Merge branch 'upstream-experimental' into debian-experimental

Conflicts:

	doxygen/Makefile
	doxygen/common.doxy
	doxygen/doxy.bat
	doxygen/glapi.doxy
	doxygen/header.html
	doxygen/main.doxy
	doxygen/math.doxy
	doxygen/shader.doxy
	doxygen/swrast.doxy
	doxygen/swrast_setup.doxy
	doxygen/tnl.doxy
	doxygen/tnl_dd.doxy
	progs/tests/Makefile
	progs/tests/fbotest1.c
	progs/tests/fbotest2.c
	progs/tests/fbotexture.c
	progs/tests/mipmap_limits.c
	progs/tests/sharedtex.c
	progs/tools/trace/gltrace_support.cc
	progs/trivial/Makefile
	src/egl/docs/EGL_MESA_screen_surface
	src/egl/main/egllog.c
	src/glx/mini/Makefile
	src/glx/mini/driver.h
	src/mesa/drivers/allegro/amesa.c
	src/mesa/drivers/windows/gldirect/dx7/gld_driver_dx7.c
	src/mesa/drivers/windows/gldirect/dx7/gld_ext_dx7.c
	src/mesa/drivers/windows/gldirect/dx7/gld_primitive_dx7.c
	src/mesa/drivers/windows/gldirect/dx8/gld_driver_dx8.c
	src/mesa/drivers/windows/gldirect/dx8/gld_ext_dx8.c
	src/mesa/drivers/windows/gldirect/dx8/gld_primitive_dx8.c
	src/mesa/drivers/windows/gldirect/dx9/gld_driver_dx9.c
	src/mesa/drivers/windows/gldirect/dx9/gld_ext_dx9.c
	src/mesa/drivers/windows/gldirect/dx9/gld_primitive_dx9.c
	src/mesa/drivers/windows/gldirect/mesasw/gld_wgl_mesasw.c

40 files changed, 3450 insertions, 253 deletions

diff --git a/progs/demos/.cvsignore b/progs/demos/.gitignore
index f764b3d117e..f764b3d117e 100644
--- a/progs/demos/.cvsignore
+++ b/progs/demos/.gitignore
diff --git a/progs/demos/Makefile b/progs/demos/Makefile
index 4623d6c8d91..cf96828ed7f 100644
--- a/progs/demos/Makefile
+++ b/progs/demos/Makefile
@@ -113,34 +113,46 @@ trackball.o: trackball.c trackball.h
 	$(CC) -c -I$(INCDIR) $(CFLAGS) trackball.c
 
 
+extfuncs.h:  $(TOP)/progs/util/extfuncs.h
+	cp $< .
+
+
 reflect: reflect.o showbuffer.o readtex.o
-	$(CC) -I$(INCDIR) $(CFLAGS) reflect.o showbuffer.o readtex.o $(APP_LIB_DEPS) -o $@
+	$(CC) reflect.o showbuffer.o readtex.o $(APP_LIB_DEPS) -o $@
 
 reflect.o: reflect.c showbuffer.h
 	$(CC) -c -I$(INCDIR) $(CFLAGS) reflect.c
 
 
 shadowtex: shadowtex.o showbuffer.o
-	$(CC) -I$(INCDIR) $(CFLAGS) shadowtex.o showbuffer.o $(APP_LIB_DEPS) -o $@
+	$(CC) shadowtex.o showbuffer.o $(APP_LIB_DEPS) -o $@
 
 shadowtex.o: shadowtex.c showbuffer.h
 	$(CC) -c -I$(INCDIR) $(CFLAGS) shadowtex.c
 
 
 gloss: gloss.o trackball.o readtex.o
-	$(CC) -I$(INCDIR) $(CFLAGS) gloss.o trackball.o readtex.o $(APP_LIB_DEPS) -o $@
+	$(CC) gloss.o trackball.o readtex.o $(APP_LIB_DEPS) -o $@
 
 gloss.o: gloss.c trackball.h
 	$(CC) -c -I$(INCDIR) $(CFLAGS) gloss.c
 
 
 engine: engine.o trackball.o readtex.o
-	$(CC) -I$(INCDIR) $(CFLAGS) engine.o trackball.o readtex.o $(APP_LIB_DEPS) -o $@
+	$(CC) engine.o trackball.o readtex.o $(APP_LIB_DEPS) -o $@
 
 engine.o: engine.c trackball.h
 	$(CC) -c -I$(INCDIR) $(CFLAGS) engine.c
 
 
+fslight: fslight.o
+	$(CC) fslight.o $(APP_LIB_DEPS) -o $@
+
+fslight.o: fslight.c extfuncs.h
+	$(CC) -c -I$(INCDIR) $(CFLAGS) fslight.c
+
+
+
 clean:
 	-rm -f $(PROGS)
 	-rm -f *.o *~
diff --git a/progs/demos/fogcoord.c b/progs/demos/fogcoord.c
index 19a15f05b87..00c73c6f048 100644
--- a/progs/demos/fogcoord.c
+++ b/progs/demos/fogcoord.c
@@ -7,151 +7,136 @@
  * Daniel Borca
  */
 
-
+#define GL_GLEXT_PROTOTYPES
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
 #include <GL/glut.h>
 
-#include "readtex.h"
-
-#define TEXTURE_FILE "../images/bw.rgb"
-
-#define ARRAYS 0     /* use glDrawElements   */
-
-#define VERBOSE 1    /* tell me what happens */
+#define DEPTH 5.0f
 
-#define DEPTH 15.0f
+static PFNGLFOGCOORDFEXTPROC glFogCoordf_ext;
+static PFNGLFOGCOORDPOINTEREXTPROC glFogCoordPointer_ext;
 
-#if !defined(GLAPIENTRYP)
-#    define GLAPIENTRYP *
-#endif
-
-typedef void (GLAPIENTRYP GLFOGCOORDFEXTPROC) (GLfloat f);
-typedef void (GLAPIENTRYP GLFOGCOORDPOINTEREXTPROC) (GLenum, GLsizei, const GLvoid *);
-
-static GLFOGCOORDFEXTPROC glFogCoordf_ext;
-#if ARRAYS
-static GLFOGCOORDPOINTEREXTPROC glFogCoordPointer_ext;
-#endif
 static GLboolean have_fog_coord;
 
 static GLfloat camz;
-static GLuint texture[1];
 
 static GLint fogMode;
 static GLboolean fogCoord;
 static GLfloat fogDensity = 0.75;
-static GLfloat fogStart = 1.0, fogEnd = 40.0;
+static GLfloat fogStart = 1.0, fogEnd = DEPTH;
 static GLfloat fogColor[4] = {0.6f, 0.3f, 0.0f, 1.0f};
+static const char *ModeStr = NULL;
+static GLboolean Arrays = GL_FALSE;
+static GLboolean Texture = GL_TRUE;
 
 
-static void APIENTRY glFogCoordf_nop (GLfloat f)
+static void
+Reset(void)
 {
-   (void)f;
+   fogMode = 1;
+   fogCoord = 1;
+   fogDensity = 0.75;
+   fogStart = 1.0;
+   fogEnd = DEPTH;
+   Arrays = GL_FALSE;
+   Texture = GL_TRUE;
 }
 
 
-static int BuildTexture (const char *filename, GLuint texid[])
+static void APIENTRY
+glFogCoordf_nop (GLfloat f)
 {
-   GLubyte *tex_data;
-   GLenum tex_format;
-   GLint tex_width, tex_height;
+   (void)f;
+}
 
-   tex_data = LoadRGBImage(filename, &tex_width, &tex_height, &tex_format);
-   if (tex_data == NULL) {
-      return -1;
-   }
 
-   {
-      GLint tex_max;
-      glGetIntegerv(GL_MAX_TEXTURE_SIZE, &tex_max);
-      if ((tex_width > tex_max) || (tex_height > tex_max)) {
-         return -1;
-      }
+static void
+PrintString(const char *s)
+{
+   while (*s) {
+      glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int) *s);
+      s++;
    }
+}
 
-   glGenTextures(1, texid);
-   
-   glBindTexture(GL_TEXTURE_2D, texid[0]);
-   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-
-   glTexImage2D(GL_TEXTURE_2D, 0, tex_format, tex_width, tex_height, 0,
-                tex_format, GL_UNSIGNED_BYTE, tex_data);
 
-   return 0;
+static void
+PrintInfo(void)
+{
+   char s[100];
+
+   glDisable(GL_FOG);
+   glColor3f(0, 1, 1);
+
+   sprintf(s, "Mode(m): %s  Start(s/S): %g  End(e/E): %g  Density(d/D): %g",
+           ModeStr, fogStart, fogEnd, fogDensity);
+   glWindowPos2iARB(5, 20);
+   PrintString(s);
+
+   sprintf(s, "Arrays(a): %s  glFogCoord(c): %s  EyeZ(z/z): %g",
+           (Arrays ? "Yes" : "No"),
+           (fogCoord ? "Yes" : "No"),
+           camz);
+   glWindowPos2iARB(5, 5);
+   PrintString(s);
 }
 
 
-static int SetFogMode (GLint fogMode)
+static int
+SetFogMode(GLint fogMode)
 {
    fogMode &= 3;
    switch (fogMode) {
    case 0:
+      ModeStr = "Off";
       glDisable(GL_FOG);
-#if VERBOSE
-      printf("fog(disable)\n");
-#endif
       break;
    case 1:
+      ModeStr = "GL_LINEAR";
       glEnable(GL_FOG);
       glFogi(GL_FOG_MODE, GL_LINEAR);
       glFogf(GL_FOG_START, fogStart);
       glFogf(GL_FOG_END, fogEnd);
-#if VERBOSE
-      printf("fog(GL_LINEAR, %.2f, %.2f)\n", fogStart, fogEnd);
-#endif
       break;
    case 2:
+      ModeStr = "GL_EXP";
       glEnable(GL_FOG);
       glFogi(GL_FOG_MODE, GL_EXP);
       glFogf(GL_FOG_DENSITY, fogDensity);
-#if VERBOSE
-      printf("fog(GL_EXP, %.2f)\n", fogDensity);
-#endif
       break;
    case 3:
+      ModeStr = "GL_EXP2";
       glEnable(GL_FOG);
       glFogi(GL_FOG_MODE, GL_EXP2);
       glFogf(GL_FOG_DENSITY, fogDensity);
-#if VERBOSE
-      printf("fog(GL_EXP2, %.2f)\n", fogDensity);
-#endif
       break;
    }
    return fogMode;
 }
 
 
-static GLboolean SetFogCoord (GLboolean fogCoord)
+static GLboolean
+SetFogCoord(GLboolean fogCoord)
 {
    glFogCoordf_ext = glFogCoordf_nop;
 
    if (!have_fog_coord) {
-#if VERBOSE
-      printf("fog(GL_FRAGMENT_DEPTH_EXT)%s\n", fogCoord ? " EXT_fog_coord not available!" : "");
-#endif
       return GL_FALSE;
    }
 
    if (fogCoord) {
-      glFogCoordf_ext = (GLFOGCOORDFEXTPROC)glutGetProcAddress("glFogCoordfEXT");
+      glFogCoordf_ext = (PFNGLFOGCOORDFEXTPROC)glutGetProcAddress("glFogCoordfEXT");
       glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FOG_COORDINATE_EXT);
-#if VERBOSE
-      printf("fog(GL_FOG_COORDINATE_EXT)\n");
-#endif
-   } else {
+   }
+   else {
       glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FRAGMENT_DEPTH_EXT);
-#if VERBOSE
-      printf("fog(GL_FRAGMENT_DEPTH_EXT)\n");
-#endif
    }
    return fogCoord;
 }
 
 
-#if ARRAYS
 /* could reuse vertices */
 static GLuint vertex_index[] = {
    /* Back */
@@ -172,19 +157,19 @@ static GLuint vertex_index[] = {
 
 static GLfloat vertex_pointer[][3] = {
    /* Back */
-   {-2.5f,-2.5f,-DEPTH}, { 2.5f,-2.5f,-DEPTH}, { 2.5f, 2.5f,-DEPTH}, {-2.5f, 2.5f,-DEPTH},
+   {-1.0f,-1.0f,-DEPTH}, { 1.0f,-1.0f,-DEPTH}, { 1.0f, 1.0f,-DEPTH}, {-1.0f, 1.0f,-DEPTH},
 
    /* Floor */
-   {-2.5f,-2.5f,-DEPTH}, { 2.5f,-2.5f,-DEPTH}, { 2.5f,-2.5f, DEPTH}, {-2.5f,-2.5f, DEPTH},
+   {-1.0f,-1.0f,-DEPTH}, { 1.0f,-1.0f,-DEPTH}, { 1.0f,-1.0f, 0.0}, {-1.0f,-1.0f, 0.0},
 
    /* Roof */
-   {-2.5f, 2.5f,-DEPTH}, { 2.5f, 2.5f,-DEPTH}, { 2.5f, 2.5f, DEPTH}, {-2.5f, 2.5f, DEPTH},
+   {-1.0f, 1.0f,-DEPTH}, { 1.0f, 1.0f,-DEPTH}, { 1.0f, 1.0f, 0.0}, {-1.0f, 1.0f, 0.0},
 
    /* Right */
-   { 2.5f,-2.5f, DEPTH}, { 2.5f, 2.5f, DEPTH}, { 2.5f, 2.5f,-DEPTH}, { 2.5f,-2.5f,-DEPTH},
+   { 1.0f,-1.0f, 0.0}, { 1.0f, 1.0f, 0.0}, { 1.0f, 1.0f,-DEPTH}, { 1.0f,-1.0f,-DEPTH},
 
    /* Left */
-   {-2.5f,-2.5f, DEPTH}, {-2.5f, 2.5f, DEPTH}, {-2.5f, 2.5f,-DEPTH}, {-2.5f,-2.5f,-DEPTH}
+   {-1.0f,-1.0f, 0.0}, {-1.0f, 1.0f, 0.0}, {-1.0f, 1.0f,-DEPTH}, {-1.0f,-1.0f,-DEPTH}
 };
 
 static GLfloat texcoord_pointer[][2] = {
@@ -192,118 +177,139 @@ static GLfloat texcoord_pointer[][2] = {
    {0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, 1.0f}, {0.0f, 1.0f},
 
    /* Floor */
-   {0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, 1.0f}, {0.0f, 1.0f},
+   {0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, DEPTH}, {0.0f, DEPTH},
 
    /* Roof */
-   {0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, 1.0f}, {0.0f, 1.0f},
+   {1.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, DEPTH}, {1.0f, DEPTH},
 
    /* Right */
-   {0.0f, 0.0f}, {0.0f, 1.0f}, {1.0f, 1.0f}, {1.0f, 0.0f},
+   {0.0f, 1.0f}, {0.0f, 0.0f}, {DEPTH, 0.0f}, {DEPTH, 1.0f},
 
    /* Left */
-   {0.0f, 0.0f}, {0.0f, 1.0f}, {1.0f, 1.0f}, {1.0f, 0.0f}
+   {0.0f, 0.0f}, {0.0f, 1.0f}, {DEPTH, 1.0f}, {DEPTH, 0.0f}
 };
 
-static GLfloat fogcoord_pointer[][1] = {
+static GLfloat fogcoord_pointer[] = {
    /* Back */
-   {1.0f}, {1.0f}, {1.0f}, {1.0f},
+   DEPTH, DEPTH, DEPTH, DEPTH,
 
    /* Floor */
-   {1.0f}, {1.0f}, {0.0f}, {0.0f},
+   DEPTH, DEPTH, 0.0, 0.0,
 
    /* Roof */
-   {1.0f}, {1.0f}, {0.0f}, {0.0f},
+   DEPTH, DEPTH, 0.0, 0.0,
 
    /* Right */
-   {0.0f}, {0.0f}, {1.0f}, {1.0f},
+   0.0, 0.0, DEPTH, DEPTH,
 
    /* Left */
-   {0.0f}, {0.0f}, {1.0f}, {1.0f}
+   0.0, 0.0, DEPTH, DEPTH
 };
-#endif
 
 
-static void Display( void )
+static void
+Display( void )
 {
    glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glLoadIdentity ();
    
-   glTranslatef(0.0f, 0.0f, camz);
+   glTranslatef(0.0f, 0.0f, -camz);
 
-#if ARRAYS
-   glDrawElements(GL_QUADS, sizeof(vertex_index) / sizeof(vertex_index[0]), GL_UNSIGNED_INT, vertex_index);
-#else
-   /* Back */
-   glBegin(GL_QUADS);
-   glFogCoordf_ext(1.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-2.5f,-2.5f,-DEPTH);
-   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f( 2.5f,-2.5f,-DEPTH);
-   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 2.5f, 2.5f,-DEPTH);
-   glFogCoordf_ext(1.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-2.5f, 2.5f,-DEPTH);
-   glEnd();
+   SetFogMode(fogMode);
 
-   /* Floor */
-   glBegin(GL_QUADS);
-   glFogCoordf_ext(1.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-2.5f,-2.5f,-DEPTH);
-   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f( 2.5f,-2.5f,-DEPTH);
-   glFogCoordf_ext(0.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 2.5f,-2.5f, DEPTH);
-   glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-2.5f,-2.5f, DEPTH);
-   glEnd();
+   glColor3f(1, 1, 1);
 
-   /* Roof */
-   glBegin(GL_QUADS);
-   glFogCoordf_ext(1.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-2.5f, 2.5f,-DEPTH);
-   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f( 2.5f, 2.5f,-DEPTH);
-   glFogCoordf_ext(0.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 2.5f, 2.5f, DEPTH);
-   glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-2.5f, 2.5f, DEPTH);
-   glEnd();
+   if (Texture)
+      glEnable(GL_TEXTURE_2D);
 
