fprintf(stderr, "Couldn't create GL context\n");
+      return 1;
+   }
+
+   cmap = alloc_colormap(dpy, root, visInfo->visual);
+   if (!cmap) {
+      fprintf(stderr, "Couln't create colormap\n");
+      return 1;
+   }
+
+   winAttribs.border_pixel = 0;
+   winAttribs.colormap = cmap;
+   winAttribs.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
+   winAttribsMask = CWBorderPixel | CWColormap | CWEventMask;
+   win = XCreateWindow(dpy, root, 0, 0, Width, Height, 0,
+                       visInfo->depth, InputOutput,
+                       visInfo->visual,
+                       winAttribsMask, &winAttribs);
+
+   {
+      XSizeHints sizehints;
+      /*
+      sizehints.x = xpos;
+      sizehints.y = ypos;
+      sizehints.width  = width;
+      sizehints.height = height;
+      */
+      sizehints.flags = 0;
+      XSetNormalHints(dpy, win, &sizehints);
+      XSetStandardProperties(dpy, win, name, name,
+                              None, (char **)NULL, 0, &sizehints);
+   }
+
+
+   XMapWindow(dpy, win);
+
+   glXMakeCurrent(dpy, win, glCtx);
+
+   printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
+   printf("Press ESC to exit.\n");
+   printf("Press up/down to change window shape.\n");
+
+   event_loop(dpy, win);
+
+   return 0;
+}
diff --git a/progs/xdemos/vgears.c b/progs/xdemos/vgears.c
new file mode 100644
index 00000000000..13d030a8bef
--- /dev/null
+++ b/progs/xdemos/vgears.c
@@ -0,0 +1,282 @@
+/* $ID$ */
+
+/*
+ * Spinning gears demo for Linux SVGA/Mesa interface in 32K color mode.
+ *
+ * Compile with:  gcc vgears.c -I../include -L../lib -lMesaGL -lX11 -lXext
+ *   -lvga -lm -o vgears
+ *
+ * This program is in the public domain.
+ * Brian Paul, January 1996
+ */
+
+
+#include <vga.h>
+#include <math.h>
+#include "GL/svgamesa.h"
+#include "GL/gl.h"
+
+
+int width = 800, height = 600;
+
+SVGAMesaContext vmc;
+
+
+
+/*
+ * Draw a gear wheel.  You'll probably want to call this function when
+ * building a display list since we do a lot of trig here.
+ *
+ * Input:  inner_radius - radius of hole at center
+ *         outer_radius - radius at center of teeth
+ *         width - width of gear
+ *         teeth - number of teeth
+ *         tooth_depth - depth of tooth
+ */
+static void gear( GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
+		  GLint teeth, GLfloat tooth_depth )
+{
+   GLint i;
+   GLfloat r0, r1, r2;
+   GLfloat angle, da;
+   GLfloat u, v, len;
+
+   r0 = inner_radius;
+   r1 = outer_radius - tooth_depth/2.0;
+   r2 = outer_radius + tooth_depth/2.0;
+
+   da = 2.0*M_PI / teeth / 4.0;
+
+   glShadeModel( GL_FLAT );
+
+   glNormal3f( 0.0, 0.0, 1.0 );
+
+   /* draw front face */
+   glBegin( GL_QUAD_STRIP );
+   for (i=0;i<=teeth;i++) {
+      angle = i * 2.0*M_PI / teeth;
+      glVertex3f( r0*cos(angle), r0*sin(angle), width*0.5 );
+      glVertex3f( r1*cos(angle), r1*sin(angle), width*0.5 );
+      glVertex3f( r0*cos(angle), r0*sin(angle), width*0.5 );
+      glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da), width*0.5 );
+   }
+   glEnd();
+
+   /* draw front sides of teeth */
+   glBegin( GL_QUADS );
+   da = 2.0*M_PI / teeth / 4.0;
+   for (i=0;i<teeth;i++) {
+      angle = i * 2.0*M_PI / teeth;
+
+      glVertex3f( r1*cos(angle),      r1*sin(angle),      width*0.5 );
+      glVertex3f( r2*cos(angle+da),   r2*sin(angle+da),   width*0.5 );
+      glVertex3f( r2*cos(angle+2*da), r2*sin(angle+2*da), width*0.5 );
+      glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da), width*0.5 );
+   }
+   glEnd();
+
+
+   glNormal3f( 0.0, 0.0, -1.0 );
+
+   /* draw back face */
+   glBegin( GL_QUAD_STRIP );
+   for (i=0;i<=teeth;i++) {
+      angle = i * 2.0*M_PI / teeth;
+      glVertex3f( r1*cos(angle), r1*sin(angle), -width*0.5 );
+      glVertex3f( r0*cos(angle), r0*sin(angle), -width*0.5 );
+      glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da), -width*0.5 );
+      glVertex3f( r0*cos(angle), r0*sin(angle), -width*0.5 );
+   }
+   glEnd();
+
+   /* draw back sides of teeth */
+   glBegin( GL_QUADS );
+   da = 2.0*M_PI / teeth / 4.0;
+   for (i=0;i<teeth;i++) {
+      angle = i * 2.0*M_PI / teeth;
+
+      glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da), -width*0.5 );
+      glVertex3f( r2*cos(angle+2*da), r2*sin(angle+2*da), -width*0.5 );
+      glVertex3f( r2*cos(angle+da),   r2*sin(angle+da),   -width*0.5 );
+      glVertex3f( r1*cos(angle),      r1*sin(angle),      -width*0.5 );
+   }
+   glEnd();
+
+
+   /* draw outward faces of teeth */
+   glBegin( GL_QUAD_STRIP );
+   for (i=0;i<teeth;i++) {
+      angle = i * 2.0*M_PI / teeth;
+
+      glVertex3f( r1*cos(angle),      r1*sin(angle),       width*0.5 );
+      glVertex3f( r1*cos(angle),      r1*sin(angle),      -width*0.5 );
+      u = r2*cos(angle+da) - r1*cos(angle);
+      v = r2*sin(angle+da) - r1*sin(angle);
+      len = sqrt( u*u + v*v );
+      u /= len;
+      v /= len;
+      glNormal3f( v, -u, 0.0 );
+      glVertex3f( r2*cos(angle+da),   r2*sin(angle+da),    width*0.5 );
+      glVertex3f( r2*cos(angle+da),   r2*sin(angle+da),   -width*0.5 );
+      glNormal3f( cos(angle), sin(angle), 0.0 );
+      glVertex3f( r2*cos(angle+2*da), r2*sin(angle+2*da),  width*0.5 );
+      glVertex3f( r2*cos(angle+2*da), r2*sin(angle+2*da), -width*0.5 );
+      u = r1*cos(angle+3*da) - r2*cos(angle+2*da);
+      v = r1*sin(angle+3*da) - r2*sin(angle+2*da);
+      glNormal3f( v, -u, 0.0 );
+      glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da),  width*0.5 );
+      glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da), -width*0.5 );
+      glNormal3f( cos(angle), sin(angle), 0.0 );
+   }
+
+   glVertex3f( r1*cos(0), r1*sin(0), width*0.5 );
+   glVertex3f( r1*cos(0), r1*sin(0), -width*0.5 );
+
+   glEnd();
+
+
+   glShadeModel( GL_SMOOTH );
+
+   /* draw inside radius cylinder */
+   glBegin( GL_QUAD_STRIP );
+   for (i=0;i<=teeth;i++) {
+      angle = i * 2.0*M_PI / teeth;
+      glNormal3f( -cos(angle), -sin(angle), 0.0 );
+      glVertex3f( r0*cos(angle), r0*sin(angle), -width*0.5 );
+      glVertex3f( r0*cos(angle), r0*sin(angle), width*0.5 );
+   }
+   glEnd();
+      
+}
+
+
+static GLfloat view_rotx=20.0, view_roty=30.0, view_rotz=0.0;
+static GLint gear1, gear2, gear3;
+static GLfloat angle = 0.0;
+
+static GLuint limit;
