progs/egl: Port drawtex and torus to eglut.

This brings the demos also to KMS and removes about 400 duplicated lines
of code.

6 files changed, 150 insertions, 548 deletions

diff --git a/progs/egl/eglut/eglut.c b/progs/egl/eglut/eglut.c
index 0bfd5d5b06..b9b5e6e5a8 100644
--- a/progs/egl/eglut/eglut.c
+++ b/progs/egl/eglut/eglut.c
@@ -195,6 +195,13 @@ eglutInit(int argc, char **argv)
    _eglut->init_time = _eglutNow();
 
    printf("EGL_VERSION = %s\n", eglQueryString(_eglut->dpy, EGL_VERSION));
+   if (_eglut->verbose) {
+      printf("EGL_VENDOR = %s\n", eglQueryString(_eglut->dpy, EGL_VENDOR));
+      printf("EGL_EXTENSIONS = %s\n",
+            eglQueryString(_eglut->dpy, EGL_EXTENSIONS));
+      printf("EGL_CLIENT_APIS = %s\n",
+            eglQueryString(_eglut->dpy, EGL_CLIENT_APIS));
+   }
 }
 
 int
@@ -247,14 +254,27 @@ _eglutFini(void)
    _eglutNativeFiniDisplay();
 }
 
+void
+eglutDestroyWindow(int win)
+{
+   struct eglut_window *window = _eglut->current;
+
+   if (window->index != win)
+      return;
+
+   /* XXX it causes some bug in st/egl KMS backend */
+   if ( _eglut->surface_type != EGL_SCREEN_BIT_MESA)
+      eglMakeCurrent(_eglut->dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+
+   _eglutDestroyWindow(_eglut->current);
+}
+
 static void
 _eglutDefaultKeyboard(unsigned char key)
 {
    if (key == 27) {
-      /* XXX it causes some bug in st/egl KMS backend */
-      if ( _eglut->surface_type != EGL_SCREEN_BIT_MESA)
-         eglMakeCurrent(_eglut->dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
-      _eglutDestroyWindow(_eglut->current);
+      if (_eglut->current)
+         eglutDestroyWindow(_eglut->current->index);
       _eglutFini();
 
       exit(0);
diff --git a/progs/egl/eglut/eglut.h b/progs/egl/eglut/eglut.h
index 521cc12eab..07df4ba9f7 100644
--- a/progs/egl/eglut/eglut.h
+++ b/progs/egl/eglut/eglut.h
@@ -55,6 +55,7 @@ void eglutPostRedisplay(void);
 void eglutMainLoop(void);
 
 int eglutCreateWindow(const char *title);
+void eglutDestroyWindow(int win);
 
 int eglutGetWindowWidth(void);
 int eglutGetWindowHeight(void);
diff --git a/progs/egl/opengles1/.gitignore b/progs/egl/opengles1/.gitignore
index 2caf094edb..135e3deb35 100644
--- a/progs/egl/opengles1/.gitignore
+++ b/progs/egl/opengles1/.gitignore
@@ -1,12 +1,15 @@
 bindtex
-drawtex
+drawtex_x11
+drawtex_screen
 es1_info
 gears_x11
 gears_screen
 msaa
 pbuffer
 render_tex
-torus
+texture_from_pixmap
+torus_x11
+torus_screen
 tri_x11
 tri_screen
 two_win
diff --git a/progs/egl/opengles1/Makefile b/progs/egl/opengles1/Makefile
index dac911e39f..554cff9e6b 100644
--- a/progs/egl/opengles1/Makefile
+++ b/progs/egl/opengles1/Makefile
@@ -22,7 +22,9 @@ ES1_LIBS = \
 EGLUT_DIR = $(TOP)/progs/egl/eglut
 
 EGLUT_DEMOS = \
+	drawtex \
 	gears \
+	torus \
 	tri
 
 EGLUT_X11_DEMOS := $(addsuffix _x11,$(EGLUT_DEMOS))
@@ -30,13 +32,11 @@ EGLUT_SCREEN_DEMOS := $(addsuffix _screen,$(EGLUT_DEMOS))
 
