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render/pixel-format: Move has_alpha into it's own array

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Some opaque pixel formats (nv12, p010) require per-plane bytes_per_block
info. However, it doesn't make sense to store them in
wlr_pixel_format_info, as they will never be useful (currently, this
info is used for shm, which doesn't have a concept of multi-planar
buffers.)

Let's define a separate array and function for determining whether a
pixel format has alpha.
This commit is contained in:
Leo Li 2024-01-31 12:30:16 -05:00
parent 3a91dc1b48
commit 71fb55f3bf
5 changed files with 46 additions and 28 deletions
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8
include/render/pixel_format.h
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@ -27,9 +27,6 @@ struct wlr_pixel_format_info {
uint32_t bytes_per_block;
/* Size of a block in pixels (zero for 1×1) */
uint32_t block_width, block_height;
/* True if the format has an alpha channel */
bool has_alpha;
};
/**
@ -61,4 +58,9 @@ uint32_t convert_wl_shm_format_to_drm(enum wl_shm_format fmt);
*/
enum wl_shm_format convert_drm_format_to_wl_shm(uint32_t fmt);
/**
* Return true if the DRM FourCC fmt has an alpha channel, false otherwise.
*/
bool pixel_format_has_alpha(uint32_t fmt);
#endif