static void
init_kms(void)
{
EGLModeMESA modes[MAX_MODES];
EGLint num_screens, num_modes;
EGLint width, height, best_mode;
EGLint i;
if (!eglGetScreensMESA(_eglut->dpy, &kms_screen, 1, &num_screens) ||
!num_screens)
_eglutFatal("eglGetScreensMESA failed\n");
if (!eglGetModesMESA(_eglut->dpy, kms_screen,
modes, MAX_MODES, &num_modes) || !num_modes)
_eglutFatal("eglGetModesMESA failed!\n");
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(_eglut->dpy, modes[i], EGL_WIDTH, &w);
eglGetModeAttribMESA(_eglut->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;
}
}
printf("Will use screen size: %d x %d\n", width, height);
kms_mode = modes[best_mode];
kms_width = width;
kms_height = height;
}
int
main(int argc, char *argv[])
{
int maj, min;
EGLContext ctx;
EGLSurface screen_surf;
EGLConfig configs[10];
EGLScreenMESA screen;
EGLModeMESA mode;
EGLint numConfigs, count;
EGLBoolean b;
const GLubyte *bitmap;
EGLint screenAttribs[32];
EGLint i;
EGLDisplay d = eglGetDisplay(EGL_DEFAULT_DISPLAY);
assert(d);
if (!eglInitialize(d, &maj, &min)) {
printf("demo: eglInitialize failed\n");
exit(1);
}
printf("EGL version = %d.%d\n", maj, min);
printf("EGL_VENDOR = %s\n", eglQueryString(d, EGL_VENDOR));
if (!strstr(eglQueryString(d, EGL_EXTENSIONS),
"EGL_MESA_screen_surface")) {
printf("EGL_MESA_screen_surface is not supported\n");
exit(1);
}
eglGetConfigs(d, configs, 10, &numConfigs);
eglGetScreensMESA(d, &screen, 1, &count);
eglGetModesMESA(d, screen, &mode, 1, &count);
eglBindAPI(EGL_OPENGL_API);
ctx = eglCreateContext(d, configs[0], EGL_NO_CONTEXT, NULL);
if (ctx == EGL_NO_CONTEXT) {
printf("failed to create context\n");
return 0;
}
i = 0;
screenAttribs[i++] = EGL_WIDTH;
eglGetModeAttribMESA(d, mode, EGL_WIDTH, &screenAttribs[i++]);
screenAttribs[i++] = EGL_HEIGHT;
eglGetModeAttribMESA(d, mode, EGL_HEIGHT, &screenAttribs[i++]);
screenAttribs[i] = EGL_NONE;
screen_surf = eglCreateScreenSurfaceMESA(d, configs[0], screenAttribs);
if (screen_surf == EGL_NO_SURFACE) {
printf("failed to create screen surface\n");
return 0;
}
eglShowScreenSurfaceMESA(d, screen, screen_surf, mode);
b = eglMakeCurrent(d, screen_surf, screen_surf, ctx);
if (!b) {
printf("make current failed\n");
return 0;
}
glViewport(0, 0, 1024, 768);
Init();
Reshape(1024, 768);
/* some drivers crash when rendering to front buffer */
#if 0
glDrawBuffer( GL_FRONT );
glClearColor( 0, 1.0, 0, 1);
glClear( GL_COLOR_BUFFER_BIT );
#endif
doubleBuffer = 1;
glDrawBuffer( GL_BACK );
Draw(d, screen_surf);
sleep(2);
/* TODO EGL_KHR_lock_surface */
bitmap = NULL;
if (bitmap)
write_ppm("dump.ppm", bitmap, 1024, 768);
eglDestroySurface(d, screen_surf);
eglDestroyContext(d, ctx);
eglTerminate(d);
return 0;
}