progs/es: OpenGL ES 1.x and 2.X demo programs.

The demo programs are written by Brian Paul, and cherry-picked from
opengl-es branch.  Several minor issues such as a linking problem are
fixed.

Signed-off-by: Chia-I Wu <[email protected]>

1 files changed, 433 insertions, 0 deletions

diff --git a/progs/es1/xegl/two_win.c b/progs/es1/xegl/two_win.c
new file mode 100644
index 00000000000..4785e5304d3
--- /dev/null
+++ b/progs/es1/xegl/two_win.c
@@ -0,0 +1,433 @@
+/*
+ * Copyright (C) 2008  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.
+ */
+
+/*
+ * Test drawing to two windows.
+ * Brian Paul
+ * August 2008
+ */
+
+
+#include <assert.h>
+#include <math.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <X11/keysym.h>
+#include <GLES/gl.h>
+#include <GLES/glext.h>
+#include <EGL/egl.h>
+
+
+static int WinWidth[2] = {150, 300}, WinHeight[2] = {150, 300};
+
+
+static GLfloat view_rotx = 0.0, view_roty = 0.0, view_rotz = 0.0;
+
+
+/* new window size or exposure */
+static void
+reshape(int width, int height)
+{
+   GLfloat ar = (GLfloat) width / (GLfloat) height;
+
+   glViewport(0, 0, (GLint) width, (GLint) height);
+
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+#ifdef GL_VERSION_ES_CM_1_0
+   glFrustumf(-ar, ar, -1, 1, 5.0, 60.0);
+#else
+   glFrustum(-ar, ar, -1, 1, 5.0, 60.0);
+#endif
+   
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef(0.0, 0.0, -10.0);
+}
+
+
+static void
+draw(int win)
+{
+   static const GLfloat verts[3][2] = {
+      { -1, -1 },
+      {  1, -1 },
+      {  0,  1 }
+   };
+   static const GLfloat colors[3][4] = {
+      { 1, 0, 0, 1 },
+      { 0, 1, 0, 1 },
+      { 0, 0, 1, 1 }
+   };
+
+   assert(win == 0 || win == 1);
+
+   reshape(WinWidth[win], WinHeight[win]);
+
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   glPushMatrix();
+   glRotatef(view_rotx, 1, 0, 0);
+   glRotatef(view_roty, 0, 1, 0);
+   glRotatef(view_rotz, 0, 0, 1);
+
+   /* draw triangle */
+   {
+      glVertexPointer(2, GL_FLOAT, 0, verts);
+      glColorPointer(4, GL_FLOAT, 0, colors);
+
+      glEnableClientState(GL_VERTEX_ARRAY);
+      glEnableClientState(GL_COLOR_ARRAY);
+
+      glDrawArrays(GL_TRIANGLES, 0, 3);
+
+      glDisableClientState(GL_VERTEX_ARRAY);
+      glDisableClientState(GL_COLOR_ARRAY);
+   }
+
+   glPopMatrix();
+}
+
+
+static void
+init(void)
+{
+   glClearColor(0.4, 0.4, 0.4, 0.0);
+}
+
+
+/*
+ * Create an RGB, double-buffered X window.
+ * Return the window and context handles.