-   /* Right */
-   glBegin(GL_QUADS);
-   glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f( 2.5f,-2.5f, DEPTH);
-   glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f( 2.5f, 2.5f, DEPTH);
-   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 2.5f, 2.5f,-DEPTH);
-   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f( 2.5f,-2.5f,-DEPTH);
-   glEnd();
+   if (Arrays) {
+      glEnableClientState(GL_VERTEX_ARRAY);
+      glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+      glDrawElements(GL_QUADS, sizeof(vertex_index) / sizeof(vertex_index[0]),
+                     GL_UNSIGNED_INT, vertex_index);
+      glDisableClientState(GL_VERTEX_ARRAY);
+      glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+   }
+   else {
+      /* Back */
+      glBegin(GL_QUADS);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f,-1.0f,-DEPTH);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f,-1.0f,-DEPTH);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f,-DEPTH);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f,-DEPTH);
+      glEnd();
+
+      /* Floor */
+      glBegin(GL_QUADS);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f,-1.0f,-DEPTH);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f,-1.0f,-DEPTH);
+      glFogCoordf_ext(0.0f); glTexCoord2f(1.0f,  DEPTH); glVertex3f( 1.0f,-1.0f,0.0);
+      glFogCoordf_ext(0.0f); glTexCoord2f(0.0f,  DEPTH); glVertex3f(-1.0f,-1.0f,0.0);
+      glEnd();
+
+      /* Roof */
+      glBegin(GL_QUADS);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, 1.0f,-DEPTH);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, 1.0f,-DEPTH);
+      glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, DEPTH); glVertex3f( 1.0f, 1.0f,0.0);
+      glFogCoordf_ext(0.0f); glTexCoord2f(1.0f, DEPTH); glVertex3f(-1.0f, 1.0f,0.0);
+      glEnd();
+
+      /* Right */
+      glBegin(GL_QUADS);
+      glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f,-1.0f,0.0);
+      glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, 1.0f,0.0);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(DEPTH, 0.0f); glVertex3f( 1.0f, 1.0f,-DEPTH);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(DEPTH, 1.0f); glVertex3f( 1.0f,-1.0f,-DEPTH);
+      glEnd();
+
+      /* Left */
+      glBegin(GL_QUADS);
+      glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f,-1.0f,0.0);
+      glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f,0.0);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(DEPTH, 1.0f); glVertex3f(-1.0f, 1.0f,-DEPTH);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(DEPTH, 0.0f); glVertex3f(-1.0f,-1.0f,-DEPTH);
+      glEnd();
+   }
 
-   /* Left */
-   glBegin(GL_QUADS);
-   glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-2.5f,-2.5f, DEPTH);
-   glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-2.5f, 2.5f, DEPTH);
-   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f(-2.5f, 2.5f,-DEPTH);
-   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f(-2.5f,-2.5f,-DEPTH);
-   glEnd();
-#endif
+   glDisable(GL_TEXTURE_2D);
+
+   PrintInfo();
 
    glutSwapBuffers();
 }
 
 
-static void Reshape( int width, int height )
+static void
+Reshape( int width, int height )
 {
    glViewport(0, 0, width, height);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
-   gluPerspective(45.0f, (GLfloat)(width)/(GLfloat)(height), 0.1f, 100.0f);
+   glFrustum(-1, 1, -1, 1, 1.0, 100);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
 }
 
 
-static void Key( unsigned char key, int x, int y )
+static void
+Key( unsigned char key, int x, int y )
 {
    (void) x;
    (void) y;
    switch (key) {
+      case 'a':
+         Arrays = !Arrays;
+         break;
       case 'f':
+      case 'm':
          fogMode = SetFogMode(fogMode + 1);
          break;
-      case '+':
-         if (fogDensity < 1.0) {
-            fogDensity += 0.05;
-         }
+      case 'D':
+         fogDensity += 0.05;
          SetFogMode(fogMode);
          break;
-      case '-':
+      case 'd':
          if (fogDensity > 0.0) {
             fogDensity -= 0.05;
          }
@@ -311,31 +317,43 @@ static void Key( unsigned char key, int x, int y )
          break;
       case 's':
          if (fogStart > 0.0) {
-            fogStart -= 1.0;
+            fogStart -= 0.25;
          }
          SetFogMode(fogMode);
          break;
       case 'S':
-         if (fogStart < fogEnd) {
-            fogStart += 1.0;
+         if (fogStart < 100.0) {
+            fogStart += 0.25;
          }
          SetFogMode(fogMode);
          break;
       case 'e':
-         if (fogEnd > fogStart) {
-            fogEnd -= 1.0;
+         if (fogEnd > 0.0) {
+            fogEnd -= 0.25;
          }
          SetFogMode(fogMode);
          break;
       case 'E':
          if (fogEnd < 100.0) {
-            fogEnd += 1.0;
+            fogEnd += 0.25;
          }
          SetFogMode(fogMode);
          break;
       case 'c':
          fogCoord = SetFogCoord(fogCoord ^ GL_TRUE);
          break;
+      case 't':
+         Texture = !Texture;
+         break;
+      case 'z':
+         camz -= 0.1;
+         break;
+      case 'Z':
+         camz += 0.1;
+         break;
+      case 'r':
+         Reset();
+         break;
       case 27:
          exit(0);
          break;
@@ -344,37 +362,28 @@ static void Key( unsigned char key, int x, int y )
 }
 
 
-static void SpecialKey( int key, int x, int y )
+static void
+Init(void)
 {
-   (void) x;
-   (void) y;
-   switch (key) {
-      case GLUT_KEY_UP:
-         if (camz < (DEPTH - 1.0)) {
-            camz += 1.0f;
-         }
-         break;
-      case GLUT_KEY_DOWN:
-         if (camz > -19.0) {
-            camz -= 1.0f;
-         }
-         break;
-   }
-   glutPostRedisplay();
-}
+   static const GLubyte teximage[2][2][4] = {
+      { { 255, 255, 255, 255}, { 128, 128, 128, 255} },
+      { { 128, 128, 128, 255}, { 255, 255, 255, 255} }
+   };
 
+   printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
 
-static void Init( void )
-{
    have_fog_coord = glutExtensionSupported("GL_EXT_fog_coord");
-
-   if (BuildTexture(TEXTURE_FILE, texture) == -1) {
-      exit(1);
+   if (!have_fog_coord) {
+      printf("GL_EXT_fog_coord not supported!\n");
    }
 
-   glEnable(GL_TEXTURE_2D);
-   glClearColor(0.0f, 0.0f, 0.0f, 0.5f);
-   glClearDepth(1.0f);
+   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 2, 2, 0,
+                GL_RGBA, GL_UNSIGNED_BYTE, teximage);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+   glClearColor(0.1f, 0.1f, 0.1f, 0.0f);
+
    glDepthFunc(GL_LEQUAL);
    glEnable(GL_DEPTH_TEST);
    glShadeModel(GL_SMOOTH);
@@ -383,11 +392,8 @@ static void Init( void )
    glFogfv(GL_FOG_COLOR, fogColor);
    glHint(GL_FOG_HINT, GL_NICEST);
    fogCoord = SetFogCoord(GL_TRUE); /* try to enable fog_coord */
-   fogMode = SetFogMode(2);         /* GL_EXP */
-
-   camz = -19.0f;
+   fogMode = SetFogMode(1);
 
-#if ARRAYS
    glEnableClientState(GL_VERTEX_ARRAY);
    glVertexPointer(3, GL_FLOAT, 0, vertex_pointer);
 
@@ -395,24 +401,24 @@ static void Init( void )
    glTexCoordPointer(2, GL_FLOAT, 0, texcoord_pointer);
 
    if (have_fog_coord) {
-      glFogCoordPointer_ext = (GLFOGCOORDPOINTEREXTPROC)glutGetProcAddress("glFogCoordPointerEXT");
+      glFogCoordPointer_ext = (PFNGLFOGCOORDPOINTEREXTPROC)glutGetProcAddress("glFogCoordPointerEXT");
       glEnableClientState(GL_FOG_COORDINATE_ARRAY_EXT);
       glFogCoordPointer_ext(GL_FLOAT, 0, fogcoord_pointer);
    }
-#endif
+
+   Reset();
 }
 
 
-int main( int argc, char *argv[] )
+int
+main( int argc, char *argv[] )
 {
    glutInit( &argc, argv );
-   glutInitWindowPosition( 0, 0 );
-   glutInitWindowSize( 640, 480 );
+   glutInitWindowSize( 600, 600 );
    glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
    glutCreateWindow(argv[0]);
    glutReshapeFunc( Reshape );
    glutKeyboardFunc( Key );
-   glutSpecialFunc( SpecialKey );
    glutDisplayFunc( Display );
    Init();
    glutMainLoop();
diff --git a/progs/demos/fslight.c b/progs/demos/fslight.c
index 1c016cc75e9..493ce0e90f1 100644
--- a/progs/demos/fslight.c
+++ b/progs/demos/fslight.c
@@ -20,20 +20,30 @@
 #include <GL/gl.h>
 #include <GL/glut.h>
 #include <GL/glext.h>
+#include "extfuncs.h"
+
+
+#define TEXTURE 0
+
+static GLint CoordAttrib = 0;
+
+static char *FragProgFile = NULL;
+static char *VertProgFile = NULL;
 
 static GLfloat diffuse[4] = { 0.5f, 0.5f, 1.0f, 1.0f };
 static GLfloat specular[4] = { 0.8f, 0.8f, 0.8f, 1.0f };
-static GLfloat lightPos[4] = { 0.0f, 10.0f, 20.0f, 1.0f };
+static GLfloat lightPos[4] = { 0.0f, 10.0f, 20.0f, 0.0f };
 static GLfloat delta = 1.0f;
 
 static GLuint fragShader;
 static GLuint vertShader;
 static GLuint program;
 
-static GLint uLightPos;
 static GLint uDiffuse;
 static GLint uSpecular;
+static GLint uTexture;
 
+static GLuint SphereList, RectList, CurList;
 static GLint win = 0;
 static GLboolean anim = GL_TRUE;
 static GLboolean wire = GL_FALSE;
@@ -42,24 +52,7 @@ static GLboolean pixelLight = GL_TRUE;
 static GLint t0 = 0;
 static GLint frames = 0;
 
-static GLfloat xRot = 0.0f, yRot = 0.0f;
-
-static PFNGLCREATESHADERPROC glCreateShader_func = NULL;
-static PFNGLSHADERSOURCEPROC glShaderSource_func = NULL;
-static PFNGLGETSHADERSOURCEPROC glGetShaderSource_func = NULL;
-static PFNGLCOMPILESHADERPROC glCompileShader_func = NULL;
-static PFNGLCREATEPROGRAMPROC glCreateProgram_func = NULL;
-static PFNGLDELETEPROGRAMPROC glDeleteProgram_func = NULL;
-static PFNGLDELETESHADERPROC glDeleteShader_func = NULL;
-static PFNGLATTACHSHADERPROC glAttachShader_func = NULL;
-static PFNGLLINKPROGRAMPROC glLinkProgram_func = NULL;
-static PFNGLUSEPROGRAMPROC glUseProgram_func = NULL;
-static PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation_func = NULL;
-static PFNGLISPROGRAMPROC glIsProgram_func = NULL;
-static PFNGLISSHADERPROC glIsShader_func = NULL;
-static PFNGLUNIFORM3FVPROC glUniform3fv_func = NULL;
-static PFNGLUNIFORM3FVPROC glUniform4fv_func = NULL;
-
+static GLfloat xRot = 90.0f, yRot = 0.0f;
 
 
 static void
@@ -69,31 +62,37 @@ normalize(GLfloat *dst, const GLfloat *src)
    dst[0] = src[0] / len;
    dst[1] = src[1] / len;
    dst[2] = src[2] / len;
+   dst[3] = src[3];
 }
 
 
 static void
 Redisplay(void)
 {
+   GLfloat vec[4];
+
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   /* update light position */
+   normalize(vec, lightPos);
+   glLightfv(GL_LIGHT0, GL_POSITION, vec);
    
    if (pixelLight) {
-      GLfloat vec[3];
       glUseProgram_func(program);
-      normalize(vec, lightPos);
-      glUniform3fv_func(uLightPos, 1, vec);
       glDisable(GL_LIGHTING);
    }
    else {
       glUseProgram_func(0);
-      glLightfv(GL_LIGHT0, GL_POSITION, lightPos);
       glEnable(GL_LIGHTING);
    }
 
    glPushMatrix();
    glRotatef(xRot, 1.0f, 0.0f, 0.0f);
    glRotatef(yRot, 0.0f, 1.0f, 0.0f);
+   /*
    glutSolidSphere(2.0, 10, 5);
+   */
+   glCallList(CurList);
    glPopMatrix();
 
    glutSwapBuffers();
@@ -174,6 +173,12 @@ Key(unsigned char key, int x, int y)
       else
          glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
       break;
+   case 'o':
+      if (CurList == SphereList)
+         CurList = RectList;
+      else
+         CurList = SphereList;
+      break;
    case 'p':
       pixelLight = !pixelLight;
       if (pixelLight)
@@ -217,16 +222,248 @@ SpecialKey(int key, int x, int y)
 
 
 static void
+TestFunctions(void)
+{
+   printf("Error 0x%x at line %d\n", glGetError(), __LINE__);
+   {
+      GLfloat pos[3];
+      printf("Error 0x%x at line %d\n", glGetError(), __LINE__);
+      printf("Light pos %g %g %g\n", pos[0], pos[1], pos[2]);
+   }
+
+
+   {
+      GLfloat m[16], result[16];
+      GLint mPos;
+      int i;
+
+      for (i = 0; i < 16; i++)
+         m[i] = (float) i;
+
+      mPos = glGetUniformLocation_func(program, "m");
+      printf("Error 0x%x at line %d\n", glGetError(), __LINE__);
+      glUniformMatrix4fv_func(mPos, 1, GL_FALSE, m);
+      printf("Error 0x%x at line %d\n", glGetError(), __LINE__);
+
+      glGetUniformfv_func(program, mPos, result);
+      printf("Error 0x%x at line %d\n", glGetError(), __LINE__);
+
+      for (i = 0; i < 16; i++) {
+         printf("%8g %8g\n", m[i], result[i]);
+      }
+   }
+
+   assert(glIsProgram_func(program));
+   assert(glIsShader_func(fragShader));
+   assert(glIsShader_func(vertShader));
+
+   /* attached shaders */
+   {
+      GLuint shaders[20];
+      GLsizei count;
+      int i;
+      glGetAttachedShaders_func(program, 20, &count, shaders);
+      for (i = 0; i < count; i++) {
+         printf("Attached: %u\n", shaders[i]);
+         assert(shaders[i] == fragShader ||
+                shaders[i] == vertShader);
+      }
+   }
+
+   {
+      GLchar log[1000];
+      GLsizei len;
+      glGetShaderInfoLog_func(vertShader, 1000, &len, log);
+      printf("Vert Shader Info Log: %s\n", log);
+      glGetShaderInfoLog_func(fragShader, 1000, &len, log);
+      printf("Frag Shader Info Log: %s\n", log);
+      glGetProgramInfoLog_func(program, 1000, &len, log);
+      printf("Program Info Log: %s\n", log);
+   }
+}
+
+
+#if TEXTURE
+static void
+MakeTexture(void)
+{
+#define SZ0 64
+#define SZ1 32
+   GLubyte image0[SZ0][SZ0][SZ0][4];
+   GLubyte image1[SZ1][SZ1][SZ1][4];
+   GLuint i, j, k;
+
+   /* level 0: two-tone gray checkboard */
+   for (i = 0; i < SZ0; i++) {
+      for (j = 0; j < SZ0; j++) {
+         for (k = 0; k < SZ0; k++) {
+            if ((i/8 + j/8 + k/8) & 1) {
+               image0[i][j][k][0] = 
+               image0[i][j][k][1] = 
+               image0[i][j][k][2] = 200;
+            }
+            else {
+               image0[i][j][k][0] = 
+               image0[i][j][k][1] = 
+               image0[i][j][k][2] = 100;
+            }
+            image0[i][j][k][3] = 255;
+         }
+      }
+   }
+
+   /* level 1: two-tone green checkboard */
+   for (i = 0; i < SZ1; i++) {
+      for (j = 0; j < SZ1; j++) {
+         for (k = 0; k < SZ1; k++) {
+            if ((i/8 + j/8 + k/8) & 1) {
+               image1[i][j][k][0] = 0;
+               image1[i][j][k][1] = 250;
+               image1[i][j][k][2] = 0;
+            }
+            else {
+               image1[i][j][k][0] = 0;
+               image1[i][j][k][1] = 200;
+               image1[i][j][k][2] = 0;
+            }
+            image1[i][j][k][3] = 255;
+         }
+      }
+   }
+
+   glActiveTexture(GL_TEXTURE2); /* unit 2 */
+   glBindTexture(GL_TEXTURE_2D, 42);
+   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, SZ0, SZ0, 0,
+                GL_RGBA, GL_UNSIGNED_BYTE, image0);
+   glTexImage2D(GL_TEXTURE_2D, 1, GL_RGBA, SZ1, SZ1, 0,
+                GL_RGBA, GL_UNSIGNED_BYTE, image1);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 1);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+   glActiveTexture(GL_TEXTURE4); /* unit 4 */
+   glBindTexture(GL_TEXTURE_3D, 43);
+   glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA, SZ0, SZ0, SZ0, 0,
+                GL_RGBA, GL_UNSIGNED_BYTE, image0);
+   glTexImage3D(GL_TEXTURE_3D, 1, GL_RGBA, SZ1, SZ1, SZ1, 0,
+                GL_RGBA, GL_UNSIGNED_BYTE, image1);
+   glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAX_LEVEL, 1);
+   glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+   glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+}
+#endif
+
+
+static void
+MakeSphere(void)
+{
+   GLUquadricObj *obj = gluNewQuadric();
+   SphereList = glGenLists(1);
+   gluQuadricTexture(obj, GL_TRUE);
+   glNewList(SphereList, GL_COMPILE);
+   gluSphere(obj, 2.0f, 10, 5);
+   glEndList();
+}
+
+static void
+VertAttrib(GLint index, float x, float y)
+{
+#if 1
+   glVertexAttrib2f_func(index, x, y);
+#else
+   glTexCoord2f(x, y);
+#endif
+}
+
+static void
+MakeRect(void)
+{
+   RectList = glGenLists(1);
+   glNewList(RectList, GL_COMPILE);
+   glNormal3f(0, 0, 1);
+   glBegin(GL_POLYGON);
+   VertAttrib(CoordAttrib, 0, 0);   glVertex2f(-2, -2);
+   VertAttrib(CoordAttrib, 1, 0);   glVertex2f( 2, -2);
+   VertAttrib(CoordAttrib, 1, 1);   glVertex2f( 2,  2);
+   VertAttrib(CoordAttrib, 0, 1);   glVertex2f(-2,  2);
+   glEnd();    /* XXX omit this and crash! */
+   glEndList();
+}
+
+
+
+static void
+LoadAndCompileShader(GLuint shader, const char *text)
+{
+   GLint stat;
+
+   glShaderSource_func(shader, 1, (const GLchar **) &text, NULL);
+
+   glCompileShader_func(shader);
+
+   glGetShaderiv_func(shader, GL_COMPILE_STATUS, &stat);
+   if (!stat) {
+      GLchar log[1000];
+      GLsizei len;
+      glGetShaderInfoLog_func(shader, 1000, &len, log);
+      fprintf(stderr, "fslight: problem compiling shader:\n%s\n", log);
+      exit(1);
+   }
+}
+
+
+/**
+ * Read a shader from a file.
+ */
+static void
+ReadShader(GLuint shader, const char *filename)
+{
+   const int max = 100*1000;
+   int n;
+   char *buffer = (char*) malloc(max);
+   FILE *f = fopen(filename, "r");
+   if (!f) {
+      fprintf(stderr, "fslight: Unable to open shader file %s\n", filename);
+      exit(1);
+   }
+
+   n = fread(buffer, 1, max, f);
+   printf("fslight: read %d bytes from shader file %s\n", n, filename);
+   if (n > 0) {
+      buffer[n] = 0;
+      LoadAndCompileShader(shader, buffer);
+   }
+
+   fclose(f);
+   free(buffer);
+}
+
+
+static void
+CheckLink(GLuint prog)
+{
+   GLint stat;
+   glGetProgramiv_func(prog, GL_LINK_STATUS, &stat);
+   if (!stat) {
+      GLchar log[1000];
+      GLsizei len;
+      glGetProgramInfoLog_func(prog, 1000, &len, log);
+      fprintf(stderr, "Linker error:\n%s\n", log);
+   }
+}
+
+
+static void
 Init(void)
 {
    static const char *fragShaderText =
-      "uniform vec3 lightPos;\n"
       "uniform vec4 diffuse;\n"
       "uniform vec4 specular;\n"
       "varying vec3 normal;\n"
       "void main() {\n"
       "   // Compute dot product of light direction and normal vector\n"
-      "   float dotProd = max(dot(lightPos, normalize(normal)), 0.0);\n"
+      "   float dotProd = max(dot(gl_LightSource[0].position.xyz, \n"
+      "                           normalize(normal)), 0.0);\n"
       "   // Compute diffuse and specular contributions\n"
       "   gl_FragColor = diffuse * dotProd + specular * pow(dotProd, 20.0);\n"
       "}\n";
@@ -236,53 +473,63 @@ Init(void)
       "   gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
       "   normal = gl_NormalMatrix * gl_Normal;\n"
       "}\n";
-
-
    const char *version;
 
    version = (const char *) glGetString(GL_VERSION);
    if (version[0] != '2' || version[1] != '.') {
-      printf("Warning: this program expects OpenGL 2.0\n");
-      /*exit(1);*/
+      printf("This program requires OpenGL 2.x, found %s\n", version);
+      exit(1);
    }
 