 PROGRAMS = \
 	bindtex \
-	drawtex \
 	es1_info \
 	msaa \
 	pbuffer \
 	render_tex \
 	texture_from_pixmap \
-	torus \
 	two_win
 
 
@@ -53,10 +53,6 @@ bindtex: bindtex.o $(ES1_LIB_DEPS)
 	$(CC) $(CFLAGS) bindtex.o $(ES1_LIBS) -o $@
 
 
-drawtex: drawtex.o $(ES1_LIB_DEPS)
-	$(CC) $(CFLAGS) drawtex.o $(ES1_LIBS) -o $@
-
-
 es1_info: es1_info.o $(ES1_LIB_DEPS)
 	$(CC) $(CFLAGS) es1_info.o $(ES1_LIBS) -o $@
 
diff --git a/progs/egl/opengles1/drawtex.c b/progs/egl/opengles1/drawtex.c
index ca0615e267..e9ac015340 100644
--- a/progs/egl/opengles1/drawtex.c
+++ b/progs/egl/opengles1/drawtex.c
@@ -10,22 +10,20 @@
 
 #define GL_GLEXT_PROTOTYPES
 
-#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>
 
+#include "eglut.h"
 
 
 static GLfloat view_posx = 10.0, view_posy = 20.0;
 static GLfloat width = 200, height = 200;
+static GLboolean animate = GL_FALSE;
+static int win;
 
 
 static void
@@ -137,291 +135,83 @@ init(void)
 }
 
 
-/*
- * 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)
+idle(void)
 {
-   static const EGLint attribs[] = {
-      EGL_RED_SIZE, 1,
-      EGL_GREEN_SIZE, 1,
-      EGL_BLUE_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, 0, 0, width, height,
-		        0, visInfo->depth, InputOutput,
-		        visInfo->visual, mask, &attr );
-
-   /* set hints and properties */
-   {
-      XSizeHints sizehints;
-      sizehints.x = x;
-      sizehints.y = y;
-      sizehints.width  = width;
-      sizehints.height = height;
-      sizehints.flags = USSize | USPosition;
-      XSetNormalHints(x_dpy, win, &sizehints);
-      XSetStandardProperties(x_dpy, win, name, name,
-                              None, (char **)NULL, 0, &sizehints);
-   }
-
-   eglBindAPI(EGL_OPENGL_ES_API);
-
-   ctx = eglCreateContext(egl_dpy, config, EGL_NO_CONTEXT, NULL );
-   if (!ctx) {
-      printf("Error: eglCreateContext failed\n");
-      exit(1);
-   }
-
-   *surfRet = eglCreateWindowSurface(egl_dpy, config, win, NULL);
-
-   if (!*surfRet) {
-      printf("Error: eglCreateWindowSurface failed\n");
-      exit(1);
+   if (animate) {
+      view_posx += 1.0;
+      view_posy += 2.0;
+      eglutPostRedisplay();
    }
-
-   XFree(visInfo);
-
-   *winRet = win;
-   *ctxRet = ctx;
 }
 
