1 files changed, 272 insertions, 0 deletions
diff --git a/progs/es1/screen/winsys.c b/progs/es1/screen/winsys.c
new file mode 100644
index 0000000000..84d00471eb
--- /dev/null
+++ b/progs/es1/screen/winsys.c
@@ -0,0 +1,272 @@
+/*
+ * Copyright (C) 2009 Chia-I Wu <olv@0xlab.org>
+ *
+ * Based on eglgears by
+ * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <sys/time.h>
+
+#define EGL_EGLEXT_PROTOTYPES
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
+#include "winsys.h"
+
+#define MAX_MODES 100
+
+static struct {
+   EGLBoolean verbose;
+
+   EGLDisplay dpy;
+   EGLConfig conf;
+
+   EGLScreenMESA screen;
+   EGLModeMESA mode;
+   EGLint width, height;
+
+   EGLContext ctx;
+   EGLSurface surf;
+} screen;
+
+
+static EGLBoolean
+init_screen(void)
+{
+   EGLModeMESA modes[MAX_MODES];
+   EGLint num_screens, num_modes;
+   EGLint width, height, best_mode;
+   EGLint i;
+
+   if (!eglGetScreensMESA(screen.dpy, &screen.screen, 1, &num_screens) ||
+       !num_screens) {
+      printf("eglGetScreensMESA failed\n");
+      return EGL_FALSE;
+   }
+
+   if (!eglGetModesMESA(screen.dpy, screen.screen, modes, MAX_MODES,
+                        &num_modes) ||
+       !num_modes) {
+      printf("eglGetModesMESA failed!\n");
+      return EGL_FALSE;
+   }
+
+   printf("Found %d modes:\n", num_modes);
+
+   best_mode = 0;
+   width = 0;
+   height = 0;
+   for (i = 0; i < num_modes; i++) {
+      EGLint w, h;
+      eglGetModeAttribMESA(screen.dpy, modes[i], EGL_WIDTH, &w);
+      eglGetModeAttribMESA(screen.dpy, modes[i], EGL_HEIGHT, &h);
+      printf("%3d: %d x %d\n", i, w, h);
+      if (w > width && h > height) {
+         width = w;
+         height = h;
+         best_mode = i;
+      }
+   }
+
+   screen.mode = modes[best_mode];
+   screen.width = width;
+   screen.height = height;
+
+   return EGL_TRUE;
+}
+
+
+static EGLBoolean
+init_display(void)
+{
+   EGLint maj, min;
+   const char *exts;
+   const EGLint attribs[] = {
+      EGL_SURFACE_TYPE, 0x0,    /* should be EGL_SCREEN_BIT_MESA */
+      EGL_RENDERABLE_TYPE, 0x0, /* should be EGL_OPENGL_ES_BIT */
+      EGL_NONE
+   };
+   EGLint num_configs;
+
+   screen.dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+   if (!screen.dpy) {
+      printf("eglGetDisplay failed\n");
+      return EGL_FALSE;
+   }
+
+   if (!eglInitialize(screen.dpy, &maj, &min)) {
+      printf("eglInitialize failed\n");
+      return EGL_FALSE;
+   }
+
+   printf("EGL_VERSION = %s\n", eglQueryString(screen.dpy, EGL_VERSION));
+   printf("EGL_VENDOR = %s\n", eglQueryString(screen.dpy, EGL_VENDOR));
+
+   exts = eglQueryString(screen.dpy, EGL_EXTENSIONS);
+   assert(exts);
+
+   if (!strstr(exts, "EGL_MESA_screen_surface")) {
+      printf("EGL_MESA_screen_surface is not supported\n");
+      return EGL_FALSE;
+   }
+
+   if (!eglChooseConfig(screen.dpy, attribs, &screen.conf, 1,
+                        &num_configs) ||
+       !num_configs) {
+      printf("eglChooseConfig failed\n");
+      return EGL_FALSE;
+   }
+
+   return EGL_TRUE;
+}
+
+
