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, 10 insertions, 3 deletions

diff --git a/include/wlr/render.h b/include/wlr/render.h
index 5027064d..00088b52 100644
--- a/include/wlr/render.h
+++ b/include/wlr/render.h
@@ -52,10 +52,17 @@ const enum wl_shm_format *wlr_renderer_get_formats(
 bool wlr_renderer_buffer_is_drm(struct wlr_renderer *renderer,
 	struct wl_resource *buffer);
 /**
- * Reads pixels and stores them in out_data as ARGB8888.
+ * Reads out of pixels of the currently bound surface into data. `stride` is in
+ * bytes.
  */
-void wlr_renderer_read_pixels(struct wlr_renderer *r, int x, int y,
-	int width, int height, void *out_data);
+bool wlr_renderer_read_pixels(struct wlr_renderer *r, 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);
+/**
+ * Checks if a format is supported.
+ */
+bool wlr_renderer_format_supported(struct wlr_renderer *r,
+	enum wl_shm_format fmt);
 /**
  * Destroys this wlr_renderer. Textures must be destroyed separately.
  */