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Add union function for format sets

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This commit is contained in:
Austin Shafer 2022-07-22 17:16:41 -04:00
parent bf8ae8a036
commit ec37d55a5e
2 changed files with 48 additions and 0 deletions
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8
include/wlr/render/drm_format_set.h
View file

@ -72,4 +72,12 @@ bool wlr_drm_format_set_add(struct wlr_drm_format_set *set, uint32_t format,
bool wlr_drm_format_set_intersect(struct wlr_drm_format_set *dst,
const struct wlr_drm_format_set *a, const struct wlr_drm_format_set *b);
/**
* Unions DRM format set `a` and `b`, storing in the destination set
* `dst`.
*
* Returns false on failure.
*/
bool wlr_drm_format_set_union(struct wlr_drm_format_set *dst,
const struct wlr_drm_format_set *a, const struct wlr_drm_format_set *b);
#endif

40
render/drm_format_set.c
View file

@ -240,3 +240,43 @@ bool wlr_drm_format_set_intersect(struct wlr_drm_format_set *dst,
*dst = out;
return true;
}
static bool drm_format_set_extend(struct wlr_drm_format_set *dst,
const struct wlr_drm_format_set *src) {
for (size_t i = 0; i < src->len; i++) {
struct wlr_drm_format *format = src->formats[i];
for (size_t j = 0; j < format->len; j++) {
if (!wlr_drm_format_set_add(dst, format->format, format->modifiers[j])) {
wlr_log_errno(WLR_ERROR, "Adding format/modifier to set failed");
return false;
}
}
}
return true;
}
bool wlr_drm_format_set_union(struct wlr_drm_format_set *dst,
const struct wlr_drm_format_set *a, const struct wlr_drm_format_set *b) {
assert(dst != a && dst != b);
struct wlr_drm_format_set out = {0};
out.capacity = a->len + b->len;
out.formats = calloc(out.capacity, sizeof(struct wlr_drm_format *));
if (out.formats == NULL) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
return false;
}
// Add both a and b sets into out
if (!drm_format_set_extend(&out, a)) {
return false;
}
if (!drm_format_set_extend(&out, b)) {
return false;
}
*dst = out;
return true;
}