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#include <assert.h>
#include <drm_fourcc.h>
#include <string.h>
#include <wlr/interfaces/wlr_buffer.h>
#include "render/pixel_format.h"
#include "types/wlr_buffer.h"
void wlr_buffer_init(struct wlr_buffer *buffer,
const struct wlr_buffer_impl *impl, int width, int height) {
assert(impl->destroy);
if (impl->begin_data_ptr_access || impl->end_data_ptr_access) {
assert(impl->begin_data_ptr_access && impl->end_data_ptr_access);
}
*buffer = (struct wlr_buffer){
.impl = impl,
.width = width,
.height = height,
};
wl_signal_init(&buffer->events.destroy);
wl_signal_init(&buffer->events.release);
wlr_addon_set_init(&buffer->addons);
}
void wlr_buffer_finish(struct wlr_buffer *buffer) {
wl_signal_emit_mutable(&buffer->events.destroy, NULL);
wlr_addon_set_finish(&buffer->addons);
assert(wl_list_empty(&buffer->events.destroy.listener_list));
assert(wl_list_empty(&buffer->events.release.listener_list));
}
static void buffer_consider_destroy(struct wlr_buffer *buffer) {
if (!buffer->dropped || buffer->n_locks > 0) {
return;
}
assert(!buffer->accessing_data_ptr);
buffer->impl->destroy(buffer);
}
void wlr_buffer_drop(struct wlr_buffer *buffer) {
if (buffer == NULL) {
return;
}
assert(!buffer->dropped);
buffer->dropped = true;
buffer_consider_destroy(buffer);
}
struct wlr_buffer *wlr_buffer_lock(struct wlr_buffer *buffer) {
buffer->n_locks++;
return buffer;
}
void wlr_buffer_unlock(struct wlr_buffer *buffer) {
if (buffer == NULL) {
return;
}
assert(buffer->n_locks > 0);
buffer->n_locks--;
if (buffer->n_locks == 0) {
wl_signal_emit_mutable(&buffer->events.release, NULL);
}
buffer_consider_destroy(buffer);
}
bool wlr_buffer_get_dmabuf(struct wlr_buffer *buffer,
struct wlr_dmabuf_attributes *attribs) {
if (!buffer->impl->get_dmabuf) {
return false;
}
return buffer->impl->get_dmabuf(buffer, attribs);
}
bool wlr_buffer_begin_data_ptr_access(struct wlr_buffer *buffer, uint32_t flags,
void **data, uint32_t *format, size_t *stride) {
assert(!buffer->accessing_data_ptr);
if (!buffer->impl->begin_data_ptr_access) {
return false;
}
if (!buffer->impl->begin_data_ptr_access(buffer, flags, data, format, stride)) {
return false;
}
buffer->accessing_data_ptr = true;
return true;
}
void wlr_buffer_end_data_ptr_access(struct wlr_buffer *buffer) {
assert(buffer->accessing_data_ptr);
buffer->impl->end_data_ptr_access(buffer);
buffer->accessing_data_ptr = false;
}
bool wlr_buffer_get_shm(struct wlr_buffer *buffer,
struct wlr_shm_attributes *attribs) {
if (!buffer->impl->get_shm) {
return false;
}
return buffer->impl->get_shm(buffer, attribs);
}
bool wlr_buffer_is_opaque(struct wlr_buffer *buffer) {
void *data;
uint32_t format;
size_t stride;
struct wlr_dmabuf_attributes dmabuf;
struct wlr_shm_attributes shm;
if (wlr_buffer_get_dmabuf(buffer, &dmabuf)) {
format = dmabuf.format;
} else if (wlr_buffer_get_shm(buffer, &shm)) {
format = shm.format;
} else if (wlr_buffer_begin_data_ptr_access(buffer,
WLR_BUFFER_DATA_PTR_ACCESS_READ, &data, &format, &stride)) {
bool opaque = false;
if (buffer->width == 1 && buffer->height == 1 && format == DRM_FORMAT_ARGB8888) {
// Special case for single-pixel-buffer-v1
const uint8_t *argb8888 = data; // little-endian byte order
opaque = argb8888[3] == 0xFF;
}
wlr_buffer_end_data_ptr_access(buffer);
if (opaque) {
return true;
}
} else {
return false;
}
return !pixel_format_has_alpha(format);
}
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