-
 static void
-event_loop(Display *dpy, Window win,
-           EGLDisplay egl_dpy, EGLSurface egl_surf)
+key(unsigned char key)
 {
-   int anim = 0;
-
-   while (1) {
-      int redraw = 0;
-
-      if (!anim || XPending(dpy)) {
-         XEvent event;
-         XNextEvent(dpy, &event);
-
-         switch (event.type) {
-         case Expose:
-            redraw = 1;
-            break;
-         case ConfigureNotify:
-            reshape(event.xconfigure.width, event.xconfigure.height);
-            break;
-         case KeyPress:
-            {
-               char buffer[10];
-               int r, code;
-               code = XLookupKeysym(&event.xkey, 0);
-               if (code == XK_Left) {
-               view_posx -= 1.0;
-               }
-               else if (code == XK_Right) {
-                  view_posx += 1.0;
-               }
-               else if (code == XK_Up) {
-                  view_posy += 1.0;
-               }
-               else if (code == XK_Down) {
-                  view_posy -= 1.0;
-               }
-               else {
-                  r = XLookupString(&event.xkey, buffer, sizeof(buffer),
-                                    NULL, NULL);
-                  if (buffer[0] == ' ') {
-                     anim = !anim;
-                  }
-                  else if (buffer[0] == 'w') {
-                     width -= 1.0f;
-                  }
-                  else if (buffer[0] == 'W') {
-                     width += 1.0f;
-                  }
-                  else if (buffer[0] == 'h') {
-                     height -= 1.0f;
-                  }
-                  else if (buffer[0] == 'H') {
-                     height += 1.0f;
-                  }
-                  else if (buffer[0] == 27) {
-                     /* escape */
-                     return;
-                  }
-               }
-            }
-            redraw = 1;
-            break;
-         default:
-            ; /*no-op*/
-         }
-      }
-
-      if (anim) {
-         view_posx += 1.0;
-         view_posy += 2.0;
-         redraw = 1;
-      }
-
-      if (redraw) {
-         draw();
-         eglSwapBuffers(egl_dpy, egl_surf);
-      }
+   switch (key) {
+   case ' ':
+      animate = !animate;
+      break;
+   case 'w':
+      width -= 1.0f;
+      break;
+   case 'W':
+      width += 1.0f;
+      break;
+   case 'h':
+      height -= 1.0f;
+      break;
+   case 'H':
+      height += 1.0f;
+      break;
+   case 27:
+      eglutDestroyWindow(win);
+      exit(0);
+      break;
+   default:
+      break;
    }
 }
 
-
 static void
-usage(void)
+special_key(int key)
 {
-   printf("Usage:\n");
-   printf("  -display <displayname>  set the display to run on\n");
-   printf("  -info                   display OpenGL renderer info\n");
+   switch (key) {
+   case EGLUT_KEY_LEFT:
+      view_posx -= 1.0;
+      break;
+   case EGLUT_KEY_RIGHT:
+      view_posx += 1.0;
+      break;
+   case EGLUT_KEY_UP:
+      view_posy += 1.0;
+      break;
+   case EGLUT_KEY_DOWN:
+      view_posy -= 1.0;
+      break;
+   default:
+      break;
+   }
 }
- 
 
 int
 main(int argc, char *argv[])
 {
-   const int winWidth = 400, winHeight = 300;
-   Display *x_dpy;
-   Window win;
-   EGLSurface egl_surf;
-   EGLContext egl_ctx;
-   EGLDisplay egl_dpy;
-   char *dpyName = NULL;
-   GLboolean printInfo = GL_FALSE;
-   EGLint egl_major, egl_minor;
-   int i;
-   const char *s;
-
-   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;
-   }
+   eglutInitWindowSize(400, 300);
+   eglutInitAPIMask(EGLUT_OPENGL_ES1_BIT);
+   eglutInit(argc, argv);
 
-   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);
+   win = eglutCreateWindow("drawtex");
 
-   s = eglQueryString(egl_dpy, EGL_CLIENT_APIS);
-   printf("EGL_CLIENT_APIS = %s\n", s);
-
-   make_x_window(x_dpy, egl_dpy,
-                 "drawtex", 0, 0, winWidth, winHeight,
-                 &win, &egl_ctx, &egl_surf);
-
-   XMapWindow(x_dpy, win);
-   if (!eglMakeCurrent(egl_dpy, egl_surf, egl_surf, egl_ctx)) {
-      printf("Error: eglMakeCurrent() failed\n");
-      return -1;
-   }
-
-   if (printInfo) {
-      printf("GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
-      printf("GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
-      printf("GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
-      printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
-   }
+   eglutIdleFunc(idle);
+   eglutReshapeFunc(reshape);
+   eglutDisplayFunc(draw);
+   eglutKeyboardFunc(key);
+   eglutSpecialFunc(special_key);
 
    init();
 
