diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/gallium/auxiliary/util/u_format.c | 17 | ||||
| -rw-r--r-- | src/gallium/auxiliary/util/u_format.h | 2 |
2 files changed, 19 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_format.c b/src/gallium/auxiliary/util/u_format.c index d53dd7884f0..c1ce408119f 100644 --- a/src/gallium/auxiliary/util/u_format.c +++ b/src/gallium/auxiliary/util/u_format.c @@ -92,6 +92,23 @@ util_format_is_luminance(enum pipe_format format) } boolean +util_format_is_alpha(enum pipe_format format) +{ + const struct util_format_description *desc = + util_format_description(format); + + if ((desc->colorspace == UTIL_FORMAT_COLORSPACE_RGB || + desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB) && + desc->swizzle[0] == UTIL_FORMAT_SWIZZLE_0 && + desc->swizzle[1] == UTIL_FORMAT_SWIZZLE_0 && + desc->swizzle[2] == UTIL_FORMAT_SWIZZLE_0 && + desc->swizzle[3] == UTIL_FORMAT_SWIZZLE_X) { + return TRUE; + } + return FALSE; +} + +boolean util_format_is_pure_integer(enum pipe_format format) { const struct util_format_description *desc = util_format_description(format); diff --git a/src/gallium/auxiliary/util/u_format.h b/src/gallium/auxiliary/util/u_format.h index df31400af90..621574c9673 100644 --- a/src/gallium/auxiliary/util/u_format.h +++ b/src/gallium/auxiliary/util/u_format.h @@ -661,6 +661,8 @@ util_format_has_alpha(enum pipe_format format); boolean util_format_is_luminance(enum pipe_format format); +boolean +util_format_is_alpha(enum pipe_format format); boolean util_format_is_luminance_alpha(enum pipe_format format); |