1 files changed, 2 insertions, 0 deletions
diff --git a/image/bitmap.h b/image/bitmap.h
index 052a3a4f4..0c06f836f 100644
--- a/image/bitmap.h
+++ b/image/bitmap.h
@@ -26,6 +26,8 @@ struct content;
 struct bitmap;
 
 struct bitmap *bitmap_create(int width, int height);
+void bitmap_set_opaque(struct bitmap *bitmap, bool opaque);
+bool bitmap_test_opaque(struct bitmap *bitmap);
 char *bitmap_get_buffer(struct bitmap *bitmap);
 size_t bitmap_get_rowstride(struct bitmap *bitmap);
 void bitmap_destroy(struct bitmap *bitmap);