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Fix damage tracking for rotated surfaces

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It was broken because the damage extents were rotated about its
own center, not about the center of the surface.

This adds a new wlr_region_rotated_bounds that rotates regions.
This allows us to have only one code path (for both non-rotated
views and rotated views) and optimizes rendering for rotated
views.
This commit is contained in:
emersion 2018-03-26 15:31:08 -04:00
parent bcb74c2c78
commit 4555fc8a54
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GPG key ID: 0FDE7BE0E88F5E48
4 changed files with 76 additions and 26 deletions
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7
include/wlr/util/region.h
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@ -26,4 +26,11 @@ void wlr_region_transform(pixman_region32_t *dst, pixman_region32_t *src,
void wlr_region_expand(pixman_region32_t *dst, pixman_region32_t *src,
int distance);
/*
* Builds the smallest possible region that contains the region rotated about
* the point (ox, oy).
*/
void wlr_region_rotated_bounds(pixman_region32_t *dst, pixman_region32_t *src,
float rotation, int ox, int oy);
#endif