progs/egl: Port ES1 tri to eglut.

This also removes EGL_MESA_screen_surface version of ES1 tri as eglut
supports the extension.

1 files changed, 26 insertions, 285 deletions

diff --git a/progs/egl/opengles1/tri.c b/progs/egl/opengles1/tri.c
index 42a978207c..01ad9bd37e 100644
--- a/progs/egl/opengles1/tri.c
+++ b/progs/egl/opengles1/tri.c
@@ -25,27 +25,18 @@
  * 5 June 2008
  */
 
-#define USE_FULL_GL 0
-
 #define USE_FIXED_POINT 0
 
 
 #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>
-#if USE_FULL_GL
-#include <GL/gl.h>  /* use full OpenGL */
-#else
 #include <GLES/gl.h>  /* use OpenGL ES 1.x */
 #include <GLES/glext.h>
-#endif
 #include <EGL/egl.h>
 
+#include "eglut.h"
+
 
 #define FLOAT_TO_FIXED(X)   ((X) * 65535.0)
 
@@ -178,293 +169,43 @@ init(void)
       test_query_matrix();
 }
 
-
-/*
- * 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, 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);
-   }
-
-#if USE_FULL_GL
-   eglBindAPI(EGL_OPENGL_API);
-#else
-   eglBindAPI(EGL_OPENGL_ES_API);
-#endif
-
-   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);
-   }
-
-   XFree(visInfo);
-
-   *winRet = win;
-   *ctxRet = ctx;
-}
-
-
 static void
-event_loop(Display *dpy, Window win,
-           EGLDisplay egl_dpy, EGLSurface egl_surf)
+special_key(int special)
 {
-   while (1) {
-      int redraw = 0;
-      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 {
-               r = XLookupString(&event.xkey, buffer, sizeof(buffer),
-                                 NULL, NULL);
-               if (buffer[0] == 27) {
-                  /* escape */
-                  return;
-               }
-            }
-         }
-         redraw = 1;
-         break;
-      default:
-         ; /*no-op*/
-      }
-
-      if (redraw) {
-         draw();
-         eglSwapBuffers(egl_dpy, egl_surf);
-      }
+   switch (special) {
+   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;
    }
 }
 
-
-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[])
 {
-   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;
-
-   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;
-      }
-   }
+   eglutInitWindowSize(300, 300);
+   eglutInitAPIMask(EGLUT_OPENGL_ES1_BIT);
+   eglutInit(argc, argv);
 
-   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);
+   eglutCreateWindow("tri");
 
-   make_x_window(x_dpy, egl_dpy,
-                 "OpenGL ES 1.x tri", 0, 0, winWidth, winHeight,
-                 &win, &egl_ctx, &egl_surf);
+   eglutReshapeFunc(reshape);
+   eglutDisplayFunc(draw);
+   eglutSpecialFunc(special_key);
 
-   XMapWindow(x_dpy, win);
-   if (!eglMakeCurrent(egl_dpy, egl_surf, egl_surf, 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();
 
-   /* 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;
 }