-
-   glCreateShader_func = (PFNGLCREATESHADERPROC) glutGetProcAddress("glCreateShader");
-   glDeleteShader_func = (PFNGLDELETESHADERPROC) glutGetProcAddress("glDeleteShader");
-   glDeleteProgram_func = (PFNGLDELETEPROGRAMPROC) glutGetProcAddress("glDeleteProgram");
-   glShaderSource_func = (PFNGLSHADERSOURCEPROC) glutGetProcAddress("glShaderSource");
-   glGetShaderSource_func = (PFNGLGETSHADERSOURCEPROC) glutGetProcAddress("glGetShaderSource");
-   glCompileShader_func = (PFNGLCOMPILESHADERPROC) glutGetProcAddress("glCompileShader");
-   glCreateProgram_func = (PFNGLCREATEPROGRAMPROC) glutGetProcAddress("glCreateProgram");
-   glAttachShader_func = (PFNGLATTACHSHADERPROC) glutGetProcAddress("glAttachShader");
-   glLinkProgram_func = (PFNGLLINKPROGRAMPROC) glutGetProcAddress("glLinkProgram");
-   glUseProgram_func = (PFNGLUSEPROGRAMPROC) glutGetProcAddress("glUseProgram");
-   glGetUniformLocation_func = (PFNGLGETUNIFORMLOCATIONPROC) glutGetProcAddress("glGetUniformLocation");
-   glIsProgram_func = (PFNGLISPROGRAMPROC) glutGetProcAddress("glIsProgram");
-   glIsShader_func = (PFNGLISSHADERPROC) glutGetProcAddress("glIsShader");
-   glUniform3fv_func = (PFNGLUNIFORM3FVPROC) glutGetProcAddress("glUniform3fv");
-   glUniform4fv_func = (PFNGLUNIFORM3FVPROC) glutGetProcAddress("glUniform4fv");
+   GetExtensionFuncs();
 
    fragShader = glCreateShader_func(GL_FRAGMENT_SHADER);
-   glShaderSource_func(fragShader, 1, &fragShaderText, NULL);
-   glCompileShader_func(fragShader);
+   if (FragProgFile)
+      ReadShader(fragShader, FragProgFile);
+   else
+      LoadAndCompileShader(fragShader, fragShaderText);
+
 
    vertShader = glCreateShader_func(GL_VERTEX_SHADER);
-   glShaderSource_func(vertShader, 1, &vertShaderText, NULL);
-   glCompileShader_func(vertShader);
+   if (VertProgFile)
+      ReadShader(vertShader, VertProgFile);
+   else
+      LoadAndCompileShader(vertShader, vertShaderText);
 
    program = glCreateProgram_func();
    glAttachShader_func(program, fragShader);
    glAttachShader_func(program, vertShader);
    glLinkProgram_func(program);
+   CheckLink(program);
    glUseProgram_func(program);
 
-   uLightPos = glGetUniformLocation_func(program, "lightPos");
    uDiffuse = glGetUniformLocation_func(program, "diffuse");
    uSpecular = glGetUniformLocation_func(program, "specular");
+   uTexture = glGetUniformLocation_func(program, "texture");
+   printf("DiffusePos %d  SpecularPos %d  TexturePos %d\n",
+          uDiffuse, uSpecular, uTexture);
 
    glUniform4fv_func(uDiffuse, 1, diffuse);
    glUniform4fv_func(uSpecular, 1, specular);
+   /*   assert(glGetError() == 0);*/
+   glUniform1i_func(uTexture, 2);  /* use texture unit 2 */
+   /*assert(glGetError() == 0);*/
+
+   if (CoordAttrib) {
+      int i;
+      glBindAttribLocation_func(program, CoordAttrib, "coord");
+      i = glGetAttribLocation_func(program, "coord");
+      assert(i >= 0);
+      if (i != CoordAttrib) {
+         printf("Hmmm, NVIDIA bug?\n");
+         CoordAttrib = i;
+      }
+      else {
+         printf("Mesa bind attrib: coord = %d\n", i);
+      }
+   }
+
+   /*assert(glGetError() == 0);*/
 
    glClearColor(0.3f, 0.3f, 0.3f, 0.0f);
    glEnable(GL_DEPTH_TEST);
@@ -292,11 +539,20 @@ Init(void)
    glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, specular);
    glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 20.0f);
 
+   MakeSphere();
+   MakeRect();
+
+   CurList = SphereList;
+
+#if TEXTURE
+   MakeTexture();
+#endif
+
    printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
    printf("Press p to toggle between per-pixel and per-vertex lighting\n");
 
    /* test glGetShaderSource() */
-   {
+   if (0) {
       GLsizei len = strlen(fragShaderText) + 1;
       GLsizei lenOut;
       GLchar *src =(GLchar *) malloc(len * sizeof(GLchar));
@@ -310,6 +566,37 @@ Init(void)
    assert(glIsProgram_func(program));
    assert(glIsShader_func(fragShader));
    assert(glIsShader_func(vertShader));
+
+   glColor3f(1, 0, 0);
+
+   /* for testing state vars */
+   {
+      static GLfloat fc[4] = { 1, 1, 0, 0 };
+      static GLfloat amb[4] = { 1, 0, 1, 0 };
+      glFogfv(GL_FOG_COLOR, fc);
+      glLightfv(GL_LIGHT1, GL_AMBIENT, amb);
+   }
+
+#if 0
+   TestFunctions();
+#else
+   (void) TestFunctions;
+#endif
+}
+
+
+static void
+ParseOptions(int argc, char *argv[])
+{
+   int i;
+   for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "-fs") == 0) {
+         FragProgFile = argv[i+1];
+      }
+      else if (strcmp(argv[i], "-vs") == 0) {
+         VertProgFile = argv[i+1];
+      }
+   }
 }
 
 
@@ -327,8 +614,10 @@ main(int argc, char *argv[])
    glutDisplayFunc(Redisplay);
    if (anim)
       glutIdleFunc(Idle);
+   ParseOptions(argc, argv);
    Init();
    glutMainLoop();
    return 0;
 }
 
+
diff --git a/progs/demos/texdown.c b/progs/demos/texdown.c
index fc98fddb310..5fecd9a1489 100644
--- a/progs/demos/texdown.c
+++ b/progs/demos/texdown.c
@@ -149,7 +149,7 @@ TypeStr(GLenum type)
  */
 #define ALIGN (1<<12)
 
-static unsigned align(unsigned value, unsigned a)
+static unsigned long align(unsigned long value, unsigned long a)
 {
    return (value + a - 1) & ~(a-1);
 }
@@ -186,10 +186,10 @@ MeasureDownloadRate(void)
 
    printf("alloc %p %p\n", orig_texImage, orig_getImage);
 
-   texImage = (GLubyte *)align((unsigned)orig_texImage, ALIGN);
-   getImage = (GLubyte *)align((unsigned)orig_getImage, ALIGN);   
+   texImage = (GLubyte *)align((unsigned long)orig_texImage, ALIGN);
+   getImage = (GLubyte *)align((unsigned long)orig_getImage, ALIGN);   
 
-   for (i = 1; !(((unsigned)texImage) & i); i<<=1)
+   for (i = 1; !(((unsigned long)texImage) & i); i<<=1)
       ;
    printf("texture image alignment: %d bytes (%p)\n", i, texImage);
       
