Merge remote branch 'origin/opengl-es-v2'

5 files changed, 843 insertions, 0 deletions

diff --git a/progs/es1/screen/Makefile b/progs/es1/screen/Makefile
new file mode 100644
index 0000000000..4ba2f9a7dc
--- /dev/null
+++ b/progs/es1/screen/Makefile
@@ -0,0 +1,32 @@
+# progs/es1/screen/Makefile
+
+TOP = ../../..
+include $(TOP)/configs/current
+
+ES1_CFLAGS = -I$(TOP)/include
+ES1_LIBS = -L$(TOP)/$(LIB_DIR) -lEGL -lGLESv1_CM
+
+ES1_LIB_DEPS = \
+	$(TOP)/$(LIB_DIR)/libEGL.so \
+	$(TOP)/$(LIB_DIR)/libGLESv1_CM.so
+
+WINSYS_OBJS = winsys.o
+
+PROGRAMS = \
+	gears \
+	tri
+
+.c.o:
+	$(CC) -c $(ES1_CFLAGS) $(CFLAGS) $< -o $@
+
+default: $(PROGRAMS)
+
+gears: gears.o $(WINSYS_OBJS) $(ES1_LIB_DEPS)
+	$(CC) $(CFLAGS) -o $@ $@.o $(WINSYS_OBJS) $(ES1_LIBS)
+
+tri: tri.o $(WINSYS_OBJS) $(ES1_LIB_DEPS)
+	$(CC) $(CFLAGS) -o $@ $@.o $(WINSYS_OBJS) $(ES1_LIBS)
+
+clean:
+	-rm -f *.o *~
+	-rm -f $(PROGRAMS)
diff --git a/progs/es1/screen/gears.c b/progs/es1/screen/gears.c
new file mode 100644
index 0000000000..c7625826b9
--- /dev/null
+++ b/progs/es1/screen/gears.c
@@ -0,0 +1,374 @@
+/*
+ * 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 <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+#include <assert.h>
+
+#include <GLES/gl.h>
+#include "winsys.h"
+
+#ifndef M_PI
+#define M_PI 3.14159265
+#endif
+
+
+struct gear {
+   GLuint vbo;
+   GLfloat *vertices;
+   GLsizei stride;
+
+   GLint num_teeth;
+};
+
+static GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0;
+static struct gear gears[3];
+static GLfloat angle = 0.0;
+
+/*
+ *  Initialize a gear wheel.
+ *
+ *  Input:  gear - gear to initialize
+ *          inner_radius - radius of hole at center
+ *          outer_radius - radius at center of teeth
+ *          width - width of gear
+ *          teeth - number of teeth
+ *          tooth_depth - depth of tooth
+ */
+static void
+init_gear(struct gear *gear, GLfloat inner_radius, GLfloat outer_radius,
+          GLfloat width, GLint teeth, GLfloat tooth_depth)
+{
+   GLfloat r0, r1, r2;
+   GLfloat a0, da;
+   GLint verts_per_tooth, total_verts, total_size;
+   GLint count, i;
+   GLfloat *verts;
+
+   r0 = inner_radius;
+   r1 = outer_radius - tooth_depth / 2.0;
+   r2 = outer_radius + tooth_depth / 2.0;
+
+   a0 = 2.0 * M_PI / teeth;
+   da = a0 / 4.0;
+
+   gear->vbo = 0;
+   gear->vertices = NULL;
+   gear->stride = sizeof(GLfloat) * 6; /* XYZ + normal */
+   gear->num_teeth = teeth;
+
+   verts_per_tooth = 10 + 4;
+   total_verts = teeth * verts_per_tooth;
+   total_size = total_verts * gear->stride;
+
+   verts = malloc(total_size);
+   if (!verts) {
+      printf("failed to allocate vertices\n");
+      return;
+   }
+
+#define GEAR_VERT(r, n, sign)                      \
+   do {                                            \
+      verts[count * 6 + 0] = (r) * vx[n];          \
+      verts[count * 6 + 1] = (r) * vy[n];          \
+      verts[count * 6 + 2] = (sign) * width * 0.5; \
+      verts[count * 6 + 3] = normal[0];            \
+      verts[count * 6 + 4] = normal[1];            \
+      verts[count * 6 + 5] = normal[2];            \
