backend: do partial updates

Although the functionality is not implemented by any backends yet. Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
2019-07-26 00:00:51 +01:00
parent f86d6b7cbd
commit 06dba4b196
3 changed files with 62 additions and 26 deletions
--- a/src/win.h
+++ b/src/win.h
@ -169,6 +169,8 @@ struct managed_win {
 	void *shadow_image;
 	/// Pointer to the next higher window to paint.
 	struct managed_win *prev_trans;
+	/// Number of windows above this window
+	int stacking_rank;
 	// TODO rethink reg_ignore

 	// Core members