diff --git a/progs/demos/winpos.c b/progs/demos/winpos.c
index 2ee1df69fbc..3a1a19ecdb9 100644
--- a/progs/demos/winpos.c
+++ b/progs/demos/winpos.c
@@ -77,7 +77,7 @@ static void init( void )
       WindowPosFunc = &glWindowPos2fARB;
    }
    else
-#elif defined(GL_ARB_window_pos)
+#elif defined(GL_MESA_window_pos)
    if (glutExtensionSupported("GL_MESA_window_pos")) {
       printf("Using GL_MESA_window_pos\n");
       WindowPosFunc = &glWindowPos2fMESA;
diff --git a/progs/glsl/CH06-brick.frag.txt b/progs/glsl/CH06-brick.frag.txt
new file mode 100644
index 00000000000..06ef04e3afb
--- /dev/null
+++ b/progs/glsl/CH06-brick.frag.txt
@@ -0,0 +1,36 @@
+//
+// Fragment shader for procedural bricks
+//
+// Authors: Dave Baldwin, Steve Koren, Randi Rost
+//          based on a shader by Darwyn Peachey
+//
+// Copyright (c) 2002-2006 3Dlabs Inc. Ltd. 
+//
+// See 3Dlabs-License.txt for license information
+//
+
+uniform vec3  BrickColor, MortarColor;
+uniform vec2  BrickSize;
+uniform vec2  BrickPct;
+
+varying vec2  MCposition;
+varying float LightIntensity;
+
+void main()
+{
+    vec3  color;
+    vec2  position, useBrick;
+    
+    position = MCposition / BrickSize;
+
+    if (fract(position.y * 0.5) > 0.5)
+        position.x += 0.5;
+
+    position = fract(position);
+
+    useBrick = step(position, BrickPct);
+
+    color  = mix(MortarColor, BrickColor, useBrick.x * useBrick.y);
+    color *= LightIntensity;
+    gl_FragColor = vec4(color, 1.0);
+}
diff --git a/progs/glsl/CH06-brick.vert.txt b/progs/glsl/CH06-brick.vert.txt
new file mode 100644
index 00000000000..e95e6f42f0b
--- /dev/null
+++ b/progs/glsl/CH06-brick.vert.txt
@@ -0,0 +1,41 @@
+//
+// Vertex shader for procedural bricks
+//
+// Authors: Dave Baldwin, Steve Koren, Randi Rost
+//          based on a shader by Darwyn Peachey
+//
+// Copyright (c) 2002-2006 3Dlabs Inc. Ltd. 
+//
+// See 3Dlabs-License.txt for license information
+//
+
+uniform vec3 LightPosition;
+
+const float SpecularContribution = 0.3;
+const float DiffuseContribution  = 1.0 - SpecularContribution;
+
+varying float LightIntensity;
+varying vec2  MCposition;
+
+void main()
+{
+    vec3 ecPosition = vec3(gl_ModelViewMatrix * gl_Vertex);
+    vec3 tnorm      = normalize(gl_NormalMatrix * gl_Normal);
+    vec3 lightVec   = normalize(LightPosition - ecPosition);
+    vec3 reflectVec = reflect(-lightVec, tnorm);
+    vec3 viewVec    = normalize(-ecPosition);
+    float diffuse   = max(dot(lightVec, tnorm), 0.0);
+    float spec      = 0.0;
+
+    if (diffuse > 0.0)
+    {
+        spec = max(dot(reflectVec, viewVec), 0.0);
+        spec = pow(spec, 16.0);
+    }
+
+    LightIntensity  = DiffuseContribution * diffuse +
+                      SpecularContribution * spec;
+
+    MCposition      = gl_Vertex.xy;
+    gl_Position     = ftransform();
+}
diff --git a/progs/glsl/CH11-bumpmap.frag.txt b/progs/glsl/CH11-bumpmap.frag.txt
new file mode 100644
index 00000000000..063576f5a3c
--- /dev/null
+++ b/progs/glsl/CH11-bumpmap.frag.txt
@@ -0,0 +1,41 @@
+//
+// Fragment shader for procedural bumps
+//
+// Authors: John Kessenich, Randi Rost
+//
+// Copyright (c) 2002-2006 3Dlabs Inc. Ltd. 
+//
+// See 3Dlabs-License.txt for license information
+//
+
+varying vec3 LightDir;
+varying vec3 EyeDir;
+
+uniform vec3  SurfaceColor;    // = (0.7, 0.6, 0.18)
+uniform float BumpDensity;     // = 16.0
+uniform float BumpSize;        // = 0.15
+uniform float SpecularFactor;  // = 0.5
+
+void main()
+{
+    vec3 litColor;
+    vec2 c = BumpDensity * gl_TexCoord[0].st;
+    vec2 p = fract(c) - vec2(0.5);
+
+    float d, f;
+    d = p.x * p.x + p.y * p.y;
+    f = 1.0 / sqrt(d + 1.0);
+
+    if (d >= BumpSize)
+        { p = vec2(0.0); f = 1.0; }
+
+    vec3 normDelta = vec3(p.x, p.y, 1.0) * f;
+    litColor = SurfaceColor * max(dot(normDelta, LightDir), 0.0);
+    vec3 reflectDir = reflect(LightDir, normDelta);
+    
+    float spec = max(dot(EyeDir, reflectDir), 0.0);
+    spec *= SpecularFactor;
+    litColor = min(litColor + spec, vec3(1.0));
+
+    gl_FragColor = vec4(litColor, 1.0);
+}
diff --git a/progs/glsl/CH11-bumpmap.vert.txt b/progs/glsl/CH11-bumpmap.vert.txt
new file mode 100644
index 00000000000..d3d19f62ac3
--- /dev/null
+++ b/progs/glsl/CH11-bumpmap.vert.txt
@@ -0,0 +1,38 @@
+//
+// Vertex shader for procedural bumps
+//
+// Authors: Randi Rost, John Kessenich
+//
+// Copyright (c) 2002-2006 3Dlabs Inc. Ltd. 
+//
+// See 3Dlabs-License.txt for license information
+//
+
+varying vec3 LightDir;
+varying vec3 EyeDir;
+
+uniform vec3 LightPosition;
+
+attribute vec3 Tangent;
+
+void main() 
+{
+    EyeDir         = vec3(gl_ModelViewMatrix * gl_Vertex);
+    gl_Position    = ftransform();
+    gl_TexCoord[0] = gl_MultiTexCoord0;
+
+    vec3 n = normalize(gl_NormalMatrix * gl_Normal);
+    vec3 t = normalize(gl_NormalMatrix * Tangent);
+    vec3 b = cross(n, t);
+
+    vec3 v;
+    v.x = dot(LightPosition, t);
+    v.y = dot(LightPosition, b);
+    v.z = dot(LightPosition, n);
+    LightDir = normalize(v);
+
+    v.x = dot(EyeDir, t);
+    v.y = dot(EyeDir, b);
+    v.z = dot(EyeDir, n);
+    EyeDir = normalize(v);
+}
diff --git a/progs/glsl/CH11-toyball.frag.txt b/progs/glsl/CH11-toyball.frag.txt
new file mode 100644
index 00000000000..90ec1c27fc1
--- /dev/null
+++ b/progs/glsl/CH11-toyball.frag.txt
@@ -0,0 +1,75 @@
+//
+// Fragment shader for procedurally generated toy ball
+//
+// Author: Bill Licea-Kane
+//
+// Copyright (c) 2002-2003 ATI Research 
+//
+// See ATI-License.txt for license information
+//
+
+varying vec4 ECposition;   // surface position in eye coordinates
+varying vec4 ECballCenter; // ball center in eye coordinates
+
+uniform vec4  LightDir;     // light direction, should be normalized
+uniform vec4  HVector;      // reflection vector for infinite light source
+uniform vec4  SpecularColor;
+uniform vec4  Red, Yellow, Blue;
+
+uniform vec4  HalfSpace0;   // half-spaces used to define star pattern
+uniform vec4  HalfSpace1;
+uniform vec4  HalfSpace2;
+uniform vec4  HalfSpace3;
+uniform vec4  HalfSpace4;
+
+uniform float InOrOutInit;  // = -3
+uniform float StripeWidth;  // = 0.3
+uniform float FWidth;       // = 0.005
+
+void main()
+{
+    vec4  normal;              // Analytically computed normal
+    vec4  p;                   // Point in shader space
+    vec4  surfColor;           // Computed color of the surface
+    float intensity;           // Computed light intensity
+    vec4  distance;            // Computed distance values
+    float inorout;             // Counter for computing star pattern
+
+    p.xyz = normalize(ECposition.xyz - ECballCenter.xyz);    // Calculate p
+    p.w   = 1.0;
+
+    inorout = InOrOutInit;     // initialize inorout to -3
+
+    distance[0] = dot(p, HalfSpace0);
+    distance[1] = dot(p, HalfSpace1);
+    distance[2] = dot(p, HalfSpace2);
+    distance[3] = dot(p, HalfSpace3);
+
+    distance = smoothstep(-FWidth, FWidth, distance);
+    inorout += dot(distance, vec4(1.0));
+
+    distance.x = dot(p, HalfSpace4);
+    distance.y = StripeWidth - abs(p.z);
+    distance = smoothstep(-FWidth, FWidth, distance);
+    inorout += distance.x;
+
+    inorout = clamp(inorout, 0.0, 1.0);
+
+    surfColor = mix(Yellow, Red, inorout);
+    surfColor = mix(surfColor, Blue, distance.y);
+
+    // normal = point on surface for sphere at (0,0,0)
+    normal = p;
+
+    // Per fragment diffuse lighting
+    intensity  = 0.2; // ambient
+    intensity += 0.8 * clamp(dot(LightDir, normal), 0.0, 1.0);
+    surfColor *= intensity;
+
+    // Per fragment specular lighting
+    intensity  = clamp(dot(HVector, normal), 0.0, 1.0);
+    intensity  = pow(intensity, SpecularColor.a);
+    surfColor += SpecularColor * intensity;
+
+    gl_FragColor = surfColor;
+}
diff --git a/progs/glsl/CH11-toyball.vert.txt b/progs/glsl/CH11-toyball.vert.txt
new file mode 100644
index 00000000000..b7da3ac839e
--- /dev/null
+++ b/progs/glsl/CH11-toyball.vert.txt
@@ -0,0 +1,24 @@
+//
+// Fragment shader for procedurally generated toy ball
+//
+// Author: Bill Licea-Kane
+//
+// Copyright (c) 2002-2003 ATI Research 
+//
+// See ATI-License.txt for license information
+//
+
+varying vec4 ECposition;   // surface position in eye coordinates
+varying vec4 ECballCenter; // ball center in eye coordinates
+uniform vec4 BallCenter;   // ball center in modelling coordinates
+
+void main()
+{ 
+//orig:    ECposition   = gl_ModelViewMatrix * gl_Vertex;
+
+    ECposition = gl_TextureMatrix[0] * gl_Vertex;
+    ECposition = gl_ModelViewMatrix * ECposition;
+
+    ECballCenter = gl_ModelViewMatrix * BallCenter;
+    gl_Position  = ftransform();
+}
diff --git a/progs/glsl/CH18-mandel.frag.txt b/progs/glsl/CH18-mandel.frag.txt
new file mode 100644
index 00000000000..a472d812526
--- /dev/null
+++ b/progs/glsl/CH18-mandel.frag.txt
@@ -0,0 +1,55 @@
+//
+// Fragment shader for drawing the Mandelbrot set
+//
+// Authors: Dave Baldwin, Steve Koren, Randi Rost
+//          based on a shader by Michael Rivero
+//
+// Copyright (c) 2002-2005: 3Dlabs, Inc.
+//
+// See 3Dlabs-License.txt for license information
+//
+
+varying vec3  Position;
+varying float LightIntensity;
+
+uniform float MaxIterations;
+uniform float Zoom;
+uniform float Xcenter;
+uniform float Ycenter;
+uniform vec3  InnerColor;
+uniform vec3  OuterColor1;
+uniform vec3  OuterColor2;
+
+void main()
+{
+    float   real  = Position.x * Zoom + Xcenter;
+    float   imag  = Position.y * Zoom + Ycenter;
+    float   Creal = real;   // Change this line...
+    float   Cimag = imag;   // ...and this one to get a Julia set
+
+    float r2 = 0.0;
+    float iter;
+
+//    for (iter = 0.0; iter < MaxIterations && r2 < 4.0; ++iter)
+    for (iter = 0.0; iter < 12 && r2 < 4.0; ++iter)
+    {
+        float tempreal = real;
+
+        real = (tempreal * tempreal) - (imag * imag) + Creal;
+        imag = 2.0 * tempreal * imag + Cimag;
+        r2   = (real * real) + (imag * imag);
+    }
+
+    // Base the color on the number of iterations
+
+    vec3 color;
+
+    if (r2 < 4.0)
+        color = InnerColor;
+    else
+        color = mix(OuterColor1, OuterColor2, fract(iter * 0.05));
+
+    color *= LightIntensity;
+
+    gl_FragColor = vec4(color, 1.0);
+}
diff --git a/progs/glsl/CH18-mandel.vert.txt b/progs/glsl/CH18-mandel.vert.txt
new file mode 100644
index 00000000000..c4ca66405d3
--- /dev/null
+++ b/progs/glsl/CH18-mandel.vert.txt
@@ -0,0 +1,35 @@
+//
+// Vertex shader for drawing the Mandelbrot set
+//
+// Authors: Dave Baldwin, Steve Koren, Randi Rost
+//          based on a shader by Michael Rivero
+//
+// Copyright (c) 2002-2005: 3Dlabs, Inc.
+//
+// See 3Dlabs-License.txt for license information
+//
+
+uniform vec3 LightPosition;
+uniform float SpecularContribution;
+uniform float DiffuseContribution;
+uniform float Shininess;
+
+varying float LightIntensity;
+varying vec3  Position;
+
+void main()
+{
+    vec3 ecPosition = vec3(gl_ModelViewMatrix * gl_Vertex);
+    vec3 tnorm      = normalize(gl_NormalMatrix * gl_Normal);
+    vec3 lightVec   = normalize(LightPosition - ecPosition);
+    vec3 reflectVec = reflect(-lightVec, tnorm);
+    vec3 viewVec    = normalize(-ecPosition);
+    float spec      = max(dot(reflectVec, viewVec), 0.0);
+    spec            = pow(spec, Shininess);
+    LightIntensity  = DiffuseContribution * 
+                          max(dot(lightVec, tnorm), 0.0) +
+                          SpecularContribution * spec;
+    Position        = vec3(gl_MultiTexCoord0 - 0.5) * 5.0;
+    gl_Position     = ftransform();
+
+}
\ No newline at end of file
diff --git a/progs/glsl/Makefile b/progs/glsl/Makefile
new file mode 100644
index 00000000000..e08d4102c88
--- /dev/null
+++ b/progs/glsl/Makefile
@@ -0,0 +1,74 @@
+# progs/demos/Makefile
+
+TOP = ../..
+include $(TOP)/configs/current
+
+INCDIR = $(TOP)/include
+
+OSMESA_LIBS = -L$(TOP)/$(LIB_DIR) -lglut -lOSMesa -lGLU -lGL $(APP_LIB_DEPS)
+
+OSMESA16_LIBS = -L$(TOP)/$(LIB_DIR) -lglut -lOSMesa16 -lGLU -lGL $(APP_LIB_DEPS)
+
+OSMESA32_LIBS = -L$(TOP)/$(LIB_DIR) -lglut -lOSMesa32 -lGLU -lGL $(APP_LIB_DEPS)
+
+LIB_DEP = $(TOP)/$(LIB_DIR)/$(GL_LIB_NAME) $(TOP)/$(LIB_DIR)/$(GLU_LIB_NAME) $(TOP)/$(LIB_DIR)/$(GLUT_LIB_NAME)
+
+PROGS = \
+	brick \
+	bump \
+	mandelbrot \
+	noise \
+	toyball \
+	texdemo1
+
+
+##### RULES #####
+
+.SUFFIXES:
+.SUFFIXES: .c
+
+
+# make executable from .c file:
+.c: $(LIB_DEP)
+	$(CC) -I$(INCDIR) $(CFLAGS) $< $(APP_LIB_DEPS) -o $@
+
+
+##### TARGETS #####
+
+default: $(PROGS)
+
+
+
+##### Extra dependencies
+
+extfuncs.h:  $(TOP)/progs/util/extfuncs.h
+	cp $< .
+
+readtex.c: $(TOP)/progs/util/readtex.c
+	cp $< .
+
+readtex.h: $(TOP)/progs/util/readtex.h
+	cp $< .
+
+readtex.o: readtex.c readtex.h
+	$(CC) -c -I$(INCDIR) $(CFLAGS) readtex.c
+
+brick.c: extfuncs.h
+
+bump.c: extfuncs.h
+
+mandelbrot.c: extfuncs.h
+
+toyball.c: extfuncs.h
+
+texdemo1: texdemo1.o readtex.o
+	$(CC) -I$(INCDIR) $(CFLAGS) texdemo1.o readtex.o $(APP_LIB_DEPS) -o $@
+
+texdemo1.o: texdemo1.c readtex.h extfuncs.h
+	$(CC) -c -I$(INCDIR) $(CFLAGS) texdemo1.c
+
+
+clean:
+	-rm -f $(PROGS)
+	-rm -f *.o *~
+	-rm -f extfuncs.h
diff --git a/progs/glsl/brick.c b/progs/glsl/brick.c
new file mode 100644
index 00000000000..522698b5d43
--- /dev/null
+++ b/progs/glsl/brick.c
@@ -0,0 +1,311 @@
+/**
+ * "Brick" shader demo.  Uses the example shaders from chapter 6 of
+ * the OpenGL Shading Language "orange" book.
+ * 10 Jan 2007
+ */
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/gl.h>
+#include <GL/glut.h>
+#include <GL/glext.h>
+#include "extfuncs.h"
+
+
+static char *FragProgFile = "CH06-brick.frag.txt";
+static char *VertProgFile = "CH06-brick.vert.txt";
+
+/* program/shader objects */
+static GLuint fragShader;
+static GLuint vertShader;
+static GLuint program;
+
+
+struct uniform_info {
+   const char *name;
+   GLuint size;
+   GLint location;
+   GLfloat value[4];
+};
+
+static struct uniform_info Uniforms[] = {
+   /* vert */
+   { "LightPosition",     3, -1, { 0.1, 0.1, 9.0, 0} },
+   /* frag */
+   { "BrickColor",        3, -1, { 0.8, 0.2, 0.2, 0 } },
+   { "MortarColor",       3, -1, { 0.6, 0.6, 0.6, 0 } },
+   { "BrickSize",         2, -1, { 1.0, 0.3, 0, 0 } },
+   { "BrickPct",          2, -1, { 0.9, 0.8, 0, 0 } },
+   { NULL, 0, 0, { 0, 0, 0, 0 } }
+};
+
+static GLint win = 0;
+
+
+static GLfloat xRot = 0.0f, yRot = 0.0f, zRot = 0.0f;
+
+
+
+
+static void
+Redisplay(void)
+{
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+   
+   glPushMatrix();
+   glRotatef(xRot, 1.0f, 0.0f, 0.0f);
+   glRotatef(yRot, 0.0f, 1.0f, 0.0f);
+   glRotatef(zRot, 0.0f, 0.0f, 1.0f);
+
+   glBegin(GL_POLYGON);
+   glTexCoord2f(0, 0);   glVertex2f(-2, -2);
+   glTexCoord2f(1, 0);   glVertex2f( 2, -2);
+   glTexCoord2f(1, 1);   glVertex2f( 2,  2);
+   glTexCoord2f(0, 1);   glVertex2f(-2,  2);
+   glEnd();
+
+   glPopMatrix();
+
+   glutSwapBuffers();
+}
+
+
+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, 5.0, 25.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef(0.0f, 0.0f, -15.0f);
+}
+
+
+static void
+CleanUp(void)
+{
+   glDeleteShader_func(fragShader);
+   glDeleteShader_func(vertShader);
+   glDeleteProgram_func(program);
+   glutDestroyWindow(win);
+}
+
+
+static void
+Key(unsigned char key, int x, int y)
+{
+  (void) x;
+  (void) y;
+
+   switch(key) {
+   case 'z':
+      zRot -= 1.0;
+      break;
+   case 'Z':
+      zRot += 1.0;
+      break;
+   case 27:
+      CleanUp();
+      exit(0);
+      break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+SpecialKey(int key, int x, int y)
+{
+   const GLfloat step = 3.0f;
+
+  (void) x;
+  (void) y;
+
+   switch(key) {
+   case GLUT_KEY_UP:
+      xRot -= step;
+      break;
+   case GLUT_KEY_DOWN:
+      xRot += step;
+      break;
+   case GLUT_KEY_LEFT:
+      yRot -= step;
+      break;
+   case GLUT_KEY_RIGHT:
+      yRot += step;
+      break;
+   }
+   glutPostRedisplay();
+}
+
+
+
+static void
+LoadAndCompileShader(GLuint shader, const char *text)
+{
+   GLint stat;
+
+   glShaderSource_func(shader, 1, (const GLchar **) &text, NULL);
+
+   glCompileShader_func(shader);
+
+   glGetShaderiv_func(shader, GL_COMPILE_STATUS, &stat);
+   if (!stat) {
+      GLchar log[1000];
+      GLsizei len;
+      glGetShaderInfoLog_func(shader, 1000, &len, log);
+      fprintf(stderr, "brick: problem compiling shader: %s\n", log);
+      exit(1);
+   }
+   else {
+      printf("Shader compiled OK\n");
+   }
+}
+
+
+/**
+ * Read a shader from a file.
+ */
+static void
+ReadShader(GLuint shader, const char *filename)
+{
+   const int max = 100*1000;
+   int n;
+   char *buffer = (char*) malloc(max);
+   FILE *f = fopen(filename, "r");
+   if (!f) {
+      fprintf(stderr, "brick: Unable to open shader file %s\n", filename);
+      exit(1);
+   }
+
+   n = fread(buffer, 1, max, f);
+   printf("brick: read %d bytes from shader file %s\n", n, filename);
+   if (n > 0) {
+      buffer[n] = 0;
+      LoadAndCompileShader(shader, buffer);
+   }
+
+   fclose(f);
+   free(buffer);
+}
+
+
+static void
+CheckLink(GLuint prog)
+{
+   GLint stat;
+   glGetProgramiv_func(prog, GL_LINK_STATUS, &stat);
+   if (!stat) {
+      GLchar log[1000];
+      GLsizei len;
+      glGetProgramInfoLog_func(prog, 1000, &len, log);
+      fprintf(stderr, "Linker error:\n%s\n", log);
+   }
+   else {
+      fprintf(stderr, "Link success!\n");
+   }
+}
+
+
+static void
+Init(void)
+{
+   const char *version;
+   GLint i;
+
+   version = (const char *) glGetString(GL_VERSION);
+   if (version[0] != '2' || version[1] != '.') {
+      printf("Warning: this program expects OpenGL 2.0\n");
+      /*exit(1);*/
+   }
+
+   GetExtensionFuncs();
+
+   vertShader = glCreateShader_func(GL_VERTEX_SHADER);
+   ReadShader(vertShader, VertProgFile);
+
+   fragShader = glCreateShader_func(GL_FRAGMENT_SHADER);
+   ReadShader(fragShader, FragProgFile);
+
+   program = glCreateProgram_func();
+   glAttachShader_func(program, fragShader);
+   glAttachShader_func(program, vertShader);
+   glLinkProgram_func(program);
+   CheckLink(program);
+   glUseProgram_func(program);
+
+   for (i = 0; Uniforms[i].name; i++) {
+      Uniforms[i].location
+         = glGetUniformLocation_func(program, Uniforms[i].name);
+      printf("Uniform %s location: %d\n", Uniforms[i].name,
+             Uniforms[i].location);
+      switch (Uniforms[i].size) {
+      case 1:
+         glUniform1fv_func(Uniforms[i].location, 1, Uniforms[i].value);
+         break;
+      case 2:
+         glUniform2fv_func(Uniforms[i].location, 1, Uniforms[i].value);
+         break;
+      case 3:
+         glUniform3fv_func(Uniforms[i].location, 1, Uniforms[i].value);
+         break;
+      case 4:
+         glUniform4fv_func(Uniforms[i].location, 1, Uniforms[i].value);
+         break;
+      default:
+         abort();
+      }
+   }
+
+   assert(glGetError() == 0);
+
+   glClearColor(0.4f, 0.4f, 0.8f, 0.0f);
+
+   printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
+
+   assert(glIsProgram_func(program));
+   assert(glIsShader_func(fragShader));
+   assert(glIsShader_func(vertShader));
+
+   glColor3f(1, 0, 0);
+}
+
+
+static void
