| #!/usr/bin/env python |
| |
| ''' |
| /************************************************************************** |
| * |
| * Copyright 2009-2010 VMware, Inc. |
| * All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sub license, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial portions |
| * of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
| * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR |
| * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| * |
| **************************************************************************/ |
| |
| /** |
| * @file |
| * Pixel format packing and unpacking functions. |
| * |
| * @author Jose Fonseca <jfonseca@vmware.com> |
| */ |
| ''' |
| |
| |
| 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.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 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 in (SIGNED, FIXED): |
| print ' int %s:%u;' % (channel.name, channel.size) |
| elif channel.type == FLOAT: |
| 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) |
| else: |
| assert 0 |
| else: |
| assert channel.size % 8 == 0 and is_pot(channel.size) |
| if channel.type == VOID: |
| if channel.size: |
| print ' uint%u_t %s;' % (channel.size, channel.name) |
| elif channel.type == UNSIGNED: |
| print ' uint%u_t %s;' % (channel.size, channel.name) |
| elif channel.type in (SIGNED, FIXED): |
| print ' int%u_t %s;' % (channel.size, channel.name) |
| elif channel.type == FLOAT: |
| if channel.size == 64: |
| print ' double %s;' % (channel.name) |
| elif channel.size == 32: |
| print ' float %s;' % (channel.name) |
| elif channel.size == 16: |
| print ' uint16_t %s;' % (channel.name) |
| else: |
| assert 0 |
| else: |
| assert 0 |
| print ' } chan;' |
| print '};' |
| print |
| |
| |
| def bswap_format(format): |
| '''Generate a structure that describes the format.''' |
| |
| if format.is_bitmask() and not format.is_array() and format.block_size() > 8: |
| print '#ifdef PIPE_ARCH_BIG_ENDIAN' |
| print ' pixel.value = util_bswap%u(pixel.value);' % format.block_size() |
| print '#endif' |
| |
| |
| def is_format_supported(format): |
| '''Determines whether we actually have the plumbing necessary to generate the |
| to read/write to/from this format.''' |
| |
| # FIXME: Ideally we would support any format combination here. |
| |
| if format.layout != PLAIN: |
| return False |
| |
| for i in range(4): |
| channel = format.channels[i] |
| 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 |
| |
| return True |
| |
| def is_format_pure_unsigned(format): |
| for i in range(4): |
| channel = format.channels[i] |
| if channel.type not in (VOID, UNSIGNED): |
| return False |
| if channel.type == UNSIGNED and channel.pure == False: |
| return False |
| |
| return True |
| |
| |
| def is_format_pure_signed(format): |
| for i in range(4): |
| channel = format.channels[i] |
| if channel.type not in (VOID, SIGNED): |
| return False |
| if channel.type == SIGNED and channel.pure == False: |
| return False |
| |
| return True |
| |
| def native_type(format): |
| '''Get the native appropriate for a format.''' |
| |
| if format.name == 'PIPE_FORMAT_R11G11B10_FLOAT': |
| return 'uint32_t' |
| if format.name == 'PIPE_FORMAT_R9G9B9E5_FLOAT': |
| return 'uint32_t' |
| |
| if format.layout == PLAIN: |
| if not format.is_array(): |
| # For arithmetic pixel formats return the integer type that matches the whole pixel |
| return 'uint%u_t' % format.block_size() |
| else: |
| # For array pixel formats return the integer type that matches the color channel |
| channel = format.channels[0] |
| if channel.type in (UNSIGNED, VOID): |
| return 'uint%u_t' % channel.size |
| elif channel.type in (SIGNED, FIXED): |
| return 'int%u_t' % channel.size |
| elif channel.type == FLOAT: |
| if channel.size == 16: |
| return 'uint16_t' |
| elif channel.size == 32: |
| return 'float' |
| elif channel.size == 64: |
| return 'double' |
| else: |
| assert False |