+      count++;                                     \
+   } while (0)
+
+   count = 0;
+   for (i = 0; i < teeth; i++) {
+      GLfloat normal[3];
+      GLfloat vx[5], vy[5];
+      GLfloat u, v;
+
+      normal[0] = 0.0;
+      normal[1] = 0.0;
+      normal[2] = 0.0;
+
+      vx[0] = cos(i * a0 + 0 * da);
+      vy[0] = sin(i * a0 + 0 * da);
+      vx[1] = cos(i * a0 + 1 * da);
+      vy[1] = sin(i * a0 + 1 * da);
+      vx[2] = cos(i * a0 + 2 * da);
+      vy[2] = sin(i * a0 + 2 * da);
+      vx[3] = cos(i * a0 + 3 * da);
+      vy[3] = sin(i * a0 + 3 * da);
+      vx[4] = cos(i * a0 + 4 * da);
+      vy[4] = sin(i * a0 + 4 * da);
+
+      /* outward faces of a tooth, 10 verts */
+      normal[0] = vx[0];
+      normal[1] = vy[0];
+      GEAR_VERT(r1, 0,  1);
+      GEAR_VERT(r1, 0, -1);
+
+      u = r2 * vx[1] - r1 * vx[0];
+      v = r2 * vy[1] - r1 * vy[0];
+      normal[0] = v;
+      normal[1] = -u;
+      GEAR_VERT(r2, 1,  1);
+      GEAR_VERT(r2, 1, -1);
+
+      normal[0] = vx[0];
+      normal[1] = vy[0];
+      GEAR_VERT(r2, 2,  1);
+      GEAR_VERT(r2, 2, -1);
+
+      u = r1 * vx[3] - r2 * vx[2];
+      v = r1 * vy[3] - r2 * vy[2];
+      normal[0] = v;
+      normal[1] = -u;
+      GEAR_VERT(r1, 3,  1);
+      GEAR_VERT(r1, 3, -1);
+
+      normal[0] = vx[0];
+      normal[1] = vy[0];
+      GEAR_VERT(r1, 4,  1);
+      GEAR_VERT(r1, 4, -1);
+
+      /* inside radius cylinder, 4 verts */
+      normal[0] = -vx[4];
+      normal[1] = -vy[4];
+      GEAR_VERT(r0, 4,  1);
+      GEAR_VERT(r0, 4, -1);
+
+      normal[0] = -vx[0];
+      normal[1] = -vy[0];
+      GEAR_VERT(r0, 0,  1);
+      GEAR_VERT(r0, 0, -1);
+
+      assert(count % verts_per_tooth == 0);
+   }
+   assert(count == total_verts);
+#undef GEAR_VERT
+
+   gear->vertices = verts;
+
+   /* setup VBO */
+   glGenBuffers(1, &gear->vbo);
+   if (gear->vbo) {
+      glBindBuffer(GL_ARRAY_BUFFER, gear->vbo);
+      glBufferData(GL_ARRAY_BUFFER, total_size, verts, GL_STATIC_DRAW);
+   }
+}
+
+
+static void
+draw_gear(const struct gear *gear)
+{
+   GLint i;
+
+   if (!gear->vbo && !gear->vertices) {
+      printf("nothing to be drawn\n");
+      return;
+   }
+
+   if (gear->vbo) {
+      glBindBuffer(GL_ARRAY_BUFFER, gear->vbo);
+      glVertexPointer(3, GL_FLOAT, gear->stride, (const GLvoid *) 0);
+      glNormalPointer(GL_FLOAT, gear->stride, (const GLvoid *) (sizeof(GLfloat) * 3));
+   } else {
+      glBindBuffer(GL_ARRAY_BUFFER, 0);
+      glVertexPointer(3, GL_FLOAT, gear->stride, gear->vertices);
+      glNormalPointer(GL_FLOAT, gear->stride, gear->vertices + 3);
+   }
+
+   glEnableClientState(GL_VERTEX_ARRAY);
+
+   for (i = 0; i < gear->num_teeth; i++) {
+      const GLint base = (10 + 4) * i;
+      GLushort indices[7];
+
+      glShadeModel(GL_FLAT);
+
+      /* front face */
+      indices[0] = base + 12;
+      indices[1] = base +  0;
+      indices[2] = base +  2;
+      indices[3] = base +  4;
+      indices[4] = base +  6;
+      indices[5] = base +  8;
+      indices[6] = base + 10;
+
+      glNormal3f(0.0, 0.0, 1.0);
