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render/pixel-format: add support for block-based formats

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Some formats like sub-sampled YCbCr use a block of bytes to
store the color values for more than one pixel. Update our format
table to be able to handle such formats.
This commit is contained in:
Simon Ser 2023-05-08 22:17:26 +02:00
parent 78a1ac540e
commit 96f3f3c92e
9 changed files with 117 additions and 56 deletions
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6
render/allocator/drm_dumb.c
View file

@ -44,6 +44,9 @@ static struct wlr_drm_dumb_buffer *create_buffer(
wlr_log(WLR_ERROR, "DRM format 0x%"PRIX32" not supported",
format->format);
return NULL;
} else if (pixel_format_info_pixels_per_block(info) != 1) {
wlr_log(WLR_ERROR, "Block formats are not supported");
return NULL;
}
struct wlr_drm_dumb_buffer *buffer = calloc(1, sizeof(*buffer));
@ -55,7 +58,8 @@ static struct wlr_drm_dumb_buffer *create_buffer(
buffer->drm_fd = alloc->drm_fd;
if (drmModeCreateDumbBuffer(alloc->drm_fd, width, height, info->bpp, 0,
uint32_t bpp = 8 * info->bytes_per_block;
if (drmModeCreateDumbBuffer(alloc->drm_fd, width, height, bpp, 0,
&buffer->handle, &buffer->stride, &buffer->size) != 0) {
wlr_log_errno(WLR_ERROR, "Failed to create DRM dumb buffer");
goto create_destroy;

3
render/allocator/shm.c
View file

@ -71,8 +71,7 @@ static struct wlr_buffer *allocator_create_buffer(
wlr_buffer_init(&buffer->base, &buffer_impl, width, height);
// TODO: consider using a single file for multiple buffers
int bytes_per_pixel = info->bpp / 8;
int stride = width * bytes_per_pixel; // TODO: align?
int stride = pixel_format_info_min_stride(info, width); // TODO: align?
buffer->size = stride * height;
buffer->shm.fd = allocate_shm_file(buffer->size);
if (buffer->shm.fd < 0) {