+static GLuint count = 1;
+
+
+static void draw( void )
+{
+   angle += 2.0;
+
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+   glPushMatrix();
+   glRotatef( view_rotx, 1.0, 0.0, 0.0 );
+   glRotatef( view_roty, 0.0, 1.0, 0.0 );
+   glRotatef( view_rotz, 0.0, 0.0, 1.0 );
+
+   glPushMatrix();
+   glTranslatef( -3.0, -2.0, 0.0 );
+   glRotatef( angle, 0.0, 0.0, 1.0 );
+   glCallList(gear1);
+   glPopMatrix();
+
+   glPushMatrix();
+   glTranslatef( 3.1, -2.0, 0.0 );
+   glRotatef( -2.0*angle-9.0, 0.0, 0.0, 1.0 );
+   glCallList(gear2);
+   glPopMatrix();
+
+   glPushMatrix();
+   glTranslatef( -3.1, 4.2, 0.0 );
+   glRotatef( -2.0*angle-25.0, 0.0, 0.0, 1.0 );
+   glCallList(gear3);
+   glPopMatrix();
+
+   glPopMatrix();
+
+   SVGAMesaSwapBuffers();
+}
+
+
+static void init( void )
+{
+   static GLfloat pos[4] = {5.0, 5.0, 10.0, 1.0 };
+   static GLfloat red[4] = {0.8, 0.1, 0.0, 1.0 };
+   static GLfloat green[4] = {0.0, 0.8, 0.2, 1.0 };
+   static GLfloat blue[4] = {0.2, 0.2, 1.0, 1.0 };
+
+   GLfloat w = (float) width / (float) height;
+   GLfloat h = 1.0;
+
+   glLightfv( GL_LIGHT0, GL_POSITION, pos );
+   glEnable( GL_CULL_FACE );
+   glEnable( GL_LIGHTING );
+   glEnable( GL_LIGHT0 );
+   glEnable( GL_DEPTH_TEST );
+
+   /* make the gears */
+   gear1 = glGenLists(1);
+   glNewList(gear1, GL_COMPILE);
+   glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red );
+   gear( 1.0, 4.0, 1.0, 20, 0.7 );
+   glEndList();
+
+   gear2 = glGenLists(1);
+   glNewList(gear2, GL_COMPILE);
+   glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green );
+   gear( 0.5, 2.0, 2.0, 10, 0.7 );
+   glEndList();
+
+   gear3 = glGenLists(1);
+   glNewList(gear3, GL_COMPILE);
+   glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue );
+   gear( 1.3, 2.0, 0.5, 10, 0.7 );
+   glEndList();
+
+   glEnable( GL_NORMALIZE );
+
+
+   glViewport( 0, 0, width, height );
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   if (width>height) {
+      GLfloat w = (GLfloat) width / (GLfloat) height;
+      glFrustum( -w, w, -1.0, 1.0, 5.0, 60.0 );
+   }
+   else {
+      GLfloat h = (GLfloat) height / (GLfloat) width;
+      glFrustum( -1.0, 1.0, -h, h, 5.0, 60.0 );
+   }
+
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -40.0 );
+}
+
+void setup( void )
+{
+   vga_init();
+
+   vga_setmode(G800x600x32K);
+/*   gl_setcontextvga(G800x600x32K);*/
+
+   vmc = SVGAMesaCreateContext(GL_TRUE);
+   SVGAMesaMakeCurrent( vmc );
+}
+
+
+void end( void )
+{
+   SVGAMesaDestroyContext( vmc );
+
+   vga_setmode( TEXT );
+}
+
+
+int main( int argc, char *argv[] )
+{
+   int i;
+
+   setup();
+   init();
+   for (i=0;i<4;i++) {
+      draw(); /*SVGAMesaSwapBuffers();*/
+   }
+   end();
+   return 0;
+}
diff --git a/progs/xdemos/vindex.c b/progs/xdemos/vindex.c
new file mode 100644
index 00000000000..991fce2a591
--- /dev/null
+++ b/progs/xdemos/vindex.c
@@ -0,0 +1,65 @@
+
+/*
+ * Test Linux 8-bit SVGA/Mesa color index mode
+ *
+ * Compile with:  gcc vindex.c -I../include -L../lib -lMesaGL -lX11 -lXext
+ *   -lvga -lm -o vindex
+ *
+ * This program is in the public domain.
+ * Brian Paul, January 1996
+ */
+
+
+
+#include <vga.h>
+#include "GL/svgamesa.h"
+#include "GL/gl.h"
+
+
+
+static GLint width = 640, height = 480;
+
+
+
+static void display( void )
+{
+   int i, j;
+   int w, h;
+
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho( 0.0, (GLfloat) width, 0.0, (GLfloat) height, -1.0, 1.0 );
+
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   w = width / 16;
+   h = height / 16;
+   for (i=0;i<16;i++) {
+      for (j=0;j<16;j++) {
+         glIndexi( i*16+j );
+         glRecti( i*w, j*h, i*w+w, j*h+h );
+      }
+   }
+}
+
+
+
+int main( int argc, char *argv[] )
+{
+   SVGAMesaContext vmc;
+   int i;
+
+   vga_init();
+   vga_setmode( G640x480x256 );
+
+   vmc = SVGAMesaCreateContext( GL_FALSE );
+   SVGAMesaMakeCurrent( vmc );
+
+   display();
+   sleep(3);
+
+   SVGAMesaDestroyContext( vmc );
+   vga_setmode( TEXT );
+   return 0;
+}
diff --git a/progs/xdemos/vtest.c b/progs/xdemos/vtest.c
new file mode 100644
index 00000000000..e322fbc5c80
--- /dev/null
+++ b/progs/xdemos/vtest.c
@@ -0,0 +1,82 @@
+
+/*
+ * Test SVGA/Mesa interface in 32K color mode.
+ *
+ * Compile with:  gcc vtest.c -I../include -L../lib -lMesaGL -lX11 -lXext
+ *   -lvga -lm -o vtest
+ *
+ * This program is in the public domain.
+ * Brian Paul, January 1996
+ */
+
+
+
+#include <vga.h>
+#include "GL/svgamesa.h"
+#include "GL/gl.h"
+
+
+SVGAMesaContext vmc;
+
+
+
+void setup( void )
+{
+   vga_init();
+
+   vga_setmode(G800x600x32K);
+/*   gl_setcontextvga(G800x600x32K);*/
+
+   vmc = SVGAMesaCreateContext( GL_FALSE );  /* single buffered */
+   SVGAMesaMakeCurrent( vmc );
+}
+
+
+void test( void )
+{
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho( -1.0, 1.0, -1.0, 1.0, -1.0, 1.0 );
+   glMatrixMode(GL_MODELVIEW);
+
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   glBegin( GL_LINES );
+   glColor3f( 1.0, 0.0, 0.0 );
+   glVertex2f( -0.5, 0.5 );
+   glVertex2f(  0.5, 0.5 );
+   glColor3f( 0.0, 1.0, 0.0 );
+   glVertex2f( -0.5, 0.25 );
+   glVertex2f(  0.5, 0.25 );
+   glColor3f( 0.0, 0.0, 1.0 );
+   glVertex2f( -0.5, 0.0 );
+   glVertex2f(  0.5, 0.0 );
+   glEnd();
+
+   glBegin( GL_POLYGON );
+   glColor3f( 1.0, 0.0, 0.0 );
+   glVertex2f( 0.0, 0.7 );
+   glColor3f( 0.0, 1.0, 0.0 );
+   glVertex2f( -0.5, -0.5 );
+   glColor3f( 0.0, 0.0, 1.0 );
+   glVertex2f(  0.5, -0.5 );
+   glEnd();
+
+   sleep(3);
+}
+
+void end( void )
+{
+   SVGAMesaDestroyContext( vmc );
+
+   vga_setmode( TEXT );
+}
+
+
+int main( int argc, char *argv[] )
+{
+   setup();
+   test();
+   end();
+   return 0;
+}
diff --git a/progs/xdemos/wincopy.c b/progs/xdemos/wincopy.c
new file mode 100644
index 00000000000..3ec67dc6724
--- /dev/null
+++ b/progs/xdemos/wincopy.c
@@ -0,0 +1,329 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  6.1
+ * 
+ * Copyright (C) 1999-2004  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * This program opens two GLX windows, renders into one and uses
+ * glCopyPixels to copy the image from the first window into the
+ * second by means of the GLX 1.3 function glxMakeContextCurrent().
+ * This function works just like the glXMakeCurrentReadSGI() function
+ * in the GLX_SGI_make_current_read extension.
