src/mapi/glapi/gen/gl_genexec.py

   1 #!/usr/bin/env python
   2
   3 # Copyright (C) 2012 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 "Software"),
   7 # to deal in the Software without restriction, including without limitation
   8 # the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9 # and/or sell copies of the Software, and to permit persons to whom the
  10 # Software is furnished to do so, subject to the following conditions:
  11 #
  12 # The above copyright notice and this permission notice (including the next
  13 # paragraph) shall be included in all copies or substantial portions of the
  14 # Software.
  15 #
  16 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19 # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  22 # IN THE SOFTWARE.
  23
  24 # This script generates the file api_exec.c, which contains
  25 # _mesa_initialize_exec_table().  It is responsible for populating all
  26 # entries in the "exec" dispatch table that aren't dynamic.
  27
  28 import argparse
  29 import collections
  30 import license
  31 import gl_XML
  32 import sys
  33 import apiexec
  34
  35
  36 exec_flavor_map = {
  37     'dynamic': None,
  38     'mesa': '_mesa_',
  39     'skip': None,
  40     }
  41
  42
  43 header = """/**
  44  * \\file api_exec.c
  45  * Initialize dispatch table.
  46  */
  47
  48
  49 #include "main/accum.h"
  50 #include "main/api_loopback.h"
  51 #include "main/api_exec.h"
  52 #include "main/arbprogram.h"
  53 #include "main/atifragshader.h"
  54 #include "main/attrib.h"
  55 #include "main/blend.h"
  56 #include "main/blit.h"
  57 #include "main/bufferobj.h"
  58 #include "main/arrayobj.h"
  59 #include "main/buffers.h"
  60 #include "main/clear.h"
  61 #include "main/clip.h"
  62 #include "main/colortab.h"
  63 #include "main/compute.h"
  64 #include "main/condrender.h"
  65 #include "main/context.h"
  66 #include "main/convolve.h"
  67 #include "main/copyimage.h"
  68 #include "main/depth.h"
  69 #include "main/dlist.h"
  70 #include "main/drawpix.h"
  71 #include "main/drawtex.h"
  72 #include "main/rastpos.h"
  73 #include "main/enable.h"
  74 #include "main/errors.h"
  75 #include "main/es1_conversion.h"
  76 #include "main/eval.h"
  77 #include "main/get.h"
  78 #include "main/feedback.h"
  79 #include "main/fog.h"
  80 #include "main/fbobject.h"
  81 #include "main/framebuffer.h"
  82 #include "main/genmipmap.h"
  83 #include "main/hint.h"
  84 #include "main/histogram.h"
  85 #include "main/imports.h"
  86 #include "main/light.h"
  87 #include "main/lines.h"
  88 #include "main/matrix.h"
  89 #include "main/multisample.h"
  90 #include "main/objectlabel.h"
  91 #include "main/performance_monitor.h"
  92 #include "main/pipelineobj.h"
  93 #include "main/pixel.h"
  94 #include "main/pixelstore.h"
  95 #include "main/points.h"
  96 #include "main/polygon.h"
  97 #include "main/program_resource.h"
  98 #include "main/querymatrix.h"
  99 #include "main/queryobj.h"
 100 #include "main/readpix.h"
 101 #include "main/samplerobj.h"
 102 #include "main/scissor.h"
 103 #include "main/stencil.h"
 104 #include "main/texenv.h"
 105 #include "main/texgetimage.h"
 106 #include "main/teximage.h"
 107 #include "main/texgen.h"
 108 #include "main/texobj.h"
 109 #include "main/texparam.h"
 110 #include "main/texstate.h"
 111 #include "main/texstorage.h"
 112 #include "main/texturebarrier.h"
 113 #include "main/textureview.h"
 114 #include "main/transformfeedback.h"
 115 #include "main/mtypes.h"
 116 #include "main/varray.h"
 117 #include "main/viewport.h"
 118 #include "main/shaderapi.h"
 119 #include "main/shaderimage.h"
 120 #include "main/uniforms.h"
 121 #include "main/syncobj.h"
 122 #include "main/formatquery.h"
 123 #include "main/dispatch.h"
 124 #include "main/vdpau.h"
 125 #include "vbo/vbo.h"
 126
 127
 128 /**
 129  * Initialize a context's exec table with pointers to Mesa's supported
 130  * GL functions.
 131  *
 132  * This function depends on ctx->Version.
 133  *
 134  * \param ctx  GL context to which \c exec belongs.
