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#include <assert.h>
#include <stdlib.h>
#include <wlr/util/log.h>
#include <xf86drm.h>
#include "backend/backend.h"
#include "render/allocator.h"
#include "render/gbm_allocator.h"
#include "render/shm_allocator.h"
#include "render/drm_dumb_allocator.h"
#include "render/wlr_renderer.h"
void wlr_allocator_init(struct wlr_allocator *alloc,
const struct wlr_allocator_interface *impl, uint32_t buffer_caps) {
assert(impl && impl->destroy && impl->create_buffer);
alloc->impl = impl;
alloc->buffer_caps = buffer_caps;
wl_signal_init(&alloc->events.destroy);
}
struct wlr_allocator *allocator_autocreate_with_drm_fd(
struct wlr_backend *backend, struct wlr_renderer *renderer,
int drm_fd) {
uint32_t backend_caps = backend_get_buffer_caps(backend);
uint32_t renderer_caps = renderer_get_render_buffer_caps(renderer);
struct wlr_allocator *alloc = NULL;
uint32_t gbm_caps = WLR_BUFFER_CAP_DMABUF;
if ((backend_caps & gbm_caps) && (renderer_caps & gbm_caps)
&& drm_fd != -1) {
wlr_log(WLR_DEBUG, "Trying to create gbm allocator");
if ((alloc = wlr_gbm_allocator_create(drm_fd)) != NULL) {
return alloc;
}
wlr_log(WLR_DEBUG, "Failed to create gbm allocator");
}
uint32_t shm_caps = WLR_BUFFER_CAP_SHM | WLR_BUFFER_CAP_DATA_PTR;
if ((backend_caps & shm_caps) && (renderer_caps & shm_caps)) {
wlr_log(WLR_DEBUG, "Trying to create shm allocator");
if ((alloc = wlr_shm_allocator_create()) != NULL) {
return alloc;
}
wlr_log(WLR_DEBUG, "Failed to create shm allocator");
}
uint32_t drm_caps = WLR_BUFFER_CAP_DMABUF | WLR_BUFFER_CAP_DATA_PTR;
if ((backend_caps & drm_caps) && (renderer_caps & drm_caps)
&& drm_fd != -1) {
wlr_log(WLR_DEBUG, "Trying to create drm dumb allocator");
if ((alloc = wlr_drm_dumb_allocator_create(drm_fd)) != NULL) {
return alloc;
}
wlr_log(WLR_DEBUG, "Failed to create drm dumb allocator");
}
wlr_log(WLR_ERROR, "Failed to create allocator");
return NULL;
}
struct wlr_allocator *wlr_allocator_autocreate(struct wlr_backend *backend,
struct wlr_renderer *renderer) {
// Note, drm_fd may be negative if unavailable
int drm_fd = wlr_backend_get_drm_fd(backend);
return allocator_autocreate_with_drm_fd(backend, renderer, drm_fd);
}
void wlr_allocator_destroy(struct wlr_allocator *alloc) {
if (alloc == NULL) {
return;
}
wl_signal_emit(&alloc->events.destroy, NULL);
alloc->impl->destroy(alloc);
}
struct wlr_buffer *wlr_allocator_create_buffer(struct wlr_allocator *alloc,
int width, int height, const struct wlr_drm_format *format) {
struct wlr_buffer *buffer =
alloc->impl->create_buffer(alloc, width, height, format);
if (buffer == NULL) {
return NULL;
}
if (alloc->buffer_caps & WLR_BUFFER_CAP_DATA_PTR) {
assert(buffer->impl->begin_data_ptr_access &&
buffer->impl->end_data_ptr_access);
}
if (alloc->buffer_caps & WLR_BUFFER_CAP_DMABUF) {
assert(buffer->impl->get_dmabuf);
}
if (alloc->buffer_caps & WLR_BUFFER_CAP_SHM) {
assert(buffer->impl->get_shm);
}
return buffer;
}
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