+ */
+
+
+#define GLX_GLXEXT_PROTOTYPES
+#include <GL/gl.h>
+#include <GL/glx.h>
+#include <X11/keysym.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+
+#ifdef GLX_VERSION_1_3
+
+
+static Display *Dpy;
+static int ScrNum;
+static GLXContext Context;
+static Window Win[2];  /* Win[0] = source,  Win[1] = dest */
+static GLint Width[2], Height[2];
+
+static GLfloat Angle = 0.0;
+
+static GLboolean DrawFront = GL_FALSE;
+
+PFNGLXMAKECURRENTREADSGIPROC make_context_current = NULL;
+
+static Window
+CreateWindow(Display *dpy, int scrnum, XVisualInfo *visinfo,
+             int xpos, int ypos, int width, int height,
+             const char *name)
+{
+   Window win;
+   XSetWindowAttributes attr;
+   unsigned long mask;
+   Window root;
+
+   root = RootWindow(dpy, scrnum);
+
+   /* window attributes */
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   attr.colormap = XCreateColormap(dpy, root, visinfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+
+   win = XCreateWindow(dpy, root, xpos, ypos, width, height,
+		        0, visinfo->depth, InputOutput,
+		        visinfo->visual, mask, &attr);
+   if (win) {
+      XSizeHints sizehints;
+      sizehints.x = xpos;
+      sizehints.y = ypos;
+      sizehints.width  = width;
+      sizehints.height = height;
+      sizehints.flags = USSize | USPosition;
+      XSetNormalHints(dpy, win, &sizehints);
+      XSetStandardProperties(dpy, win, name, name,
+                              None, (char **)NULL, 0, &sizehints);
+
+      XMapWindow(dpy, win);
+   }
+   return win;
+}
+
+
+static void
+Redraw(void)
+{
+   /* make the first window the current one */
+   if (! (*make_context_current)(Dpy, Win[0], Win[0], Context)) {
+      printf("glXMakeContextCurrent failed in Redraw()\n");
+      return;
+   }
+
+   Angle += 1.0;
+
+   if (DrawFront) {
+      glDrawBuffer(GL_FRONT);
+      glReadBuffer(GL_FRONT);
+   }
+   else {
+      glDrawBuffer(GL_BACK);
+      glReadBuffer(GL_BACK);
+   }
+
+   glViewport(0, 0, Width[0], Height[0]);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
+   glMatrixMode(GL_MODELVIEW);
+
+   glShadeModel(GL_FLAT);
+   glClearColor(0.5, 0.5, 0.5, 1.0);
+   glClear(GL_COLOR_BUFFER_BIT);
+
+   /* draw blue quad */
+   glColor3f(0.3, 0.3, 1.0);
+   glPushMatrix();
+   glRotatef(Angle, 0, 0, 1);
+   glBegin(GL_POLYGON);
+   glVertex2f(-0.5, -0.25);
+   glVertex2f( 0.5, -0.25);
+   glVertex2f( 0.5, 0.25);
+   glVertex2f(-0.5, 0.25);
+   glEnd();
+   glPopMatrix();
+
+   if (DrawFront)
+      glFinish();
+   else
+      glXSwapBuffers(Dpy, Win[0]);
+
+
+   /* copy image from window 0 to window 1 */
+   if (!(*make_context_current)(Dpy, Win[1], Win[0], Context)) {
+      printf("glXMakeContextCurrent failed in Redraw()\n");
+      return;
+   }
+
+   /* raster pos setup */
+   glViewport(0, 0, Width[1], Height[1]);
+   glPushMatrix();
+   glLoadIdentity();
+   glMatrixMode(GL_PROJECTION);
+   glPushMatrix();
+   glLoadIdentity();
+   glOrtho(-1, 1, -1, 1, -1, 1);
+   glRasterPos2f(-1, -1);
+
+   /* copy the image between windows */
+   glCopyPixels(0, 0, Width[0], Height[0], GL_COLOR);
+
+   glPopMatrix();
+   glMatrixMode(GL_MODELVIEW);
+   glPopMatrix();
+
+   if (DrawFront)
+      glFinish();
+   else
+      glXSwapBuffers(Dpy, Win[1]);
+}
+
+
+
+static void
+Resize(Window win, unsigned int width, unsigned int height)
+{
+   int i;
+   if (win == Win[0]) {
+      i = 0;
+   }
+   else {
+      i = 1;
+   }
+   Width[i] = width;
+   Height[i] = height;
+   if (!glXMakeCurrent(Dpy, Win[i], Context)) {
+      printf("glXMakeCurrent failed in Resize()\n");
+      return;
+   }
+}
+
+
+
+static void
+EventLoop(void)
+{
+   XEvent event;
+   while (1) {
+      if (XPending(Dpy) > 0) {
+         XNextEvent( Dpy, &event );
+         switch (event.type) {
+            case Expose:
+               Redraw();
+               break;
+            case ConfigureNotify:
+               Resize(event.xany.window, event.xconfigure.width, event.xconfigure.height);
+               break;
+            case KeyPress:
+               {
+                  char buf[100];
+                  KeySym keySym;
+                  XComposeStatus stat;
+                  XLookupString(&event.xkey, buf, sizeof(buf), &keySym, &stat);
+                  if (keySym == XK_Escape) {
+                        /* exit */
+                        return;
+                  }
+                  else if (buf[0] == 'f') {
+                     DrawFront = !DrawFront;
+                     printf("Drawing to %s buffer\n",
+                            DrawFront ? "GL_FRONT" : "GL_BACK");
+                  }
+               }
+               break;
+            default:
+               /*no-op*/ ;
+         }
+      }
+      else {
+         /* animate */
+         Redraw();
+      }
+   }
+}
+
+
+static void
+Init(void)
+{
+   XVisualInfo *visinfo;
+   int attrib[] = { GLX_RGBA,
+		    GLX_RED_SIZE, 1,
+		    GLX_GREEN_SIZE, 1,
+		    GLX_BLUE_SIZE, 1,
+		    GLX_DOUBLEBUFFER,
+		    None };
+   int major, minor;
+
+   Dpy = XOpenDisplay(NULL);
+   if (!Dpy) {
+      printf("Couldn't open default display!\n");
+      exit(1);
+   }
+
+   ScrNum = DefaultScreen(Dpy);
+
+   glXQueryVersion(Dpy, &major, &minor);
+
+   if (major * 100 + minor >= 103) {
+      make_context_current = (PFNGLXMAKECURRENTREADSGIPROC)
+	  glXGetProcAddressARB( (GLubyte *) "glXMakeContextCurrent" );
+   }
+   else {
+      const char * const glxExtensions = glXQueryExtensionsString(Dpy, ScrNum);
+      const char * ext = strstr( glxExtensions, "GLX_SGI_make_current_read" );
+      const size_t len = strlen( "GLX_SGI_make_current_read" );
+      
+      if ( (ext != NULL) 
+	   && ((ext[len] == ' ') || (ext[len] == '\0')) ) {
+	 make_context_current = (PFNGLXMAKECURRENTREADSGIPROC) 
+	     glXGetProcAddressARB( (GLubyte *) "glXMakeCurrentReadSGI" );
+      }
+   }
+
+   if (make_context_current == NULL) {
+      fprintf(stderr, "Sorry, this program requires either GLX 1.3 "
+	      "or GLX_SGI_make_current_read.\n");
+      exit(1);
+   }
+
+   visinfo = glXChooseVisual(Dpy, ScrNum, attrib);
+   if (!visinfo) {
+      printf("Unable to find RGB, double-buffered visual\n");
+      exit(1);
+   }
+
+   Context = glXCreateContext(Dpy, visinfo, NULL, True);
+   if (!Context) {
+      printf("Couldn't create GLX context\n");
+      exit(1);
+   }
+
+
+   Win[0] = CreateWindow(Dpy, ScrNum, visinfo,
+                         0, 0, 300, 300, "source window");
+
+   Win[1] = CreateWindow(Dpy, ScrNum, visinfo,
+                         350, 0, 300, 300, "dest window");
+
+   printf("Press Esc to exit\n");
+   printf("Press 'f' to toggle front/back buffer drawing\n");
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   Init();
+   EventLoop();
+   return 0;
+}
+
+
+#else
+
+
+int
+main(int argc, char *argv[])
+{
+   printf("This program requires GLX 1.3!\n");
+   return 0;
+}
+
+
+#endif /* GLX_VERSION_1_3 */
diff --git a/progs/xdemos/xdemo.c b/progs/xdemos/xdemo.c
new file mode 100644
index 00000000000..52039cb6424
--- /dev/null
+++ b/progs/xdemos/xdemo.c
@@ -0,0 +1,334 @@
+
+/*
+ * Very simple demo of how to use the Mesa/X11 interface instead of the
+ * glx, tk or aux toolkits.  I highly recommend using the GLX interface
+ * instead of the X/Mesa interface, however.
+ *
+ * This program is in the public domain.
+ *
+ * Brian Paul
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include "GL/xmesa.h"
+#include "GL/gl.h"
+
+
+
+static GLint Black, Red, Green, Blue;
+
+
+
+static void make_window( char *title, int color_flag )
+{
+   int x = 10, y = 10, width = 400, height = 300;
+   Display *dpy;
+   int scr;
+   Window root, win;
+   Colormap cmap;
+   XColor xcolor;
+   int attr_flags;
+   XVisualInfo *visinfo;
+   XSetWindowAttributes attr;
+   XTextProperty tp;
+   XSizeHints sh;
+   XEvent e;
+   XMesaContext context;
+   XMesaVisual visual;
+   XMesaBuffer buffer;
+
+
+   /*
+    * Do the usual X things to make a window.