+EGLBoolean
+winsysInitScreen(void)
+{
+        EGLint surf_attribs[20];
+        EGLint i;
+        EGLBoolean ok;
+
+        if (!init_display())
+           goto fail;
+        if (!init_screen())
+           goto fail;
+
+        /* create context */
+	screen.ctx = eglCreateContext(screen.dpy, screen.conf,
+                                      EGL_NO_CONTEXT, NULL);
+	if (screen.ctx == EGL_NO_CONTEXT) {
+		printf("eglCreateContext failed\n");
+                goto fail;
+	}
+
+	i = 0;
+	surf_attribs[i++] = EGL_WIDTH;
+	surf_attribs[i++] = screen.width;
+	surf_attribs[i++] = EGL_HEIGHT;
+	surf_attribs[i++] = screen.height;
+	surf_attribs[i++] = EGL_NONE;
+
+        /* create surface */
+        printf("Using screen size: %d x %d\n", screen.width, screen.height);
+        screen.surf = eglCreateScreenSurfaceMESA(screen.dpy, screen.conf,
+                                                 surf_attribs);
+	if (screen.surf == EGL_NO_SURFACE) {
+		printf("eglCreateScreenSurfaceMESA failed\n");
+                goto fail;
+	}
+
+	ok = eglMakeCurrent(screen.dpy, screen.surf, screen.surf, screen.ctx);
+	if (!ok) {
+		printf("eglMakeCurrent failed\n");
+		goto fail;
+	}
+
+	ok = eglShowScreenSurfaceMESA(screen.dpy, screen.screen,
+                                      screen.surf, screen.mode);
+	if (!ok) {
+		printf("eglShowScreenSurfaceMESA failed\n");
+                goto fail;
+	}
+
+        return EGL_TRUE;
+
+fail:
+        winsysFiniScreen();
+        return EGL_FALSE;
+}
+
+
+EGLBoolean
+winsysQueryScreenSize(EGLint *width, EGLint *height)
+{
+   if (!screen.dpy)
+      return EGL_FALSE;
+
+   if (width)
+      *width = screen.width;
+   if (height)
+      *height = screen.height;
+
+   return EGL_TRUE;
+}
+
+
+void
+winsysFiniScreen(void)
+{
+   if (screen.dpy) {
+      eglMakeCurrent(screen.dpy, EGL_NO_SURFACE, EGL_NO_SURFACE,
+                     EGL_NO_CONTEXT);
+      if (screen.surf != EGL_NO_SURFACE)
+         eglDestroySurface(screen.dpy, screen.surf);
+      if (screen.ctx != EGL_NO_CONTEXT)
+         eglDestroyContext(screen.dpy, screen.ctx);
+      eglTerminate(screen.dpy);
+
+      memset(&screen, 0, sizeof(screen));
+   }
+}
+
+
+void
+winsysSwapBuffers(void)
+{
+   eglSwapBuffers(screen.dpy, screen.surf);
+}
+
+
+/* return current time (in seconds) */
+double
+winsysNow(void)
+{
+   struct timeval tv;
+   gettimeofday(&tv, NULL);
+   return (double) tv.tv_sec + tv.tv_usec / 1000000.0;
+}
+
+
+void
+winsysRun(double seconds, void (*draw_frame)(void *data), void *data)
+{
+        double begin, end, last_frame, duration;
+	EGLint num_frames = 0;
+
+        begin = winsysNow();
+        end = begin + seconds;
+
+        last_frame = begin;
+        while (last_frame < end) {
+           draw_frame(data);
+           winsysSwapBuffers();
+           last_frame = winsysNow();
+           num_frames++;
+        }
+
+        duration = last_frame - begin;
+	printf("%d frames in %3.1f seconds = %6.3f FPS\n",
+               num_frames, duration, (double) num_frames / duration);
+}