wlr_drm_format: Rework wlr_drm_format_intersect

Now it takes a reference to a destination format

1 files changed, 3 insertions, 2 deletions

diff --git a/include/render/drm_format_set.h b/include/render/drm_format_set.h
index 1ffc2a90..ea192a50 100644
--- a/include/render/drm_format_set.h
+++ b/include/render/drm_format_set.h
@@ -8,13 +8,14 @@ bool wlr_drm_format_has(const struct wlr_drm_format *fmt, uint64_t modifier);
 bool wlr_drm_format_add(struct wlr_drm_format *fmt, uint64_t modifier);
 bool wlr_drm_format_copy(struct wlr_drm_format *dst, const struct wlr_drm_format *src);
 /**
- * Intersect modifiers for two DRM formats.
+ * Intersect modifiers for two DRM formats. The `dst` must be zeroed or initialized
+ * with other state being replaced.
  *
  * 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(
+bool wlr_drm_format_intersect(struct wlr_drm_format *dst,
 	const struct wlr_drm_format *a, const struct wlr_drm_format *b);
 
 bool wlr_drm_format_set_copy(struct wlr_drm_format_set *dst, const struct wlr_drm_format_set *src);