mirror of
https://gitlab.freedesktop.org/wlroots/wlroots.git
synced 2025-11-03 09:01:40 -05:00
38ba5881a0
This new API allows buffer implementations to know when a user is actively accessing the buffer's underlying storage. This is important for the upcoming client-backed wlr_buffer implementation.
94 lines
3 KiB
C
94 lines
3 KiB
C
#include <assert.h>
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#include <stdlib.h>
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#include <wlr/util/log.h>
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#include <xf86drm.h>
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#include "backend/backend.h"
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#include "render/allocator.h"
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#include "render/gbm_allocator.h"
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#include "render/shm_allocator.h"
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#include "render/drm_dumb_allocator.h"
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#include "render/wlr_renderer.h"
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#include "types/wlr_buffer.h"
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void wlr_allocator_init(struct wlr_allocator *alloc,
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const struct wlr_allocator_interface *impl, uint32_t buffer_caps) {
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assert(impl && impl->destroy && impl->create_buffer);
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alloc->impl = impl;
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alloc->buffer_caps = buffer_caps;
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wl_signal_init(&alloc->events.destroy);
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}
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struct wlr_allocator *allocator_autocreate_with_drm_fd(
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struct wlr_backend *backend, struct wlr_renderer *renderer,
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int drm_fd) {
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uint32_t backend_caps = backend_get_buffer_caps(backend);
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uint32_t renderer_caps = renderer_get_render_buffer_caps(renderer);
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struct wlr_allocator *alloc = NULL;
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uint32_t gbm_caps = WLR_BUFFER_CAP_DMABUF;
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if ((backend_caps & gbm_caps) && (renderer_caps & gbm_caps)
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&& drm_fd != -1) {
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wlr_log(WLR_DEBUG, "Trying to create gbm allocator");
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if ((alloc = wlr_gbm_allocator_create(drm_fd)) != NULL) {
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return alloc;
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}
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wlr_log(WLR_DEBUG, "Failed to create gbm allocator");
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}
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uint32_t shm_caps = WLR_BUFFER_CAP_SHM | WLR_BUFFER_CAP_DATA_PTR;
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if ((backend_caps & shm_caps) && (renderer_caps & shm_caps)) {
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wlr_log(WLR_DEBUG, "Trying to create shm allocator");
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if ((alloc = wlr_shm_allocator_create()) != NULL) {
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return alloc;
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}
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wlr_log(WLR_DEBUG, "Failed to create shm allocator");
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}
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uint32_t drm_caps = WLR_BUFFER_CAP_DMABUF | WLR_BUFFER_CAP_DATA_PTR;
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if ((backend_caps & drm_caps) && (renderer_caps & drm_caps)
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&& drm_fd != -1) {
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wlr_log(WLR_DEBUG, "Trying to create drm dumb allocator");
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if ((alloc = wlr_drm_dumb_allocator_create(drm_fd)) != NULL) {
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return alloc;
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}
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wlr_log(WLR_DEBUG, "Failed to create drm dumb allocator");
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}
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wlr_log(WLR_ERROR, "Failed to create allocator");
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return NULL;
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}
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struct wlr_allocator *wlr_allocator_autocreate(struct wlr_backend *backend,
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struct wlr_renderer *renderer) {
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// Note, drm_fd may be negative if unavailable
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int drm_fd = wlr_backend_get_drm_fd(backend);
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return allocator_autocreate_with_drm_fd(backend, renderer, drm_fd);
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}
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void wlr_allocator_destroy(struct wlr_allocator *alloc) {
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if (alloc == NULL) {
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return;
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}
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wl_signal_emit(&alloc->events.destroy, NULL);
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alloc->impl->destroy(alloc);
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}
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struct wlr_buffer *wlr_allocator_create_buffer(struct wlr_allocator *alloc,
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int width, int height, const struct wlr_drm_format *format) {
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struct wlr_buffer *buffer =
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alloc->impl->create_buffer(alloc, width, height, format);
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if (buffer == NULL) {
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return NULL;
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}
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if (alloc->buffer_caps & WLR_BUFFER_CAP_DATA_PTR) {
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assert(buffer->impl->begin_data_ptr_access &&
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buffer->impl->end_data_ptr_access);
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}
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if (alloc->buffer_caps & WLR_BUFFER_CAP_DMABUF) {
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assert(buffer->impl->get_dmabuf);
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}
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if (alloc->buffer_caps & WLR_BUFFER_CAP_SHM) {
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assert(buffer->impl->get_shm);
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}
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return buffer;
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}
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