+ParseOptions(int argc, char *argv[])
+{
+   int i;
+   for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "-fs") == 0) {
+         FragProgFile = argv[i+1];
+      }
+      else if (strcmp(argv[i], "-vs") == 0) {
+         VertProgFile = argv[i+1];
+      }
+   }
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   glutInit(&argc, argv);
+   glutInitWindowPosition( 0, 0);
+   glutInitWindowSize(400, 400);
+   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
+   win = glutCreateWindow(argv[0]);
+   glutReshapeFunc(Reshape);
+   glutKeyboardFunc(Key);
+   glutSpecialFunc(SpecialKey);
+   glutDisplayFunc(Redisplay);
+   ParseOptions(argc, argv);
+   Init();
+   glutMainLoop();
+   return 0;
+}
+
diff --git a/progs/glsl/bump.c b/progs/glsl/bump.c
new file mode 100644
index 00000000000..a6846acf7e4
--- /dev/null
+++ b/progs/glsl/bump.c
@@ -0,0 +1,411 @@
+/**
+ * Procedural Bump Mapping demo.  Uses the example shaders from
+ * chapter 11 of the OpenGL Shading Language "orange" book.
+ * 16 Jan 2007
+ */
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/glut.h>
+#include <GL/glu.h>
+#include <GL/glext.h>
+#include "extfuncs.h"
+
+
+static char *FragProgFile = "CH11-bumpmap.frag.txt";
+static char *VertProgFile = "CH11-bumpmap.vert.txt";
+
+/* program/shader objects */
+static GLuint fragShader;
+static GLuint vertShader;
+static GLuint program;
+
+
+struct uniform_info {
+   const char *name;
+   GLuint size;
+   GLint location;
+   GLfloat value[4];
+};
+
+static struct uniform_info Uniforms[] = {
+   { "LightPosition",       3, -1, { 0.57737, 0.57735, 0.57735, 0.0 } },
+   { "SurfaceColor",        3, -1, { 0.8, 0.8, 0.2, 0 } },
+   { "BumpDensity",         1, -1, { 10.0, 0, 0, 0 } },
+   { "BumpSize",            1, -1, { 0.125, 0, 0, 0 } },
+   { "SpecularFactor",      1, -1, { 0.5, 0, 0, 0 } },
+   { NULL, 0, 0, { 0, 0, 0, 0 } }
+};
+
+static GLint win = 0;
+
+static GLfloat xRot = 20.0f, yRot = 0.0f, zRot = 0.0f;
+
+static GLuint tangentAttrib;
+
+static GLboolean Anim = GL_FALSE;
+
+
+static void
+CheckError(int line)
+{
+   GLenum err = glGetError();
+   if (err) {
+      printf("GL Error %s (0x%x) at line %d\n",
+             gluErrorString(err), (int) err, line);
+   }
+}
+
+/*
+ * Draw a square, specifying normal and tangent vectors.
+ */
+static void
+Square(GLfloat size)
+{
+   glNormal3f(0, 0, 1);
+   glVertexAttrib3f_func(tangentAttrib, 1, 0, 0);
+   glBegin(GL_POLYGON);
+   glTexCoord2f(0, 0);  glVertex2f(-size, -size);
+   glTexCoord2f(1, 0);  glVertex2f( size, -size);
+   glTexCoord2f(1, 1);  glVertex2f( size,  size);
+   glTexCoord2f(0, 1);  glVertex2f(-size,  size);
+   glEnd();
+}
+
+
+static void
+Cube(GLfloat size)
+{
+   /* +X */
+   glPushMatrix();
+   glRotatef(90, 0, 1, 0);
+   glTranslatef(0, 0, size);
+   Square(size);
+   glPopMatrix();
+
+   /* -X */
+   glPushMatrix();
+   glRotatef(-90, 0, 1, 0);
+   glTranslatef(0, 0, size);
+   Square(size);
+   glPopMatrix();
+
+   /* +Y */
+   glPushMatrix();
+   glRotatef(90, 1, 0, 0);
+   glTranslatef(0, 0, size);
+   Square(size);
+   glPopMatrix();
+
+   /* -Y */
+   glPushMatrix();
+   glRotatef(-90, 1, 0, 0);
+   glTranslatef(0, 0, size);
+   Square(size);
+   glPopMatrix();
+
+
+   /* +Z */
+   glPushMatrix();
+   glTranslatef(0, 0, size);
+   Square(size);
+   glPopMatrix();
+
+   /* -Z */
+   glPushMatrix();
+   glRotatef(180, 0, 1, 0);
+   glTranslatef(0, 0, size);
+   Square(size);
+   glPopMatrix();
+
+}
+
+
+static void
+Idle(void)
+{
+   GLint t = glutGet(GLUT_ELAPSED_TIME);
+   yRot  = t * 0.05;
+   glutPostRedisplay();
+}
+
+
+static void
+Redisplay(void)
+{
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+   
+   glPushMatrix();
+   glRotatef(xRot, 1.0f, 0.0f, 0.0f);
+   glRotatef(yRot, 0.0f, 1.0f, 0.0f);
+   glRotatef(zRot, 0.0f, 0.0f, 1.0f);
+
+   Cube(1.5);
+
+   glPopMatrix();
+
+   glFinish();
+   glFlush();
+
+   CheckError(__LINE__);
+
+   glutSwapBuffers();
+}
+
+
+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, 5.0, 25.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef(0.0f, 0.0f, -15.0f);
+}
+
+
+static void
+CleanUp(void)
+{
+   glDeleteShader_func(fragShader);
+   glDeleteShader_func(vertShader);
+   glDeleteProgram_func(program);
+   glutDestroyWindow(win);
+}
+
+
+static void
+Key(unsigned char key, int x, int y)
+{
+   const GLfloat step = 2.0;
+  (void) x;
+  (void) y;
+
+   switch(key) {
+   case 'a':
+      Anim = !Anim;
+      glutIdleFunc(Anim ? Idle : NULL);
+      break;
+   case 'z':
+      zRot += step;
+      break;
+   case 'Z':
+      zRot -= step;
+      break;
+   case 27:
+      CleanUp();
+      exit(0);
+      break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+SpecialKey(int key, int x, int y)
+{
+   const GLfloat step = 2.0;
+
+  (void) x;
+  (void) y;
+
+   switch(key) {
+   case GLUT_KEY_UP:
+      xRot += step;
+      break;
+   case GLUT_KEY_DOWN:
+      xRot -= step;
+      break;
+   case GLUT_KEY_LEFT:
+      yRot -= step;
+      break;
+   case GLUT_KEY_RIGHT:
+      yRot += step;
+      break;
+   }
+   glutPostRedisplay();
+}
+
+
+
+static void
+LoadAndCompileShader(GLuint shader, const char *text)
+{
+   GLint stat;
+
+   glShaderSource_func(shader, 1, (const GLchar **) &text, NULL);
+
+   glCompileShader_func(shader);
+
+   glGetShaderiv_func(shader, GL_COMPILE_STATUS, &stat);
+   if (!stat) {
+      GLchar log[1000];
+      GLsizei len;
+      glGetShaderInfoLog_func(shader, 1000, &len, log);
+      fprintf(stderr, "brick: problem compiling shader: %s\n", log);
+      exit(1);
+   }
+   else {
+      printf("Shader compiled OK\n");
+   }
+}
+
+
+/**
+ * Read a shader from a file.
+ */
+static void
+ReadShader(GLuint shader, const char *filename)
+{
+   const int max = 100*1000;
+   int n;
+   char *buffer = (char*) malloc(max);
+   FILE *f = fopen(filename, "r");
+   if (!f) {
+      fprintf(stderr, "brick: Unable to open shader file %s\n", filename);
+      exit(1);
+   }
+
+   n = fread(buffer, 1, max, f);
+   printf("brick: read %d bytes from shader file %s\n", n, filename);
+   if (n > 0) {
+      buffer[n] = 0;
+      LoadAndCompileShader(shader, buffer);
+   }
+
+   fclose(f);
+   free(buffer);
+}
+
+
+static void
+CheckLink(GLuint prog)
+{
+   GLint stat;
+   glGetProgramiv_func(prog, GL_LINK_STATUS, &stat);
+   if (!stat) {
+      GLchar log[1000];
+      GLsizei len;
+      glGetProgramInfoLog_func(prog, 1000, &len, log);
+      fprintf(stderr, "Linker error:\n%s\n", log);
+   }
+   else {
+      fprintf(stderr, "Link success!\n");
+   }
+}
+
+
+static void
+Init(void)
+{
+   const char *version;
+   GLint i;
+
+   version = (const char *) glGetString(GL_VERSION);
+   if (version[0] != '2' || version[1] != '.') {
+      printf("Warning: this program expects OpenGL 2.0\n");
+      /*exit(1);*/
+   }
+   printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
+
+   GetExtensionFuncs();
+
+   vertShader = glCreateShader_func(GL_VERTEX_SHADER);
+   ReadShader(vertShader, VertProgFile);
+
+   fragShader = glCreateShader_func(GL_FRAGMENT_SHADER);
+   ReadShader(fragShader, FragProgFile);
+
+   program = glCreateProgram_func();
+   glAttachShader_func(program, fragShader);
+   glAttachShader_func(program, vertShader);
+   glLinkProgram_func(program);
+   CheckLink(program);
+   glUseProgram_func(program);
+
+   assert(glIsProgram_func(program));
+   assert(glIsShader_func(fragShader));
+   assert(glIsShader_func(vertShader));
+
+   assert(glGetError() == 0);
+
+   CheckError(__LINE__);
+
+   for (i = 0; Uniforms[i].name; i++) {
+      Uniforms[i].location
+         = glGetUniformLocation_func(program, Uniforms[i].name);
+      printf("Uniform %s location: %d\n", Uniforms[i].name,
+             Uniforms[i].location);
+      switch (Uniforms[i].size) {
+      case 1:
+         glUniform1fv_func(Uniforms[i].location, 1, Uniforms[i].value);
+         break;
+      case 2:
+         glUniform2fv_func(Uniforms[i].location, 1, Uniforms[i].value);
+         break;
+      case 3:
+         glUniform3fv_func(Uniforms[i].location, 1, Uniforms[i].value);
+         break;
+      case 4:
+         glUniform4fv_func(Uniforms[i].location, 1, Uniforms[i].value);
+         break;
+      default:
+         abort();
+      }
+   }
+
+   CheckError(__LINE__);
+
+   tangentAttrib = glGetAttribLocation_func(program, "Tangent");
+   printf("Tangent Attrib: %d\n", tangentAttrib);
+
+   assert(tangentAttrib >= 0);
+
+   CheckError(__LINE__);
+
+   glClearColor(0.4f, 0.4f, 0.8f, 0.0f);
+
+   glEnable(GL_DEPTH_TEST);
+
+   glColor3f(1, 0, 0);
+}
+
+
+static void
+ParseOptions(int argc, char *argv[])
+{
+   int i;
+   for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "-fs") == 0) {
+         FragProgFile = argv[i+1];
+      }
+      else if (strcmp(argv[i], "-vs") == 0) {
+         VertProgFile = argv[i+1];
+      }
+   }
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   glutInit(&argc, argv);
+   glutInitWindowPosition( 0, 0);
+   glutInitWindowSize(400, 400);
+   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
+   win = glutCreateWindow(argv[0]);
+   glutReshapeFunc(Reshape);
+   glutKeyboardFunc(Key);
+   glutSpecialFunc(SpecialKey);
+   glutDisplayFunc(Redisplay);
+   ParseOptions(argc, argv);
+   Init();
+   glutMainLoop();
+   return 0;
+}
+
diff --git a/progs/glsl/cubemap.frag.txt b/progs/glsl/cubemap.frag.txt
new file mode 100644
index 00000000000..9c27648aaf9
--- /dev/null
+++ b/progs/glsl/cubemap.frag.txt
@@ -0,0 +1,18 @@
+// Fragment shader for cube-texture reflection mapping
+// Brian Paul
+
+
+uniform samplerCube cubeTex;
+varying vec3 normal;
+uniform vec3 lightPos;
+
+void main()
+{
+   // simple diffuse, specular lighting:
+   vec3 lp = normalize(lightPos);
+   float dp = dot(lp, normalize(normal));
+   float spec = pow(dp, 5.0);
+
+   // final color:
+   gl_FragColor = dp * textureCube(cubeTex, gl_TexCoord[0].xyz, 0.0) + spec;
+}
diff --git a/progs/glsl/mandelbrot.c b/progs/glsl/mandelbrot.c
new file mode 100644
index 00000000000..7a2bad6dde3
--- /dev/null
+++ b/progs/glsl/mandelbrot.c
@@ -0,0 +1,328 @@
+/**
+ * "Mandelbrot" shader demo.  Uses the example shaders from
+ * chapter 15 (or 18) of the OpenGL Shading Language "orange" book.
+ * 15 Jan 2007
+ */
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/gl.h>
+#include <GL/glut.h>
+#include <GL/glext.h>
+#include "extfuncs.h"
+
+
+static char *FragProgFile = "CH18-mandel.frag.txt";
+static char *VertProgFile = "CH18-mandel.vert.txt";
+
+/* program/shader objects */
+static GLuint fragShader;
+static GLuint vertShader;
+static GLuint program;
+
+
+struct uniform_info {
+   const char *name;
+   GLuint size;
+   GLint location;
+   GLfloat value[4];
+};
+
+static struct uniform_info Uniforms[] = {
+   /* vert */
+   { "LightPosition",        3, -1, { 0.1, 0.1, 9.0, 0} },
+   { "SpecularContribution", 1, -1, { 0.5, 0, 0, 0 } },
+   { "DiffuseContribution",  1, -1, { 0.5, 0, 0, 0 } },
+   { "Shininess",            1, -1, { 20.0, 0, 0, 0 } },
+   /* frag */
+   { "MaxIterations",        1, -1, { 12, 0, 0, 0 } },
+   { "Zoom",                 1, -1, { 0.125, 0, 0, 0 } },
+   { "Xcenter",              1, -1, { -1.5, 0, 0, 0 } },
+   { "Ycenter",              1, -1, { .005, 0, 0, 0 } },
+   { "InnerColor",           3, -1, { 1, 0, 0, 0 } },
+   { "OuterColor1",          3, -1, { 0, 1, 0, 0 } },
+   { "OuterColor2",          3, -1, { 0, 0, 1, 0 } },
+   { NULL, 0, 0, { 0, 0, 0, 0 } }
+};
+
+static GLint win = 0;
+
+static GLfloat xRot = 0.0f, yRot = 0.0f, zRot = 0.0f;
+
+static GLint uZoom, uXcenter, uYcenter;
+static GLfloat zoom = 1.0, xCenter = -1.5, yCenter = 0.0;
+
+
+static void
+Redisplay(void)
+{
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+   
+   /* set interactive uniform parameters */
+   glUniform1fv_func(uZoom, 1, &zoom);
+   glUniform1fv_func(uXcenter, 1, &xCenter);
+   glUniform1fv_func(uYcenter, 1, &yCenter);
+
+   glPushMatrix();
+   glRotatef(xRot, 1.0f, 0.0f, 0.0f);
+   glRotatef(yRot, 0.0f, 1.0f, 0.0f);
+   glRotatef(zRot, 0.0f, 0.0f, 1.0f);
+
+   glBegin(GL_POLYGON);
+   glTexCoord2f(0, 0);   glVertex2f(-1, -1);
+   glTexCoord2f(1, 0);   glVertex2f( 1, -1);
+   glTexCoord2f(1, 1);   glVertex2f( 1,  1);
+   glTexCoord2f(0, 1);   glVertex2f(-1,  1);
+   glEnd();
+
+   glPopMatrix();
+
+   glFinish();
+   glFlush();
+   glutSwapBuffers();
+}
+
+
+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, 5.0, 25.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef(0.0f, 0.0f, -6.0f);
+}
+
+
+static void
+CleanUp(void)
+{
+   glDeleteShader_func(fragShader);
+   glDeleteShader_func(vertShader);
+   glDeleteProgram_func(program);
+   glutDestroyWindow(win);
+}
+
+
+static void
+Key(unsigned char key, int x, int y)
+{
+  (void) x;
+  (void) y;
+
+   switch(key) {
+   case 'z':
+      zoom *= 0.9;
+      break;
+   case 'Z':
+      zoom /= 0.9;
+      break;
+   case 27:
+      CleanUp();
+      exit(0);
+      break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+SpecialKey(int key, int x, int y)
+{
+   const GLfloat step = 0.1 * zoom;
+
+  (void) x;
+  (void) y;
+
+   switch(key) {
+   case GLUT_KEY_UP:
+      yCenter += step;
+      break;
+   case GLUT_KEY_DOWN:
+      yCenter -= step;
+      break;
+   case GLUT_KEY_LEFT:
+      xCenter -= step;
+      break;
+   case GLUT_KEY_RIGHT:
+      xCenter += step;
+      break;
+   }
+   glutPostRedisplay();
+}
+
+
+
+static void
+LoadAndCompileShader(GLuint shader, const char *text)
+{
+   GLint stat;
+
+   glShaderSource_func(shader, 1, (const GLchar **) &text, NULL);
+
+   glCompileShader_func(shader);
+
+   glGetShaderiv_func(shader, GL_COMPILE_STATUS, &stat);
+   if (!stat) {
+      GLchar log[1000];
+      GLsizei len;
+      glGetShaderInfoLog_func(shader, 1000, &len, log);
+      fprintf(stderr, "brick: problem compiling shader: %s\n", log);
+      exit(1);
+   }
+   else {
+      printf("Shader compiled OK\n");
+   }
+}
+
+
+/**
+ * Read a shader from a file.
+ */
+static void
+ReadShader(GLuint shader, const char *filename)
+{
+   const int max = 100*1000;
+   int n;
+   char *buffer = (char*) malloc(max);
+   FILE *f = fopen(filename, "r");
+   if (!f) {
+      fprintf(stderr, "brick: Unable to open shader file %s\n", filename);
+      exit(1);
+   }
+
+   n = fread(buffer, 1, max, f);
+   printf("brick: read %d bytes from shader file %s\n", n, filename);
+   if (n > 0) {
+      buffer[n] = 0;
+      LoadAndCompileShader(shader, buffer);
+   }
+
+   fclose(f);
+   free(buffer);
+}
+
+
+static void
+CheckLink(GLuint prog)
+{
+   GLint stat;
+   glGetProgramiv_func(prog, GL_LINK_STATUS, &stat);
+   if (!stat) {
+      GLchar log[1000];
+      GLsizei len;
+      glGetProgramInfoLog_func(prog, 1000, &len, log);
+      fprintf(stderr, "Linker error:\n%s\n", log);
+   }
+   else {
+      fprintf(stderr, "Link success!\n");
+   }
+}
+
+
+static void
+Init(void)
+{
+   const char *version;
+   GLint i;
+
+   version = (const char *) glGetString(GL_VERSION);
+   if (version[0] != '2' || version[1] != '.') {
+      printf("Warning: this program expects OpenGL 2.0\n");
+      /*exit(1);*/
+   }
+
+   GetExtensionFuncs();
+
+   vertShader = glCreateShader_func(GL_VERTEX_SHADER);
+   ReadShader(vertShader, VertProgFile);
+
+   fragShader = glCreateShader_func(GL_FRAGMENT_SHADER);
+   ReadShader(fragShader, FragProgFile);
+
+   program = glCreateProgram_func();
+   glAttachShader_func(program, fragShader);
+   glAttachShader_func(program, vertShader);
+   glLinkProgram_func(program);
+   CheckLink(program);
+   glUseProgram_func(program);
+
+   for (i = 0; Uniforms[i].name; i++) {
+      Uniforms[i].location
+         = glGetUniformLocation_func(program, Uniforms[i].name);
+      printf("Uniform %s location: %d\n", Uniforms[i].name,
+             Uniforms[i].location);
+      switch (Uniforms[i].size) {
+      case 1:
+         glUniform1fv_func(Uniforms[i].location, 1, Uniforms[i].value);
+         break;
+      case 2:
+         glUniform2fv_func(Uniforms[i].location, 1, Uniforms[i].value);
+         break;
+      case 3:
+         glUniform3fv_func(Uniforms[i].location, 1, Uniforms[i].value);
+         break;
+      case 4:
+         glUniform4fv_func(Uniforms[i].location, 1, Uniforms[i].value);
+         break;
+      default:
+         abort();
+      }
+   }
+
+   uZoom = glGetUniformLocation_func(program, "Zoom");
+   uXcenter = glGetUniformLocation_func(program, "Xcenter");
+   uYcenter = glGetUniformLocation_func(program, "Ycenter");
+
+   assert(glGetError() == 0);
+
+   glClearColor(0.4f, 0.4f, 0.8f, 0.0f);
+
+   printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
+
+   assert(glIsProgram_func(program));
+   assert(glIsShader_func(fragShader));
+   assert(glIsShader_func(vertShader));
+
+   glColor3f(1, 0, 0);
+}
+
+
+static void
+ParseOptions(int argc, char *argv[])
+{
+   int i;
+   for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "-fs") == 0) {
+         FragProgFile = argv[i+1];
+      }
+      else if (strcmp(argv[i], "-vs") == 0) {
+         VertProgFile = argv[i+1];
+      }
+   }
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   glutInit(&argc, argv);
+   glutInitWindowPosition( 0, 0);
+   glutInitWindowSize(400, 400);
+   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
+   win = glutCreateWindow(argv[0]);
+   glutReshapeFunc(Reshape);
+   glutKeyboardFunc(Key);
+   glutSpecialFunc(SpecialKey);
+   glutDisplayFunc(Redisplay);
+   ParseOptions(argc, argv);
+   Init();
+   glutMainLoop();
+   return 0;
+}
+
diff --git a/progs/glsl/noise.c b/progs/glsl/noise.c
new file mode 100644
index 00000000000..a26a8059449
--- /dev/null
+++ b/progs/glsl/noise.c
@@ -0,0 +1,297 @@
+/**
+ * Test noise() functions.
+ * 28 Jan 2007
+ */
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/gl.h>
+#include <GL/glut.h>
+#include <GL/glext.h>
+#include "extfuncs.h"
+
+
+static const char *VertShaderText =
+   "void main() {\n"
+   "   gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
+   "   gl_TexCoord[0] = gl_MultiTexCoord0;\n"
+   "}\n";
+
+static const char *FragShaderText =
+   "uniform vec4 Scale, Bias;\n"
+   "uniform float Slice;\n"
+   "void main()\n"
+   "{\n"
+   "   vec4 scale = vec4(5.0);\n"
+   "   vec4 p;\n"
+   "   p.xy = gl_TexCoord[0].xy;\n"
+   "   p.z = Slice;\n"
+   "   vec4 n = noise4(p * scale);\n"
+   "   gl_FragColor = n * Scale + Bias;\n"
+   "}\n";
+
+
+struct uniform_info {
+   const char *name;
+   GLuint size;
+   GLint location;
+   GLfloat value[4];
+};
+
+static struct uniform_info Uniforms[] = {
+   { "Scale",          4, -1, { 0.5, 0.4, 0.0, 0} },
+   { "Bias",           4, -1, { 0.5, 0.3, 0.0, 0} },
+   { "Slice",          1, -1, { 0.5, 0, 0, 0} },
+   { NULL, 0, 0, { 0, 0, 0, 0 } }
+};
+
+/* program/shader objects */
+static GLuint fragShader;
+static GLuint vertShader;
+static GLuint program;
+
+static GLint win = 0;
+static GLfloat xRot = 0.0f, yRot = 0.0f, zRot = 0.0f;
+static GLfloat Slice = 0.0;
+static GLboolean Anim = GL_FALSE;
+
+
+static void
+Idle(void)
+{
+   Slice += 0.01;
+   glutPostRedisplay();
+}
+
+
+static void
+Redisplay(void)
+{
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+   
