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-rw-r--r--src/gallium/auxiliary/util/u_format_access.py341
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diff --git a/src/gallium/auxiliary/util/u_format_access.py b/src/gallium/auxiliary/util/u_format_access.py
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--- a/src/gallium/auxiliary/util/u_format_access.py
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-#!/usr/bin/env python
-
-'''
-/**************************************************************************
- *
- * Copyright 2009 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 accessor functions.
- *
- * @author Jose Fonseca <[email protected]>
- */
-'''
-
-
-import math
-import sys
-
-from u_format_pack import *
-
-
-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.
-
- # XXX: It should be straightforward to support srgb
- if format.colorspace not in ('rgb', 'zs'):
- return False
-
- if format.layout != PLAIN:
- return False
-
- for i in range(4):
- channel = format.channels[i]
- if channel.type not in (VOID, UNSIGNED, FLOAT):
- 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
-
-
-def native_type(format):
- '''Get the native appropriate for a format.'''
-
- 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 == UNSIGNED:
- return 'uint%u_t' % channel.size
- elif channel.type == SIGNED:
- return 'int%u_t' % channel.size
- elif channel.type == FLOAT:
- if channel.size == 32:
- return 'float'
- elif channel.size == 64:
- return 'double'
- else:
- assert False
- else:
- assert False
- else:
- assert False
-
-
-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 generate_format_read(format, dst_channel, dst_native_type, dst_suffix):
- '''Generate the function to read pixels from a particular format'''
-
- name = format.short_name()
-
- src_native_type = native_type(format)
-
- print 'static void'
- print 'util_format_%s_read_%s(%s *dst, unsigned dst_stride, const uint8_t *src, unsigned src_stride, unsigned x0, unsigned y0, unsigned w, unsigned h)' % (name, dst_suffix, dst_native_type)
- print '{'
- print ' unsigned x, y;'
- print ' const uint8_t *src_row = src + y0*src_stride;'
- print ' %s *dst_row = dst;' % dst_native_type
- print ' for (y = 0; y < h; ++y) {'
- print ' const %s *src_pixel = (const %s *)(src_row + x0*%u);' % (src_native_type, src_native_type, format.stride())
- print ' %s *dst_pixel = dst_row;' %dst_native_type
- print ' for (x = 0; x < w; ++x) {'
-
- names = ['']*4
- if format.colorspace == 'rgb':
- for i in range(4):
- swizzle = format.swizzles[i]
- if swizzle < 4:
- names[swizzle] += 'rgba'[i]
- elif format.colorspace == 'zs':
- swizzle = format.swizzles[0]
- if swizzle < 4:
- names[swizzle] = 'z'
- else:
- assert False
- else:
- assert False
-
- if format.layout == PLAIN:
- if not format.is_array():
- print ' %s pixel = *src_pixel++;' % src_native_type
- shift = 0;
- for i in range(4):
- src_channel = format.channels[i]
- width = src_channel.size
- if names[i]:
- value = 'pixel'
- mask = (1 << width) - 1
- if shift:
- value = '(%s >> %u)' % (value, shift)
- if shift + width < format.block_size():
- value = '(%s & 0x%x)' % (value, mask)
- value = conversion_expr(src_channel, dst_channel, dst_native_type, value)
- print ' %s %s = %s;' % (dst_native_type, names[i], value)
- shift += width
- else:
- for i in range(4):
- src_channel = format.channels[i]
- if names[i]:
- value = 'src_pixel[%u]' % i
- value = conversion_expr(src_channel, dst_channel, dst_native_type, value)
- print ' %s %s = %s;' % (dst_native_type, names[i], value)
- print ' src_pixel += %u;' % (format.nr_channels())
- else:
- assert False
-
- for i in range(4):
- if format.colorspace == 'rgb':
- swizzle = format.swizzles[i]
- if swizzle < 4:
- value = names[swizzle]
- elif swizzle == SWIZZLE_0:
- value = '0'
- elif swizzle == SWIZZLE_1:
- value = get_one(dst_channel)
- else:
- assert False
- elif format.colorspace == 'zs':
- if i < 3:
- value = 'z'
- else:
- value = get_one(dst_channel)
- else:
- assert False
- print ' *dst_pixel++ = %s; /* %s */' % (value, 'rgba'[i])
-
- print ' }'
- print ' src_row += src_stride;'
- print ' dst_row += dst_stride/sizeof(*dst_row);'
- print ' }'
- print '}'
- print
-
-
-def generate_format_write(format, src_channel, src_native_type, src_suffix):
- '''Generate the function to write pixels to a particular format'''
-
- name = format.short_name()
-
- dst_native_type = native_type(format)
-
- print 'static void'
- print 'util_format_%s_write_%s(const %s *src, unsigned src_stride, uint8_t *dst, unsigned dst_stride, unsigned x0, unsigned y0, unsigned w, unsigned h)' % (name, src_suffix, src_native_type)
