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render/drm_format_set: introduce wlr_drm_format_intersect

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Intersects modifiers from two wlr_drm_format structs. If either format
doesn't support modifiers, the resulting format won't support modifiers.
This commit is contained in:
Simon Ser 2020-11-25 15:58:37 +01:00 • committed by Ilia Bozhinov
parent 237c2cf2fb
commit 82443ea46b
2 changed files with 45 additions and 0 deletions
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9
include/render/drm_format_set.h
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@ -4,5 +4,14 @@
#include <wlr/render/drm_format_set.h>
struct wlr_drm_format *wlr_drm_format_dup(const struct wlr_drm_format *format);
/**
* Intersect modifiers for two DRM formats.
*
* Both arguments must have the same format field. If the formats aren't
* compatible, NULL is returned. If either format doesn't support any modifier,
* a format that doesn't support any modifier is returned.
*/
struct wlr_drm_format *wlr_drm_format_intersect(
const struct wlr_drm_format *a, const struct wlr_drm_format *b);
#endif