+      glDrawElements(GL_TRIANGLE_FAN, 7, GL_UNSIGNED_SHORT, indices);
+
+      /* back face */
+      indices[0] = base + 13;
+      indices[1] = base + 11;
+      indices[2] = base +  9;
+      indices[3] = base +  7;
+      indices[4] = base +  5;
+      indices[5] = base +  3;
+      indices[6] = base +  1;
+
+      glNormal3f(0.0, 0.0, -1.0);
+      glDrawElements(GL_TRIANGLE_FAN, 7, GL_UNSIGNED_SHORT, indices);
+
+      glEnableClientState(GL_NORMAL_ARRAY);
+
+      /* outward face of a tooth */
+      glDrawArrays(GL_TRIANGLE_STRIP, base, 10);
+
+      /* inside radius cylinder */
+      glShadeModel(GL_SMOOTH);
+      glDrawArrays(GL_TRIANGLE_STRIP, base + 10, 4);
+
+      glDisableClientState(GL_NORMAL_ARRAY);
+   }
+
+   glDisableClientState(GL_VERTEX_ARRAY);
+}
+
+
+static void
+gears_draw(void *data)
+{
+   static const GLfloat red[4] = { 0.8, 0.1, 0.0, 1.0 };
+   static const GLfloat green[4] = { 0.0, 0.8, 0.2, 1.0 };
+   static const GLfloat blue[4] = { 0.2, 0.2, 1.0, 1.0 };
+
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   glPushMatrix();
+   glRotatef(view_rotx, 1.0, 0.0, 0.0);
+   glRotatef(view_roty, 0.0, 1.0, 0.0);
+   glRotatef(view_rotz, 0.0, 0.0, 1.0);
+
+   glPushMatrix();
+   glTranslatef(-3.0, -2.0, 0.0);
+   glRotatef(angle, 0.0, 0.0, 1.0);
+
+   glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, red);
+   draw_gear(&gears[0]);
+
+   glPopMatrix();
+
+   glPushMatrix();
+   glTranslatef(3.1, -2.0, 0.0);
+   glRotatef(-2.0 * angle - 9.0, 0.0, 0.0, 1.0);
+
+   glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, green);
+   draw_gear(&gears[1]);
+
+   glPopMatrix();
+
+   glPushMatrix();
+   glTranslatef(-3.1, 4.2, 0.0);
+   glRotatef(-2.0 * angle - 25.0, 0.0, 0.0, 1.0);
+
+   glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue);
+   draw_gear(&gears[2]);
+
+   glPopMatrix();
+
+   glPopMatrix();
+
+   /* advance rotation for next frame */
+   angle += 0.5; /* 0.5 degree per frame */
+   if (angle > 3600.0)
+      angle -= 3600.0;
+}
+
+
+static void gears_fini(void)
+{
+   GLint i;
+   for (i = 0; i < 3; i++) {
+      struct gear *gear = &gears[i];
+      if (gear->vbo) {
+         glDeleteBuffers(1, &gear->vbo);
+         gear->vbo = 0;
+      }
+      if (gear->vertices) {
+         free(gear->vertices);
+         gear->vertices = NULL;
+      }
+   }
+}
+
+
+static void gears_init(void)
+{
+   static const GLfloat pos[4] = { 5.0, 5.0, 10.0, 0.0 };
+
+   glLightfv(GL_LIGHT0, GL_POSITION, pos);
+   glEnable(GL_CULL_FACE);
+   glEnable(GL_LIGHTING);
+   glEnable(GL_LIGHT0);
+   glEnable(GL_DEPTH_TEST);
+   glEnable(GL_NORMALIZE);
+
+   init_gear(&gears[0], 1.0, 4.0, 1.0, 20, 0.7);
+   init_gear(&gears[1], 0.5, 2.0, 2.0, 10, 0.7);
+   init_gear(&gears[2], 1.3, 2.0, 0.5, 10, 0.7);
+}
+
+
+/* new window size or exposure */
+static void
+gears_reshape(int width, int height)
+{
+   GLfloat h = (GLfloat) height / (GLfloat) width;
+
+   glViewport(0, 0, (GLint) width, (GLint) height);
+
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glFrustumf(-1.0, 1.0, -h, h, 5.0, 60.0);
+
