'''
/**************************************************************************
*
- * Copyright 2009 VMware, Inc.
+ * Copyright 2009-2010 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
'''
-import sys
-import math
-
from u_format_parse import *
def generate_format_type(format):
'''Generate a structure that describes the format.'''
+ assert format.layout == PLAIN
+
print 'union util_format_%s {' % format.short_name()
- if format.is_bitmask() or format.short_name() == "r11g11b10_float":
+
+ if format.block_size() in (8, 16, 32, 64):
print ' uint%u_t value;' % (format.block_size(),)
+
+ use_bitfields = False
+ for channel in format.channels:
+ if channel.size % 8 or not is_pot(channel.size):
+ use_bitfields = True
+
print ' struct {'
for channel in format.channels:
- if (format.is_bitmask() or format.is_mixed()) and not format.is_array() or format.short_name() == "r11g11b10_float":
+ if use_bitfields:
if channel.type == VOID:
if channel.size:
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:
+ if channel.size == 64:
+ print ' double %s;' % (channel.name)
+ elif channel.size == 32:
print ' float %s;' % (channel.name)
else:
print ' unsigned %s:%u;' % (channel.name, channel.size)
print
-def generate_srgb_tables():
- print 'static ubyte srgb_to_linear[256] = {'
- for i in range(256):
- print ' %s,' % (int(math.pow((i / 255.0 + 0.055) / 1.055, 2.4) * 255))
- print '};'
- print
- print 'static ubyte linear_to_srgb[256] = {'
- print ' 0,'
- for i in range(1, 256):
- print ' %s,' % (int((1.055 * math.pow(i / 255.0, 0.41666) - 0.055) * 255))
- print '};'
- print
-
-
def bswap_format(format):
'''Generate a structure that describes the 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
- if format.colorspace == 'zs' and format.swizzles[0] == SWIZZLE_NONE:
- return False
return True
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:
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):
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
-def conversion_expr(src_channel, dst_channel, dst_native_type, value, clamp=True):
+def conversion_expr(src_channel,
+ dst_channel, dst_native_type,
+ value,
+ clamp=True,
+ src_colorspace = RGB,
+ dst_colorspace = RGB):
'''Generate the expression to convert a value between two types.'''
+ if src_colorspace != dst_colorspace:
+ if src_colorspace == SRGB:
+ assert src_channel.type == UNSIGNED
+ assert src_channel.norm
+ assert src_channel.size == 8
+ assert dst_colorspace == RGB
+ if dst_channel.type == FLOAT:
+ return 'util_format_srgb_8unorm_to_linear_float(%s)' % value
+ else:
+ assert dst_channel.type == UNSIGNED
+ assert dst_channel.norm
+ assert dst_channel.size == 8
+ return 'util_format_srgb_to_linear_8unorm(%s)' % value
+ elif dst_colorspace == SRGB:
+ assert dst_channel.type == UNSIGNED
+ assert dst_channel.norm
+ assert dst_channel.size == 8
+ assert src_colorspace == RGB
+ if src_channel.type == FLOAT:
+ return 'util_format_linear_float_to_srgb_8unorm(%s)' % value
+ else:
+ assert src_channel.type == UNSIGNED
+ assert src_channel.norm
+ assert src_channel.size == 8
+ return 'util_format_linear_to_srgb_8unorm(%s)' % value
+ elif src_colorspace == ZS:
+ pass
+ elif dst_colorspace == ZS:
+ pass
+ else:
+ assert 0
+
if src_channel == dst_channel:
return value
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_size == 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)
# 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)
# 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)
if format.is_bitmask():
depth = format.block_size()
- print ' uint%u_t value = *(uint%u_t *)src;' % (depth, depth)
+ print ' uint%u_t value = *(const uint%u_t *)src;' % (depth, depth)
# Declare the intermediate variables
for i in range(format.nr_channels()):
swizzle = format.swizzles[i]
if swizzle < 4:
src_channel = format.channels[swizzle]
+ src_colorspace = format.colorspace
+ if src_colorspace == SRGB and i == 3:
+ # Alpha channel is linear
