buffer: Make wlr_buffer_is_opaque public

It's useful for compositors.

include/types/wlr_buffer.h

@@ -57,7 +57,7 @@ bool dmabuf_buffer_drop(struct wlr_dmabuf_buffer *buffer);
  * reverse is not true: false may be returned in cases where the buffer is fully
  * opaque.
  */
-bool buffer_is_opaque(struct wlr_buffer *buffer);
+bool wlr_buffer_is_opaque(struct wlr_buffer *buffer);
 
 /**
  * Creates a struct wlr_client_buffer from a given struct wlr_buffer by creating

types/buffer/buffer.c

@@ -107,7 +107,7 @@ bool wlr_buffer_get_shm(struct wlr_buffer *buffer,
 	return buffer->impl->get_shm(buffer, attribs);
 }
 
-bool buffer_is_opaque(struct wlr_buffer *buffer) {
+bool wlr_buffer_is_opaque(struct wlr_buffer *buffer) {
 	void *data;
 	uint32_t format;
 	size_t stride;

types/scene/wlr_scene.c

@@ -781,7 +781,7 @@ static void scene_buffer_set_buffer(struct wlr_scene_buffer *scene_buffer,
 	scene_buffer->buffer = wlr_buffer_lock(buffer);
 	scene_buffer->buffer_width = buffer->width;
 	scene_buffer->buffer_height = buffer->height;
-	scene_buffer->buffer_is_opaque = buffer_is_opaque(buffer);
+	scene_buffer->buffer_is_opaque = wlr_buffer_is_opaque(buffer);
 
 	scene_buffer->buffer_release.notify = scene_buffer_handle_buffer_release;
 	wl_signal_add(&buffer->events.release, &scene_buffer->buffer_release);

types/wlr_compositor.c

@@ -415,7 +415,7 @@ static void surface_apply_damage(struct wlr_surface *surface) {
 		return;
 	}
 
-	surface->opaque = buffer_is_opaque(surface->current.buffer);
+	surface->opaque = wlr_buffer_is_opaque(surface->current.buffer);
 
 	if (surface->buffer != NULL) {
 		if (wlr_client_buffer_apply_damage(surface->buffer,