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render/gbm_allocator: export to DMA-BUF on init 

Instead of lazily exporting BOs to DMA-BUFs, do it on init. This is
the only way to use the buffer, so there's no point in deferring
that work.

This is preparatory work for the next commit.
This commit is contained in:
Simon Ser 2021-01-16 20:15:53 +01:00
parent c6c7fccd96
commit b5cefada92
1 changed files with 58 additions and 68 deletions
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126
render/gbm_allocator.c
View File

@ -16,63 +16,8 @@ static struct wlr_gbm_buffer *get_gbm_buffer_from_buffer(
return (struct wlr_gbm_buffer *)buffer;
}
static struct wlr_gbm_buffer *create_buffer(struct wlr_gbm_allocator *alloc,
int width, int height, const struct wlr_drm_format *format) {
struct gbm_device *gbm_device = alloc->gbm_device;
struct gbm_bo *bo = NULL;
if (format->len > 0) {
bo = gbm_bo_create_with_modifiers(gbm_device, width, height,
format->format, format->modifiers, format->len);
}
if (bo == NULL) {
uint32_t usage = GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING;
if (format->len == 1 &&
format->modifiers[0] == DRM_FORMAT_MOD_LINEAR) {
usage |= GBM_BO_USE_LINEAR;
}
bo = gbm_bo_create(gbm_device, width, height, format->format, usage);
}
if (bo == NULL) {
wlr_log(WLR_ERROR, "gbm_bo_create failed");
return NULL;
}
struct wlr_gbm_buffer *buffer = calloc(1, sizeof(*buffer));
if (buffer == NULL) {
gbm_bo_destroy(bo);
return NULL;
}
wlr_buffer_init(&buffer->base, &buffer_impl, width, height);
buffer->gbm_bo = bo;
wl_list_insert(&alloc->buffers, &buffer->link);
wlr_log(WLR_DEBUG, "Allocated %dx%d GBM buffer (format 0x%"PRIX32", "
"modifier 0x%"PRIX64")", buffer->base.width, buffer->base.height,
gbm_bo_get_format(bo), gbm_bo_get_modifier(bo));
return buffer;
}
static void buffer_destroy(struct wlr_buffer *wlr_buffer) {
struct wlr_gbm_buffer *buffer =
get_gbm_buffer_from_buffer(wlr_buffer);
wlr_dmabuf_attributes_finish(&buffer->dmabuf);
if (buffer->gbm_bo != NULL) {
gbm_bo_destroy(buffer->gbm_bo);
}
wl_list_remove(&buffer->link);
free(buffer);
}
static bool buffer_create_dmabuf(struct wlr_gbm_buffer *buffer) {
assert(buffer->dmabuf.n_planes == 0);
struct gbm_bo *bo = buffer->gbm_bo;
if (bo == NULL) {
return false;
}
static bool export_gbm_bo(struct gbm_bo *bo,
struct wlr_dmabuf_attributes *out) {
struct wlr_dmabuf_attributes attribs = {0};
attribs.n_planes = gbm_bo_get_plane_count(bo);
@ -107,7 +52,7 @@ static bool buffer_create_dmabuf(struct wlr_gbm_buffer *buffer) {
attribs.stride[i] = gbm_bo_get_stride_for_plane(bo, i);
}
memcpy(&buffer->dmabuf, &attribs, sizeof(attribs));
memcpy(out, &attribs, sizeof(attribs));
return true;
error_fd:
@ -117,20 +62,65 @@ error_fd:
return false;
}
static struct wlr_gbm_buffer *create_buffer(struct wlr_gbm_allocator *alloc,
int width, int height, const struct wlr_drm_format *format) {
struct gbm_device *gbm_device = alloc->gbm_device;
struct gbm_bo *bo = NULL;
if (format->len > 0) {
bo = gbm_bo_create_with_modifiers(gbm_device, width, height,
format->format, format->modifiers, format->len);
}
if (bo == NULL) {
uint32_t usage = GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING;
if (format->len == 1 &&
format->modifiers[0] == DRM_FORMAT_MOD_LINEAR) {
usage |= GBM_BO_USE_LINEAR;
}
bo = gbm_bo_create(gbm_device, width, height, format->format, usage);
}
if (bo == NULL) {
wlr_log(WLR_ERROR, "gbm_bo_create failed");
return NULL;
}
struct wlr_gbm_buffer *buffer = calloc(1, sizeof(*buffer));
if (buffer == NULL) {
gbm_bo_destroy(bo);
return NULL;
}
wlr_buffer_init(&buffer->base, &buffer_impl, width, height);
buffer->gbm_bo = bo;
wl_list_insert(&alloc->buffers, &buffer->link);
if (!export_gbm_bo(bo, &buffer->dmabuf)) {
free(buffer);
gbm_bo_destroy(bo);
return NULL;
}
wlr_log(WLR_DEBUG, "Allocated %dx%d GBM buffer (format 0x%"PRIX32", "
"modifier 0x%"PRIX64")", buffer->base.width, buffer->base.height,
gbm_bo_get_format(bo), gbm_bo_get_modifier(bo));
return buffer;
}
static void buffer_destroy(struct wlr_buffer *wlr_buffer) {
struct wlr_gbm_buffer *buffer =
get_gbm_buffer_from_buffer(wlr_buffer);
wlr_dmabuf_attributes_finish(&buffer->dmabuf);
if (buffer->gbm_bo != NULL) {
gbm_bo_destroy(buffer->gbm_bo);
}
wl_list_remove(&buffer->link);
free(buffer);
}
static bool buffer_get_dmabuf(struct wlr_buffer *wlr_buffer,
struct wlr_dmabuf_attributes *attribs) {
struct wlr_gbm_buffer *buffer =
get_gbm_buffer_from_buffer(wlr_buffer);
memset(attribs, 0, sizeof(*attribs));
// Only export the buffer once
if (buffer->dmabuf.n_planes == 0) {
if (!buffer_create_dmabuf(buffer)) {
return false;
}
}
memcpy(attribs, &buffer->dmabuf, sizeof(buffer->dmabuf));
return true;
}