| else: |
| assert False |
| else: |
| assert False |
| |
| |
| def intermediate_native_type(bits, sign): |
| '''Find a native type adequate to hold intermediate results of the request bit size.''' |
| |
| bytes = 4 # don't use anything smaller than 32bits |
| while bytes * 8 < bits: |
| bytes *= 2 |
| bits = bytes*8 |
| |
| if sign: |
| return 'int%u_t' % bits |
| else: |
| return 'uint%u_t' % bits |
| |
| |
| def get_one_shift(type): |
| '''Get the number of the bit that matches unity for this type.''' |
| if type.type == 'FLOAT': |
| assert False |
| if not type.norm: |
| return 0 |
| if type.type == UNSIGNED: |
| return type.size |
| if type.type == SIGNED: |
| return type.size - 1 |
| if type.type == FIXED: |
| return type.size / 2 |
| assert False |
| |
| |
| def value_to_native(type, value): |
| '''Get the value of unity for this type.''' |
| 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 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): |
| '''Generate the expression to clamp the value in the source type to the |
| destination type range.''' |
| |
| if src_channel == dst_channel: |
| return value |
| |
| src_min = src_channel.min() |
| 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_native, dst_max_native) |
| |
| if src_max > dst_max: |
| return 'MIN2(%s, %s)' % (value, dst_max_native) |
| |
| if src_min < 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, |
| 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 |
| |
| src_type = src_channel.type |
| src_size = src_channel.size |
| src_norm = src_channel.norm |
| src_pure = src_channel.pure |
| |
| # Promote half to float |
| if src_type == FLOAT and src_size == 16: |
| 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) |
| |
| if src_type in (SIGNED, UNSIGNED) and dst_channel.type in (SIGNED, UNSIGNED): |
| if not src_norm and not dst_channel.norm: |
| # neither is normalized -- just cast |
| return '(%s)%s' % (dst_native_type, value) |
| |
| src_one = get_one(src_channel) |
| dst_one = get_one(dst_channel) |
| |
| if src_one > dst_one and src_norm and dst_channel.norm: |
| # We can just bitshift |
| src_shift = get_one_shift(src_channel) |
| dst_shift = get_one_shift(dst_channel) |
| value = '(%s >> %s)' % (value, src_shift - dst_shift) |
| else: |
| # We need to rescale using an intermediate type big enough to hold the multiplication of both |
| tmp_native_type = intermediate_native_type(src_size + dst_channel.size, src_channel.sign and dst_channel.sign) |
| value = '((%s)%s)' % (tmp_native_type, value) |
| value = '(%s * 0x%x / 0x%x)' % (value, dst_one, src_one) |
| value = '(%s)%s' % (dst_native_type, value) |
| return value |
| |
| # Promote to either float or double |
| if src_type != FLOAT: |
| if src_norm or src_type == FIXED: |
| one = get_one(src_channel) |
| if src_size <= 23: |
| value = '(%s * (1.0f/0x%x))' % (value, one) |
| if dst_channel.size <= 32: |
| value = '(float)%s' % value |
| src_size = 32 |
| else: |
| # bigger than single precision mantissa, use double |
| value = '(%s * (1.0/0x%x))' % (value, one) |
| src_size = 64 |
| src_norm = False |
| else: |
| if src_size <= 23 or dst_channel.size <= 32: |
| value = '(float)%s' % value |
| src_size = 32 |
| else: |
| # bigger than single precision mantissa, use double |
| value = '(double)%s' % value |
| src_size = 64 |
| src_type = FLOAT |
| |
| # Convert double or float to non-float |
| if dst_channel.type != FLOAT: |
| 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) |
| else: |
| # bigger than single precision mantissa, use double |
| value = '(%s * (double)0x%x)' % (value, dst_one) |
| value = '(%s)%s' % (dst_native_type, value) |
| else: |
| # Cast double to float when converting to either half or float |
| if dst_channel.size <= 32 and src_size > 32: |
| value = '(float)%s' % value |
| src_size = 32 |
| |
| if dst_channel.size == 16: |
| value = 'util_float_to_half(%s)' % value |
| elif dst_channel.size == 64 and src_size < 64: |