 135  */
 136 void
 137 _mesa_initialize_exec_table(struct gl_context *ctx)
 138 {
 139    struct _glapi_table *exec;
 140
 141    exec = ctx->Exec;
 142    assert(exec != NULL);
 143
 144    assert(ctx->Version > 0);
 145
 146    vbo_initialize_exec_dispatch(ctx, exec);
 147 """
 148
 149
 150 footer = """
 151 }
 152 """
 153
 154
 155 class PrintCode(gl_XML.gl_print_base):
 156
 157     def __init__(self):
 158         gl_XML.gl_print_base.__init__(self)
 159
 160         self.name = 'gl_genexec.py'
 161         self.license = license.bsd_license_template % (
 162             'Copyright (C) 2012 Intel Corporation',
 163             'Intel Corporation')
 164
 165     def printRealHeader(self):
 166         print header
 167
 168     def printRealFooter(self):
 169         print footer
 170
 171     def printBody(self, api):
 172         # Collect SET_* calls by the condition under which they should
 173         # be called.
 174         settings_by_condition = collections.defaultdict(lambda: [])
 175         for f in api.functionIterateAll():
 176             if f.exec_flavor not in exec_flavor_map:
 177                 raise Exception(
 178                     'Unrecognized exec flavor {0!r}'.format(f.exec_flavor))
 179             condition_parts = []
 180             if f.name in apiexec.functions:
 181                 ex = apiexec.functions[f.name]
 182                 unconditional_count = 0
 183
 184                 if ex.compatibility is not None:
 185                     condition_parts.append('ctx->API == API_OPENGL_COMPAT')
 186                     unconditional_count += 1
 187
 188                 if ex.core is not None:
 189                     condition_parts.append('ctx->API == API_OPENGL_CORE')
 190                     unconditional_count += 1
 191
 192                 if ex.es1 is not None:
 193                     condition_parts.append('ctx->API == API_OPENGLES')
 194                     unconditional_count += 1
 195
 196                 if ex.es2 is not None:
 197                     if ex.es2 > 20:
 198                         condition_parts.append('(ctx->API == API_OPENGLES2 && ctx->Version >= {0})'.format(ex.es2))
 199                     else:
 200                         condition_parts.append('ctx->API == API_OPENGLES2')
 201                         unconditional_count += 1
 202
 203                 # If the function is unconditionally available in all four
 204                 # APIs, then it is always available.  Replace the complex
 205                 # tautology condition with "true" and let GCC do the right
 206                 # thing.
 207                 if unconditional_count == 4:
 208                     condition_parts = ['true']
 209             else:
 210                 if f.desktop:
 211                     if f.deprecated:
 212                         condition_parts.append('ctx->API == API_OPENGL_COMPAT')
 213                     else:
 214                         condition_parts.append('_mesa_is_desktop_gl(ctx)')
 215                 if 'es1' in f.api_map:
 216                     condition_parts.append('ctx->API == API_OPENGLES')
 217                 if 'es2' in f.api_map:
 218                     if f.api_map['es2'] > 2.0:
 219                         condition_parts.append('(ctx->API == API_OPENGLES2 && ctx->Version >= {0})'.format(int(f.api_map['es2'] * 10)))
 220                     else:
 221                         condition_parts.append('ctx->API == API_OPENGLES2')
 222
 223             if not condition_parts:
 224                 # This function does not exist in any API.
 225                 continue
 226             condition = ' || '.join(condition_parts)
 227             prefix = exec_flavor_map[f.exec_flavor]
 228             if prefix is None:
 229                 # This function is not implemented, or is dispatched
 230                 # dynamically.
 231                 continue
 232             settings_by_condition[condition].append(
 233                 'SET_{0}(exec, {1}{0});'.format(f.name, prefix, f.name))
 234         # Print out an if statement for each unique condition, with
 235         # the SET_* calls nested inside it.
 236         for condition in sorted(settings_by_condition.keys()):
 237             print '   if ({0}) {{'.format(condition)
 238             for setting in sorted(settings_by_condition[condition]):
 239                 print '      {0}'.format(setting)
 240             print '   }'
 241
 242
 243 def _parser():
 244     """Parse arguments and return namespace."""
 245     parser = argparse.ArgumentParser()
 246     parser.add_argument('-f',
 247                         dest='filename',
 248                         default='gl_and_es_API.xml',
 249                         help='an xml file describing an API')
 250     return parser.parse_args()
 251
 252
 253 def main():
 254     """Main function."""
 255     args = _parser()
 256     printer = PrintCode()
 257     api = gl_XML.parse_GL_API(args.filename)
 258     printer.Print(api)
 259
 260
 261 if __name__ == '__main__':
 262     main()