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linux-dmabuf-v1: add wlr_linux_dmabuf_feedback_v1_init_with_options()

This commit is contained in:
Simon Ser 2022-12-09 18:30:16 +01:00 committed by Simon Zeni
parent b264ec7767
commit 0c966f102c
2 changed files with 100 additions and 0 deletions
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15
include/wlr/types/wlr_linux_dmabuf_v1.h
View File

@ -111,4 +111,19 @@ struct wlr_linux_dmabuf_feedback_v1_tranche *wlr_linux_dmabuf_feedback_add_tranc
*/
void wlr_linux_dmabuf_feedback_v1_finish(struct wlr_linux_dmabuf_feedback_v1 *feedback);
struct wlr_linux_dmabuf_feedback_v1_init_options {
// Main renderer used by the compositor
struct wlr_renderer *main_renderer;
// Output on which direct scan-out is possible on the primary plane, or NULL
struct wlr_output *scanout_primary_output;
};
/**
* Initialize a DMA-BUF feedback object with the provided options.
*
* The caller is responsible for calling wlr_linux_dmabuf_feedback_v1_finish() after use.
*/
bool wlr_linux_dmabuf_feedback_v1_init_with_options(struct wlr_linux_dmabuf_feedback_v1 *feedback,
const struct wlr_linux_dmabuf_feedback_v1_init_options *options);
#endif

85
types/wlr_linux_dmabuf_v1.c
View File

@ -5,6 +5,7 @@
#include <stdlib.h>
#include <sys/mman.h>
#include <unistd.h>
#include <wlr/backend.h>
#include <wlr/interfaces/wlr_buffer.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/types/wlr_compositor.h>
@ -1076,3 +1077,87 @@ void wlr_linux_dmabuf_feedback_v1_finish(struct wlr_linux_dmabuf_feedback_v1 *fe
}
wl_array_release(&feedback->tranches);
}
static bool devid_from_fd(int fd, dev_t *devid) {
struct stat stat;
if (fstat(fd, &stat) != 0) {
wlr_log_errno(WLR_ERROR, "fstat failed");
return false;
}
*devid = stat.st_rdev;
return true;
}
bool wlr_linux_dmabuf_feedback_v1_init_with_options(struct wlr_linux_dmabuf_feedback_v1 *feedback,
const struct wlr_linux_dmabuf_feedback_v1_init_options *options) {
assert(options->main_renderer != NULL);
memset(feedback, 0, sizeof(*feedback));
int renderer_drm_fd = wlr_renderer_get_drm_fd(options->main_renderer);
if (renderer_drm_fd < 0) {
wlr_log(WLR_ERROR, "Failed to get renderer DRM FD");
goto error;
}
dev_t renderer_dev;
if (!devid_from_fd(renderer_drm_fd, &renderer_dev)) {
goto error;
}
feedback->main_device = renderer_dev;
const struct wlr_drm_format_set *renderer_formats =
wlr_renderer_get_dmabuf_texture_formats(options->main_renderer);
if (renderer_formats == NULL) {
wlr_log(WLR_ERROR, "Failed to get renderer DMA-BUF texture formats");
goto error;
}
if (options->scanout_primary_output != NULL) {
int backend_drm_fd = wlr_backend_get_drm_fd(options->scanout_primary_output->backend);
if (backend_drm_fd < 0) {
wlr_log(WLR_ERROR, "Failed to get backend DRM FD");
goto error;
}
dev_t backend_dev;
if (!devid_from_fd(backend_drm_fd, &backend_dev)) {
goto error;
}
const struct wlr_drm_format_set *scanout_formats =
wlr_output_get_primary_formats(options->scanout_primary_output, WLR_BUFFER_CAP_DMABUF);
if (scanout_formats == NULL) {
wlr_log(WLR_ERROR, "Failed to get output primary DMA-BUF formats");
goto error;
}
struct wlr_linux_dmabuf_feedback_v1_tranche *tranche =
wlr_linux_dmabuf_feedback_add_tranche(feedback);
if (tranche == NULL) {
goto error;
}
tranche->target_device = backend_dev;
if (!wlr_drm_format_set_intersect(&tranche->formats, scanout_formats, renderer_formats)) {
wlr_log(WLR_ERROR, "Failed to intersect renderer and scanout formats");
goto error;
}
}
struct wlr_linux_dmabuf_feedback_v1_tranche *tranche =
wlr_linux_dmabuf_feedback_add_tranche(feedback);
if (tranche == NULL) {
goto error;
}
tranche->target_device = renderer_dev;
if (!wlr_drm_format_set_copy(&tranche->formats, renderer_formats)) {
goto error;
}
return true;
error:
wlr_linux_dmabuf_feedback_v1_finish(feedback);
return false;
}