+    */
+
+   dpy = XOpenDisplay(NULL);
+   if (!dpy) {
+      printf("Couldn't open default display!\n");
+      exit(1);
+   }
+
+   scr = DefaultScreen(dpy);
+   root = RootWindow(dpy, scr);
+
+   /* alloc visinfo struct */
+   visinfo = (XVisualInfo *) malloc( sizeof(XVisualInfo) );
+
+   /* Get a visual and colormap */
+   if (color_flag) {
+      /* Open TrueColor window */
+
+/*
+      if (!XMatchVisualInfo( dpy, scr, 24, TrueColor, visinfo )) {
+	 printf("Couldn't get 24-bit TrueColor visual!\n");
+	 exit(1);
+      }
+*/
+      if (!XMatchVisualInfo( dpy, scr, 8, PseudoColor, visinfo )) {
+	 printf("Couldn't get 8-bit PseudoColor visual!\n");
+	 exit(1);
+      }
+
+      cmap = XCreateColormap( dpy, root, visinfo->visual, AllocNone );
+      Black = Red = Green = Blue = 0;
+   }
+   else {
+      /* Open color index window */
+
+      if (!XMatchVisualInfo( dpy, scr, 8, PseudoColor, visinfo )) {
+	 printf("Couldn't get 8-bit PseudoColor visual\n");
+	 exit(1);
+      }
+
+      cmap = XCreateColormap( dpy, root, visinfo->visual, AllocNone );
+
+      /* Allocate colors */
+      xcolor.red   = 0x0;
+      xcolor.green = 0x0;
+      xcolor.blue  = 0x0;
+      xcolor.flags = DoRed | DoGreen | DoBlue;
+      if (!XAllocColor( dpy, cmap, &xcolor )) {
+	 printf("Couldn't allocate black!\n");
+	 exit(1);
+      }
+      Black = xcolor.pixel;
+
+      xcolor.red   = 0xffff;
+      xcolor.green = 0x0;
+      xcolor.blue  = 0x0;
+      xcolor.flags = DoRed | DoGreen | DoBlue;
+      if (!XAllocColor( dpy, cmap, &xcolor )) {
+	 printf("Couldn't allocate red!\n");
+	 exit(1);
+      }
+      Red = xcolor.pixel;
+
+      xcolor.red   = 0x0;
+      xcolor.green = 0xffff;
+      xcolor.blue  = 0x0;
+      xcolor.flags = DoRed | DoGreen | DoBlue;
+      if (!XAllocColor( dpy, cmap, &xcolor )) {
+	 printf("Couldn't allocate green!\n");
+	 exit(1);
+      }
+      Green = xcolor.pixel;
+
+      xcolor.red   = 0x0;
+      xcolor.green = 0x0;
+      xcolor.blue  = 0xffff;
+      xcolor.flags = DoRed | DoGreen | DoBlue;
+      if (!XAllocColor( dpy, cmap, &xcolor )) {
+	 printf("Couldn't allocate blue!\n");
+	 exit(1);
+      }
+      Blue = xcolor.pixel;
+   }
+
+   /* set window attributes */
+   attr.colormap = cmap;
+   attr.event_mask = ExposureMask | StructureNotifyMask;
+   attr.border_pixel = BlackPixel( dpy, scr );
+   attr.background_pixel = BlackPixel( dpy, scr );
+   attr_flags = CWColormap | CWEventMask | CWBorderPixel | CWBackPixel;
+
+   /* Create the window */
+   win = XCreateWindow( dpy, root, x,y, width, height, 0,
+			    visinfo->depth, InputOutput,
+			    visinfo->visual,
+			    attr_flags, &attr);
+   if (!win) {
+      printf("Couldn't open window!\n");
+      exit(1);
+   }
+
+   XStringListToTextProperty(&title, 1, &tp);
+   sh.flags = USPosition | USSize;
+   XSetWMProperties(dpy, win, &tp, &tp, 0, 0, &sh, 0, 0);
+   XMapWindow(dpy, win);
+   while (1) {
+      XNextEvent( dpy, &e );
+      if (e.type == MapNotify && e.xmap.window == win) {
+	 break;
+      }
+   }
+
+
+   /*
+    * Now do the special Mesa/Xlib stuff!
+    */
+
+   visual = XMesaCreateVisual( dpy, visinfo,
+                              (GLboolean) color_flag,
+                               GL_FALSE,  /* alpha_flag */
+                               GL_FALSE,  /* db_flag */
+                               GL_FALSE,  /* stereo flag */
+                               GL_FALSE,  /* ximage_flag */
+                               0,         /* depth size */
+                               0,         /* stencil size */
+                               0,0,0,0,   /* accum_size */
+                               0,         /* num samples */
+                               0,         /* level */
+                               0          /* caveat */
+                              );
+   if (!visual) {
+      printf("Couldn't create Mesa/X visual!\n");
+      exit(1);
+   }
+
+   /* Create a Mesa rendering context */
+   context = XMesaCreateContext( visual,
+                                 NULL       /* share_list */
+                               );
+   if (!context) {
+      printf("Couldn't create Mesa/X context!\n");
+      exit(1);
+   }
+
+   buffer = XMesaCreateWindowBuffer( visual, win );
+   if (!buffer) {
+      printf("Couldn't create Mesa/X buffer!\n");
+      exit(1);
+   }
+
+
+   XMesaMakeCurrent( context, buffer );
+
+   /* Ready to render! */
+}
+
+
+
+static void draw_cube( void )
+{
+   /* X faces */
+   glIndexi( Red );
+   glColor3f( 1.0, 0.0, 0.0 );
+   glBegin( GL_POLYGON );
+   glVertex3f( 1.0, 1.0, 1.0 );
+   glVertex3f( 1.0, -1.0, 1.0 );
+   glVertex3f( 1.0, -1.0, -1.0 );
+   glVertex3f( 1.0, 1.0, -1.0 );
+   glEnd();
+
+   glBegin( GL_POLYGON );
+   glVertex3f( -1.0, 1.0, 1.0 );
+   glVertex3f( -1.0, 1.0, -1.0 );
+   glVertex3f( -1.0, -1.0, -1.0 );
+   glVertex3f( -1.0, -1.0, 1.0 );
+   glEnd();
+
+   /* Y faces */
+   glIndexi( Green );
+   glColor3f( 0.0, 1.0, 0.0 );
+   glBegin( GL_POLYGON );
+   glVertex3f(  1.0, 1.0,  1.0 );
+   glVertex3f(  1.0, 1.0, -1.0 );
+   glVertex3f( -1.0, 1.0, -1.0 );
+   glVertex3f( -1.0, 1.0,  1.0 );
+   glEnd();
+
+   glBegin( GL_POLYGON );
+   glVertex3f(  1.0, -1.0,  1.0 );
+   glVertex3f( -1.0, -1.0,  1.0 );
+   glVertex3f( -1.0, -1.0, -1.0 );
+   glVertex3f(  1.0, -1.0, -1.0 );
+   glEnd();
+
+   /* Z faces */
+   glIndexi( Blue );
+   glColor3f( 0.0, 0.0, 1.0 );
+   glBegin( GL_POLYGON );
+   glVertex3f(  1.0,  1.0,  1.0 );
+   glVertex3f( -1.0,  1.0,  1.0 );
+   glVertex3f( -1.0, -1.0,  1.0 );
+   glVertex3f(  1.0, -1.0,  1.0 );
+   glEnd();
+
+   glBegin( GL_POLYGON );
+   glVertex3f(  1.0, 1.0, -1.0 );
+   glVertex3f(  1.0,-1.0, -1.0 );
+   glVertex3f( -1.0,-1.0, -1.0 );
+   glVertex3f( -1.0, 1.0, -1.0 );
+   glEnd();
+}
+
+
+
+
+static void display_loop( void )
+{
+   GLfloat xrot, yrot, zrot;
+
+   xrot = yrot = zrot = 0.0;
+
+   glClearColor( 0.0, 0.0, 0.0, 0.0 );
+   glClearIndex( Black );
+
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glFrustum( -1.0, 1.0,  -1.0, 1.0,  1.0, 10.0 );
+   glTranslatef( 0.0, 0.0, -5.0 );
+
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+
+   glCullFace( GL_BACK );
+   glEnable( GL_CULL_FACE );
+
+   glShadeModel( GL_FLAT );
+
+   while (1) {
+      glClear( GL_COLOR_BUFFER_BIT );
+      glPushMatrix();
+      glRotatef( xrot, 1.0, 0.0, 0.0 );
+      glRotatef( yrot, 0.0, 1.0, 0.0 );
+      glRotatef( zrot, 0.0, 0.0, 1.0 );
+
+      draw_cube();
+
+      glPopMatrix();
+      glFinish();
+
+      xrot += 10.0;
+      yrot += 7.0;
+      zrot -= 3.0;
+   }
+
+}
+
+
+
+
+int main( int argc, char *argv[] )
+{
+   int mode = 0;
+
+   if (argc >= 2)
+   {
+        if (strcmp(argv[1],"-ci")==0)
+           mode = 0;
+        else if (strcmp(argv[1],"-rgb")==0)
+           mode = 1;
+        else
+        {
+           printf("Bad flag: %s\n", argv[1]);
+           printf("Specify -ci for 8-bit color index or -rgb for RGB mode\n");
+           exit(1);
+        }
+   }
+   else
+   {
+        printf("Specify -ci for 8-bit color index or -rgb for RGB mode\n");
+        printf("Defaulting to  8-bit color index\n");
+   }
+
+   make_window( argv[0], mode );
+
+   display_loop();
+   return 0;
+}
+
diff --git a/progs/xdemos/xfont.c b/progs/xdemos/xfont.c
new file mode 100644
index 00000000000..2585aa6447c
--- /dev/null
+++ b/progs/xdemos/xfont.c
@@ -0,0 +1,206 @@
+
+/*
+ * Mesa 3-D graphics library
+ * 
+ * Copyright (C) 1999  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * Example of using glXUseXFont().
