Mesa (master): util: Support fixed formats conversion.
Jose Fonseca
jrfonseca at kemper.freedesktop.org
Wed Apr 7 21:19:44 UTC 2010
Module: Mesa
Branch: master
Commit: 2c06fa4682ec0dd8a9f9d15ace867a6b952fd2e8
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=2c06fa4682ec0dd8a9f9d15ace867a6b952fd2e8
Author: José Fonseca <jfonseca at vmware.com>
Date: Wed Apr 7 22:16:18 2010 +0100
util: Support fixed formats conversion.
---
src/gallium/auxiliary/util/u_format_pack.py | 53 ++++++++++++++++++++------
src/gallium/auxiliary/util/u_format_parse.py | 4 ++
src/gallium/auxiliary/util/u_format_tests.c | 35 +++++++++++++++++
3 files changed, 80 insertions(+), 12 deletions(-)
diff --git a/src/gallium/auxiliary/util/u_format_pack.py b/src/gallium/auxiliary/util/u_format_pack.py
index aaeb4ce..075f8ca 100644
--- a/src/gallium/auxiliary/util/u_format_pack.py
+++ b/src/gallium/auxiliary/util/u_format_pack.py
@@ -57,7 +57,7 @@ def generate_format_type(format):
print ' unsigned %s:%u;' % (channel.name, channel.size)
elif channel.type == UNSIGNED:
print ' unsigned %s:%u;' % (channel.name, channel.size)
- elif channel.type == SIGNED:
+ elif channel.type in (SIGNED, FIXED):
print ' int %s:%u;' % (channel.name, channel.size)
elif channel.type == FLOAT:
if channel.size == 32:
@@ -111,7 +111,9 @@ def is_format_supported(format):
for i in range(4):
channel = format.channels[i]
- if channel.type not in (VOID, UNSIGNED, SIGNED, FLOAT):
+ if channel.type not in (VOID, UNSIGNED, SIGNED, FLOAT, FIXED):
+ return False
+ if channel.type == FLOAT and channel.size not in (16, 32, 64):
return False
# We can only read a color from a depth/stencil format if the depth channel is present
@@ -133,7 +135,7 @@ def native_type(format):
channel = format.channels[0]
if channel.type in (UNSIGNED, VOID):
return 'uint%u_t' % channel.size
- elif channel.type == SIGNED:
+ elif channel.type in (SIGNED, FIXED):
return 'int%u_t' % channel.size
elif channel.type == FLOAT:
if channel.size == 16:
@@ -179,12 +181,35 @@ def get_one_shift(type):
assert False
-def get_one(type):
+def value_to_native(type, value):
'''Get the value of unity for this type.'''
- if type.type == 'FLOAT' or not type.norm:
- return 1
+ if type.type == FLOAT:
+ return value
+ if type.type == FIXED:
+ return int(value * (1 << (type.size/2)))
+ if not type.norm:
+ return int(value)
+ if type.type == UNSIGNED:
+ return int(value * ((1 << type.size) - 1))
+ if type.type == SIGNED:
+ return int(value * ((1 << (type.size - 1)) - 1))
+ assert False
+
+
+def native_to_constant(type, value):
+ '''Get the value of unity for this type.'''
+ if type.type == FLOAT:
+ if type.size <= 32:
+ return "%ff" % value
+ else:
+ return "%ff" % value
else:
- return (1 << get_one_shift(type)) - 1
+ return str(int(value))
+
+
+def get_one(type):
+ '''Get the value of unity for this type.'''
+ return value_to_native(type, 1)
def clamp_expr(src_channel, dst_channel, dst_native_type, value):
@@ -198,15 +223,19 @@ def clamp_expr(src_channel, dst_channel, dst_native_type, value):
src_max = src_channel.max()
dst_min = dst_channel.min()
dst_max = dst_channel.max()
+
+ # Translate the destination range to the src native value
+ dst_min_native = value_to_native(src_channel, dst_min)
+ dst_max_native = value_to_native(src_channel, dst_max)
if src_min < dst_min and src_max > dst_max:
- return 'CLAMP(%s, %s, %s)' % (value, dst_min, dst_max)
+ return 'CLAMP(%s, %s, %s)' % (value, dst_min_native, dst_max_native)
if src_max > dst_max:
- return 'MIN2(%s, %s)' % (value, dst_max)
+ return 'MIN2(%s, %s)' % (value, dst_max_native)
if src_min < dst_min:
- return 'MAX2(%s, %s)' % (value, dst_min)
+ return 'MAX2(%s, %s)' % (value, dst_min_native)
return value
@@ -290,7 +319,7 @@ def conversion_expr(src_channel,
# Promote to either float or double
if src_type != FLOAT:
- if src_norm:
+ if src_norm or src_type == FIXED:
one = get_one(src_channel)
if src_size <= 23:
value = '(%s * (1.0f/0x%x))' % (value, one)
@@ -314,7 +343,7 @@ def conversion_expr(src_channel,
# Convert double or float to non-float
if dst_channel.type != FLOAT:
- if dst_channel.norm:
+ if dst_channel.norm or dst_channel.type == FIXED:
dst_one = get_one(dst_channel)
if dst_channel.size <= 23:
value = '(%s * 0x%x)' % (value, dst_one)
diff --git a/src/gallium/auxiliary/util/u_format_parse.py b/src/gallium/auxiliary/util/u_format_parse.py
index 03dc62d..96e6451 100755
--- a/src/gallium/auxiliary/util/u_format_parse.py
+++ b/src/gallium/auxiliary/util/u_format_parse.py
@@ -73,6 +73,8 @@ class Channel:
'''Maximum representable number.'''
