src/mesa/main/format_info.py

   1 #!/usr/bin/env python
   2 #
   3 # Copyright 2014 Intel Corporation
   4 #
   5 # Permission is hereby granted, free of charge, to any person obtaining a
   6 # copy of this software and associated documentation files (the
   7 # "Software"), to deal in the Software without restriction, including
   8 # without limitation the rights to use, copy, modify, merge, publish,
   9 # distribute, sub license, and/or sell copies of the Software, and to
  10 # permit persons to whom the Software is furnished to do so, subject to
  11 # the following conditions:
  12 #
  13 # The above copyright notice and this permission notice (including the
  14 # next paragraph) shall be included in all copies or substantial portions
  15 # of the Software.
  16 #
  17 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  20 # IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  21 # ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  22 # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  23 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24
  25 import format_parser as parser
  26 import sys
  27
  28 def get_gl_base_format(fmat):
  29    if fmat.name == 'MESA_FORMAT_NONE':
  30       return 'GL_NONE'
  31    elif fmat.name in ['MESA_FORMAT_YCBCR', 'MESA_FORMAT_YCBCR_REV']:
  32       return 'GL_YCBCR_MESA'
  33    elif fmat.has_channel('r'):
  34       if fmat.has_channel('g'):
  35          if fmat.has_channel('b'):
  36             if fmat.has_channel('a'):
  37                return 'GL_RGBA'
  38             else:
  39                return 'GL_RGB'
  40          else:
  41             return 'GL_RG'
  42       else:
  43          return 'GL_RED'
  44    elif fmat.has_channel('l'):
  45       if fmat.has_channel('a'):
  46          return 'GL_LUMINANCE_ALPHA'
  47       else:
  48          return 'GL_LUMINANCE'
  49    elif fmat.has_channel('a') and fmat.num_channels() == 1:
  50       return 'GL_ALPHA'
  51    elif fmat.has_channel('z'):
  52       if fmat.has_channel('s'):
  53          return 'GL_DEPTH_STENCIL'
  54       else:
  55          return 'GL_DEPTH_COMPONENT'
  56    elif fmat.has_channel('s'):
  57       return 'GL_STENCIL_INDEX'
  58    elif fmat.has_channel('i') and fmat.num_channels() == 1:
  59       return 'GL_INTENSITY'
  60    else:
  61       sys.exit("error, could not determine base format for {0}, check swizzle".format(fmat.name));
  62
  63 def get_gl_data_type(fmat):
  64    if fmat.is_compressed():
  65       if 'FLOAT' in fmat.name:
  66          return 'GL_FLOAT'
  67       elif 'SIGNED' in fmat.name or 'SNORM' in fmat.name:
  68          return 'GL_SIGNED_NORMALIZED'
  69       else:
  70          return 'GL_UNSIGNED_NORMALIZED'
  71    elif fmat.name in ['MESA_FORMAT_YCBCR', 'MESA_FORMAT_YCBCR_REV']:
  72       return 'GL_UNSIGNED_NORMALIZED'
  73
  74    channel = None
  75    for chan in fmat.channels:
  76       if chan.type == 'x' and len(fmat.channels) > 1:
  77          continue # We can do better
  78       elif chan.name == 's' and fmat.has_channel('z'):
  79          continue # We'll use the type from the depth instead
  80
  81       channel = chan
  82       break;
  83
  84    if channel.type == parser.UNSIGNED:
  85       if channel.norm:
  86          return 'GL_UNSIGNED_NORMALIZED'
  87       else:
  88          return 'GL_UNSIGNED_INT'
  89    elif channel.type == parser.SIGNED:
  90       if channel.norm:
  91          return 'GL_SIGNED_NORMALIZED'
  92       else:
  93          return 'GL_INT'
  94    elif channel.type == parser.FLOAT:
  95       return 'GL_FLOAT'
  96    elif channel.type == parser.VOID:
  97       return 'GL_NONE'
  98    else:
  99       assert False
 100
 101 def get_channel_bits(fmat, chan_name):
 102    if fmat.is_compressed():
 103       # These values are pretty-much bogus, but OpenGL requires that we
 104       # return an "approximate" number of bits.
