add double buffering

1 files changed, 2 insertions, 0 deletions

diff --git a/drw.h b/drw.h
index 578fd2a..821e80e 100644
--- a/drw.h
+++ b/drw.h
@@ -11,6 +11,7 @@
 /* type definitions */
 typedef struct {
 	uint32_t *data;
+	uint32_t *buffer_data;
 	unsigned width;
 	unsigned height;
 	unsigned size;
@@ -61,6 +62,7 @@ typedef struct {
 /* exported functions */
 Canvas* create_drw(struct wl_shm *shm, unsigned width, unsigned height);
 void free_drw(Canvas *canvas);
+void push_buffer(Canvas *canvas);
 
 void draw_rect(Canvas *canvas, unsigned x, unsigned y, unsigned width, unsigned height, uint32_t color);
 void draw_point(Canvas *canvas, unsigned x, unsigned y, uint32_t color);