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draw_bmp: make another small guarantee to users

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Mostly self-evident.
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wm4 2020-05-13 22:46:29 +02:00
parent b36484063f
commit 97706a2aec
1 changed files with 2 additions and 0 deletions
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sub/draw_bmp.h
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@ -31,6 +31,8 @@ char *mp_draw_sub_get_dbg_info(struct mp_draw_sub_cache *c);
// rectangles are regions that were changed since the last call. This function
// always makes the act region a subset of the mod region. Rectangles within a
// list never overlap with rectangles within the same list.
// If num_mod_rcs==0 is returned, this function guarantees that the act region
// did not change since the last call.
// If the user-provided lists are too small (max_*_rcs too small), multiple
// rectangles are merged until they fit in the list.
// You can pass max_act_rcs=0, which implies you render the whole overlay.