Backport screenshooter fixes from the renderer redesign v1

This backports some changes to #319 to fix the screenshooter data
format. This also adds wlr_backend_get_renderer which will be
useful to support multiple renderers.

1 files changed, 6 insertions, 2 deletions

diff --git a/include/wlr/render/interface.h b/include/wlr/render/interface.h
index bbc5acb4..bb337409 100644
--- a/include/wlr/render/interface.h
+++ b/include/wlr/render/interface.h
@@ -28,8 +28,12 @@ struct wlr_renderer_impl {
 		struct wlr_renderer *renderer, size_t *len);
 	bool (*buffer_is_drm)(struct wlr_renderer *renderer,
 		struct wl_resource *buffer);
-	void (*read_pixels)(struct wlr_renderer *renderer, int x, int y, int width,
-		int height, void *out_data);
+	bool (*read_pixels)(struct wlr_renderer *renderer, enum wl_shm_format fmt,
+		uint32_t stride, uint32_t width, uint32_t height,
+		uint32_t src_x, uint32_t src_y, uint32_t dst_x, uint32_t dst_y,
+		void *data);
+	bool (*format_supported)(struct wlr_renderer *renderer,
+		enum wl_shm_format fmt);
 	void (*destroy)(struct wlr_renderer *renderer);
 };