Add backend_info_t::buffer_age
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
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@ -134,6 +134,12 @@ typedef struct backend_info {
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bool (*is_frame_transparent)(void *backend_data, win *w, void *win_data)
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__attribute__((nonnull(1, 2)));
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/// Get the age of the buffer content we are currently rendering ontop
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/// of. The buffer that has just been `present`ed has a buffer age of 1.
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/// Everytime `present` is called, buffers get older. Return -1 if the
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/// buffer is empty.
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int (*buffer_age)(void *backend_data, session_t *);
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// =========== Hooks ============
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/// Let the backend hook into the event handling queue
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} backend_info_t;
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@ -144,4 +150,6 @@ extern backend_info_t *backend_list[];
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bool default_is_win_transparent(void *, win *, void *);
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bool default_is_frame_transparent(void *, win *, void *);
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void paint_all_new(session_t *ps, region_t *region, win *const t);
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void paint_all_new(session_t *ps, region_t *region, win *const t) attr_nonnull(1);
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// vim: set noet sw=8 ts=8 :
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