+ * 5 November 1999
+ * Brian Paul
+ */
+
+
+#include <GL/gl.h>
+#include <GL/glx.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+static const char *ProgramName = "xfont";
+
+static const char *FontName = "fixed";
+
+static GLuint FontBase = 0;
+
+
+
+static void redraw( Display *dpy, Window w )
+{
+   static const char *text = "This is glXUseXFont()";
+
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   /* triangle */
+   glColor3f( 0.2, 0.2, 1.0 );
+   glBegin(GL_TRIANGLES);
+   glVertex2f( 0, 0.8 );
+   glVertex2f( -0.8, -0.7 );
+   glVertex2f( 0.8, -0.7 );
+   glEnd();
+
+   /* text */
+   glColor3f( 1, 1, 1 );
+   glRasterPos2f(-0.8, 0); 
+   glListBase(FontBase);
+   glCallLists(strlen(text), GL_UNSIGNED_BYTE, (GLubyte *) text);
+
+   glXSwapBuffers( dpy, w );
+}
+
+
+
+static void resize( unsigned int width, unsigned int height )
+{
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho( -1.0, 1.0, -1.0, 1.0, -1.0, 1.0 );
+}
+
+
+
+static void setup_font( Display *dpy )
+{
+    XFontStruct *fontInfo;
+    Font id;
+    unsigned int first, last;
+
+    fontInfo = XLoadQueryFont(dpy, FontName);
+    if (!fontInfo) {
+        printf("Error: font %s not found\n", FontName);
+	exit(0);
+    }
+
+    id = fontInfo->fid;
+    first = fontInfo->min_char_or_byte2;
+    last = fontInfo->max_char_or_byte2;
+
+    FontBase = glGenLists((GLuint) last + 1);
+    if (!FontBase) {
+        printf("Error: unable to allocate display lists\n");
+	exit(0);
+    }
+    glXUseXFont(id, first, last - first + 1, FontBase + first);
+}
+
+static Window make_rgb_db_window( Display *dpy, int xpos, int ypos,
+				  unsigned int width, unsigned int height )
+{
+   int attrib[] = { GLX_RGBA,
+		    GLX_RED_SIZE, 1,
+		    GLX_GREEN_SIZE, 1,
+		    GLX_BLUE_SIZE, 1,
+		    GLX_DOUBLEBUFFER,
+		    None };
+   int scrnum;
+   XSetWindowAttributes attr;
+   unsigned long mask;
+   Window root;
+   Window win;
+   GLXContext ctx;
+   XVisualInfo *visinfo;
+
+   scrnum = DefaultScreen( dpy );
+   root = RootWindow( dpy, scrnum );
+
+   visinfo = glXChooseVisual( dpy, scrnum, attrib );
+   if (!visinfo) {
+      printf("Error: couldn't get an RGB, Double-buffered visual\n");
+      exit(1);
+   }
+
+   /* window attributes */
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+
+   win = XCreateWindow( dpy, root, 0, 0, width, height,
+		        0, visinfo->depth, InputOutput,
+		        visinfo->visual, mask, &attr );
+
+   {
+      XSizeHints sizehints;
+      sizehints.x = xpos;
+      sizehints.y = ypos;
+      sizehints.width  = width;
+      sizehints.height = height;
+      sizehints.flags = USSize | USPosition;
+      XSetNormalHints(dpy, win, &sizehints);
+      XSetStandardProperties(dpy, win, ProgramName, ProgramName,
+                              None, (char **)NULL, 0, &sizehints);
+   }
+
+
+   ctx = glXCreateContext( dpy, visinfo, NULL, True );
+
+   glXMakeCurrent( dpy, win, ctx );
+
+   return win;
+}
+
+
+static void event_loop( Display *dpy )
+{
+   XEvent event;
+
+   while (1) {
+      XNextEvent( dpy, &event );
+
+      switch (event.type) {
+	 case Expose:
+	    redraw( dpy, event.xany.window );
+	    break;
+	 case ConfigureNotify:
+	    resize( event.xconfigure.width, event.xconfigure.height );
+	    break;
+         case KeyPress:
+            exit(0);
+         default:
+            ;  /* no-op */
+      }
+   }
+}
+
+
+
+int main( int argc, char *argv[] )
+{
+   Display *dpy;
+   Window win;
+
+   dpy = XOpenDisplay(NULL);
+
+   win = make_rgb_db_window( dpy, 0, 0, 300, 300 );
+   setup_font( dpy );
+
+   glShadeModel( GL_FLAT );
+   glClearColor( 0.5, 0.5, 1.0, 1.0 );
+
+   XMapWindow( dpy, win );
+
+   event_loop( dpy );
+   return 0;
+}
diff --git a/progs/xdemos/xrotfontdemo.c b/progs/xdemos/xrotfontdemo.c
new file mode 100644
index 00000000000..58cd0286cc6
--- /dev/null
+++ b/progs/xdemos/xrotfontdemo.c
@@ -0,0 +1,220 @@
+/*
+ * Mesa 3-D graphics library
+ * 
+ * Copyright (C) 1999  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * Example of using glXUseRotatedXFontMESA().
+ * 24 Jan 2004
+ * Brian Paul
+ */
+
+
+#include <GL/gl.h>
+#include <GL/glx.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "xuserotfont.h"
+
+
+static const char *ProgramName = "xfont";
+
+static const char *FontName = "fixed";
+
+static GLuint FontBase[4];
+
+
+static void redraw( Display *dpy, Window w )
+{
+   static const char *text = "  Rotated bitmap text";
+   int i;
+
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   /* triangle */
+   glColor3f( 0.2, 0.2, 1.0 );
+   glBegin(GL_TRIANGLES);
+   glVertex2f( -0.8,  0.7 );
+   glVertex2f( -0.8, -0.7 );
+   glVertex2f(  0.8,  0.0 );
+   glEnd();
+
+   /* marker */
+   glColor3f( 0, 1, 0 );
+   glBegin(GL_POINTS);
+   glVertex2f(0, 0);
+   glEnd();
+
+   /* text */
+   glColor3f( 1, 1, 1 );
+
+   for (i = 0; i < 4; i++) {
+      glRasterPos2f(0, 0); 
+      glListBase(FontBase[i]);
+      glCallLists(strlen(text), GL_UNSIGNED_BYTE, (GLubyte *) text);
+   }
+
+   glXSwapBuffers( dpy, w );
+}
+
+
+
+static void resize( unsigned int width, unsigned int height )
+{
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho( -1.0, 1.0, -1.0, 1.0, -1.0, 1.0 );
+}
+
+
+
+static void setup_font( Display *dpy )
+{
+    XFontStruct *fontInfo;
+    Font id;
+    unsigned int first, last;
+    int i;
+
+    fontInfo = XLoadQueryFont(dpy, FontName);
+    if (!fontInfo) {
+        printf("Error: font %s not found\n", FontName);
+	exit(0);
+    }
+
+    id = fontInfo->fid;
+    first = fontInfo->min_char_or_byte2;
+    last = fontInfo->max_char_or_byte2;
+
+    for (i = 0; i < 4; i++) {
+       FontBase[i] = glGenLists((GLuint) last + 1);
+       if (!FontBase[i]) {
+          printf("Error: unable to allocate display lists\n");
+          exit(0);
+       }