+ */
+static void
+make_x_window(Display *x_dpy, EGLDisplay egl_dpy,
+              const char *name,
+              int x, int y, int width, int height,
+              Window *winRet,
+              EGLContext *ctxRet,
+              EGLSurface *surfRet)
+{
+   static const EGLint attribs[] = {
+      EGL_RED_SIZE, 1,
+      EGL_GREEN_SIZE, 1,
+      EGL_BLUE_SIZE, 1,
+      EGL_DEPTH_SIZE, 1,
+      EGL_NONE
+   };
+
+   int scrnum;
+   XSetWindowAttributes attr;
+   unsigned long mask;
+   Window root;
+   Window win;
+   XVisualInfo *visInfo, visTemplate;
+   int num_visuals;
+   EGLContext ctx;
+   EGLConfig config;
+   EGLint num_configs;
+   EGLint vid;
+
+   scrnum = DefaultScreen( x_dpy );
+   root = RootWindow( x_dpy, scrnum );
+
+   if (!eglChooseConfig( egl_dpy, attribs, &config, 1, &num_configs)) {
+      printf("Error: couldn't get an EGL visual config\n");
+      exit(1);
+   }
+
+   assert(config);
+   assert(num_configs > 0);
+
+   if (!eglGetConfigAttrib(egl_dpy, config, EGL_NATIVE_VISUAL_ID, &vid)) {
+      printf("Error: eglGetConfigAttrib() failed\n");
+      exit(1);
+   }
+
+   /* The X window visual must match the EGL config */
+   visTemplate.visualid = vid;
+   visInfo = XGetVisualInfo(x_dpy, VisualIDMask, &visTemplate, &num_visuals);
+   if (!visInfo) {
+      printf("Error: couldn't get X visual\n");
+      exit(1);
+   }
+
+   /* window attributes */
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   attr.colormap = XCreateColormap( x_dpy, root, visInfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+
+   win = XCreateWindow( x_dpy, root, x, y, width, height,
+		        0, visInfo->depth, InputOutput,
+		        visInfo->visual, mask, &attr );
+
+   /* set hints and properties */
+   {
+      XSizeHints sizehints;
+      sizehints.x = x;
+      sizehints.y = y;
+      sizehints.width  = width;
+      sizehints.height = height;
+      sizehints.flags = USSize | USPosition;
+      XSetNormalHints(x_dpy, win, &sizehints);
+      XSetStandardProperties(x_dpy, win, name, name,
+                              None, (char **)NULL, 0, &sizehints);
+   }
+
+#if USE_FULL_GL
+   eglBindAPI(EGL_OPENGL_API);
+#else
+   eglBindAPI(EGL_OPENGL_ES_API);
+#endif
+
+   if (ctxRet) {
+      ctx = eglCreateContext(egl_dpy, config, EGL_NO_CONTEXT, NULL );
+      if (!ctx) {
+         printf("Error: eglCreateContext failed\n");
+         exit(1);
+      }
+      *ctxRet = ctx;
+   }
+
+   *surfRet = eglCreateWindowSurface(egl_dpy, config, win, NULL);
+
+   if (!*surfRet) {
+      printf("Error: eglCreateWindowSurface failed\n");
+      exit(1);
+   }
+
+   XFree(visInfo);
+
+   *winRet = win;
+}
+
+
+static void
+event_loop(Display *dpy, Window win1, Window win2,
+           EGLDisplay egl_dpy, EGLSurface egl_surf1, EGLSurface egl_surf2,
+           EGLContext egl_ctx)
+{
+   while (1) {
+      int redraw = 0;
+      int win;
+      XEvent event;
+
+      XNextEvent(dpy, &event);
+
+      switch (event.type) {
+      case Expose:
+         redraw = 1;
+         break;
+      case ConfigureNotify:
+         if (event.xconfigure.window == win1)
+            win = 0;
+         else
+            win = 1;
+         WinWidth[win] = event.xconfigure.width;
+         WinHeight[win] = event.xconfigure.height;
+         break;
+      case KeyPress:
+         {
+            char buffer[10];
+            int r, code;
+            code = XLookupKeysym(&event.xkey, 0);
+            if (code == XK_Left) {
+               view_roty += 5.0;
+            }
+            else if (code == XK_Right) {
+               view_roty -= 5.0;
+            }
+            else if (code == XK_Up) {
+               view_rotx += 5.0;
+            }
+            else if (code == XK_Down) {
+               view_rotx -= 5.0;
+            }
+            else {
+               r = XLookupString(&event.xkey, buffer, sizeof(buffer),
+                                 NULL, NULL);
+               if (buffer[0] == 27) {
+                  /* escape */
+                  return;
+               }
+            }
+         }
+         redraw = 1;
+         break;
