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authorJosé Fonseca <jfonseca@vmware.com>2010-04-09 16:53:07 +0100
committerJosé Fonseca <jfonseca@vmware.com>2010-04-09 16:53:07 +0100
commit142fb27c3b4c530174968c5f84fd1bd787b8e3de (patch)
tree3dde4edea442d7b175516aab18db45f2caad43fe
parent866d22ccce93fa507aca06aaa25217d18b1cdd0f (diff)
util: ubyte_to_float and float_to_ubyte whenever possible.
More accurate results. We should probably generalize these functions for more cases.
-rw-r--r--src/gallium/auxiliary/util/u_format_pack.py7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_format_pack.py b/src/gallium/auxiliary/util/u_format_pack.py
index a92a5bcfa9..a6070934f0 100644
--- a/src/gallium/auxiliary/util/u_format_pack.py
+++ b/src/gallium/auxiliary/util/u_format_pack.py
@@ -299,6 +299,13 @@ def conversion_expr(src_channel,
value = 'util_half_to_float(%s)' % value
src_size = 32
+ # Special case for float <-> ubytes for more accurate results
+ # Done before clamping since these functions already take care of that
+ if src_type == UNSIGNED and src_norm and src_size == 8 and dst_channel.type == FLOAT and dst_channel.size == 32:
+ return 'ubyte_to_float(%s)' % value
+ if src_type == FLOAT and src_type == 32 and dst_channel.type == UNSIGNED and dst_channel.norm and dst_channel.size == 8:
+ return 'float_to_ubyte(%s)' % value
+
if clamp:
if dst_channel.type != FLOAT or src_type != FLOAT:
value = clamp_expr(src_channel, dst_channel, dst_native_type, value)