Use EGL_KHR_surfaceless_opengl

clients/gears.c

@@ -348,18 +348,10 @@ static struct gears *
 gears_create(struct display *display)
 {
 	const int x = 200, y = 200, width = 450, height = 500;
-	EGLint major, minor, count;
-	EGLConfig config;
+	EGLint major, minor;
 	struct gears *gears;
 	int i;
 
-	static const EGLint config_attribs[] = {
-		EGL_SURFACE_TYPE,		0,
-		EGL_NO_SURFACE_CAPABLE_MESA,	EGL_OPENGL_BIT,
-		EGL_RENDERABLE_TYPE,		EGL_OPENGL_BIT,
-		EGL_NONE
-	};
-
 	gears = malloc(sizeof *gears);
 	memset(gears, 0, sizeof *gears);
 	gears->d = display;
@@ -373,13 +365,10 @@ gears_create(struct display *display)
 	if (!eglInitialize(gears->display, &major, &minor))
 		die("failed to initialize display\n");
 
-	if (!eglChooseConfig(gears->display, config_attribs, &config, 1, &count) ||
-	    count == 0)
-		die("eglChooseConfig() failed\n");
-
 	eglBindAPI(EGL_OPENGL_API);
 
-	gears->context = eglCreateContext(gears->display, config, EGL_NO_CONTEXT, NULL);
+	gears->context = eglCreateContext(gears->display,
+					  NULL, EGL_NO_CONTEXT, NULL);
 	if (gears->context == NULL)
 		die("failed to create context\n");
 

clients/window.c

@@ -870,19 +870,11 @@ struct display *
 display_create(int *argc, char **argv[], const GOptionEntry *option_entries)
 {
 	struct display *d;
-	EGLint major, minor, count;
-	EGLConfig config;
+	EGLint major, minor;
 	int fd;
 	GOptionContext *context;
 	GError *error;
 
-	static const EGLint config_attribs[] = {
-		EGL_SURFACE_TYPE,		0,
-		EGL_NO_SURFACE_CAPABLE_MESA,	EGL_OPENGL_BIT,
-		EGL_RENDERABLE_TYPE,		EGL_OPENGL_BIT,
-		EGL_NONE
-	};
-
 	g_type_init();
 
 	context = g_option_context_new(NULL);
@@ -925,15 +917,9 @@ display_create(int *argc, char **argv[], const GOptionEntry *option_entries)
 		return NULL;
 	}
 
-	if (!eglChooseConfig(d->dpy, config_attribs, &config, 1, &count) ||
-	    count == 0) {
-		fprintf(stderr, "eglChooseConfig() failed\n");
-		return NULL;
-	}
-
 	eglBindAPI(EGL_OPENGL_API);
 
-	d->ctx = eglCreateContext(d->dpy, config, EGL_NO_CONTEXT, NULL);
+	d->ctx = eglCreateContext(d->dpy, NULL, EGL_NO_CONTEXT, NULL);
 	if (d->ctx == NULL) {
 		fprintf(stderr, "failed to create context\n");
 		return NULL;

compositor-drm.c

@@ -305,15 +305,8 @@ on_drm_input(int fd, uint32_t mask, void *data)
 static int
 init_egl(struct drm_compositor *ec, struct udev_device *device)
 {
-	EGLint major, minor, count;
-	EGLConfig config;
-
-	static const EGLint config_attribs[] = {
-		EGL_SURFACE_TYPE,		0,
-		EGL_NO_SURFACE_CAPABLE_MESA,	EGL_OPENGL_BIT,
-		EGL_RENDERABLE_TYPE,		EGL_OPENGL_BIT,
-		EGL_NONE
-	};
+	EGLint major, minor;
+	const char *extensions;
 
 	ec->base.base.device = strdup(udev_device_get_devnode(device));
 	ec->drm_fd = open(ec->base.base.device, O_RDWR);
@@ -335,16 +328,15 @@ init_egl(struct drm_compositor *ec, struct udev_device *device)
 		return -1;
 	}
 
-	if (!eglChooseConfig(ec->base.display,
-			     config_attribs, &config, 1, &count) ||
-	    count == 0) {
-		fprintf(stderr, "eglChooseConfig() failed\n");
+	extensions = eglQueryString(ec->base.display, EGL_EXTENSIONS);
+	if (!strstr(extensions, "EGL_KHR_surfaceless_opengl")) {
+		fprintf(stderr, "EGL_KHR_surfaceless_opengl not available\n");
 		return -1;
 	}
 
 	eglBindAPI(EGL_OPENGL_API);
 	ec->base.context = eglCreateContext(ec->base.display,
-					    config, EGL_NO_CONTEXT, NULL);
+					    NULL, EGL_NO_CONTEXT, NULL);
 	if (ec->base.context == NULL) {
 		fprintf(stderr, "failed to create context\n");
 		return -1;

compositor-x11.c

@@ -198,15 +198,8 @@ dri2_authenticate(struct x11_compositor *c)
 static int
 x11_compositor_init_egl(struct x11_compositor *c)
 {
-	EGLint major, minor, count;
-	EGLConfig config;
-
-	static const EGLint config_attribs[] = {
-		EGL_SURFACE_TYPE,		0,
-		EGL_NO_SURFACE_CAPABLE_MESA,	EGL_OPENGL_BIT,
-		EGL_RENDERABLE_TYPE,		EGL_OPENGL_BIT,
-		EGL_NONE
-	};
+	EGLint major, minor;
+	const char *extensions;
 
 	if (dri2_connect(c) < 0)
 		return -1;
@@ -233,16 +226,15 @@ x11_compositor_init_egl(struct x11_compositor *c)
 		return -1;
 	}
 
-	if (!eglChooseConfig(c->base.display,
-			     config_attribs, &config, 1, &count) ||
-	    count == 0) {
-		fprintf(stderr, "eglChooseConfig() failed\n");
+	extensions = eglQueryString(c->base.display, EGL_EXTENSIONS);
+	if (!strstr(extensions, "EGL_KHR_surfaceless_opengl")) {
+		fprintf(stderr, "EGL_KHR_surfaceless_opengl not available\n");
 		return -1;
 	}
 
 	eglBindAPI(EGL_OPENGL_API);
 	c->base.context = eglCreateContext(c->base.display,
-					   config, EGL_NO_CONTEXT, NULL);
+					   NULL, EGL_NO_CONTEXT, NULL);
 	if (c->base.context == NULL) {
 		fprintf(stderr, "failed to create context\n");
 		return -1;