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef(0.0, 0.0, -40.0);
+}
+
+
+static void gears_run(void)
+{
+   winsysRun(5.0, gears_draw, NULL);
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   EGLint width, height;
+
+   if (!winsysInitScreen())
+      exit(1);
+   winsysQueryScreenSize(&width, &height);
+
+   gears_init();
+   gears_reshape(width, height);
+   gears_run();
+   gears_fini();
+
+   winsysFiniScreen();
+
+   return 0;
+}
diff --git a/progs/es1/screen/tri.c b/progs/es1/screen/tri.c
new file mode 100644
index 0000000000..bab9499944
--- /dev/null
+++ b/progs/es1/screen/tri.c
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2009 Chia-I Wu <olv@0xlab.org>
+ *
+ * Based on egltri by
+ * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
+ * Copyright (C) 2008  Brian Paul   All Rights Reserved.
+ * Copyright (C) 2008  Jakob Bornecrantz   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 <GLES/gl.h>
+#include "winsys.h"
+
+static GLfloat view_rotx = 0.0, view_roty = 0.0, view_rotz = 0.0;
+
+static void tri_init()
+{
+   glClearColor(0.4, 0.4, 0.4, 0.0);
+}
+
+static void tri_reshape(int width, int height)
+{
+   GLfloat ar = (GLfloat) width / (GLfloat) height;
+
+   glViewport(0, 0, (GLint) width, (GLint) height);
+
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glFrustumf(-ar, ar, -1, 1, 5.0, 60.0);
+
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef(0.0, 0.0, -10.0);
+}
+
+static void tri_draw(void *data)
+{
+   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 }
+   };
+
+   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);
+
+   {
+      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 tri_run(void)
+{
+   winsysRun(3.0, tri_draw, NULL);
+}
+
+int main(int argc, char *argv[])
+{
+   EGLint width, height;
+   GLboolean printInfo = GL_FALSE;
+   int i;
+
+   /* parse cmd line args */
+   for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "-info") == 0) {
+         printInfo = GL_TRUE;
+      }
+      else {
+         printf("Warning: unknown parameter: %s\n", argv[i]);
+      }
+   }
+
+   if (!winsysInitScreen())
+      exit(1);
+   winsysQueryScreenSize(&width, &height);
+
+   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));
+   }
+
+   tri_init();
+   tri_reshape(width, height);
+   tri_run();
+
+   winsysFiniScreen();
+
+   return 0;
+}
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);
+}
diff --git a/progs/es1/screen/winsys.h b/progs/es1/screen/winsys.h
new file mode 100644
index 0000000000..679c7e0bd6
--- /dev/null
+++ b/progs/es1/screen/winsys.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2009 Chia-I Wu <olv@0xlab.org>
+ *
+ * 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.
+ */
+
+#ifndef _WINSYS_H_
+#define _WINSYS_H_
+
+#include <EGL/egl.h>
+
+EGLBoolean winsysInitScreen(void);
+EGLBoolean winsysQueryScreenSize(EGLint *width, EGLint *height);
+void winsysFiniScreen(void);
+
+void winsysSwapBuffers(void);
+double winsysNow(void);
+
+void winsysRun(double seconds, void (*draw_frame)(void *data), void *data);
+
+#endif /* _WINSYS_H_ */