/*
* 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);
}