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Add backend_info_t::buffer_age 

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui 2019-01-08 21:31:52 +00:00
parent 3e475d00b3
commit 72e3468694
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1 changed files with 9 additions and 1 deletions
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10
src/backend/backend.h
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@ -134,6 +134,12 @@ typedef struct backend_info {
bool (*is_frame_transparent)(void *backend_data, win *w, void *win_data)
__attribute__((nonnull(1, 2)));
/// Get the age of the buffer content we are currently rendering ontop
/// of. The buffer that has just been `present`ed has a buffer age of 1.
/// Everytime `present` is called, buffers get older. Return -1 if the
/// buffer is empty.
int (*buffer_age)(void *backend_data, session_t *);
// =========== Hooks ============
/// Let the backend hook into the event handling queue
} backend_info_t;
@ -144,4 +150,6 @@ extern backend_info_t *backend_list[];
bool default_is_win_transparent(void *, win *, void *);
bool default_is_frame_transparent(void *, win *, void *);
void paint_all_new(session_t *ps, region_t *region, win *const t);
void paint_all_new(session_t *ps, region_t *region, win *const t) attr_nonnull(1);
// vim: set noet sw=8 ts=8 :