| value = '(double)%s' % value |
| |
| return value |
| |
| |
| def generate_unpack_kernel(format, dst_channel, dst_native_type): |
| |
| if not is_format_supported(format): |
| return |
| |
| assert format.layout == PLAIN |
| |
| src_native_type = native_type(format) |
| |
| if format.is_bitmask(): |
| depth = format.block_size() |
| print ' uint%u_t value = *(const uint%u_t *)src;' % (depth, depth) |
| |
| # Declare the intermediate variables |
| for i in range(format.nr_channels()): |
| src_channel = format.channels[i] |
| if src_channel.type == UNSIGNED: |
| print ' uint%u_t %s;' % (depth, src_channel.name) |
| elif src_channel.type == SIGNED: |
| print ' int%u_t %s;' % (depth, src_channel.name) |
| |
| if depth > 8: |
| print '#ifdef PIPE_ARCH_BIG_ENDIAN' |
| print ' value = util_bswap%u(value);' % depth |
| print '#endif' |
| |
| # Compute the intermediate unshifted values |
| shift = 0 |
| for i in range(format.nr_channels()): |
| src_channel = format.channels[i] |
| value = 'value' |
| if src_channel.type == UNSIGNED: |
| if shift: |
| value = '%s >> %u' % (value, shift) |
| if shift + src_channel.size < depth: |
| value = '(%s) & 0x%x' % (value, (1 << src_channel.size) - 1) |
| elif src_channel.type == SIGNED: |
| if shift + src_channel.size < depth: |
| # Align the sign bit |
| lshift = depth - (shift + src_channel.size) |
| value = '%s << %u' % (value, lshift) |
| # Cast to signed |
| value = '(int%u_t)(%s) ' % (depth, value) |
| if src_channel.size < depth: |
| # Align the LSB bit |
| rshift = depth - src_channel.size |
| value = '(%s) >> %u' % (value, rshift) |
| else: |
| value = None |
| |
| if value is not None: |
| print ' %s = %s;' % (src_channel.name, value) |
| |
| shift += src_channel.size |
| |
| # Convert, swizzle, and store final values |
| for i in range(4): |
| 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, |
| src_colorspace = src_colorspace) |
| elif swizzle == SWIZZLE_0: |
| value = '0' |
| elif swizzle == SWIZZLE_1: |
| value = get_one(dst_channel) |
| elif swizzle == SWIZZLE_NONE: |
| value = '0' |
| else: |
| assert False |
| print ' dst[%u] = %s; /* %s */' % (i, value, 'rgba'[i]) |
| |
| else: |
| print ' union util_format_%s pixel;' % format.short_name() |
| print ' memcpy(&pixel, src, sizeof pixel);' |
| bswap_format(format) |
| |
| for i in range(4): |
| 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, |
| src_colorspace = src_colorspace) |
| elif swizzle == SWIZZLE_0: |
| value = '0' |
| elif swizzle == SWIZZLE_1: |
| value = get_one(dst_channel) |
| elif swizzle == SWIZZLE_NONE: |
| value = '0' |
| else: |
| assert False |
| print ' dst[%u] = %s; /* %s */' % (i, value, 'rgba'[i]) |
| |
| |
| def generate_pack_kernel(format, src_channel, src_native_type): |
| |
| if not is_format_supported(format): |
| return |
| |
| dst_native_type = native_type(format) |
| |
| assert format.layout == PLAIN |
| |
| inv_swizzle = format.inv_swizzles() |
| |
| if format.is_bitmask(): |
| depth = format.block_size() |
| print ' uint%u_t value = 0;' % depth |
| |
| shift = 0 |
| for i in range(4): |
| dst_channel = format.channels[i] |
| if inv_swizzle[i] is not None: |
| value ='src[%u]' % inv_swizzle[i] |
| 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) |
| 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 |
| |
| if depth > 8: |
| 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 |
| 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, |
| dst_colorspace = dst_colorspace) |
| print ' pixel.chan.%s = %s;' % (dst_channel.name, value) |
| |
| bswap_format(format) |
| print ' memcpy(dst, &pixel, sizeof pixel);' |
| |
| |
| def generate_format_unpack(format, dst_channel, dst_native_type, dst_suffix): |
| '''Generate the function to unpack pixels from a particular format''' |
| |
| name = format.short_name() |
| |
| print 'static INLINE void' |
| print 'util_format_%s_unpack_%s(%s *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height)' % (name, dst_suffix, dst_native_type) |
