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281 lines
6.9 KiB
281 lines
6.9 KiB
#include <assert.h>
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#include <drm_fourcc.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wlr/render/drm_format_set.h>
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#include <wlr/util/log.h>
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#include "render/drm_format_set.h"
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void wlr_drm_format_set_finish(struct wlr_drm_format_set *set) {
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for (size_t i = 0; i < set->len; ++i) {
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free(set->formats[i]);
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}
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free(set->formats);
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set->len = 0;
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set->capacity = 0;
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set->formats = NULL;
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}
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static struct wlr_drm_format **format_set_get_ref(struct wlr_drm_format_set *set,
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uint32_t format) {
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for (size_t i = 0; i < set->len; ++i) {
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if (set->formats[i]->format == format) {
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return &set->formats[i];
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}
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}
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return NULL;
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}
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const struct wlr_drm_format *wlr_drm_format_set_get(
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const struct wlr_drm_format_set *set, uint32_t format) {
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struct wlr_drm_format **ptr =
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format_set_get_ref((struct wlr_drm_format_set *)set, format);
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return ptr ? *ptr : NULL;
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}
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bool wlr_drm_format_set_has(const struct wlr_drm_format_set *set,
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uint32_t format, uint64_t modifier) {
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const struct wlr_drm_format *fmt = wlr_drm_format_set_get(set, format);
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if (!fmt) {
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return false;
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}
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return wlr_drm_format_has(fmt, modifier);
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}
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bool wlr_drm_format_set_add(struct wlr_drm_format_set *set, uint32_t format,
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uint64_t modifier) {
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assert(format != DRM_FORMAT_INVALID);
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struct wlr_drm_format **ptr = format_set_get_ref(set, format);
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if (ptr) {
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return wlr_drm_format_add(ptr, modifier);
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}
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struct wlr_drm_format *fmt = wlr_drm_format_create(format);
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if (!fmt) {
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return false;
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}
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if (!wlr_drm_format_add(&fmt, modifier)) {
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return false;
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}
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if (set->len == set->capacity) {
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size_t new = set->capacity ? set->capacity * 2 : 4;
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struct wlr_drm_format **tmp = realloc(set->formats,
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sizeof(set->formats[0]) * new);
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if (!tmp) {
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wlr_log_errno(WLR_ERROR, "Allocation failed");
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free(fmt);
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return false;
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}
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set->capacity = new;
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set->formats = tmp;
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}
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set->formats[set->len++] = fmt;
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return true;
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}
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struct wlr_drm_format *wlr_drm_format_create(uint32_t format) {
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size_t capacity = 4;
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struct wlr_drm_format *fmt =
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calloc(1, sizeof(*fmt) + sizeof(fmt->modifiers[0]) * capacity);
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if (!fmt) {
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wlr_log_errno(WLR_ERROR, "Allocation failed");
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return NULL;
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}
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fmt->format = format;
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fmt->capacity = capacity;
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return fmt;
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}
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bool wlr_drm_format_has(const struct wlr_drm_format *fmt, uint64_t modifier) {
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for (size_t i = 0; i < fmt->len; ++i) {
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if (fmt->modifiers[i] == modifier) {
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return true;
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}
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}
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return false;
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}
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bool wlr_drm_format_add(struct wlr_drm_format **fmt_ptr, uint64_t modifier) {
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struct wlr_drm_format *fmt = *fmt_ptr;
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if (wlr_drm_format_has(fmt, modifier)) {
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return true;
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}
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if (fmt->len == fmt->capacity) {
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size_t capacity = fmt->capacity ? fmt->capacity * 2 : 4;
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fmt = realloc(fmt, sizeof(*fmt) + sizeof(fmt->modifiers[0]) * capacity);
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if (!fmt) {
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wlr_log_errno(WLR_ERROR, "Allocation failed");
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return false;
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}
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fmt->capacity = capacity;
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*fmt_ptr = fmt;
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}
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fmt->modifiers[fmt->len++] = modifier;
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return true;
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}
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struct wlr_drm_format *wlr_drm_format_dup(const struct wlr_drm_format *format) {
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assert(format->len <= format->capacity);
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size_t format_size = sizeof(struct wlr_drm_format) +
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format->capacity * sizeof(format->modifiers[0]);
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struct wlr_drm_format *duped_format = malloc(format_size);
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if (duped_format == NULL) {
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return NULL;
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}
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memcpy(duped_format, format, format_size);
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return duped_format;
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}
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bool wlr_drm_format_set_copy(struct wlr_drm_format_set *dst, const struct wlr_drm_format_set *src) {
