progs/egl: Port ES1 gears to eglut.

As gears in the last demo under "screen" subdirectory, this also removes
the directory.

6 files changed, 28 insertions, 355 deletions

diff --git a/progs/egl/opengles1/.gitignore b/progs/egl/opengles1/.gitignore
index 8c1c9a8ef9..e95e393b00 100644
--- a/progs/egl/opengles1/.gitignore
+++ b/progs/egl/opengles1/.gitignore
@@ -1,8 +1,7 @@
-screen/gears
-screen/tri
 bindtex
 drawtex
 es1_info
+gears
 msaa
 pbuffer
 render_tex
diff --git a/progs/egl/opengles1/Makefile b/progs/egl/opengles1/Makefile
index d6c09c6abe..27caa0cd0f 100644
--- a/progs/egl/opengles1/Makefile
+++ b/progs/egl/opengles1/Makefile
@@ -22,6 +22,7 @@ ES1_LIBS = \
 EGLUT_DIR = $(TOP)/progs/egl/eglut
 
 EGLUT_DEMOS = \
+	gears \
 	tri
 
 EGLUT_X11_DEMOS := $(addsuffix _x11,$(EGLUT_DEMOS))
diff --git a/progs/egl/opengles1/screen/gears.c b/progs/egl/opengles1/gears.c
index c7625826b9..8462a4871a 100644
--- a/progs/egl/opengles1/screen/gears.c
+++ b/progs/egl/opengles1/gears.c
@@ -28,7 +28,7 @@
 #include <assert.h>
 
 #include <GLES/gl.h>
-#include "winsys.h"
+#include "eglut.h"
 
 #ifndef M_PI
 #define M_PI 3.14159265
@@ -247,7 +247,7 @@ draw_gear(const struct gear *gear)
 
 
 static void
-gears_draw(void *data)
+gears_draw(void)
 {
    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 };
@@ -288,11 +288,6 @@ gears_draw(void *data)
    glPopMatrix();
 
    glPopMatrix();
-
-   /* advance rotation for next frame */
-   angle += 0.5; /* 0.5 degree per frame */
-   if (angle > 3600.0)
-      angle -= 3600.0;
 }
 
 
@@ -348,27 +343,41 @@ gears_reshape(int width, int height)
 }
 
 
-static void gears_run(void)
+static void
+gears_idle(void)
 {
-   winsysRun(5.0, gears_draw, NULL);
+  static double t0 = -1.;
+  double dt, t = eglutGet(EGLUT_ELAPSED_TIME) / 1000.0;
+  if (t0 < 0.0)
+    t0 = t;
+  dt = t - t0;
+  t0 = t;
+
+  angle += 70.0 * dt;  /* 70 degrees per second */
+  angle = fmod(angle, 360.0); /* prevents eventual overflow */
+
+  eglutPostRedisplay();
 }
 
 
 int
 main(int argc, char *argv[])
 {
-   EGLint width, height;
+   eglutInitWindowSize(300, 300);
+   eglutInitAPIMask(EGLUT_OPENGL_ES1_BIT);
+   eglutInit(argc, argv);
 
-   if (!winsysInitScreen())
-      exit(1);
-   winsysQueryScreenSize(&width, &height);
+   eglutCreateWindow("gears");
+
+   eglutIdleFunc(gears_idle);
+   eglutReshapeFunc(gears_reshape);
+   eglutDisplayFunc(gears_draw);
 
    gears_init();
-   gears_reshape(width, height);
-   gears_run();
-   gears_fini();
 
-   winsysFiniScreen();
+   eglutMainLoop();
+
+   gears_fini();
 
    return 0;
 }
diff --git a/progs/egl/opengles1/screen/Makefile b/progs/egl/opengles1/screen/Makefile
deleted file mode 100644
index 0c3c136ff2..0000000000
--- a/progs/egl/opengles1/screen/Makefile
+++ /dev/null
@@ -1,28 +0,0 @@
-# progs/egl/opengles1/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
-
-.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)
-
-clean:
-	-rm -f *.o *~
-	-rm -f $(PROGRAMS)
diff --git a/progs/egl/opengles1/screen/winsys.c b/progs/egl/opengles1/screen/winsys.c
deleted file mode 100644
index 84d00471eb..0000000000
--- a/progs/egl/opengles1/screen/winsys.c
+++ /dev/null
@@ -1,272 +0,0 @@
-/*
- * 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/egl/opengles1/screen/winsys.h b/progs/egl/opengles1/screen/winsys.h
deleted file mode 100644
index 679c7e0bd6..0000000000
--- a/progs/egl/opengles1/screen/winsys.h
+++ /dev/null
@@ -1,36 +0,0 @@
-/*
- * 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_ */