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util/format: add util_format_is_rgbx_or_bgrx

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Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10351>
This commit is contained in:
Mike Blumenkrantz 2021-04-20 12:17:40 -04:00 • committed by Marge Bot
parent 7f8c5844ef
commit 2417cd3e0e
1 changed files with 13 additions and 0 deletions
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13
src/util/format/u_format.h
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@ -802,6 +802,19 @@ util_format_is_rgba8_variant(const struct util_format_description *desc)
return TRUE;
}
static inline bool
util_format_is_rgbx_or_bgrx(enum pipe_format format)
{
const struct util_format_description *desc = util_format_description(format);
return desc->layout == UTIL_FORMAT_LAYOUT_PLAIN &&
desc->nr_channels == 4 &&
(desc->swizzle[0] == PIPE_SWIZZLE_X || desc->swizzle[0] == PIPE_SWIZZLE_Z) &&
desc->swizzle[1] == PIPE_SWIZZLE_Y &&
(desc->swizzle[2] == PIPE_SWIZZLE_Z || desc->swizzle[2] == PIPE_SWIZZLE_X) &&
desc->swizzle[3] == PIPE_SWIZZLE_1;
}
/**
* Return total bits needed for the pixel format per block.
*/