wlroots-hyprland/render/drm_format_set.c

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#include <assert.h>
#include <drm_fourcc.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <wlr/render/drm_format_set.h>
#include <wlr/util/log.h>
#include "render/drm_format_set.h"
void wlr_drm_format_finish(struct wlr_drm_format *format) {
if (!format) {
return;
}
free(format->modifiers);
}
void wlr_drm_format_set_finish(struct wlr_drm_format_set *set) {
for (size_t i = 0; i < set->len; ++i) {
wlr_drm_format_finish(&set->formats[i]);
}
free(set->formats);
set->len = 0;
set->capacity = 0;
set->formats = NULL;
}
static struct wlr_drm_format *format_set_get(const struct wlr_drm_format_set *set,
uint32_t format) {
for (size_t i = 0; i < set->len; ++i) {
if (set->formats[i].format == format) {
return &set->formats[i];
}
}
return NULL;
}
const struct wlr_drm_format *wlr_drm_format_set_get(
const struct wlr_drm_format_set *set, uint32_t format) {
return format_set_get(set, format);
}
bool wlr_drm_format_set_has(const struct wlr_drm_format_set *set,
uint32_t format, uint64_t modifier) {
const struct wlr_drm_format *fmt = wlr_drm_format_set_get(set, format);
if (!fmt) {
return false;
}
return wlr_drm_format_has(fmt, modifier);
}
bool wlr_drm_format_set_add(struct wlr_drm_format_set *set, uint32_t format,
uint64_t modifier) {
assert(format != DRM_FORMAT_INVALID);
struct wlr_drm_format *existing = format_set_get(set, format);
if (existing) {
return wlr_drm_format_add(existing, modifier);
}
struct wlr_drm_format fmt;
wlr_drm_format_init(&fmt, format);
if (!wlr_drm_format_add(&fmt, modifier)) {
wlr_drm_format_finish(&fmt);
return false;
}
if (set->len == set->capacity) {
size_t capacity = set->capacity ? set->capacity * 2 : 4;
struct wlr_drm_format *fmts = realloc(set->formats, sizeof(*fmts) * capacity);
if (!fmts) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
wlr_drm_format_finish(&fmt);
return false;
}
set->capacity = capacity;
set->formats = fmts;
}
set->formats[set->len++] = fmt;
return true;
}
void wlr_drm_format_init(struct wlr_drm_format *fmt, uint32_t format) {
*fmt = (struct wlr_drm_format){
.format = format,
};
}
bool wlr_drm_format_has(const struct wlr_drm_format *fmt, uint64_t modifier) {
for (size_t i = 0; i < fmt->len; ++i) {
if (fmt->modifiers[i] == modifier) {
return true;
}
}
return false;
}
bool wlr_drm_format_add(struct wlr_drm_format *fmt, uint64_t modifier) {
if (wlr_drm_format_has(fmt, modifier)) {
return true;
}
if (fmt->len == fmt->capacity) {
size_t capacity = fmt->capacity ? fmt->capacity * 2 : 4;
uint64_t *new_modifiers = realloc(fmt->modifiers, sizeof(*fmt->modifiers) * capacity);
if (!new_modifiers) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
return false;
}
fmt->capacity = capacity;
fmt->modifiers = new_modifiers;
}
fmt->modifiers[fmt->len++] = modifier;
return true;
}
bool wlr_drm_format_copy(struct wlr_drm_format *dst, const struct wlr_drm_format *src) {
assert(src->len <= src->capacity);
uint64_t *modifiers = malloc(sizeof(*modifiers) * src->len);
if (!modifiers) {
return false;
}
memcpy(modifiers, src->modifiers, sizeof(*modifiers) * src->len);
wlr_drm_format_finish(dst);
dst->capacity = src->len;
dst->len = src->len;
dst->format = src->format;
dst->modifiers = modifiers;
return true;
}
bool wlr_drm_format_set_copy(struct wlr_drm_format_set *dst, const struct wlr_drm_format_set *src) {
struct wlr_drm_format *formats = malloc(src->len * sizeof(formats[0]));
if (formats == NULL) {
return false;
}
struct wlr_drm_format_set out = {
.len = 0,
.capacity = src->len,
.formats = formats,
};
size_t i;
for (i = 0; i < src->len; i++) {
out.formats[out.len] = (struct wlr_drm_format){0};
if (!wlr_drm_format_copy(&out.formats[out.len], &src->formats[i])) {
wlr_drm_format_set_finish(&out);
return false;
}
out.len++;
}
*dst = out;
return true;
}
bool wlr_drm_format_intersect(struct wlr_drm_format *dst,
const struct wlr_drm_format *a, const struct wlr_drm_format *b) {
assert(a->format == b->format);
size_t capacity = a->len < b->len ? a->len : b->len;
uint64_t *modifiers = malloc(sizeof(*modifiers) * capacity);
if (!modifiers) {
return false;
}
struct wlr_drm_format fmt = {
.capacity = capacity,
.len = 0,
.modifiers = modifiers,
.format = a->format,
};
for (size_t i = 0; i < a->len; i++) {
for (size_t j = 0; j < b->len; j++) {
if (a->modifiers[i] == b->modifiers[j]) {
assert(fmt.len < fmt.capacity);
fmt.modifiers[fmt.len++] = a->modifiers[i];
break;
}
}
}
wlr_drm_format_finish(dst);
*dst = fmt;
return true;
}
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) {
struct wlr_drm_format_set out = {0};
out.capacity = a->len < b->len ? a->len : b->len;
out.formats = malloc(sizeof(*out.formats) * out.capacity);
if (out.formats == NULL) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
return false;
}
for (size_t i = 0; i < a->len; i++) {
for (size_t j = 0; j < b->len; j++) {
if (a->formats[i].format == b->formats[j].format) {
// When the two formats have no common modifier, keep
// intersecting the rest of the formats: they may be compatible
// with each other
out.formats[out.len] = (struct wlr_drm_format){0};
if (!wlr_drm_format_intersect(&out.formats[out.len],
&a->formats[i], &b->formats[j])) {
wlr_drm_format_set_finish(&out);
return false;
}
if (out.formats[out.len].len == 0) {
wlr_drm_format_finish(&out.formats[out.len]);
} else {
out.len++;
}
break;
}
}
}
if (out.len == 0) {
wlr_drm_format_set_finish(&out);
return false;
}
wlr_drm_format_set_finish(dst);
*dst = out;
return true;
}
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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];
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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) {
struct wlr_drm_format_set out = {0};
out.capacity = a->len + b->len;
out.formats = malloc(sizeof(*out.formats) * out.capacity);
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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) ||
!drm_format_set_extend(&out, b)) {
wlr_drm_format_set_finish(&out);
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return false;
}
wlr_drm_format_set_finish(dst);
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*dst = out;
return true;
}