+       glXUseRotatedXFontMESA(id, first, last - first + 1, FontBase[i] + first,
+                              i * 90);
+    }
+}
+
+
+static Window make_rgb_db_window( Display *dpy, int xpos, int ypos,
+				  unsigned int width, unsigned int height )
+{
+   int attrib[] = { GLX_RGBA,
+		    GLX_RED_SIZE, 1,
+		    GLX_GREEN_SIZE, 1,
+		    GLX_BLUE_SIZE, 1,
+		    GLX_DOUBLEBUFFER,
+		    None };
+   int scrnum;
+   XSetWindowAttributes attr;
+   unsigned long mask;
+   Window root;
+   Window win;
+   GLXContext ctx;
+   XVisualInfo *visinfo;
+
+   scrnum = DefaultScreen( dpy );
+   root = RootWindow( dpy, scrnum );
+
+   visinfo = glXChooseVisual( dpy, scrnum, attrib );
+   if (!visinfo) {
+      printf("Error: couldn't get an RGB, Double-buffered visual\n");
+      exit(1);
+   }
+
+   /* window attributes */
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+
+   win = XCreateWindow( dpy, root, 0, 0, width, height,
+		        0, visinfo->depth, InputOutput,
+		        visinfo->visual, mask, &attr );
+
+   {
+      XSizeHints sizehints;
+      sizehints.x = xpos;
+      sizehints.y = ypos;
+      sizehints.width  = width;
+      sizehints.height = height;
+      sizehints.flags = USSize | USPosition;
+      XSetNormalHints(dpy, win, &sizehints);
+      XSetStandardProperties(dpy, win, ProgramName, ProgramName,
+                              None, (char **)NULL, 0, &sizehints);
+   }
+
+
+   ctx = glXCreateContext( dpy, visinfo, NULL, True );
+
+   glXMakeCurrent( dpy, win, ctx );
+
+   return win;
+}
+
+
+static void event_loop( Display *dpy )
+{
+   XEvent event;
+
+   while (1) {
+      XNextEvent( dpy, &event );
+
+      switch (event.type) {
+	 case Expose:
+	    redraw( dpy, event.xany.window );
+	    break;
+	 case ConfigureNotify:
+	    resize( event.xconfigure.width, event.xconfigure.height );
+	    break;
+         case KeyPress:
+            exit(0);
+         default:
+            ;  /* no-op */
+      }
+   }
+}
+
+
+
+int main( int argc, char *argv[] )
+{
+   Display *dpy;
+   Window win;
+
+   dpy = XOpenDisplay(NULL);
+
+   win = make_rgb_db_window( dpy, 0, 0, 300, 300 );
+   setup_font( dpy );
+
+   glShadeModel( GL_FLAT );
+   glClearColor( 0.5, 0.5, 1.0, 1.0 );
+
+   XMapWindow( dpy, win );
+
+   event_loop( dpy );
+   return 0;
+}
diff --git a/progs/xdemos/xuserotfont.c b/progs/xdemos/xuserotfont.c
new file mode 100644
index 00000000000..adb849511d8
--- /dev/null
+++ b/progs/xdemos/xuserotfont.c
@@ -0,0 +1,399 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  6.1
+ *
+ * Copyright (C) 1999-2004  Brian Paul   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/* \file xuserotfont.c
+ *
+ * A function like glXUseXFont() but takes a 0, 90, 180 or 270 degree
+ * rotation angle for rotated text display.
+ *
+ * Based on Mesa's glXUseXFont implementation written by Thorsten Ohl.
+ */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+#include <GL/glx.h>
+#include "xuserotfont.h"
+
+
+/**
+ * Generate OpenGL-compatible bitmap by drawing an X character glyph
+ * to an off-screen pixmap, then getting the image and testing pixels.
+ * \param width  bitmap width in pixels
+ * \param height  bitmap height in pixels
+ */
+static void
+fill_bitmap(Display *dpy, Pixmap pixmap, GC gc,
+	    unsigned int bitmapWidth, unsigned int bitmapHeight,
+            unsigned int charWidth, unsigned int charHeight,
+	    int xPos, int yPos, unsigned int c, GLubyte * bitmap,
+            int rotation)
+{
+   const int bytesPerRow = (bitmapWidth + 7) / 8;
+   XImage *image;
+   XChar2b char2b;
+
+   /* clear pixmap to 0 */
+   XSetForeground(dpy, gc, 0);
+   XFillRectangle(dpy, pixmap, gc, 0, 0, charWidth, charHeight);
+
+   /* The glyph is drawn snug up against the left/top edges of the pixmap */
+   XSetForeground(dpy, gc, 1);
+   char2b.byte1 = (c >> 8) & 0xff;
+   char2b.byte2 = (c & 0xff);
+   XDrawString16(dpy, pixmap, gc, xPos, yPos, &char2b, 1);
+
+   /* initialize GL bitmap */
+   memset(bitmap, 0, bytesPerRow * bitmapHeight);
+
+   image = XGetImage(dpy, pixmap, 0, 0, charWidth, charHeight, 1, XYPixmap);
+   if (image) {
+      /* Set appropriate bits in the GL bitmap.
+       * Note: X11 and OpenGL are upside down wrt each other).
+       */
+      unsigned int x, y;
+      if (rotation == 0) {
+         for (y = 0; y < charHeight; y++) {
+            for (x = 0; x < charWidth; x++) {
+               if (XGetPixel(image, x, y)) {
+                  int y2 = bitmapHeight - y - 1;
+                  bitmap[bytesPerRow * y2 + x / 8] |= (1 << (7 - (x % 8)));
+               }
+            }
+         }
+      }
+      else if (rotation == 90) {
+         for (y = 0; y < charHeight; y++) {
+            for (x = 0; x < charWidth; x++) {
+               if (XGetPixel(image, x, y)) {
+                  int x2 = y;
+                  int y2 = x;
+                  bitmap[bytesPerRow * y2 + x2 / 8] |= (1 << (7 - (x2 % 8)));
+               }
+            }
+         }
+      }
+      else if (rotation == 180) {
+         for (y = 0; y < charHeight; y++) {
+            for (x = 0; x < charWidth; x++) {
+               if (XGetPixel(image, x, y)) {
+                  int x2 = charWidth - x - 1;
+                  bitmap[bytesPerRow * y + x2 / 8] |= (1 << (7 - (x2 % 8)));
+               }
+            }
+         }
+      }
+      else {
+         assert(rotation == 270);
+         for (y = 0; y < charHeight; y++) {
+            for (x = 0; x < charWidth; x++) {
+               if (XGetPixel(image, x, y)) {
+                  int x2 = charHeight - y - 1;
+                  int y2 = charWidth - x - 1;
+                  bitmap[bytesPerRow * y2 + x2 / 8] |= (1 << (7 - (x2 % 8)));
+               }
+            }
+         }
+      }
+      XDestroyImage(image);
+   }
+}
+
+
+/*
+ * Determine if a given glyph is valid and return the
+ * corresponding XCharStruct.