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struct wlr_drm_format **formats = malloc(src->len * sizeof(formats[0]));
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if (formats == NULL) {
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return false;
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}
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struct wlr_drm_format_set out = {
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.len = 0,
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.capacity = src->len,
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.formats = formats,
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};
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size_t i;
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for (i = 0; i < src->len; i++) {
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out.formats[out.len] = wlr_drm_format_dup(src->formats[i]);
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if (out.formats[out.len] == NULL) {
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wlr_drm_format_set_finish(&out);
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return false;
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}
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out.len++;
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}
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*dst = out;
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return true;
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}
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struct wlr_drm_format *wlr_drm_format_intersect(
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const struct wlr_drm_format *a, const struct wlr_drm_format *b) {
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assert(a->format == b->format);
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size_t format_cap = a->len < b->len ? a->len : b->len;
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size_t format_size = sizeof(struct wlr_drm_format) +
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format_cap * sizeof(a->modifiers[0]);
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struct wlr_drm_format *format = calloc(1, format_size);
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if (format == NULL) {
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wlr_log_errno(WLR_ERROR, "Allocation failed");
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return NULL;
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}
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format->format = a->format;
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format->capacity = format_cap;
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for (size_t i = 0; i < a->len; i++) {
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for (size_t j = 0; j < b->len; j++) {
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if (a->modifiers[i] == b->modifiers[j]) {
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assert(format->len < format->capacity);
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format->modifiers[format->len] = a->modifiers[i];
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format->len++;
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break;
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}
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}
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}
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// If the intersection is empty, then the formats aren't compatible with
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// each other.
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if (format->len == 0) {
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free(format);
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return NULL;
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}
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return format;
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}
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bool wlr_drm_format_set_intersect(struct wlr_drm_format_set *dst,
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const struct wlr_drm_format_set *a, const struct wlr_drm_format_set *b) {
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struct wlr_drm_format_set out = {0};
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out.capacity = a->len < b->len ? a->len : b->len;
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out.formats = calloc(out.capacity, sizeof(struct wlr_drm_format *));
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if (out.formats == NULL) {
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wlr_log_errno(WLR_ERROR, "Allocation failed");
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return false;
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}
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for (size_t i = 0; i < a->len; i++) {
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for (size_t j = 0; j < b->len; j++) {
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if (a->formats[i]->format == b->formats[j]->format) {
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// When the two formats have no common modifier, keep
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// intersecting the rest of the formats: they may be compatible
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// with each other
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struct wlr_drm_format *format =
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wlr_drm_format_intersect(a->formats[i], b->formats[j]);
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if (format != NULL) {
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out.formats[out.len] = format;
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out.len++;
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}
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break;
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}
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}
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}
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if (out.len == 0) {
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wlr_drm_format_set_finish(&out);
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return false;
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}
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wlr_drm_format_set_finish(dst);
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*dst = out;
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return true;
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}
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static bool drm_format_set_extend(struct wlr_drm_format_set *dst,
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const struct wlr_drm_format_set *src) {
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for (size_t i = 0; i < src->len; i++) {
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struct wlr_drm_format *format = src->formats[i];
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for (size_t j = 0; j < format->len; j++) {
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if (!wlr_drm_format_set_add(dst, format->format, format->modifiers[j])) {
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wlr_log_errno(WLR_ERROR, "Adding format/modifier to set failed");
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return false;
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}
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}
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}
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return true;
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}
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bool wlr_drm_format_set_union(struct wlr_drm_format_set *dst,
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const struct wlr_drm_format_set *a, const struct wlr_drm_format_set *b) {
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struct wlr_drm_format_set out = {0};
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out.capacity = a->len + b->len;
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out.formats = calloc(out.capacity, sizeof(struct wlr_drm_format *));
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if (out.formats == NULL) {
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wlr_log_errno(WLR_ERROR, "Allocation failed");
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return false;
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}
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// Add both a and b sets into out
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if (!drm_format_set_extend(&out, a)) {
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return false;
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}
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if (!drm_format_set_extend(&out, b)) {
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return false;
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}
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wlr_drm_format_set_finish(dst);
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*dst = out;
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return true;
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}
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