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