backend_common: fix shadow generation with opacity

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
2019-03-04 22:58:11 +00:00
parent 3ab4107fda
commit a2ae36c1d6
5 changed files with 9 additions and 9 deletions
--- a/src/backend/backend.h
+++ b/src/backend/backend.h
@@ -98,7 +98,7 @@ struct backend_operations {

 	/// Create a shadow image based on the parameters
 	void *(*render_shadow)(backend_t *backend_data, int width, int height,
-	                       const conv *kernel, double r, double g, double b);
+	                       const conv *kernel, double r, double g, double b, double a);

 	// ============ Resource management ===========