- print '{'
- print ' unsigned x, y;'
- print ' uint8_t *dst_row = dst + y0*dst_stride;'
- print ' const %s *src_row = src;' % src_native_type
- print ' for (y = 0; y < h; ++y) {'
- print ' %s *dst_pixel = (%s *)(dst_row + x0*%u);' % (dst_native_type, dst_native_type, format.stride())
- print ' const %s *src_pixel = src_row;' %src_native_type
- print ' for (x = 0; x < w; ++x) {'
-
- inv_swizzle = format.inv_swizzles()
-
- if format.layout == PLAIN:
- if not format.is_array():
- print ' %s pixel = 0;' % dst_native_type
- shift = 0;
- for i in range(4):
- dst_channel = format.channels[i]
- width = dst_channel.size
- if inv_swizzle[i] is not None:
- value = 'src_pixel[%u]' % inv_swizzle[i]
- value = conversion_expr(src_channel, dst_channel, dst_native_type, value)
- if shift:
- value = '(%s << %u)' % (value, shift)
- print ' pixel |= %s;' % value
- shift += width
- print ' *dst_pixel++ = pixel;'
- else:
- for i in range(4):
- dst_channel = format.channels[i]
- if inv_swizzle[i] is not None:
- value = 'src_pixel[%u]' % inv_swizzle[i]
- value = conversion_expr(src_channel, dst_channel, dst_native_type, value)
- print ' *dst_pixel++ = %s;' % value
- else:
- assert False
- print ' src_pixel += 4;'
-
- print ' }'
- print ' dst_row += dst_stride;'
- print ' src_row += src_stride/sizeof(*src_row);'
- print ' }'
- print '}'
- print
-
-
-def generate_read(formats, dst_channel, dst_native_type, dst_suffix):
- '''Generate the dispatch function to read pixels from any format'''
-
- for format in formats:
- if is_format_supported(format):
- generate_format_read(format, dst_channel, dst_native_type, dst_suffix)
-
- print 'void'
- print 'util_format_read_%s(enum pipe_format format, %s *dst, unsigned dst_stride, const void *src, unsigned src_stride, unsigned x, unsigned y, unsigned w, unsigned h)' % (dst_suffix, dst_native_type)
- print '{'
- print ' void (*func)(%s *dst, unsigned dst_stride, const uint8_t *src, unsigned src_stride, unsigned x0, unsigned y0, unsigned w, unsigned h);' % dst_native_type
- print ' switch(format) {'
- for format in formats:
- if is_format_supported(format):
- print ' case %s:' % format.name
- print ' func = &util_format_%s_read_%s;' % (format.short_name(), dst_suffix)
- print ' break;'
- print ' default:'
- print ' debug_printf("unsupported format\\n");'
- print ' return;'
- print ' }'
- print ' func(dst, dst_stride, (const uint8_t *)src, src_stride, x, y, w, h);'
- print '}'
- print
-
-
-def generate_write(formats, src_channel, src_native_type, src_suffix):
- '''Generate the dispatch function to write pixels to any format'''
-
- for format in formats:
- if is_format_supported(format):
- generate_format_write(format, src_channel, src_native_type, src_suffix)
-
- print 'void'
- print 'util_format_write_%s(enum pipe_format format, const %s *src, unsigned src_stride, void *dst, unsigned dst_stride, unsigned x, unsigned y, unsigned w, unsigned h)' % (src_suffix, src_native_type)
-
- print '{'
- print ' void (*func)(const %s *src, unsigned src_stride, uint8_t *dst, unsigned dst_stride, unsigned x0, unsigned y0, unsigned w, unsigned h);' % src_native_type
- print ' switch(format) {'
- for format in formats:
- if is_format_supported(format):
- print ' case %s:' % format.name
- print ' func = &util_format_%s_write_%s;' % (format.short_name(), src_suffix)
- print ' break;'
- print ' default:'
- print ' debug_printf("unsupported format\\n");'
- print ' return;'
- print ' }'
- print ' func(src, src_stride, (uint8_t *)dst, dst_stride, x, y, w, h);'
- print '}'
- print
-
-
-def main():
- formats = []
- for arg in sys.argv[1:]:
- formats.extend(parse(arg))
-
- print '/* This file is autogenerated by u_format_access.py from u_format.csv. Do not edit directly. */'
- print
- # This will print the copyright message on the top of this file
- print __doc__.strip()
- print
- print '#include "pipe/p_compiler.h"'
- print '#include "u_math.h"'
- print '#include "u_format_pack.h"'
- print
-
- generate_srgb_tables()
-
- type = Channel(FLOAT, False, 32)
- native_type = 'float'
- suffix = '4f'
-
- generate_read(formats, type, native_type, suffix)
- generate_write(formats, type, native_type, suffix)
-
- type = Channel(UNSIGNED, True, 8)
- native_type = 'uint8_t'
- suffix = '4ub'
-
- generate_read(formats, type, native_type, suffix)
- generate_write(formats, type, native_type, suffix)
-
-
-if __name__ == '__main__':
- main()
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-11 18:28:58 +0000