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util: Use bitshift arithmetic for pack too.

This commit is contained in:
José Fonseca 2010-03-07 01:24:57 +00:00
parent a73fd447d4
commit 09a7c25e76
1 changed files with 59 additions and 20 deletions
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79
src/gallium/auxiliary/util/u_format_pack.py
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@ -418,31 +418,70 @@ def generate_format_pack(format, src_channel, src_native_type, src_suffix):
dst_native_type = native_type(format)
print 'static INLINE void'
print 'util_format_%s_pack_%s(void *dst, %s r, %s g, %s b, %s a)' % (name, src_suffix, src_native_type, src_native_type, src_native_type, src_native_type)
print '{'
print ' union util_format_%s pixel;' % format.short_name()
assert format.layout == PLAIN
inv_swizzle = format.inv_swizzles()
print 'static INLINE void'
print 'util_format_%s_pack_%s(void *dst, %s r, %s g, %s b, %s a)' % (name, src_suffix, src_native_type, src_native_type, src_native_type, src_native_type)
print '{'
if format.is_bitmask():
depth = format.block_size()
print ' uint%u_t value = 0;' % depth
for i in range(4):
dst_channel = format.channels[i]
width = dst_channel.size
if inv_swizzle[i] is None:
continue
value = 'rgba'[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'
print ' pixel.chan.%s = %s;' % (dst_channel.name, value)
shift = 0
for i in range(4):
dst_channel = format.channels[i]
if inv_swizzle[i] is not None:
value = 'rgba'[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'
if dst_channel.type in (UNSIGNED, SIGNED):
if shift + dst_channel.size < depth:
value = '(%s) & 0x%x' % (value, (1 << dst_channel.size) - 1)
if shift:
value = '(%s) << %u' % (value, shift)
if dst_channel.type == SIGNED:
# Cast to unsigned
value = '(uint%u_t)(%s) ' % (depth, value)
else:
value = None
if value is not None:
print ' value |= %s;' % (value)
shift += dst_channel.size
bswap_format(format)
print ' memcpy(dst, &pixel, sizeof pixel);'
print '#ifdef PIPE_ARCH_BIG_ENDIAN'
print ' value = util_bswap%u(value);' % depth
print '#endif'
print ' *(uint%u_t *)dst = value;' % depth
else:
print ' union util_format_%s pixel;' % format.short_name()
for i in range(4):
dst_channel = format.channels[i]
width = dst_channel.size
if inv_swizzle[i] is None:
continue
value = 'rgba'[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'
print ' pixel.chan.%s = %s;' % (dst_channel.name, value)
bswap_format(format)
print ' memcpy(dst, &pixel, sizeof pixel);'
print '}'
print