if self.type == FLOAT:
return VERY_LARGE
+ if self.type == FIXED:
+ return (1 << (self.size/2)) - 1
if self.norm:
return 1
if self.type == UNSIGNED:
@@ -85,6 +87,8 @@ class Channel:
'''Minimum representable number.'''
if self.type == FLOAT:
return -VERY_LARGE
+ if self.type == FIXED:
+ return -(1 << (self.size/2))
if self.type == UNSIGNED:
return 0
if self.norm:
diff --git a/src/gallium/auxiliary/util/u_format_tests.c b/src/gallium/auxiliary/util/u_format_tests.c
index 55ce283..095c4db 100644
--- a/src/gallium/auxiliary/util/u_format_tests.c
+++ b/src/gallium/auxiliary/util/u_format_tests.c
@@ -836,6 +836,41 @@ util_format_test_cases[] =
{PIPE_FORMAT_R16G16B16A16_FLOAT, PACKED_4x16(0xffff, 0xffff, 0xffff, 0xffff), PACKED_4x16(0x0000, 0x0000, 0x0000, 0x3c00), UNPACKED_1x1( 0.0, 0.0, 0.0, 1.0)},
{PIPE_FORMAT_R16G16B16A16_FLOAT, PACKED_4x16(0xffff, 0xffff, 0xffff, 0xffff), PACKED_4x16(0x0000, 0x0000, 0x0000, 0xbc00), UNPACKED_1x1( 0.0, 0.0, 0.0, -1.0)},
{PIPE_FORMAT_R16G16B16A16_FLOAT, PACKED_4x16(0xffff, 0xffff, 0xffff, 0xffff), PACKED_4x16(0x3c00, 0x3c00, 0x3c00, 0x3c00), UNPACKED_1x1( 1.0, 1.0, 1.0, 1.0)},
+
+ /*
+ * 32-bit fixed point formats
+ */
+
+ {PIPE_FORMAT_R32_FIXED, PACKED_1x32(0xffffffff), PACKED_1x32(0x00000000), UNPACKED_1x1( 0.0, 0.0, 0.0, 1.0)},
+ {PIPE_FORMAT_R32_FIXED, PACKED_1x32(0xffffffff), PACKED_1x32(0x00010000), UNPACKED_1x1( 1.0, 0.0, 0.0, 1.0)},
+ {PIPE_FORMAT_R32_FIXED, PACKED_1x32(0xffffffff), PACKED_1x32(0xffff0000), UNPACKED_1x1( -1.0, 0.0, 0.0, 1.0)},
+
+ {PIPE_FORMAT_R32G32_FIXED, PACKED_2x32(0xffffffff, 0xffffffff), PACKED_2x32(0x00000000, 0x00000000), UNPACKED_1x1( 0.0, 0.0, 0.0, 1.0)},
+ {PIPE_FORMAT_R32G32_FIXED, PACKED_2x32(0xffffffff, 0xffffffff), PACKED_2x32(0x00010000, 0x00000000), UNPACKED_1x1( 1.0, 0.0, 0.0, 1.0)},
+ {PIPE_FORMAT_R32G32_FIXED, PACKED_2x32(0xffffffff, 0xffffffff), PACKED_2x32(0xffff0000, 0x00000000), UNPACKED_1x1(-1.0, 0.0, 0.0, 1.0)},
+ {PIPE_FORMAT_R32G32_FIXED, PACKED_2x32(0xffffffff, 0xffffffff), PACKED_2x32(0x00000000, 0x00010000), UNPACKED_1x1( 0.0, 1.0, 0.0, 1.0)},
+ {PIPE_FORMAT_R32G32_FIXED, PACKED_2x32(0xffffffff, 0xffffffff), PACKED_2x32(0x00000000, 0xffff0000), UNPACKED_1x1( 0.0, -1.0, 0.0, 1.0)},
+ {PIPE_FORMAT_R32G32_FIXED, PACKED_2x32(0xffffffff, 0xffffffff), PACKED_2x32(0x00010000, 0x00010000), UNPACKED_1x1( 1.0, 1.0, 0.0, 1.0)},
+
+ {PIPE_FORMAT_R32G32B32_FIXED, PACKED_3x32(0xffffffff, 0xffffffff, 0xffffffff), PACKED_3x32(0x00000000, 0x00000000, 0x00000000), UNPACKED_1x1( 0.0, 0.0, 0.0, 1.0)},
+ {PIPE_FORMAT_R32G32B32_FIXED, PACKED_3x32(0xffffffff, 0xffffffff, 0xffffffff), PACKED_3x32(0x00010000, 0x00000000, 0x00000000), UNPACKED_1x1( 1.0, 0.0, 0.0, 1.0)},
+ {PIPE_FORMAT_R32G32B32_FIXED, PACKED_3x32(0xffffffff, 0xffffffff, 0xffffffff), PACKED_3x32(0xffff0000, 0x00000000, 0x00000000), UNPACKED_1x1(-1.0, 0.0, 0.0, 1.0)},
