output-layer: add cropping support

Add a src_box state field. Use the SRC_* KMS props in the DRM
backend, reject the layers in the Wayland backend (for now, we can
support it later via viewporter).

1 files changed, 3 insertions, 0 deletions

diff --git a/include/wlr/types/wlr_output_layer.h b/include/wlr/types/wlr_output_layer.h
index 8bcd5a27..4e28d559 100644
--- a/include/wlr/types/wlr_output_layer.h
+++ b/include/wlr/types/wlr_output_layer.h
@@ -52,6 +52,7 @@ struct wlr_output_layer {
 
 	// private state
 
+	struct wlr_fbox src_box;
 	struct wlr_box dst_box;
 };
 
@@ -63,6 +64,8 @@ struct wlr_output_layer_state {
 
 	// Buffer to display, or NULL to disable the layer
 	struct wlr_buffer *buffer;
+	// Source box, leave empty to use the whole buffer
+	struct wlr_fbox src_box;
 	// Destination box in output-buffer-local coordinates
 	struct wlr_box dst_box;