+ */
+static const XCharStruct *
+isvalid(const XFontStruct * fs, unsigned int which)
+{
+   unsigned int rows, pages;
+   unsigned int byte1 = 0, byte2 = 0;
+   int i, valid = 1;
+
+   rows = fs->max_byte1 - fs->min_byte1 + 1;
+   pages = fs->max_char_or_byte2 - fs->min_char_or_byte2 + 1;
+
+   if (rows == 1) {
+      /* "linear" fonts */
+      if ((fs->min_char_or_byte2 > which) || (fs->max_char_or_byte2 < which))
+	 valid = 0;
+   }
+   else {
+      /* "matrix" fonts */
+      byte2 = which & 0xff;
+      byte1 = which >> 8;
+      if ((fs->min_char_or_byte2 > byte2) ||
+	  (fs->max_char_or_byte2 < byte2) ||
+	  (fs->min_byte1 > byte1) || (fs->max_byte1 < byte1))
+	 valid = 0;
+   }
+
+   if (valid) {
+      if (fs->per_char) {
+	 if (rows == 1) {
+	    /* "linear" fonts */
+	    return fs->per_char + (which - fs->min_char_or_byte2);
+	 }
+	 else {
+	    /* "matrix" fonts */
+	    i = ((byte1 - fs->min_byte1) * pages) +
+	       (byte2 - fs->min_char_or_byte2);
+	    return fs->per_char + i;
+	 }
+      }
+      else {
+	 return &fs->min_bounds;
+      }
+   }
+   return NULL;
+}
+
+
+void
+glXUseRotatedXFontMESA(Font font, int first, int count, int listbase,
+                       int rotation)
+{
+   Display *dpy;
+   Window win;
+   Pixmap pixmap;
+   GC gc;
+   XFontStruct *fs;
+   GLint swapbytes, lsbfirst, rowlength;
+   GLint skiprows, skippixels, alignment;
+   unsigned int maxCharWidth, maxCharHeight;
+   GLubyte *bm;
+   int i;
+
+   if (rotation != 0 &&
+       rotation != 90 &&
+       rotation != 180 &&
+       rotation != 270)
+      return;
+
+   dpy = glXGetCurrentDisplay();
+   if (!dpy)
+      return;			/* I guess glXMakeCurrent wasn't called */
+   win = RootWindow(dpy, DefaultScreen(dpy));
+
+   fs = XQueryFont(dpy, font);
+   if (!fs) {
+      /*
+      _mesa_error(NULL, GL_INVALID_VALUE,
+		  "Couldn't get font structure information");
+      */
+      return;
+   }
+
+   /* Allocate a GL bitmap that can fit any character */
+   maxCharWidth = fs->max_bounds.rbearing - fs->min_bounds.lbearing;
+   maxCharHeight = fs->max_bounds.ascent + fs->max_bounds.descent;
+   /* use max, in case we're rotating */
+   if (rotation == 90 || rotation == 270) {
+      /* swap width/height */
+      bm = (GLubyte *) malloc((maxCharHeight + 7) / 8 * maxCharWidth);
+   }
+   else {
+      /* normal or upside down */
+      bm = (GLubyte *) malloc((maxCharWidth + 7) / 8 * maxCharHeight);
+   }
+   if (!bm) {
+      XFreeFontInfo(NULL, fs, 1);
+      /*
+      _mesa_error(NULL, GL_OUT_OF_MEMORY,
+		  "Couldn't allocate bitmap in glXUseXFont()");
+      */
+      return;
+   }
+
+#if 0
+   /* get the page info */
+   pages = fs->max_char_or_byte2 - fs->min_char_or_byte2 + 1;
+   firstchar = (fs->min_byte1 << 8) + fs->min_char_or_byte2;
+   lastchar = (fs->max_byte1 << 8) + fs->max_char_or_byte2;
+   rows = fs->max_byte1 - fs->min_byte1 + 1;
+   unsigned int first_char, last_char, pages, rows;
+#endif
+
+   /* Save the current packing mode for bitmaps.  */
+   glGetIntegerv(GL_UNPACK_SWAP_BYTES, &swapbytes);
+   glGetIntegerv(GL_UNPACK_LSB_FIRST, &lsbfirst);
+   glGetIntegerv(GL_UNPACK_ROW_LENGTH, &rowlength);
+   glGetIntegerv(GL_UNPACK_SKIP_ROWS, &skiprows);
+   glGetIntegerv(GL_UNPACK_SKIP_PIXELS, &skippixels);
+   glGetIntegerv(GL_UNPACK_ALIGNMENT, &alignment);
+
+   /* Enforce a standard packing mode which is compatible with
+      fill_bitmap() from above.  This is actually the default mode,
+      except for the (non)alignment.  */
+   glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
+   glPixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE);
+   glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+   glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
+   glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+   /* Create pixmap and GC */
+   pixmap = XCreatePixmap(dpy, win, maxCharWidth, maxCharHeight, 1);
+   {
+      XGCValues values;
+      unsigned long valuemask;
+      values.foreground = BlackPixel(dpy, DefaultScreen(dpy));
+      values.background = WhitePixel(dpy, DefaultScreen(dpy));
+      values.font = fs->fid;
+      valuemask = GCForeground | GCBackground | GCFont;
+      gc = XCreateGC(dpy, pixmap, valuemask, &values);
+   }
+
+#ifdef DEBUG_XROT
+   if (debug_xfonts)
+      dump_font_struct(fs);
+#endif
+
+   for (i = 0; i < count; i++) {
+      const unsigned int c = first + i;
+      const int list = listbase + i;
+      unsigned int charWidth, charHeight;
+      unsigned int bitmapWidth = 0, bitmapHeight = 0;
+      GLfloat xOrig, yOrig, xStep, yStep, dtemp;
+      const XCharStruct *ch;
+      int xPos, yPos;
+      int valid;
+
+      /* check on index validity and get the bounds */
+      ch = isvalid(fs, c);
+      if (!ch) {
+	 ch = &fs->max_bounds;
+	 valid = 0;
+      }
+      else {
+	 valid = 1;
+      }
+
+#ifdef DEBUG_XROT
+      if (debug_xfonts) {
+	 char s[7];
+	 sprintf(s, isprint(c) ? "%c> " : "\\%03o> ", c);
+	 dump_char_struct(ch, s);
+      }
+#endif
+
+      /* glBitmap()' parameters:
+         straight from the glXUseXFont(3) manpage.  */
+      charWidth = ch->rbearing - ch->lbearing;
+      charHeight = ch->ascent + ch->descent;
+      xOrig = -ch->lbearing;
+      yOrig = ch->descent;
+      xStep = ch->width;
+      yStep = 0;
+
+      /* X11's starting point.  */
+      xPos = -ch->lbearing;
+      yPos = ch->ascent;
+
+      /* Apply rotation */
+      switch (rotation) {
+      case 0:
+         /* nothing */
+         bitmapWidth = charWidth;
+         bitmapHeight = charHeight;
+         break;
+      case 90:
+         /* xStep, yStep */
+         dtemp = xStep;
+         xStep = -yStep;
+         yStep = dtemp;
+         /* xOrig, yOrig */
+         yOrig = xOrig;
+         xOrig = charHeight - (charHeight - yPos);
+         /* width, height */
+         bitmapWidth = charHeight;
+         bitmapHeight = charWidth;
+         break;
+      case 180:
+         /* xStep, yStep */
+         xStep = -xStep;
+         yStep = -yStep;
+         /* xOrig, yOrig */
+         xOrig = charWidth - xOrig - 1;
+         yOrig = charHeight - yOrig - 1;
+         bitmapWidth = charWidth;
+         bitmapHeight = charHeight;
+         break;
+      case 270:
+         /* xStep, yStep */
+         dtemp = xStep;
+         xStep = yStep;
+         yStep = -dtemp;
+         /* xOrig, yOrig */
+         dtemp = yOrig;
+         yOrig = charWidth - xOrig;
+         xOrig = dtemp;
+         /* width, height */
+         bitmapWidth = charHeight;
+         bitmapHeight = charWidth;
+         break;
+      default:
+         /* should never get here */
+         ;
+      }
+
+      glNewList(list, GL_COMPILE);
+      if (valid && bitmapWidth > 0 && bitmapHeight > 0) {
+
+	 fill_bitmap(dpy, pixmap, gc, bitmapWidth, bitmapHeight,
+                     charWidth, charHeight,
+                     xPos, yPos, c, bm, rotation);
+
+	 glBitmap(bitmapWidth, bitmapHeight, xOrig, yOrig, xStep, yStep, bm);
+
+#ifdef DEBUG_XROT
+	 if (debug_xfonts) {
+	    printf("width/height = %u/%u\n", bitmapWidth, bitmapHeight);
+	    dump_bitmap(bitmapWidth, bitmapHeight, bm);
+	 }
+#endif
+      }
+      else {
+	 glBitmap(0, 0, 0.0, 0.0, xStep, yStep, NULL);
+      }
+      glEndList();
+   }
+
+   free(bm);
+   XFreeFontInfo(NULL, fs, 1);
+   XFreePixmap(dpy, pixmap);
+   XFreeGC(dpy, gc);
+
+   /* Restore saved packing modes.  */
+   glPixelStorei(GL_UNPACK_SWAP_BYTES, swapbytes);
+   glPixelStorei(GL_UNPACK_LSB_FIRST, lsbfirst);
+   glPixelStorei(GL_UNPACK_ROW_LENGTH, rowlength);
+   glPixelStorei(GL_UNPACK_SKIP_ROWS, skiprows);
+   glPixelStorei(GL_UNPACK_SKIP_PIXELS, skippixels);
+   glPixelStorei(GL_UNPACK_ALIGNMENT, alignment);
+}
+
+
diff --git a/progs/xdemos/xuserotfont.h b/progs/xdemos/xuserotfont.h
new file mode 100644
index 00000000000..ea49203b7b9
--- /dev/null
+++ b/progs/xdemos/xuserotfont.h
@@ -0,0 +1,12 @@
+#ifndef XUSEROTFONT_H
+#define XUSEROTFONT_H
+
+#include <X11/Xlib.h>
+
+
+extern void
+glXUseRotatedXFontMESA(Font font, int first, int count, int listbase,
+                       int rotation);
+
+
+#endif