+ src_colorspace = RGB
value = src_channel.name
- value = conversion_expr(src_channel, dst_channel, dst_native_type, value)
+ value = conversion_expr(src_channel,
+ dst_channel, dst_native_type,
+ value,
+ src_colorspace = src_colorspace)
elif swizzle == SWIZZLE_0:
value = '0'
elif swizzle == SWIZZLE_1:
value = '0'
else:
assert False
- if format.colorspace == ZS:
- if i == 3:
- value = get_one(dst_channel)
- elif i >= 1:
- value = 'dst[0]'
print ' dst[%u] = %s; /* %s */' % (i, value, 'rgba'[i])
else:
swizzle = format.swizzles[i]
if swizzle < 4:
src_channel = format.channels[swizzle]
+ src_colorspace = format.colorspace
+ if src_colorspace == SRGB and i == 3:
+ # Alpha channel is linear
+ src_colorspace = RGB
value = 'pixel.chan.%s' % src_channel.name
- value = conversion_expr(src_channel, dst_channel, dst_native_type, value)
+ value = conversion_expr(src_channel,
+ dst_channel, dst_native_type,
+ value,
+ src_colorspace = src_colorspace)
elif swizzle == SWIZZLE_0:
value = '0'
elif swizzle == SWIZZLE_1:
value = '0'
else:
assert False
- if format.colorspace == ZS:
- if i == 3:
- value = get_one(dst_channel)
- elif i >= 1:
- value = 'dst[0]'
print ' dst[%u] = %s; /* %s */' % (i, value, 'rgba'[i])
dst_channel = format.channels[i]
if inv_swizzle[i] is not None:
value ='src[%u]' % inv_swizzle[i]
- value = conversion_expr(src_channel, dst_channel, dst_native_type, value)
- if format.colorspace == ZS:
- if i == 3:
- value = get_one(dst_channel)
- elif i >= 1:
- value = '0'
+ dst_colorspace = format.colorspace
+ if dst_colorspace == SRGB and inv_swizzle[i] == 3:
+ # Alpha channel is linear
+ dst_colorspace = RGB
+ value = conversion_expr(src_channel,
+ dst_channel, dst_native_type,
+ value,
+ dst_colorspace = dst_colorspace)
if dst_channel.type in (UNSIGNED, SIGNED):
if shift + dst_channel.size < depth:
value = '(%s) & 0x%x' % (value, (1 << dst_channel.size) - 1)
width = dst_channel.size
if inv_swizzle[i] is None:
continue
+ dst_colorspace = format.colorspace
+ if dst_colorspace == SRGB and inv_swizzle[i] == 3:
+ # Alpha channel is linear
+ dst_colorspace = RGB
value ='src[%u]' % inv_swizzle[i]
- value = conversion_expr(src_channel, dst_channel, dst_native_type, value)
- if format.colorspace == ZS:
- if i == 3:
- value = get_one(dst_channel)
- elif i >= 1:
- value = '0'
+ value = conversion_expr(src_channel,
+ dst_channel, dst_native_type,
+ value,
+ dst_colorspace = dst_colorspace)
print ' pixel.chan.%s = %s;' % (dst_channel.name, value)
bswap_format(format)
print
+def is_format_hand_written(format):
+ return format.layout in ('s3tc', 'rgtc', 'subsampled', 'other') or format.colorspace == ZS
+
+
def generate(formats):
print
print '#include "pipe/p_compiler.h"'
print '#include "u_math.h"'
- print '#include "u_format.h"'
print '#include "u_half.h"'
+ print '#include "u_format.h"'
+ print '#include "u_format_other.h"'
+ print '#include "u_format_srgb.h"'
+ print '#include "u_format_yuv.h"'
+ print '#include "u_format_zs.h"'
print
for format in formats:
- if is_format_supported(format):
- generate_format_type(format)
+ if not is_format_hand_written(format):
+
+ if is_format_supported(format):
+ generate_format_type(format)
- channel = Channel(FLOAT, False, 32)
- native_type = 'float'
- suffix = 'float'
+ channel = Channel(FLOAT, False, 32)
+ native_type = 'float'
+ suffix = 'rgba_float'
- for format in formats:
- if format.layout != 's3tc':
generate_format_unpack(format, channel, native_type, suffix)
generate_format_pack(format, channel, native_type, suffix)
generate_format_fetch(format, channel, native_type, suffix)
- channel = Channel(UNSIGNED, True, 8)
- native_type = 'uint8_t'
- suffix = '8unorm'
+ channel = Channel(UNSIGNED, True, 8)
+ native_type = 'uint8_t'
+ suffix = 'rgba_8unorm'
- for format in formats:
- if format.layout != 's3tc':
generate_format_unpack(format, channel, native_type, suffix)
generate_format_pack(format, channel, native_type, suffix)
projects / mesa.git / blobdiff