+   glUniform1fv_func(Uniforms[2].location, 1, &Slice);
+
+   glPushMatrix();
+   glRotatef(xRot, 1.0f, 0.0f, 0.0f);
+   glRotatef(yRot, 0.0f, 1.0f, 0.0f);
+   glRotatef(zRot, 0.0f, 0.0f, 1.0f);
+
+   glBegin(GL_POLYGON);
+   glTexCoord2f(0, 0);   glVertex2f(-2, -2);
+   glTexCoord2f(1, 0);   glVertex2f( 2, -2);
+   glTexCoord2f(1, 1);   glVertex2f( 2,  2);
+   glTexCoord2f(0, 1);   glVertex2f(-2,  2);
+   glEnd();
+
+   glPopMatrix();
+
+   glutSwapBuffers();
+}
+
+
+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, 5.0, 25.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef(0.0f, 0.0f, -15.0f);
+}
+
+
+static void
+CleanUp(void)
+{
+   glDeleteShader_func(fragShader);
+   glDeleteShader_func(vertShader);
+   glDeleteProgram_func(program);
+   glutDestroyWindow(win);
+}
+
+
+static void
+Key(unsigned char key, int x, int y)
+{
+   const GLfloat step = 0.01;
+  (void) x;
+  (void) y;
+
+   switch(key) {
+   case 'a':
+      Anim = !Anim;
+      glutIdleFunc(Anim ? Idle : NULL);
+   case 's':
+      Slice -= step;
+      break;
+   case 'S':
+      Slice += step;
+      break;
+   case 'z':
+      zRot -= 1.0;
+      break;
+   case 'Z':
+      zRot += 1.0;
+      break;
+   case 27:
+      CleanUp();
+      exit(0);
+      break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+SpecialKey(int key, int x, int y)
+{
+   const GLfloat step = 3.0f;
+
+  (void) x;
+  (void) y;
+
+   switch(key) {
+   case GLUT_KEY_UP:
+      xRot -= step;
+      break;
+   case GLUT_KEY_DOWN:
+      xRot += step;
+      break;
+   case GLUT_KEY_LEFT:
+      yRot -= step;
+      break;
+   case GLUT_KEY_RIGHT:
+      yRot += step;
+      break;
+   }
+   glutPostRedisplay();
+}
+
+
+
+static void
+LoadAndCompileShader(GLuint shader, const char *text)
+{
+   GLint stat;
+
+   glShaderSource_func(shader, 1, (const GLchar **) &text, NULL);
+
+   glCompileShader_func(shader);
+
+   glGetShaderiv_func(shader, GL_COMPILE_STATUS, &stat);
+   if (!stat) {
+      GLchar log[1000];
+      GLsizei len;
+      glGetShaderInfoLog_func(shader, 1000, &len, log);
+      fprintf(stderr, "brick: problem compiling shader: %s\n", log);
+      exit(1);
+   }
+   else {
+      printf("Shader compiled OK\n");
+   }
+}
+
+
+static void
+CheckLink(GLuint prog)
+{
+   GLint stat;
+   glGetProgramiv_func(prog, GL_LINK_STATUS, &stat);
+   if (!stat) {
+      GLchar log[1000];
+      GLsizei len;
+      glGetProgramInfoLog_func(prog, 1000, &len, log);
+      fprintf(stderr, "Linker error:\n%s\n", log);
+   }
+   else {
+      fprintf(stderr, "Link success!\n");
+   }
+}
+
+
+static void
+Init(void)
+{
+   const char *version;
+   GLint i;
+
+   version = (const char *) glGetString(GL_VERSION);
+   if (version[0] != '2' || version[1] != '.') {
+      printf("Warning: this program expects OpenGL 2.0\n");
+      /*exit(1);*/
+   }
+
+   GetExtensionFuncs();
+
+   vertShader = glCreateShader_func(GL_VERTEX_SHADER);
+   LoadAndCompileShader(vertShader, VertShaderText);
+
+   fragShader = glCreateShader_func(GL_FRAGMENT_SHADER);
+   LoadAndCompileShader(fragShader, FragShaderText);
+
+   program = glCreateProgram_func();
+   glAttachShader_func(program, fragShader);
+   glAttachShader_func(program, vertShader);
+   glLinkProgram_func(program);
+   CheckLink(program);
+   glUseProgram_func(program);
+
+   for (i = 0; Uniforms[i].name; i++) {
+      Uniforms[i].location
+         = glGetUniformLocation_func(program, Uniforms[i].name);
+      printf("Uniform %s location: %d\n", Uniforms[i].name,
+             Uniforms[i].location);
+      switch (Uniforms[i].size) {
+      case 1:
+         glUniform1fv_func(Uniforms[i].location, 1, Uniforms[i].value);
+         break;
+      case 2:
+         glUniform2fv_func(Uniforms[i].location, 1, Uniforms[i].value);
+         break;
+      case 3:
+         glUniform3fv_func(Uniforms[i].location, 1, Uniforms[i].value);
+         break;
+      case 4:
+         glUniform4fv_func(Uniforms[i].location, 1, Uniforms[i].value);
+         break;
+      default:
+         abort();
+      }
+   }
+
+   assert(glGetError() == 0);
+
+   glClearColor(0.4f, 0.4f, 0.8f, 0.0f);
+
+   printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
+
+   assert(glIsProgram_func(program));
+   assert(glIsShader_func(fragShader));
+   assert(glIsShader_func(vertShader));
+
+   glColor3f(1, 0, 0);
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   glutInit(&argc, argv);
+   glutInitWindowPosition( 0, 0);
+   glutInitWindowSize(400, 400);
+   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
+   win = glutCreateWindow(argv[0]);
+   glutReshapeFunc(Reshape);
+   glutKeyboardFunc(Key);
+   glutSpecialFunc(SpecialKey);
+   glutDisplayFunc(Redisplay);
+   Init();
+   glutMainLoop();
+   return 0;
+}
+
diff --git a/progs/glsl/reflect.vert.txt b/progs/glsl/reflect.vert.txt
new file mode 100644
index 00000000000..402be38bf7b
--- /dev/null
+++ b/progs/glsl/reflect.vert.txt
@@ -0,0 +1,19 @@
+// Vertex shader for cube-texture reflection mapping
+// Brian Paul
+
+
+varying vec3 normal;
+
+void main() 
+{
+   vec3 n = gl_NormalMatrix * gl_Normal;
+   vec3 u = normalize(vec3(gl_ModelViewMatrix * gl_Vertex));
+   float two_n_dot_u = 2.0 * dot(n, u);
+   vec4 f;
+   f.xyz = u - n * two_n_dot_u;
+
+   // outputs
+   normal = n;
+   gl_TexCoord[0] = gl_TextureMatrix[0] * f;
+   gl_Position = ftransform();
+}
diff --git a/progs/glsl/shadowtex.frag.txt b/progs/glsl/shadowtex.frag.txt
new file mode 100644
index 00000000000..a6a80da47f2
--- /dev/null
+++ b/progs/glsl/shadowtex.frag.txt
@@ -0,0 +1,21 @@
+// Fragment shader for 2D texture with shadow attenuation
+// Brian Paul
+
+
+uniform sampler2D tex2d;
+uniform vec3 lightPos;
+
+void main()
+{
+   // XXX should compute this from lightPos
+   vec2 shadowCenter = vec2(-0.25, -0.25);
+
+   // d = distance from center
+   float d = distance(gl_TexCoord[0].xy, shadowCenter);
+
+   // attenuate and clamp
+   d = clamp(d * d * d, 0.0, 2.0);
+
+   // modulate texture by d for shadow effect
+   gl_FragColor = d * texture2D(tex2d, gl_TexCoord[0].xy, 0.0);
+}
diff --git a/progs/glsl/simple.vert.txt b/progs/glsl/simple.vert.txt
new file mode 100644
index 00000000000..a0abe0dc0b2
--- /dev/null
+++ b/progs/glsl/simple.vert.txt
@@ -0,0 +1,9 @@
+// Simple vertex shader
+// Brian Paul
+
+
+void main() 
+{
+   gl_TexCoord[0] = gl_MultiTexCoord0;
+   gl_Position = ftransform();
+}
diff --git a/progs/glsl/texdemo1.c b/progs/glsl/texdemo1.c
new file mode 100644
index 00000000000..d29ecf452b1
--- /dev/null
+++ b/progs/glsl/texdemo1.c
@@ -0,0 +1,570 @@
+/**
+ * Test texturing with GL shading language.
+ *
+ * Copyright (C) 2007  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 <assert.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "GL/glut.h"
+#include "readtex.h"
+#include "extfuncs.h"
+
+static const char *Demo = "texdemo1";
+
+static const char *ReflectVertFile = "reflect.vert.txt";
+static const char *CubeFragFile = "cubemap.frag.txt";
+
+static const char *SimpleVertFile = "simple.vert.txt";
+static const char *SimpleTexFragFile = "shadowtex.frag.txt";
+
+static const char *GroundImage = "../images/tile.rgb";
+
+static GLuint Program1, Program2;
+
+static GLfloat TexXrot = 0, TexYrot = 0;
+static GLfloat Xrot = 20.0, Yrot = 20.0, Zrot = 0.0;
+static GLfloat EyeDist = 10;
+static GLboolean Anim = GL_TRUE;
+
+
+struct uniform_info {
+   const char *name;
+   GLuint size;
+   GLint location;
+   GLenum type;  /**< GL_FLOAT or GL_INT */
+   GLfloat value[4];
+};
+
+static struct uniform_info ReflectUniforms[] = {
+   { "cubeTex",  1, -1, GL_INT, { 0, 0, 0, 0 } },
+   { "lightPos", 3, -1, GL_FLOAT, { 10, 10, 20, 0 } },
+   { NULL, 0, 0, 0, { 0, 0, 0, 0 } }
+};
+
+static struct uniform_info SimpleUniforms[] = {
+   { "tex2d",    1, -1, GL_INT,   { 1, 0, 0, 0 } },
+   { "lightPos", 3, -1, GL_FLOAT, { 10, 10, 20, 0 } },
+   { NULL, 0, 0, 0, { 0, 0, 0, 0 } }
+};
+
+
+static void
+CheckError(int line)
+{
+   GLenum err = glGetError();
+   if (err) {
+      printf("GL Error %s (0x%x) at line %d\n",
+             gluErrorString(err), (int) err, line);
+   }
+}
+
+
+static void
+DrawGround(GLfloat size)
+{
+   glPushMatrix();
+   glRotatef(90, 1, 0, 0);
+   glNormal3f(0, 0, 1);
+   glBegin(GL_POLYGON);
+   glTexCoord2f(-2, -2);  glVertex2f(-size, -size);
+   glTexCoord2f( 2, -2);  glVertex2f( size, -size);
+   glTexCoord2f( 2,  2);  glVertex2f( size,  size);
+   glTexCoord2f(-2,  2);  glVertex2f(-size,  size);
+   glEnd();
+   glPopMatrix();
+}
+
+
+static void
+draw(void)
+{
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   glEnable(GL_TEXTURE_2D);
+
+   glPushMatrix(); /* modelview matrix */
+      glTranslatef(0.0, 0.0, -EyeDist);
+      glRotatef(Xrot, 1, 0, 0);
+      glRotatef(Yrot, 0, 1, 0);
+      glRotatef(Zrot, 0, 0, 1);
+
+      /* sphere w/ reflection map */
+      glPushMatrix();
+         glTranslatef(0, 1, 0);
+         glUseProgram_func(Program1);
+
+         /* setup texture matrix */
+         glActiveTexture(GL_TEXTURE0);
+         glMatrixMode(GL_TEXTURE);
+         glLoadIdentity();
+         glRotatef(-TexYrot, 0, 1, 0);
+         glRotatef(-TexXrot, 1, 0, 0);
+
+         glEnable(GL_TEXTURE_GEN_S);
+         glEnable(GL_TEXTURE_GEN_T);
+         glEnable(GL_TEXTURE_GEN_R);
+         glutSolidSphere(2.0, 20, 20);
+
+         glLoadIdentity(); /* texture matrix */
+         glMatrixMode(GL_MODELVIEW);
+      glPopMatrix();
+
+      /* ground */
+      glUseProgram_func(Program2);
+      glTranslatef(0, -1.0, 0);
+      DrawGround(5);
+
+   glPopMatrix();
+
+   glutSwapBuffers();
+}
+
+
+static void
+idle(void)
+{
+   GLfloat t = 0.05 * glutGet(GLUT_ELAPSED_TIME);
+   TexYrot = t;
+   glutPostRedisplay();
+}
+
+
+static void
+key(unsigned char k, int x, int y)
+{
+   (void) x;
+   (void) y;
+   switch (k) {
+   case ' ':
+   case 'a':
+      Anim = !Anim;
+      if (Anim)
+         glutIdleFunc(idle);
+      else
+         glutIdleFunc(NULL);
+      break;
+   case 'z':
+      EyeDist -= 0.5;
+      if (EyeDist < 6.0)
+         EyeDist = 6.0;
+      break;
+   case 'Z':
+      EyeDist += 0.5;
+      if (EyeDist > 90.0)
+         EyeDist = 90;
+      break;
+   case 27:
+      exit(0);
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+specialkey(int key, int x, int y)
+{
+   GLfloat step = 2.0;
+   (void) x;
+   (void) y;
+   switch (key) {
+   case GLUT_KEY_UP:
+      Xrot += step;
+      break;
+   case GLUT_KEY_DOWN:
+      Xrot -= step;
+      break;
+   case GLUT_KEY_LEFT:
+      Yrot -= step;
+      break;
+   case GLUT_KEY_RIGHT:
+      Yrot += step;
+      break;
+   }
+   glutPostRedisplay();
+}
+
+
+/* new window size or exposure */
+static void
+Reshape(int width, int height)
+{
+   GLfloat ar = (float) width / (float) height;
+   glViewport(0, 0, (GLint)width, (GLint)height);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glFrustum(-2.0*ar, 2.0*ar, -2.0, 2.0, 4.0, 100.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+}
+
+
+static void
+InitCheckers(void)
+{
+#define CUBE_TEX_SIZE 64
+   GLubyte image[CUBE_TEX_SIZE][CUBE_TEX_SIZE][3];
+   static const GLubyte colors[6][3] = {
+      { 255,   0,   0 },	/* face 0 - red */
+      {   0, 255, 255 },	/* face 1 - cyan */
+      {   0, 255,   0 },	/* face 2 - green */
+      { 255,   0, 255 },	/* face 3 - purple */
+      {   0,   0, 255 },	/* face 4 - blue */
+      { 255, 255,   0 }		/* face 5 - yellow */
+   };
+   static const GLenum targets[6] = {
+      GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB,
+      GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB,
+      GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB,
+      GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB,
+      GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB,
+      GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
+   };
+
+   GLint i, j, f;
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+   /* make colored checkerboard cube faces */
+   for (f = 0; f < 6; f++) {
+      for (i = 0; i < CUBE_TEX_SIZE; i++) {
+         for (j = 0; j < CUBE_TEX_SIZE; j++) {
+            if ((i/4 + j/4) & 1) {
+               image[i][j][0] = colors[f][0];
+               image[i][j][1] = colors[f][1];
+               image[i][j][2] = colors[f][2];
+            }
+            else {
+               image[i][j][0] = 255;
+               image[i][j][1] = 255;
+               image[i][j][2] = 255;
+            }
+         }
+      }
+
+      glTexImage2D(targets[f], 0, GL_RGB, CUBE_TEX_SIZE, CUBE_TEX_SIZE, 0,
+                   GL_RGB, GL_UNSIGNED_BYTE, image);
+   }
+}
+
+
+static void
+LoadFace(GLenum target, const char *filename,
+         GLboolean flipTB, GLboolean flipLR)
+{
+   GLint w, h;
+   GLenum format;
+   GLubyte *img = LoadRGBImage(filename, &w, &h, &format);
+   if (!img) {
+      printf("Error: couldn't load texture image %s\n", filename);
+      exit(1);
+   }
+   assert(format == GL_RGB);
+
+   /* <sigh> the way the texture cube mapping works, we have to flip
+    * images to make things look right.
+    */
+   if (flipTB) {
+      const int stride = 3 * w;
+      GLubyte temp[3*1024];
+      int i;
+      for (i = 0; i < h / 2; i++) {
+         memcpy(temp, img + i * stride, stride);
+         memcpy(img + i * stride, img + (h - i - 1) * stride, stride);
+         memcpy(img + (h - i - 1) * stride, temp, stride);
+      }
+   }
+   if (flipLR) {
+      const int stride = 3 * w;
+      GLubyte temp[3];
+      GLubyte *row;
+      int i, j;
+      for (i = 0; i < h; i++) {
+         row = img + i * stride;
+         for (j = 0; j < w / 2; j++) {
+            int k = w - j - 1;
+            temp[0] = row[j*3+0];
+            temp[1] = row[j*3+1];
+            temp[2] = row[j*3+2];
+            row[j*3+0] = row[k*3+0];
+            row[j*3+1] = row[k*3+1];
+            row[j*3+2] = row[k*3+2];
+            row[k*3+0] = temp[0];
+            row[k*3+1] = temp[1];
+            row[k*3+2] = temp[2];
+         }
+      }
+   }
+
+   gluBuild2DMipmaps(target, GL_RGB, w, h, format, GL_UNSIGNED_BYTE, img);
+   free(img);
+}
+
+
+static void
+LoadEnvmaps(void)
+{
+   LoadFace(GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB, "right.rgb", GL_TRUE, GL_FALSE);
+   LoadFace(GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB, "left.rgb", GL_TRUE, GL_FALSE);
+   LoadFace(GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB, "top.rgb", GL_FALSE, GL_TRUE);
+   LoadFace(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB, "bottom.rgb", GL_FALSE, GL_TRUE);
+   LoadFace(GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB, "front.rgb", GL_TRUE, GL_FALSE);
+   LoadFace(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB, "back.rgb", GL_TRUE, GL_FALSE);
+}
+
+
+static void
+InitTextures(GLboolean useImageFiles)
+{
+   GLenum filter;
+
+   /*
+    * Env map
+    */
+   glActiveTexture(GL_TEXTURE0);
+   glBindTexture(GL_TEXTURE_CUBE_MAP, 1);
+   if (useImageFiles) {
+      LoadEnvmaps();
+      filter = GL_LINEAR;
+   }
+   else {
+      InitCheckers();
+      filter = GL_NEAREST;
+   }
+   glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MIN_FILTER, filter);
+   glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MAG_FILTER, filter);
+   glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+   glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+   /*
+    * Ground texture
+    */
+   {
+      GLint imgWidth, imgHeight;
+      GLenum imgFormat;
+      GLubyte *image = NULL;
+
+      image = LoadRGBImage(GroundImage, &imgWidth, &imgHeight, &imgFormat);
+      if (!image) {
+         printf("Couldn't read %s\n", GroundImage);
+         exit(0);
+      }
+
+      glActiveTexture(GL_TEXTURE1);
+      glBindTexture(GL_TEXTURE_2D, 2);
+      gluBuild2DMipmaps(GL_TEXTURE_2D, 3, imgWidth, imgHeight,
+                        imgFormat, GL_UNSIGNED_BYTE, image);
+      free(image);
+      
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+   }
+}
+
+
+static void
+LoadAndCompileShader(GLuint shader, const char *text)
+{
+   GLint stat;
+
+   glShaderSource_func(shader, 1, (const GLchar **) &text, NULL);
+
+   glCompileShader_func(shader);
+
+   glGetShaderiv_func(shader, GL_COMPILE_STATUS, &stat);
+   if (!stat) {
+      GLchar log[1000];
+      GLsizei len;
+      glGetShaderInfoLog_func(shader, 1000, &len, log);
+      fprintf(stderr, "%s: problem compiling shader: %s\n", Demo, log);
+      exit(1);
+   }
+   else {
+      printf("Shader compiled OK\n");
+   }
+}
+
+
+/**
+ * Read a shader from a file.
+ */
+static void
+ReadShader(GLuint shader, const char *filename)
+{
+   const int max = 100*1000;
+   int n;
+   char *buffer = (char*) malloc(max);
+   FILE *f = fopen(filename, "r");
+   if (!f) {
+      fprintf(stderr, "%s: Unable to open shader file %s\n", Demo, filename);
+      exit(1);
+   }
+
+   n = fread(buffer, 1, max, f);
+   printf("%s: read %d bytes from shader file %s\n", Demo, n, filename);
+   if (n > 0) {
+      buffer[n] = 0;
+      LoadAndCompileShader(shader, buffer);
+   }
+
+   fclose(f);
+   free(buffer);
+}
+
+
+static void
+CheckLink(GLuint prog)
+{
+   GLint stat;
+   glGetProgramiv_func(prog, GL_LINK_STATUS, &stat);
+   if (!stat) {
+      GLchar log[1000];
+      GLsizei len;
+      glGetProgramInfoLog_func(prog, 1000, &len, log);
+      fprintf(stderr, "Linker error:\n%s\n", log);
+   }
+   else {
+      fprintf(stderr, "Link success!\n");
+   }
+}
+
+
+static GLuint
+CreateProgram(const char *vertProgFile, const char *fragProgFile,
+              struct uniform_info *uniforms)
+{
+   GLuint fragShader = 0, vertShader = 0, program = 0;
+   GLint i;
+
+   program = glCreateProgram_func();
+   if (vertProgFile) {
+      vertShader = glCreateShader_func(GL_VERTEX_SHADER);
+      ReadShader(vertShader, vertProgFile);
+      glAttachShader_func(program, vertShader);
+   }
+
+   if (fragProgFile) {
+      fragShader = glCreateShader_func(GL_FRAGMENT_SHADER);
+      ReadShader(fragShader, fragProgFile);
+      glAttachShader_func(program, fragShader);
+   }
+
+   glLinkProgram_func(program);
+   CheckLink(program);
+
+   glUseProgram_func(program);
+
+   assert(glIsProgram_func(program));
+   assert(glIsShader_func(fragShader));
+   assert(glIsShader_func(vertShader));
+
+   CheckError(__LINE__);
+   for (i = 0; uniforms[i].name; i++) {
+      uniforms[i].location
+         = glGetUniformLocation_func(program, uniforms[i].name);
+      printf("Uniform %s location: %d\n", uniforms[i].name,
+             uniforms[i].location);
+
+      switch (uniforms[i].size) {
+      case 1:
+         if (uniforms[i].type == GL_INT)
+            glUniform1i_func(uniforms[i].location,
+                             (GLint) uniforms[i].value[0]);
+         else
+            glUniform1fv_func(uniforms[i].location, 1, uniforms[i].value);
+         break;
+      case 2:
+         glUniform2fv_func(uniforms[i].location, 1, uniforms[i].value);
+         break;
+      case 3:
+         glUniform3fv_func(uniforms[i].location, 1, uniforms[i].value);
+         break;
+      case 4:
