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pixel-formats: Document pixel format human-friendly conversion methods

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Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
This commit is contained in:
Marius Vlad 2019-01-22 17:56:58 +02:00
parent f5ca2f1424
commit 2ce2339045
1 changed files with 13 additions and 0 deletions
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13
libweston/pixel-formats.c
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@ -387,6 +387,10 @@ pixel_format_get_info_shm(uint32_t format)
return pixel_format_get_info(format);
}
/** Retrive a pixel format information structure from a DRM FOURCC format
*
* \param format a DRM FOURCC format
*/
WL_EXPORT const struct pixel_format_info *
pixel_format_get_info(uint32_t format)
{
@ -427,6 +431,15 @@ pixel_format_is_opaque(const struct pixel_format_info *info)
return !info->opaque_substitute;
}
/** Retrieve the opaque substitute for a pixel format
*
* If the given pixel format contains an alpha channel, look up an identical
* pixel format except where the alpha channel is ignored, if such format
* exists. Otherwise returns the passed in format as is.
*
* \param info a pixel_format_info already retrieved using pixel_format_get_info()
*
*/
WL_EXPORT const struct pixel_format_info *
pixel_format_get_opaque_substitute(const struct pixel_format_info *info)
{