| print '{' |
| |
| if is_format_supported(format): |
| print ' unsigned x, y;' |
| print ' for(y = 0; y < height; y += %u) {' % (format.block_height,) |
| print ' %s *dst = dst_row;' % (dst_native_type) |
| print ' const uint8_t *src = src_row;' |
| print ' for(x = 0; x < width; x += %u) {' % (format.block_width,) |
| |
| generate_unpack_kernel(format, dst_channel, dst_native_type) |
| |
| print ' src += %u;' % (format.block_size() / 8,) |
| print ' dst += 4;' |
| print ' }' |
| print ' src_row += src_stride;' |
| print ' dst_row += dst_stride/sizeof(*dst_row);' |
| print ' }' |
| |
| print '}' |
| print |
| |
| |
| def generate_format_pack(format, src_channel, src_native_type, src_suffix): |
| '''Generate the function to pack pixels to a particular format''' |
| |
| name = format.short_name() |
| |
| print 'static INLINE void' |
| print 'util_format_%s_pack_%s(uint8_t *dst_row, unsigned dst_stride, const %s *src_row, unsigned src_stride, unsigned width, unsigned height)' % (name, src_suffix, src_native_type) |
| print '{' |
| |
| if is_format_supported(format): |
| print ' unsigned x, y;' |
| print ' for(y = 0; y < height; y += %u) {' % (format.block_height,) |
| print ' const %s *src = src_row;' % (src_native_type) |
| print ' uint8_t *dst = dst_row;' |
| print ' for(x = 0; x < width; x += %u) {' % (format.block_width,) |
| |
| generate_pack_kernel(format, src_channel, src_native_type) |
| |
| print ' src += 4;' |
| print ' dst += %u;' % (format.block_size() / 8,) |
| print ' }' |
| print ' dst_row += dst_stride;' |
| print ' src_row += src_stride/sizeof(*src_row);' |
| print ' }' |
| |
| print '}' |
| print |
| |
| |
| def generate_format_fetch(format, dst_channel, dst_native_type, dst_suffix): |
| '''Generate the function to unpack pixels from a particular format''' |
| |
| name = format.short_name() |
| |
| print 'static INLINE void' |
| print 'util_format_%s_fetch_%s(%s *dst, const uint8_t *src, unsigned i, unsigned j)' % (name, dst_suffix, dst_native_type) |
| print '{' |
| |
| if is_format_supported(format): |
| generate_unpack_kernel(format, dst_channel, dst_native_type) |
| |
| print '}' |
| print |
| |
| |
| def is_format_hand_written(format): |
| return format.layout in ('s3tc', 'rgtc', 'etc', 'subsampled', 'other') or format.colorspace == ZS |
| |
| |
| def generate(formats): |
| print |
| print '#include "pipe/p_compiler.h"' |
| print '#include "u_math.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 not is_format_hand_written(format): |
| |
| if is_format_supported(format): |
| generate_format_type(format) |
| |
| if is_format_pure_unsigned(format): |
| native_type = 'unsigned' |
| suffix = 'unsigned' |
| channel = Channel(UNSIGNED, False, True, 32) |
| |
| 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(SIGNED, False, True, 32) |
| native_type = 'int' |
| suffix = 'signed' |
| generate_format_unpack(format, channel, native_type, suffix) |
| generate_format_pack(format, channel, native_type, suffix) |
| elif is_format_pure_signed(format): |
| native_type = 'int' |
| suffix = 'signed' |
| channel = Channel(SIGNED, False, True, 32) |
| |
| generate_format_unpack(format, channel, native_type, suffix) |
| generate_format_pack(format, channel, native_type, suffix) |
| generate_format_fetch(format, channel, native_type, suffix) |
| |
| native_type = 'unsigned' |
| suffix = 'unsigned' |
| channel = Channel(UNSIGNED, False, True, 32) |
| generate_format_unpack(format, channel, native_type, suffix) |
| generate_format_pack(format, channel, native_type, suffix) |
| else: |
| channel = Channel(FLOAT, False, False, 32) |
| native_type = 'float' |
| suffix = 'rgba_float' |
| |
| 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, False, 8) |
| native_type = 'uint8_t' |
| suffix = 'rgba_8unorm' |
| |
| generate_format_unpack(format, channel, native_type, suffix) |
| generate_format_pack(format, channel, native_type, suffix) |
| |