-   /* Set initial projection/viewing transformation.
-    * We can't be sure we'll get a ConfigureNotify event when the window
-    * first appears.
-    */
-   reshape(winWidth, winHeight);
-
-   event_loop(x_dpy, win, egl_dpy, egl_surf);
-
-   eglDestroyContext(egl_dpy, egl_ctx);
-   eglDestroySurface(egl_dpy, egl_surf);
-   eglTerminate(egl_dpy);
-
-
-   XDestroyWindow(x_dpy, win);
-   XCloseDisplay(x_dpy);
+   eglutMainLoop();
 
    return 0;
 }
diff --git a/progs/egl/opengles1/torus.c b/progs/egl/opengles1/torus.c
index 9438a4fe59..8f262b53d6 100644
--- a/progs/egl/opengles1/torus.c
+++ b/progs/egl/opengles1/torus.c
@@ -13,14 +13,9 @@
 #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>
 
+#include "eglut.h"
 
 static const struct {
    GLenum internalFormat;
@@ -43,6 +38,8 @@ static const struct {
 
 static GLfloat view_rotx = 0.0, view_roty = 0.0, view_rotz = 0.0;
 static GLint tex_format = NUM_CPAL_FORMATS;
+static GLboolean animate = GL_TRUE;
+static int win;
 
 
 static void
@@ -364,293 +361,88 @@ init(void)
 }
 
 
-/*
- * 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)
+idle(void)
 {
-   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, 0, 0, width, height,
-		        0, visInfo->depth, InputOutput,
-		        visInfo->visual, mask, &attr );
-
-   /* set hints and properties */
-   {
-      XSizeHints sizehints;
-      sizehints.x = x;
-      sizehints.y = y;
-      sizehints.width  = width;
-      sizehints.height = height;
-      sizehints.flags = USSize | USPosition;
-      XSetNormalHints(x_dpy, win, &sizehints);
-      XSetStandardProperties(x_dpy, win, name, name,
-                              None, (char **)NULL, 0, &sizehints);
-   }
-
-   eglBindAPI(EGL_OPENGL_ES_API);
-
-   ctx = eglCreateContext(egl_dpy, config, EGL_NO_CONTEXT, NULL );
-   if (!ctx) {
-      printf("Error: eglCreateContext failed\n");
-      exit(1);
-   }
-
-   *surfRet = eglCreateWindowSurface(egl_dpy, config, win, NULL);
-
-   if (!*surfRet) {
-      printf("Error: eglCreateWindowSurface failed\n");
-      exit(1);
+   if (animate) {
+      view_rotx += 1.0;
+      view_roty += 2.0;
+      eglutPostRedisplay();
    }
-
-   XFree(visInfo);
-
-   *winRet = win;
-   *ctxRet = ctx;
 }
 
-
 static void
-event_loop(Display *dpy, Window win,
-           EGLDisplay egl_dpy, EGLSurface egl_surf)
+key(unsigned char key)
 {
-   int anim = 1;
-
-   while (1) {
-      int redraw = 0;
-
-      if (!anim || XPending(dpy)) {
-         XEvent event;
-         XNextEvent(dpy, &event);
-
-         switch (event.type) {
-         case Expose:
-            redraw = 1;
-            break;
-         case ConfigureNotify:
-            reshape(event.xconfigure.width, event.xconfigure.height);
-            break;
-         case KeyPress:
-            {
-               char buffer[10];
-               int r, code;
-               code = XLookupKeysym(&event.xkey, 0);
-               if (code == XK_Left) {
-               view_roty += 5.0;
-               }
-               else if (code == XK_Right) {
-                  view_roty -= 5.0;
-               }
-               else if (code == XK_Up) {
-                  view_rotx += 5.0;
-               }
-               else if (code == XK_Down) {
-                  view_rotx -= 5.0;
-               }
-               else if (code == XK_t) {
-                  GLint size;
-                  tex_format = (tex_format + 1) % (NUM_CPAL_FORMATS + 1);
-                  if (tex_format < NUM_CPAL_FORMATS) {
-                     size = make_cpal_texture(tex_format);
-                     printf("Using %s (%d bytes)\n",
-                           cpal_formats[tex_format].name, size);
-                  }
-                  else {
-                     size = make_texture();
-                     printf("Using uncompressed texture (%d bytes)\n", size);
-                  }
-               }
-               else {
-                  r = XLookupString(&event.xkey, buffer, sizeof(buffer),
-                                    NULL, NULL);
-                  if (buffer[0] == ' ') {
-                     anim = !anim;
-                  }
-                  else if (buffer[0] == 27) {
-                     /* escape */
-                     return;
-                  }
-               }
-            }
-            redraw = 1;
-            break;
-         default:
-            ; /*no-op*/
+   switch (key) {
+   case ' ':
+      animate = !animate;
+      break;
+   case 't':
+      {
+         GLint size;
+         tex_format = (tex_format + 1) % (NUM_CPAL_FORMATS + 1);
+         if (tex_format < NUM_CPAL_FORMATS) {
+            size = make_cpal_texture(tex_format);
+            printf("Using %s (%d bytes)\n",
+                  cpal_formats[tex_format].name, size);
+         }
+         else {
+            size = make_texture();
+            printf("Using uncompressed texture (%d bytes)\n", size);
          }
-      }
-
-      if (anim) {
-         view_rotx += 1.0;
-         view_roty += 2.0;
-         redraw = 1;
-      }
 
