compositor, clients: apply wl_surface.frame on commit

Apply wl_surface.frame request only on the next wl_surface.commit
according to the new protocol.

This makes it explicit, which repaint actually triggered the frame
callback, since commit schedules a repaint. Otherwise, something causing
a repaint before a commit could trigger the frame callback too early.

Ensure all demo clients send commit after wl_surface.frame. Note, that
GL apps rely on eglSwapBuffers() sending commit. In toytoolkit, it is
assumed that window_flush() always does a commit.

compositor-wayland assumes renderer->repaint_output does a commit.

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>

clients/simple-egl.c

@@ -410,10 +410,10 @@ redraw(void *data, struct wl_callback *callback, uint32_t time)
 		wl_region_destroy(region);
 	}
 
-	eglSwapBuffers(window->display->egl.dpy, window->egl_surface);
-
 	window->callback = wl_surface_frame(window->surface);
 	wl_callback_add_listener(window->callback, &frame_listener, window);
+
+	eglSwapBuffers(window->display->egl.dpy, window->egl_surface);
 }
 
 static const struct wl_callback_listener frame_listener = {

clients/simple-shm.c

@@ -217,13 +217,13 @@ redraw(void *data, struct wl_callback *callback, uint32_t time)
 	paint_pixels(window->shm_data, 20, window->width, window->height, time);
 	wl_surface_damage(window->surface,
 			  20, 20, window->width - 40, window->height - 40);
-	wl_surface_commit(window->surface);
 
 	if (callback)
 		wl_callback_destroy(callback);
 
 	window->callback = wl_surface_frame(window->surface);
 	wl_callback_add_listener(window->callback, &frame_listener, window);
+	wl_surface_commit(window->surface);
 }
 
 static const struct wl_callback_listener frame_listener = {

clients/window.c

@@ -2670,14 +2670,14 @@ pointer_surface_frame_callback(void *data, struct wl_callback *callback,
 	else
 		i = wl_cursor_frame(cursor, time - input->cursor_anim_start);
 
+	if (cursor->image_count > 1) {
+		input->cursor_frame_cb =
+			wl_surface_frame(input->pointer_surface);
+		wl_callback_add_listener(input->cursor_frame_cb,
+					 &pointer_surface_listener, input);
+	}
+
 	input_set_pointer_image_index(input, i);
-
-	if (cursor->image_count == 1)
-		return;
-
-	input->cursor_frame_cb = wl_surface_frame(input->pointer_surface);
-	wl_callback_add_listener(input->cursor_frame_cb,
-				 &pointer_surface_listener, input);
 }
 
 static const struct wl_callback_listener pointer_surface_listener = {
@@ -2973,12 +2973,12 @@ idle_redraw(struct task *task, uint32_t events)
 
 	window_create_surface(window);
 	widget_redraw(window->widget);
-	window_flush(window);
 	window->redraw_needed = 0;
 	wl_list_init(&window->redraw_task.link);
 
 	window->frame_cb = wl_surface_frame(window->surface);
 	wl_callback_add_listener(window->frame_cb, &listener, window);
+	window_flush(window);
 }
 
 void