+      default:
+         ; /*no-op*/
+      }
+
+      if (redraw) {
+         /* win 1 */
+         if (!eglMakeCurrent(egl_dpy, egl_surf1, egl_surf1, egl_ctx)) {
+            printf("Error: eglMakeCurrent(1) failed\n");
+            return;
+         }
+         draw(0);
+         eglSwapBuffers(egl_dpy, egl_surf1);
+
+         /* win 2 */
+         if (!eglMakeCurrent(egl_dpy, egl_surf2, egl_surf2, egl_ctx)) {
+            printf("Error: eglMakeCurrent(2) failed\n");
+            return;
+         }
+         draw(1);
+         eglSwapBuffers(egl_dpy, egl_surf2);
+      }
+   }
+}
+
+
+static void
+usage(void)
+{
+   printf("Usage:\n");
+   printf("  -display <displayname>  set the display to run on\n");
+   printf("  -info                   display OpenGL renderer info\n");
+}
+ 
+
+int
+main(int argc, char *argv[])
+{
+   Display *x_dpy;
+   Window win1, win2;
+   EGLSurface egl_surf1, egl_surf2;
+   EGLContext egl_ctx;
+   EGLDisplay egl_dpy;
+   char *dpyName = NULL;
+   GLboolean printInfo = GL_FALSE;
+   EGLint egl_major, egl_minor;
+   int i;
+   const char *s;
+
+   static struct {
+      char *name;
+      GLenum value;
+      enum {GetString, GetInteger} type;
+   } info_items[] = {
+      {"GL_RENDERER", GL_RENDERER, GetString},
+      {"GL_VERSION", GL_VERSION, GetString},
+      {"GL_VENDOR", GL_VENDOR, GetString},
+      {"GL_EXTENSIONS", GL_EXTENSIONS, GetString},
+      {"GL_MAX_PALETTE_MATRICES_OES", GL_MAX_PALETTE_MATRICES_OES, GetInteger},
+      {"GL_MAX_VERTEX_UNITS_OES", GL_MAX_VERTEX_UNITS_OES, GetInteger},
+   };
+
+   for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "-display") == 0) {
+         dpyName = argv[i+1];
+         i++;
+      }
+      else if (strcmp(argv[i], "-info") == 0) {
+         printInfo = GL_TRUE;
+      }
+      else {
+         usage();
+         return -1;
+      }
+   }
+
+   x_dpy = XOpenDisplay(dpyName);
+   if (!x_dpy) {
+      printf("Error: couldn't open display %s\n",
+	     dpyName ? dpyName : getenv("DISPLAY"));
+      return -1;
+   }
+
+   egl_dpy = eglGetDisplay(x_dpy);
+   if (!egl_dpy) {
+      printf("Error: eglGetDisplay() failed\n");
+      return -1;
+   }
+
+   if (!eglInitialize(egl_dpy, &egl_major, &egl_minor)) {
+      printf("Error: eglInitialize() failed\n");
+      return -1;
+   }
+
+   s = eglQueryString(egl_dpy, EGL_VERSION);
+   printf("EGL_VERSION = %s\n", s);
+
+   s = eglQueryString(egl_dpy, EGL_VENDOR);
+   printf("EGL_VENDOR = %s\n", s);
+
+   s = eglQueryString(egl_dpy, EGL_EXTENSIONS);
+   printf("EGL_EXTENSIONS = %s\n", s);
+
+   s = eglQueryString(egl_dpy, EGL_CLIENT_APIS);
+   printf("EGL_CLIENT_APIS = %s\n", s);
+
+   make_x_window(x_dpy, egl_dpy,
+                 "xegl_two_win #1", 0, 0, WinWidth[0], WinHeight[0],
+                 &win1, &egl_ctx, &egl_surf1);
+
+   make_x_window(x_dpy, egl_dpy,
+                 "xegl_two_win #2", WinWidth[0] + 50, 0,
+                 WinWidth[1], WinHeight[1],
+                 &win2, NULL, &egl_surf2);
+
+   XMapWindow(x_dpy, win1);
+
+   XMapWindow(x_dpy, win2);
+
+   if (!eglMakeCurrent(egl_dpy, egl_surf1, egl_surf1, egl_ctx)) {
+      printf("Error: eglMakeCurrent() failed\n");
+      return -1;
+   }
+
+   if (printInfo) {
+      for (i = 0; i < sizeof(info_items)/sizeof(info_items[0]); i++) {
+         switch (info_items[i].type) {
+            case GetString:
+               printf("%s = %s\n", info_items[i].name, (char *)glGetString(info_items[i].value));
+               break;
+            case GetInteger: {
+               GLint rv = -1;
+               glGetIntegerv(info_items[i].value, &rv);
+               printf("%s = %d\n", info_items[i].name, rv);
+               break;
+            }
+         }
+      }
+   };
+
+   init();
+
+   event_loop(x_dpy, win1, win2, egl_dpy, egl_surf1, egl_surf2, egl_ctx);
+
+   eglDestroyContext(egl_dpy, egl_ctx);
+   eglDestroySurface(egl_dpy, egl_surf1);
+   eglDestroySurface(egl_dpy, egl_surf2);
+   eglTerminate(egl_dpy);
+
+   XDestroyWindow(x_dpy, win1);
+   XDestroyWindow(x_dpy, win2);
+   XCloseDisplay(x_dpy);
+
+   return 0;
+}