+         glUniform4fv_func(uniforms[i].location, 1, uniforms[i].value);
+         break;
+      default:
+         abort();
+      }
+   }
+
+   CheckError(__LINE__);
+
+   return program;
+}
+
+
+static void
+InitPrograms(void)
+{
+   Program1 = CreateProgram(ReflectVertFile, CubeFragFile, ReflectUniforms);
+   Program2 = CreateProgram(SimpleVertFile, SimpleTexFragFile, SimpleUniforms);
+}
+
+
+static void
+Init(GLboolean useImageFiles)
+{
+   const char *version = (const char *) glGetString(GL_VERSION);
+
+   if (version[0] != '2' || version[1] != '.') {
+      printf("Warning: this program expects OpenGL 2.0\n");
+      /*exit(1);*/
+   }
+   printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
+
+   GetExtensionFuncs();
+
+   InitTextures(useImageFiles);
+   InitPrograms();
+
+   glEnable(GL_DEPTH_TEST);
+
+   glClearColor(.6, .6, .9, 0);
+   glColor3f(1.0, 1.0, 1.0);
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   glutInit(&argc, argv);
+   glutInitWindowSize(500, 400);
+   glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
+   glutCreateWindow(Demo);
+   glutReshapeFunc(Reshape);
+   glutKeyboardFunc(key);
+   glutSpecialFunc(specialkey);
+   glutDisplayFunc(draw);
+   if (Anim)
+      glutIdleFunc(idle);
+   if (argc > 1 && strcmp(argv[1] , "-i") == 0)
+      Init(1);
+   else
+      Init(0);
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/glsl/toyball.c b/progs/glsl/toyball.c
new file mode 100644
index 00000000000..cef52c04a6c
--- /dev/null
+++ b/progs/glsl/toyball.c
@@ -0,0 +1,339 @@
+/**
+ * "Toy Ball" shader demo.  Uses the example shaders from
+ * chapter 11 of the OpenGL Shading Language "orange" book.
+ * 16 Jan 2007
+ */
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/gl.h>
+#include <GL/glut.h>
+#include <GL/glext.h>
+#include "extfuncs.h"
+
+
+static char *FragProgFile = "CH11-toyball.frag.txt";
+static char *VertProgFile = "CH11-toyball.vert.txt";
+
+/* program/shader objects */
+static GLuint fragShader;
+static GLuint vertShader;
+static GLuint program;
+
+
+struct uniform_info {
+   const char *name;
+   GLuint size;
+   GLint location;
+   GLfloat value[4];
+};
+
+static struct uniform_info Uniforms[] = {
+   { "LightDir",       4, -1, { 0.57737, 0.57735, 0.57735, 0.0 } },
+   { "HVector",        4, -1, { 0.32506, 0.32506, 0.88808, 0.0 } },
+   { "BallCenter",     4, -1, { 0.0, 0.0, 0.0, 1.0 } },
+   { "SpecularColor",  4, -1, { 0.4, 0.4, 0.4, 60.0 } },
+   { "Red",            4, -1, { 0.6, 0.0, 0.0, 1.0 } },
+   { "Blue",           4, -1, { 0.0, 0.3, 0.6, 1.0 } },
+   { "Yellow",         4, -1, { 0.6, 0.5, 0.0, 1.0 } },
+   { "HalfSpace0",     4, -1, { 1.0, 0.0, 0.0, 0.2 } },
+   { "HalfSpace1",     4, -1, { 0.309016994, 0.951056516, 0.0, 0.2 } },
+   { "HalfSpace2",     4, -1, { -0.809016994, 0.587785252, 0.0, 0.2 } },
+   { "HalfSpace3",     4, -1, { -0.809016994, -0.587785252, 0.0, 0.2 } },
+   { "HalfSpace4",     4, -1, { 0.309116994, -0.951056516, 0.0, 0.2 } },
+   { "InOrOutInit",    1, -1, { -3.0, 0, 0, 0 } },
+   { "StripeWidth",    1, -1, {  0.3, 0, 0, 0 } },
+   { "FWidth",         1, -1, { 0.005, 0, 0, 0 } },
+   { NULL, 0, 0, { 0, 0, 0, 0 } }
+};
+
+static GLint win = 0;
+static GLboolean Anim = GL_FALSE;
+static GLfloat TexRot = 0.0;
+static GLfloat xRot = 0.0f, yRot = 0.0f, zRot = 0.0f;
+
+
+static void
+Idle(void)
+{
+   TexRot += 2.0;
+   if (TexRot > 360.0)
+      TexRot -= 360.0;
+   glutPostRedisplay();
+}
+
+
+static void
+Redisplay(void)
+{
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+   
+   glPushMatrix();
+   glRotatef(xRot, 1.0f, 0.0f, 0.0f);
+   glRotatef(yRot, 0.0f, 1.0f, 0.0f);
+   glRotatef(zRot, 0.0f, 0.0f, 1.0f);
+
+   glMatrixMode(GL_TEXTURE);
+   glLoadIdentity();
+   glRotatef(TexRot, 0.0f, 1.0f, 0.0f);
+   glMatrixMode(GL_MODELVIEW);
+
+   glutSolidSphere(2.0, 20, 10);
+
+   glPopMatrix();
+
+   glFinish();
+   glFlush();
+   glutSwapBuffers();
+}
+
+
+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, 5.0, 25.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef(0.0f, 0.0f, -15.0f);
+}
+
+
+static void
+CleanUp(void)
+{
+   glDeleteShader_func(fragShader);
+   glDeleteShader_func(vertShader);
+   glDeleteProgram_func(program);
+   glutDestroyWindow(win);
+}
+
+
+static void
+Key(unsigned char key, int x, int y)
+{
+   const GLfloat step = 2.0;
+  (void) x;
+  (void) y;
+
+   switch(key) {
+   case 'a':
+      Anim = !Anim;
+      if (Anim)
+         glutIdleFunc(Idle);
+      else
+         glutIdleFunc(NULL);
+      break;
+   case 'z':
+      zRot += step;
+      break;
+   case 'Z':
+      zRot -= step;
+      break;
+   case 27:
+      CleanUp();
+      exit(0);
+      break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+SpecialKey(int key, int x, int y)
+{
+   const GLfloat step = 2.0;
+
+  (void) x;
+  (void) y;
+
+   switch(key) {
+   case GLUT_KEY_UP:
+      xRot += step;
+      break;
+   case GLUT_KEY_DOWN:
+      xRot -= step;
+      break;
+   case GLUT_KEY_LEFT:
+      yRot -= step;
+      break;
+   case GLUT_KEY_RIGHT:
+      yRot += step;
+      break;
+   }
+   glutPostRedisplay();
+}
+
+
+
+static void
+LoadAndCompileShader(GLuint shader, const char *text)
+{
+   GLint stat;
+
+   glShaderSource_func(shader, 1, (const GLchar **) &text, NULL);
+
+   glCompileShader_func(shader);
+
+   glGetShaderiv_func(shader, GL_COMPILE_STATUS, &stat);
+   if (!stat) {
+      GLchar log[1000];
+      GLsizei len;
+      glGetShaderInfoLog_func(shader, 1000, &len, log);
+      fprintf(stderr, "brick: problem compiling shader: %s\n", log);
+      exit(1);
+   }
+   else {
+      printf("Shader compiled OK\n");
+   }
+}
+
+
+/**
+ * Read a shader from a file.
+ */
+static void
+ReadShader(GLuint shader, const char *filename)
+{
+   const int max = 100*1000;
+   int n;
+   char *buffer = (char*) malloc(max);
+   FILE *f = fopen(filename, "r");
+   if (!f) {
+      fprintf(stderr, "brick: Unable to open shader file %s\n", filename);
+      exit(1);
+   }
+
+   n = fread(buffer, 1, max, f);
+   printf("brick: read %d bytes from shader file %s\n", n, filename);
+   if (n > 0) {
+      buffer[n] = 0;
+      LoadAndCompileShader(shader, buffer);
+   }
+
+   fclose(f);
+   free(buffer);
+}
+
+
+static void
+CheckLink(GLuint prog)
+{
+   GLint stat;
+   glGetProgramiv_func(prog, GL_LINK_STATUS, &stat);
+   if (!stat) {
+      GLchar log[1000];
+      GLsizei len;
+      glGetProgramInfoLog_func(prog, 1000, &len, log);
+      fprintf(stderr, "Linker error:\n%s\n", log);
+   }
+   else {
+      fprintf(stderr, "Link success!\n");
+   }
+}
+
+
+static void
+Init(void)
+{
+   const char *version;
+   GLint i;
+
+   version = (const char *) glGetString(GL_VERSION);
+   if (version[0] != '2' || version[1] != '.') {
+      printf("Warning: this program expects OpenGL 2.0\n");
+      /*exit(1);*/
+   }
+   printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
+
+   GetExtensionFuncs();
+
+   vertShader = glCreateShader_func(GL_VERTEX_SHADER);
+   ReadShader(vertShader, VertProgFile);
+
+   fragShader = glCreateShader_func(GL_FRAGMENT_SHADER);
+   ReadShader(fragShader, FragProgFile);
+
+   program = glCreateProgram_func();
+   glAttachShader_func(program, fragShader);
+   glAttachShader_func(program, vertShader);
+   glLinkProgram_func(program);
+   CheckLink(program);
+   glUseProgram_func(program);
+
+   assert(glIsProgram_func(program));
+   assert(glIsShader_func(fragShader));
+   assert(glIsShader_func(vertShader));
+
+
+   for (i = 0; Uniforms[i].name; i++) {
+      Uniforms[i].location
+         = glGetUniformLocation_func(program, Uniforms[i].name);
+      printf("Uniform %s location: %d\n", Uniforms[i].name,
+             Uniforms[i].location);
+      switch (Uniforms[i].size) {
+      case 1:
+         glUniform1fv_func(Uniforms[i].location, 1, Uniforms[i].value);
+         break;
+      case 2:
+         glUniform2fv_func(Uniforms[i].location, 1, Uniforms[i].value);
+         break;
+      case 3:
+         glUniform3fv_func(Uniforms[i].location, 1, Uniforms[i].value);
+         break;
+      case 4:
+         glUniform4fv_func(Uniforms[i].location, 1, Uniforms[i].value);
+         break;
+      default:
+         abort();
+      }
+   }
+
+   assert(glGetError() == 0);
+
+   glClearColor(0.4f, 0.4f, 0.8f, 0.0f);
+
+   glEnable(GL_DEPTH_TEST);
+
+   glColor3f(1, 0, 0);
+}
+
+
+static void
+ParseOptions(int argc, char *argv[])
+{
+   int i;
+   for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "-fs") == 0) {
+         FragProgFile = argv[i+1];
+      }
+      else if (strcmp(argv[i], "-vs") == 0) {
+         VertProgFile = argv[i+1];
+      }
+   }
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   glutInit(&argc, argv);
+   glutInitWindowPosition( 0, 0);
+   glutInitWindowSize(400, 400);
+   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
+   win = glutCreateWindow(argv[0]);
+   glutReshapeFunc(Reshape);
+   glutKeyboardFunc(Key);
+   glutSpecialFunc(SpecialKey);
+   glutDisplayFunc(Redisplay);
+   ParseOptions(argc, argv);
+   Init();
+   glutMainLoop();
+   return 0;
+}
+
diff --git a/progs/redbook/.cvsignore b/progs/redbook/.gitignore
index 8ed3efe3e23..8ed3efe3e23 100644
--- a/progs/redbook/.cvsignore
+++ b/progs/redbook/.gitignore
diff --git a/progs/samples/.cvsignore b/progs/samples/.gitignore
index 12b0650567b..12b0650567b 100644
--- a/progs/samples/.cvsignore
+++ b/progs/samples/.gitignore
diff --git a/progs/util/extfuncs.h b/progs/util/extfuncs.h
new file mode 100644
index 00000000000..90302bb5107
--- /dev/null
+++ b/progs/util/extfuncs.h
@@ -0,0 +1,136 @@
+/**
+ * Utility for getting OpenGL extension function pointers
+ * Meant to be #included.
+ */
+
+/* OpenGL 2.0 */
+static PFNGLATTACHSHADERPROC glAttachShader_func = NULL;
+static PFNGLBINDATTRIBLOCATIONPROC glBindAttribLocation_func = NULL;
+static PFNGLCOMPILESHADERPROC glCompileShader_func = NULL;
+static PFNGLCREATEPROGRAMPROC glCreateProgram_func = NULL;
+static PFNGLCREATESHADERPROC glCreateShader_func = NULL;
+static PFNGLDELETEPROGRAMPROC glDeleteProgram_func = NULL;
+static PFNGLDELETESHADERPROC glDeleteShader_func = NULL;
+static PFNGLGETATTACHEDSHADERSPROC glGetAttachedShaders_func = NULL;
+static PFNGLGETATTRIBLOCATIONPROC glGetAttribLocation_func = NULL;
+static PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog_func = NULL;
+static PFNGLGETSHADERINFOLOGPROC glGetShaderInfoLog_func = NULL;
+static PFNGLGETSHADERIVPROC glGetShaderiv_func = NULL;
+static PFNGLGETPROGRAMIVPROC glGetProgramiv_func = NULL;
+static PFNGLGETSHADERSOURCEPROC glGetShaderSource_func = NULL;
+static PFNGLGETUNIFORMFVPROC glGetUniformfv_func = NULL;
+static PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation_func = NULL;
+static PFNGLISPROGRAMPROC glIsProgram_func = NULL;
+static PFNGLISSHADERPROC glIsShader_func = NULL;
+static PFNGLLINKPROGRAMPROC glLinkProgram_func = NULL;
+static PFNGLSHADERSOURCEPROC glShaderSource_func = NULL;
+static PFNGLUNIFORM1IPROC glUniform1i_func = NULL;
+static PFNGLUNIFORM1FVPROC glUniform1fv_func = NULL;
+static PFNGLUNIFORM2FVPROC glUniform2fv_func = NULL;
+static PFNGLUNIFORM3FVPROC glUniform3fv_func = NULL;
+static PFNGLUNIFORM4FVPROC glUniform4fv_func = NULL;
+static PFNGLUNIFORMMATRIX2FVPROC glUniformMatrix2fv_func = NULL;
+static PFNGLUNIFORMMATRIX3FVPROC glUniformMatrix3fv_func = NULL;
+static PFNGLUNIFORMMATRIX4FVPROC glUniformMatrix4fv_func = NULL;
+static PFNGLUSEPROGRAMPROC glUseProgram_func = NULL;
+static PFNGLVERTEXATTRIB1FPROC glVertexAttrib1f_func = NULL;
+static PFNGLVERTEXATTRIB2FPROC glVertexAttrib2f_func = NULL;
+static PFNGLVERTEXATTRIB3FPROC glVertexAttrib3f_func = NULL;
+static PFNGLVERTEXATTRIB4FPROC glVertexAttrib4f_func = NULL;
+
+/* OpenGL 2.1 */
+static PFNGLUNIFORMMATRIX2X3FVPROC glUniformMatrix2x3fv_func = NULL;
+static PFNGLUNIFORMMATRIX3X2FVPROC glUniformMatrix3x2fv_func = NULL;
+static PFNGLUNIFORMMATRIX2X4FVPROC glUniformMatrix2x4fv_func = NULL;
+static PFNGLUNIFORMMATRIX4X2FVPROC glUniformMatrix4x2fv_func = NULL;
+static PFNGLUNIFORMMATRIX3X4FVPROC glUniformMatrix3x4fv_func = NULL;
+static PFNGLUNIFORMMATRIX4X3FVPROC glUniformMatrix4x3fv_func = NULL;
+
+/* GL_ARB_vertex/fragment_program */
+static PFNGLBINDPROGRAMARBPROC glBindProgramARB_func = NULL;
+static PFNGLDELETEPROGRAMSARBPROC glDeleteProgramsARB_func = NULL;
+static PFNGLGENPROGRAMSARBPROC glGenProgramsARB_func = NULL;
+static PFNGLGETPROGRAMLOCALPARAMETERDVARBPROC glGetProgramLocalParameterdvARB_func = NULL;
+static PFNGLISPROGRAMARBPROC glIsProgramARB_func = NULL;
+static PFNGLPROGRAMLOCALPARAMETER4DARBPROC glProgramLocalParameter4dARB_func = NULL;
+static PFNGLPROGRAMLOCALPARAMETER4FVARBPROC glProgramLocalParameter4fvARB_func = NULL;
+static PFNGLPROGRAMSTRINGARBPROC glProgramStringARB_func = NULL;
+static PFNGLVERTEXATTRIB1FARBPROC glVertexAttrib1fARB_func = NULL;
+
+/* GL_APPLE_vertex_array_object */
+static PFNGLBINDVERTEXARRAYAPPLEPROC glBindVertexArrayAPPLE_func = NULL;
+static PFNGLDELETEVERTEXARRAYSAPPLEPROC glDeleteVertexArraysAPPLE_func = NULL;
+static PFNGLGENVERTEXARRAYSAPPLEPROC glGenVertexArraysAPPLE_func = NULL;
+static PFNGLISVERTEXARRAYAPPLEPROC glIsVertexArrayAPPLE_func = NULL;
+
+/* GL_EXT_stencil_two_side */
+static PFNGLACTIVESTENCILFACEEXTPROC glActiveStencilFaceEXT_func = NULL;
+
+
+static void
+GetExtensionFuncs(void)
+{
+   /* OpenGL 2.0 */
+   glAttachShader_func = (PFNGLATTACHSHADERPROC) glutGetProcAddress("glAttachShader");
+   glBindAttribLocation_func = (PFNGLBINDATTRIBLOCATIONPROC) glutGetProcAddress("glBindAttribLocation");
+   glCompileShader_func = (PFNGLCOMPILESHADERPROC) glutGetProcAddress("glCompileShader");
+   glCreateProgram_func = (PFNGLCREATEPROGRAMPROC) glutGetProcAddress("glCreateProgram");
+   glCreateShader_func = (PFNGLCREATESHADERPROC) glutGetProcAddress("glCreateShader");
+   glDeleteProgram_func = (PFNGLDELETEPROGRAMPROC) glutGetProcAddress("glDeleteProgram");
+   glDeleteShader_func = (PFNGLDELETESHADERPROC) glutGetProcAddress("glDeleteShader");
+   glGetAttachedShaders_func = (PFNGLGETATTACHEDSHADERSPROC) glutGetProcAddress("glGetAttachedShaders");
+   glGetAttribLocation_func = (PFNGLGETATTRIBLOCATIONPROC) glutGetProcAddress("glGetAttribLocation");
+   glGetProgramInfoLog_func = (PFNGLGETPROGRAMINFOLOGPROC) glutGetProcAddress("glGetProgramInfoLog");
+   glGetShaderInfoLog_func = (PFNGLGETSHADERINFOLOGPROC) glutGetProcAddress("glGetShaderInfoLog");
+   glGetProgramiv_func = (PFNGLGETPROGRAMIVPROC) glutGetProcAddress("glGetProgramiv");
+   glGetShaderiv_func = (PFNGLGETSHADERIVPROC) glutGetProcAddress("glGetShaderiv");
+   glGetShaderSource_func = (PFNGLGETSHADERSOURCEPROC) glutGetProcAddress("glGetShaderSource");
+   glGetUniformLocation_func = (PFNGLGETUNIFORMLOCATIONPROC) glutGetProcAddress("glGetUniformLocation");
+   glGetUniformfv_func = (PFNGLGETUNIFORMFVPROC) glutGetProcAddress("glGetUniformfv");
+   glIsProgram_func = (PFNGLISPROGRAMPROC) glutGetProcAddress("glIsProgram");
+   glIsShader_func = (PFNGLISSHADERPROC) glutGetProcAddress("glIsShader");
+   glLinkProgram_func = (PFNGLLINKPROGRAMPROC) glutGetProcAddress("glLinkProgram");
+   glShaderSource_func = (PFNGLSHADERSOURCEPROC) glutGetProcAddress("glShaderSource");
+   glUniform1i_func = (PFNGLUNIFORM1IPROC) glutGetProcAddress("glUniform1i");
+   glUniform1fv_func = (PFNGLUNIFORM1FVPROC) glutGetProcAddress("glUniform1fv");
+   glUniform2fv_func = (PFNGLUNIFORM2FVPROC) glutGetProcAddress("glUniform2fv");
+   glUniform3fv_func = (PFNGLUNIFORM3FVPROC) glutGetProcAddress("glUniform3fv");
+   glUniform4fv_func = (PFNGLUNIFORM3FVPROC) glutGetProcAddress("glUniform4fv");
+   glUniformMatrix2fv_func = (PFNGLUNIFORMMATRIX2FVPROC) glutGetProcAddress("glUniformMatrix2fv");
+   glUniformMatrix3fv_func = (PFNGLUNIFORMMATRIX3FVPROC) glutGetProcAddress("glUniformMatrix3fv");
+   glUniformMatrix4fv_func = (PFNGLUNIFORMMATRIX4FVPROC) glutGetProcAddress("glUniformMatrix4fv");
+   glUseProgram_func = (PFNGLUSEPROGRAMPROC) glutGetProcAddress("glUseProgram");
+   glVertexAttrib1f_func = (PFNGLVERTEXATTRIB1FPROC) glutGetProcAddress("glVertexAttrib1f");
+   glVertexAttrib2f_func = (PFNGLVERTEXATTRIB2FPROC) glutGetProcAddress("glVertexAttrib2f");
+   glVertexAttrib3f_func = (PFNGLVERTEXATTRIB3FPROC) glutGetProcAddress("glVertexAttrib3f");
+   glVertexAttrib4f_func = (PFNGLVERTEXATTRIB4FPROC) glutGetProcAddress("glVertexAttrib4f");
+
+   /* OpenGL 2.1 */
+   glUniformMatrix2x3fv_func = (PFNGLUNIFORMMATRIX2X3FVPROC) glutGetProcAddress("glUniformMatrix2x3fv");
+   glUniformMatrix3x2fv_func = (PFNGLUNIFORMMATRIX3X2FVPROC) glutGetProcAddress("glUniformMatrix3x2fv");
+   glUniformMatrix2x4fv_func = (PFNGLUNIFORMMATRIX2X4FVPROC) glutGetProcAddress("glUniformMatrix2x4fv");
+   glUniformMatrix4x2fv_func = (PFNGLUNIFORMMATRIX4X2FVPROC) glutGetProcAddress("glUniformMatrix4x2fv");
+   glUniformMatrix3x4fv_func = (PFNGLUNIFORMMATRIX3X4FVPROC) glutGetProcAddress("glUniformMatrix3x4fv");
+   glUniformMatrix4x3fv_func = (PFNGLUNIFORMMATRIX4X3FVPROC) glutGetProcAddress("glUniformMatrix4x3fv");
+
+   /* GL_ARB_vertex/fragment_program */
+   glBindProgramARB_func = (PFNGLBINDPROGRAMARBPROC) glutGetProcAddress("glBindProgramARB");
+   glDeleteProgramsARB_func = (PFNGLDELETEPROGRAMSARBPROC) glutGetProcAddress("glDeleteProgramsARB");
+   glGenProgramsARB_func = (PFNGLGENPROGRAMSARBPROC) glutGetProcAddress("glGenProgramsARB");
+   glGetProgramLocalParameterdvARB_func = (PFNGLGETPROGRAMLOCALPARAMETERDVARBPROC) glutGetProcAddress("glGetProgramLocalParameterdvARB");
+   glIsProgramARB_func = (PFNGLISPROGRAMARBPROC) glutGetProcAddress("glIsProgramARB");
+   glProgramLocalParameter4dARB_func = (PFNGLPROGRAMLOCALPARAMETER4DARBPROC) glutGetProcAddress("glProgramLocalParameter4dARB");
+   glProgramLocalParameter4fvARB_func = (PFNGLPROGRAMLOCALPARAMETER4FVARBPROC) glutGetProcAddress("glProgramLocalParameter4fvARB");
+   glProgramStringARB_func = (PFNGLPROGRAMSTRINGARBPROC) glutGetProcAddress("glProgramStringARB");
+   glVertexAttrib1fARB_func = (PFNGLVERTEXATTRIB1FARBPROC) glutGetProcAddress("glVertexAttrib1fARB");
+
+   /* GL_APPLE_vertex_array_object */
+   glBindVertexArrayAPPLE_func = (PFNGLBINDVERTEXARRAYAPPLEPROC) glutGetProcAddress("glBindVertexArrayAPPLE");
+   glDeleteVertexArraysAPPLE_func = (PFNGLDELETEVERTEXARRAYSAPPLEPROC) glutGetProcAddress("glDeleteVertexArraysAPPLE");
+   glGenVertexArraysAPPLE_func = (PFNGLGENVERTEXARRAYSAPPLEPROC) glutGetProcAddress("glGenVertexArraysAPPLE");
+   glIsVertexArrayAPPLE_func = (PFNGLISVERTEXARRAYAPPLEPROC) glutGetProcAddress("glIsVertexArrayAPPLE");
+
+   /* GL_EXT_stencil_two_side */
+   glActiveStencilFaceEXT_func = (PFNGLACTIVESTENCILFACEEXTPROC) glutGetProcAddress("glActiveStencilFaceEXT");
+}
+
diff --git a/progs/xdemos/.cvsignore b/progs/xdemos/.gitignore
index 4adffda2d1e..4adffda2d1e 100644
--- a/progs/xdemos/.cvsignore
+++ b/progs/xdemos/.gitignore
diff --git a/progs/xdemos/Makefile b/progs/xdemos/Makefile
index 4ca8b107a24..ec85464bec0 100644
--- a/progs/xdemos/Makefile
+++ b/progs/xdemos/Makefile
@@ -24,11 +24,11 @@ PROGS = glthreads \
 	pbinfo \
 	pbdemo \
 	wincopy \
-	xdemo \
 	xfont \
 	xrotfontdemo \
 	yuvrect_client
 