diff --git a/progs/xdemos/yuvrect_client.c b/progs/xdemos/yuvrect_client.c
new file mode 100644
index 00000000000..48f82cb7599
--- /dev/null
+++ b/progs/xdemos/yuvrect_client.c
@@ -0,0 +1,326 @@
+/*
+ * Test the GL_NV_texture_rectangle and GL_MESA_ycrcb_texture extensions and GLX_MESA_allocate-memory
+ *
+ * Dave Airlie - Feb 2005
+ */
+
+#include <assert.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <X11/Xlib.h>
+#include <X11/keysym.h>
+#define GL_GLEXT_PROTOTYPES
+#include <GL/glx.h>
+
+#include "../util/readtex.c"   /* I know, this is a hack. */
+
+#define TEXTURE_FILE "../images/girl2.rgb"
+
+static GLfloat Xrot = 0, Yrot = 0, Zrot = 0;
+static GLint ImgWidth, ImgHeight;
+static GLushort *ImageYUV = NULL;
+static void *glx_memory;
+
+static void DrawObject(void)
+{
+   glBegin(GL_QUADS);
+
+   glTexCoord2f(0, 0);
+   glVertex2f(-1.0, -1.0);
+
+   glTexCoord2f(ImgWidth, 0);
+   glVertex2f(1.0, -1.0);
+
+   glTexCoord2f(ImgWidth, ImgHeight);
+   glVertex2f(1.0, 1.0);
+
+   glTexCoord2f(0, ImgHeight);
+   glVertex2f(-1.0, 1.0);
+
+   glEnd();
+}
+
+
+static void scr_Display( void )
+{
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   glPushMatrix();
+      glRotatef(Xrot, 1.0, 0.0, 0.0);
+      glRotatef(Yrot, 0.0, 1.0, 0.0);
+      glRotatef(Zrot, 0.0, 0.0, 1.0);
+      DrawObject();
+   glPopMatrix();
+
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glFrustum( -1.0, 1.0, -1.0, 1.0, 10.0, 100.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -15.0 );
+}
+
+static int queryClient(Display *dpy, int screen)
+{
+#ifdef GLX_MESA_allocate_memory
+  char *extensions;
+
+  extensions = (char *)glXQueryExtensionsString(dpy, screen);
+  if (!extensions || !strstr(extensions,"GLX_MESA_allocate_memory")) {
+    return 0;
+  }
+
+  return 1;
+#else
+  return 0;
+#endif
+}
+
+static int
+query_extension(char* extName) {
+    char *p = (char *) glGetString(GL_EXTENSIONS);
+    char *end = p + strlen(p);
+    while (p < end) {
+        int n = strcspn(p, " ");
+        if ((strlen(extName) == n) && (strncmp(extName, p, n) == 0))
+            return GL_TRUE;
+        p += (n + 1);
+    }
+    return GL_FALSE;
+}
+
+static void Init( int argc, char *argv[] , Display *dpy, int screen, Window win)
+{
+   GLuint texObj = 100;
+   const char *file;
+   void *glx_memory;
+
+   if (!query_extension("GL_NV_texture_rectangle")) {
+      printf("Sorry, GL_NV_texture_rectangle is required\n");
+      exit(0);
+   }
+
+   if (!query_extension("GL_MESA_ycbcr_texture")) {
+      printf("Sorry, GL_MESA_ycbcr_texture is required\n");
+      exit(0);
+   }
+
+   if (!queryClient(dpy, screen)) {
+     printf("Sorry, GLX_MESA_allocate_memory is required\n");
+     exit(0);
+   }
+
+   glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, 1);
+   glBindTexture(GL_TEXTURE_RECTANGLE_NV, texObj);
+#ifdef LINEAR_FILTER
+   /* linear filtering looks much nicer but is much slower for Mesa */
+   glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+   glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+#else
+   glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+   glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+#endif
+
+   if (argc > 1)
+      file = argv[1];
+   else
+      file = TEXTURE_FILE;
+
+   ImageYUV = LoadYUVImage(file, &ImgWidth, &ImgHeight);
+   if (!ImageYUV) {
+      printf("Couldn't read %s\n", TEXTURE_FILE);
+      exit(0);
+   }
+   
+   glx_memory = glXAllocateMemoryMESA(dpy, screen, ImgWidth * ImgHeight * 2, 0, 0 ,0);
+   if (!glx_memory)
+   {
+     fprintf(stderr,"Failed to allocate MESA memory\n");
+     exit(-1);
+   }
+   
+   memcpy(glx_memory, ImageYUV, ImgWidth * ImgHeight * 2);
+   
+   printf("Image: %dx%d\n", ImgWidth, ImgHeight);
+
+   glTexImage2D(GL_TEXTURE_RECTANGLE_NV, 0,
+                GL_YCBCR_MESA, ImgWidth, ImgHeight, 0,
+                GL_YCBCR_MESA, GL_UNSIGNED_SHORT_8_8_APPLE, glx_memory);
+
+   assert(glGetError() == GL_NO_ERROR);
+
+   glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+
+   glEnable(GL_TEXTURE_RECTANGLE_NV);
+
+   glShadeModel(GL_FLAT);
+   glClearColor(0.3, 0.3, 0.4, 1.0);
+
+}
+
+/*
+ * Create an RGB, double-buffered window.
+ * Return the window and context handles.
+ */
+static void
+make_window( Display *dpy, const char *name,
+             int x, int y, int width, int height,
+             Window *winRet, GLXContext *ctxRet)
+{
+   int attribs[] = { GLX_RGBA,
+                     GLX_RED_SIZE, 1,
+                     GLX_GREEN_SIZE, 1,
+                     GLX_BLUE_SIZE, 1,
+                     GLX_DOUBLEBUFFER,
+                     GLX_DEPTH_SIZE, 1,
+                     None };
+   int scrnum;
+   XSetWindowAttributes attr;
+   unsigned long mask;
+   Window root;
+   Window win;
+   GLXContext ctx;
+   XVisualInfo *visinfo;
+
+   scrnum = DefaultScreen( dpy );
+   root = RootWindow( dpy, scrnum );
+   
+   visinfo = glXChooseVisual( dpy, scrnum, attribs );
+   if (!visinfo) {
+     printf("Error: couldn't get an RGB, Double-buffered visual\n");
+     exit(1);
+   }
+
+   /* window attributes */
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
+   attr.override_redirect = 0;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask | CWOverrideRedirect;
+
+   win = XCreateWindow( dpy, root, 0, 0, width, height,
+		        0, visinfo->depth, InputOutput,
+		        visinfo->visual, mask, &attr );
+
+   /* set hints and properties */
+   {
+      XSizeHints sizehints;
+      sizehints.x = x;
+      sizehints.y = y;
+      sizehints.width  = width;
+      sizehints.height = height;
+      sizehints.flags = USSize | USPosition;
+      XSetNormalHints(dpy, win, &sizehints);
+      XSetStandardProperties(dpy, win, name, name,
+                              None, (char **)NULL, 0, &sizehints);
+   }
+
+   ctx = glXCreateContext( dpy, visinfo, NULL, True );
+   if (!ctx) {
+      printf("Error: glXCreateContext failed\n");
+      exit(1);
+   }
+
+   XFree(visinfo);
+
+   *winRet = win;
+   *ctxRet = ctx;
+}
+
+
+static void
+event_loop(Display *dpy, Window win)
+{
+   while (1) {
+      while (XPending(dpy) > 0) {
+         XEvent event;
+         XNextEvent(dpy, &event);
+         switch (event.type) {
+	 case Expose:
+            /* we'll redraw below */
+	    break;
+	 case ConfigureNotify:
+	   Reshape(event.xconfigure.width, event.xconfigure.height);
+	    break;
+         case KeyPress:
+            {
+               char buffer[10];
+               int r, code;
+               code = XLookupKeysym(&event.xkey, 0);
+	       r = XLookupString(&event.xkey, buffer, sizeof(buffer),
+				 NULL, NULL);
+	       if (buffer[0] == 27) {
+		 /* escape */
+		 return;
+                 
+               }
+            }
+         }
+      }
+
+   }
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   Display *dpy;
+   Window win;
+   GLXContext ctx;
+   char *dpyName = NULL;
+   GLboolean printInfo = GL_FALSE;
+   int i;
+
+   for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "-display") == 0) {
+         dpyName = argv[i+1];
+         i++;
+      }
+      else if (strcmp(argv[i], "-info") == 0) {
+         printInfo = GL_TRUE;
+      }
+      else
+	 printf("Warrning: unknown parameter: %s\n", argv[i]);
+   }
+
+   dpy = XOpenDisplay(dpyName);
+   if (!dpy) {
+      printf("Error: couldn't open display %s\n",
+	     dpyName ? dpyName : getenv("DISPLAY"));
+      return -1;
+   }
+
+   make_window(dpy, "yuvrect_client", 0, 0, 300, 300, &win, &ctx);
+   XMapWindow(dpy, win);
+   glXMakeCurrent(dpy, win, ctx);
+
+   if (printInfo) {
+      printf("GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
+      printf("GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
+      printf("GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
+      printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
+   }
+
+   Init(argc, argv, dpy, DefaultScreen(dpy), win);
+
+   scr_Display();			       
+   glXSwapBuffers(dpy, win);
+   event_loop(dpy, win);
+
+   glXFreeMemoryMESA(dpy, DefaultScreen(dpy), glx_memory);
+   glXDestroyContext(dpy, ctx);
+   XDestroyWindow(dpy, win);
+   XCloseDisplay(dpy);
+
+   return 0;
+}