diff options
Diffstat (limited to 'src/gallium/auxiliary/util')
| -rw-r--r-- | src/gallium/auxiliary/util/u_format.c | 20 | ||||
| -rw-r--r-- | src/gallium/auxiliary/util/u_format.h | 3 |
2 files changed, 23 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_format.c b/src/gallium/auxiliary/util/u_format.c index 9bdc2eabf11..686ca8a898e 100644 --- a/src/gallium/auxiliary/util/u_format.c +++ b/src/gallium/auxiliary/util/u_format.c @@ -131,6 +131,26 @@ util_format_is_pure_uint(enum pipe_format format) return (desc->channel[i].type == UTIL_FORMAT_TYPE_UNSIGNED && desc->channel[i].pure_integer) ? TRUE : FALSE; } +/** + * Returns true if all non-void channels are normalized signed. + */ +boolean +util_format_is_snorm(enum pipe_format format) +{ + const struct util_format_description *desc = util_format_description(format); + int i; + + if (desc->is_mixed) + return FALSE; + + i = util_format_get_first_non_void_channel(format); + if (i == -1) + return FALSE; + + return desc->channel[i].type == UTIL_FORMAT_TYPE_SIGNED && + !desc->channel[i].pure_integer && + desc->channel[i].normalized; +} boolean util_format_is_luminance_alpha(enum pipe_format format) diff --git a/src/gallium/auxiliary/util/u_format.h b/src/gallium/auxiliary/util/u_format.h index 9774a2b4c82..bb729c0959b 100644 --- a/src/gallium/auxiliary/util/u_format.h +++ b/src/gallium/auxiliary/util/u_format.h @@ -645,6 +645,9 @@ util_format_is_pure_sint(enum pipe_format format); boolean util_format_is_pure_uint(enum pipe_format format); +boolean +util_format_is_snorm(enum pipe_format format); + /** * Check if the src format can be blitted to the destination format with * a simple memcpy. For example, blitting from RGBA to RGBx is OK, but not |