 105       if fmat.layout == 's3tc':
 106          return 4 if fmat.has_channel(chan_name) else 0
 107       elif fmat.layout == 'fxt1':
 108          if chan_name in 'rgb':
 109             return 4
 110          elif chan_name == 'a':
 111             return 1 if fmat.has_channel('a') else 0
 112          else:
 113             return 0
 114       elif fmat.layout == 'rgtc':
 115          return 8 if fmat.has_channel(chan_name) else 0
 116       elif fmat.layout in ('etc1', 'etc2'):
 117          if fmat.name.endswith('_ALPHA1') and chan_name == 'a':
 118             return 1
 119
 120          bits = 11 if fmat.name.endswith('11_EAC') else 8
 121          return bits if fmat.has_channel(chan_name) else 0
 122       elif fmat.layout == 'bptc':
 123          bits = 16 if fmat.name.endswith('_FLOAT') else 8
 124          return bits if fmat.has_channel(chan_name) else 0
 125       else:
 126          assert False
 127    else:
 128       # Uncompressed textures
 129       for chan in fmat.channels:
 130          if chan.name == chan_name:
 131             return chan.size
 132       return 0
 133
 134 formats = parser.parse(sys.argv[1])
 135
 136 print '''
 137 /*
 138  * Mesa 3-D graphics library
 139  *
 140  * Copyright (c) 2014 Intel Corporation
 141  *
 142  * Permission is hereby granted, free of charge, to any person obtaining a
 143  * copy of this software and associated documentation files (the "Software"),
 144  * to deal in the Software without restriction, including without limitation
 145  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 146  * and/or sell copies of the Software, and to permit persons to whom the
 147  * Software is furnished to do so, subject to the following conditions:
 148  *
 149  * The above copyright notice and this permission notice shall be included
 150  * in all copies or substantial portions of the Software.
 151  *
 152  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 153  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 154  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 155  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 156  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 157  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 158  * OTHER DEALINGS IN THE SOFTWARE.
 159  */
 160
 161  /*
 162   * This file is AUTOGENERATED by format_info.py.  Do not edit it
 163   * manually or commit it into version control.
 164   */
 165
 166 static struct gl_format_info format_info[MESA_FORMAT_COUNT] =
 167 {
 168 '''
 169
 170 for fmat in formats:
 171    print '   {'
 172    print '      {0},'.format(fmat.name)
 173    print '      "{0}",'.format(fmat.name)
 174    print '      {0},'.format('MESA_FORMAT_LAYOUT_' + fmat.layout.upper())
 175    print '      {0},'.format(get_gl_base_format(fmat))
 176    print '      {0},'.format(get_gl_data_type(fmat))
 177
 178    bits = [ get_channel_bits(fmat, name) for name in ['r', 'g', 'b', 'a']]
 179    print '      {0},'.format(', '.join(map(str, bits)))
 180    bits = [ get_channel_bits(fmat, name) for name in ['l', 'i', 'z', 's']]
 181    print '      {0},'.format(', '.join(map(str, bits)))
 182
 183    print '      {0:d},'.format(fmat.colorspace == 'srgb')
 184
 185    print '      {0}, {1}, {2},'.format(fmat.block_width, fmat.block_height,
 186                                        int(fmat.block_size() / 8))
 187
 188    print '      {{ {0} }},'.format(', '.join(map(str, fmat.swizzle)))
 189    if fmat.is_array():
 190       chan = fmat.array_element()
 191       norm = chan.norm or chan.type == parser.FLOAT
 192       print '      MESA_ARRAY_FORMAT({0}),'.format(', '.join([
 193          str(chan.size / 8),
 194          str(int(chan.sign)),
 195          str(int(chan.type == parser.FLOAT)),
 196          str(int(norm)),
 197          str(len(fmat.channels)),
 198          str(fmat.swizzle[0]),
 199          str(fmat.swizzle[1]),
 200          str(fmat.swizzle[2]),
 201          str(fmat.swizzle[3]),
 202       ]))
 203    else:
 204       print '      0,'
 205    print '   },'
 206
 207 print '};'