+# omit this XMesa API demo:	xdemo
 
 
 ##### RULES #####
diff --git a/progs/xdemos/glthreads.c b/progs/xdemos/glthreads.c
index 83413383dd4..989697fbcaa 100644
--- a/progs/xdemos/glthreads.c
+++ b/progs/xdemos/glthreads.c
@@ -473,7 +473,7 @@ main(int argc, char *argv[])
 
       dpy = XOpenDisplay(displayName);
       if (!dpy) {
-         fprintf(stderr, "Unable to open display %s\n", displayName);
+         fprintf(stderr, "Unable to open display %s\n", XDisplayName(displayName));
          return -1;
       }
    }
diff --git a/progs/xdemos/glxcontexts.c b/progs/xdemos/glxcontexts.c
index fbc296ef625..a9ff326ed5e 100644
--- a/progs/xdemos/glxcontexts.c
+++ b/progs/xdemos/glxcontexts.c
@@ -587,8 +587,8 @@ main(int argc, char *argv[])
 
    dpy = XOpenDisplay(dpyName);
    if (!dpy) {
-      printf("Error: couldn't open display %s\n",
-	     dpyName ? dpyName : getenv("DISPLAY"));
+      fprintf(stderr, "Error: couldn't open display %s\n",
+	      XDisplayName(dpyName));
       return -1;
    }
 
diff --git a/progs/xdemos/glxgears_fbconfig.c b/progs/xdemos/glxgears_fbconfig.c
index acbadd21ac5..2dac00b75d1 100644
--- a/progs/xdemos/glxgears_fbconfig.c
+++ b/progs/xdemos/glxgears_fbconfig.c
@@ -575,7 +575,7 @@ main(int argc, char *argv[])
 
    dpy = XOpenDisplay(dpyName);
    if (!dpy) {
-      printf("Error: couldn't open display %s\n", dpyName);
+      printf("Error: couldn't open display %s\n", XDisplayName(dpyName));
       return -1;
    }
 
diff --git a/progs/xdemos/glxheads.c b/progs/xdemos/glxheads.c
index 0145a70e91c..b3290e90d51 100644
--- a/progs/xdemos/glxheads.c
+++ b/progs/xdemos/glxheads.c
@@ -57,7 +57,7 @@ static int NumHeads = 0;
 static void
 Error(const char *display, const char *msg)
 {
-   fprintf(stderr, "Error on display %s - %s\n", display, msg);
+   fprintf(stderr, "Error on display %s - %s\n", XDisplayName(display), msg);
    exit(1);
 }
 
diff --git a/progs/xdemos/glxinfo.c b/progs/xdemos/glxinfo.c
index fdd1c0523f6..3e8e0be5203 100644
--- a/progs/xdemos/glxinfo.c
+++ b/progs/xdemos/glxinfo.c
@@ -456,7 +456,19 @@ print_screen_info(Display *dpy, int scrnum, Bool allowDirect, GLboolean limits)
       }
       printf("display: %s  screen: %d\n", displayName, scrnum);
       free(displayName);
-      printf("direct rendering: %s\n", glXIsDirect(dpy, ctx) ? "Yes" : "No");
+      printf("direct rendering: ");
+      if (glXIsDirect(dpy, ctx)) {
+         printf("Yes\n");
+      } else {
+         if (!allowDirect) {
+            printf("No (-i specified)\n");
+         } else if (getenv("LIBGL_ALWAYS_INDIRECT")) {
+            printf("No (LIBGL_ALWAYS_INDIRECT set)\n");
+         } else {
+            printf("No (If you want to find out why, try setting "
+                   "LIBGL_DEBUG=verbose)\n");
+         }
+      }
       printf("server glx vendor string: %s\n", serverVendor);
       printf("server glx version string: %s\n", serverVersion);
       printf("server glx extensions:\n");
@@ -927,7 +939,7 @@ main(int argc, char *argv[])
 
    dpy = XOpenDisplay(displayName);
    if (!dpy) {
-      fprintf(stderr, "Error: unable to open display %s\n", displayName);
+      fprintf(stderr, "Error: unable to open display %s\n", XDisplayName(displayName));
       return -1;
    }
 
diff --git a/progs/xdemos/glxswapcontrol.c b/progs/xdemos/glxswapcontrol.c
index 0ed5ebe4722..d9be984be57 100644
--- a/progs/xdemos/glxswapcontrol.c
+++ b/progs/xdemos/glxswapcontrol.c
@@ -749,7 +749,7 @@ main(int argc, char *argv[])
 
    dpy = XOpenDisplay(dpyName);
    if (!dpy) {
-      printf("Error: couldn't open display %s\n", dpyName);
+      printf("Error: couldn't open display %s\n", XDisplayName(dpyName));
       return -1;
    }
 
diff --git a/progs/xdemos/manywin.c b/progs/xdemos/manywin.c
index c9cca751341..cfea555210a 100644
--- a/progs/xdemos/manywin.c
+++ b/progs/xdemos/manywin.c
@@ -59,7 +59,7 @@ static GLuint TexObj = 0;
 static void
 Error(const char *display, const char *msg)
 {
-   fprintf(stderr, "Error on display %s - %s\n", display, msg);
+   fprintf(stderr, "Error on display %s - %s\n", XDisplayName(display), msg);
    exit(1);
 }
 
diff --git a/progs/xdemos/opencloseopen.c b/progs/xdemos/opencloseopen.c
index 2e4de24c71d..0b8d0618431 100644
--- a/progs/xdemos/opencloseopen.c
+++ b/progs/xdemos/opencloseopen.c
@@ -91,7 +91,7 @@ make_window( const char * dpyName, const char *name,
 
    dpy = XOpenDisplay(dpyName);
    if (!dpy) {
-      printf("Error: couldn't open display %s\n", dpyName);
+      printf("Error: couldn't open display %s\n", XDisplayName(dpyName));
       exit(1);
    }
 
diff --git a/progs/xdemos/pbinfo.c b/progs/xdemos/pbinfo.c
index 88d93c8da62..b43adf1bb70 100644
--- a/progs/xdemos/pbinfo.c
+++ b/progs/xdemos/pbinfo.c
@@ -95,7 +95,7 @@ main(int argc, char *argv[])
    dpy = XOpenDisplay(dpyName);
 
    if (!dpy) {
-      printf("Error: couldn't open display %s\n", dpyName ? dpyName : ":0");
+      printf("Error: couldn't open display %s\n", XDisplayName(dpyName));
       return 1;
    }
 
diff --git a/progs/xdemos/yuvrect_client.c b/progs/xdemos/yuvrect_client.c
index 48f82cb7599..e2b79a7c0e1 100644
--- a/progs/xdemos/yuvrect_client.c
+++ b/progs/xdemos/yuvrect_client.c
@@ -296,7 +296,7 @@ main(int argc, char *argv[])
    dpy = XOpenDisplay(dpyName);
    if (!dpy) {
       printf("Error: couldn't open display %s\n",
-	     dpyName ? dpyName : getenv("DISPLAY"));
+	     XDisplayName(dpyName));
       return -1;
    }