+ {PIPE_FORMAT_R32G32B32_FIXED, PACKED_3x32(0xffffffff, 0xffffffff, 0xffffffff), PACKED_3x32(0x00000000, 0x00010000, 0x00000000), UNPACKED_1x1( 0.0, 1.0, 0.0, 1.0)},
+ {PIPE_FORMAT_R32G32B32_FIXED, PACKED_3x32(0xffffffff, 0xffffffff, 0xffffffff), PACKED_3x32(0x00000000, 0xffff0000, 0x00000000), UNPACKED_1x1( 0.0, -1.0, 0.0, 1.0)},
+ {PIPE_FORMAT_R32G32B32_FIXED, PACKED_3x32(0xffffffff, 0xffffffff, 0xffffffff), PACKED_3x32(0x00000000, 0x00000000, 0x00010000), UNPACKED_1x1( 0.0, 0.0, 1.0, 1.0)},
+ {PIPE_FORMAT_R32G32B32_FIXED, PACKED_3x32(0xffffffff, 0xffffffff, 0xffffffff), PACKED_3x32(0x00000000, 0x00000000, 0xffff0000), UNPACKED_1x1( 0.0, 0.0, -1.0, 1.0)},
+ {PIPE_FORMAT_R32G32B32_FIXED, PACKED_3x32(0xffffffff, 0xffffffff, 0xffffffff), PACKED_3x32(0x00010000, 0x00010000, 0x00010000), UNPACKED_1x1( 1.0, 1.0, 1.0, 1.0)},
+
+ {PIPE_FORMAT_R32G32B32A32_FIXED, PACKED_4x32(0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff), PACKED_4x32(0x00000000, 0x00000000, 0x00000000, 0x00000000), UNPACKED_1x1( 0.0, 0.0, 0.0, 0.0)},
+ {PIPE_FORMAT_R32G32B32A32_FIXED, PACKED_4x32(0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff), PACKED_4x32(0x00010000, 0x00000000, 0x00000000, 0x00000000), UNPACKED_1x1( 1.0, 0.0, 0.0, 0.0)},
+ {PIPE_FORMAT_R32G32B32A32_FIXED, PACKED_4x32(0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff), PACKED_4x32(0xffff0000, 0x00000000, 0x00000000, 0x00000000), UNPACKED_1x1(-1.0, 0.0, 0.0, 0.0)},
+ {PIPE_FORMAT_R32G32B32A32_FIXED, PACKED_4x32(0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff), PACKED_4x32(0x00000000, 0x00010000, 0x00000000, 0x00000000), UNPACKED_1x1( 0.0, 1.0, 0.0, 0.0)},
+ {PIPE_FORMAT_R32G32B32A32_FIXED, PACKED_4x32(0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff), PACKED_4x32(0x00000000, 0xffff0000, 0x00000000, 0x00000000), UNPACKED_1x1( 0.0, -1.0, 0.0, 0.0)},
+ {PIPE_FORMAT_R32G32B32A32_FIXED, PACKED_4x32(0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff), PACKED_4x32(0x00000000, 0x00000000, 0x00010000, 0x00000000), UNPACKED_1x1( 0.0, 0.0, 1.0, 0.0)},
+ {PIPE_FORMAT_R32G32B32A32_FIXED, PACKED_4x32(0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff), PACKED_4x32(0x00000000, 0x00000000, 0xffff0000, 0x00000000), UNPACKED_1x1( 0.0, 0.0, -1.0, 0.0)},
+ {PIPE_FORMAT_R32G32B32A32_FIXED, PACKED_4x32(0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff), PACKED_4x32(0x00000000, 0x00000000, 0x00000000, 0x00010000), UNPACKED_1x1( 0.0, 0.0, 0.0, 1.0)},
+ {PIPE_FORMAT_R32G32B32A32_FIXED, PACKED_4x32(0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff), PACKED_4x32(0x00000000, 0x00000000, 0x00000000, 0xffff0000), UNPACKED_1x1( 0.0, 0.0, 0.0, -1.0)},
+ {PIPE_FORMAT_R32G32B32A32_FIXED, PACKED_4x32(0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff), PACKED_4x32(0x00010000, 0x00010000, 0x00010000, 0x00010000), UNPACKED_1x1( 1.0, 1.0, 1.0, 1.0)},
};
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