-      if (redraw) {
-         draw();
-         eglSwapBuffers(egl_dpy, egl_surf);
+         eglutPostRedisplay();
       }
+      break;
+   case 27:
+      eglutDestroyWindow(win);
+      exit(0);
+      break;
+   default:
+      break;
    }
 }
 
-
 static void
-usage(void)
+special_key(int key)
 {
-   printf("Usage:\n");
-   printf("  -display <displayname>  set the display to run on\n");
-   printf("  -info                   display OpenGL renderer info\n");
+   switch (key) {
+   case EGLUT_KEY_LEFT:
+      view_roty += 5.0;
+      break;
+   case EGLUT_KEY_RIGHT:
+      view_roty -= 5.0;
+      break;
+   case EGLUT_KEY_UP:
+      view_rotx += 5.0;
+      break;
+   case EGLUT_KEY_DOWN:
+      view_rotx -= 5.0;
+      break;
+   default:
+      break;
+   }
 }
- 
 
 int
 main(int argc, char *argv[])
 {
-   const int winWidth = 300, winHeight = 300;
-   Display *x_dpy;
-   Window win;
-   EGLSurface egl_surf;
-   EGLContext egl_ctx;
-   EGLDisplay egl_dpy;
-   char *dpyName = NULL;
-   GLboolean printInfo = GL_FALSE;
-   EGLint egl_major, egl_minor;
-   int i;
-   const char *s;
-
-   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);
+   eglutInitWindowSize(300, 300);
+   eglutInitAPIMask(EGLUT_OPENGL_ES1_BIT);
+   eglutInit(argc, argv);
 
-   make_x_window(x_dpy, egl_dpy,
-                 "torus", 0, 0, winWidth, winHeight,
-                 &win, &egl_ctx, &egl_surf);
+   win = eglutCreateWindow("torus");
 
-   XMapWindow(x_dpy, win);
-   if (!eglMakeCurrent(egl_dpy, egl_surf, egl_surf, egl_ctx)) {
-      printf("Error: eglMakeCurrent() failed\n");
-      return -1;
-   }
-
-   if (printInfo) {
-      printf("GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
-      printf("GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
-      printf("GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
-      printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
-   }
+   eglutIdleFunc(idle);
+   eglutReshapeFunc(reshape);
+   eglutDisplayFunc(draw);
+   eglutKeyboardFunc(key);
+   eglutSpecialFunc(special_key);
 
    init();
 
-   /* Set initial projection/viewing transformation.
-    * We can't be sure we'll get a ConfigureNotify event when the window
-    * first appears.
-    */
-   reshape(winWidth, winHeight);
-
-   event_loop(x_dpy, win, egl_dpy, egl_surf);
-
-   eglDestroyContext(egl_dpy, egl_ctx);
-   eglDestroySurface(egl_dpy, egl_surf);
-   eglTerminate(egl_dpy);
-
-
-   XDestroyWindow(x_dpy, win);
-   XCloseDisplay(x_dpy);
+   eglutMainLoop();
 
    return 0;
 }