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/objectpurge.h"
  92 #include "main/performance_monitor.h"
  93 #include "main/pipelineobj.h"
  94 #include "main/pixel.h"
  95 #include "main/pixelstore.h"
  96 #include "main/points.h"
  97 #include "main/polygon.h"
  98 #include "main/program_resource.h"
  99 #include "main/querymatrix.h"
 100 #include "main/queryobj.h"
 101 #include "main/readpix.h"
 102 #include "main/samplerobj.h"
 103 #include "main/scissor.h"
 104 #include "main/stencil.h"
 105 #include "main/texenv.h"
 106 #include "main/texgetimage.h"
 107 #include "main/teximage.h"
 108 #include "main/texgen.h"
 109 #include "main/texobj.h"
 110 #include "main/texparam.h"
 111 #include "main/texstate.h"
 112 #include "main/texstorage.h"
 113 #include "main/texturebarrier.h"
 114 #include "main/textureview.h"
 115 #include "main/transformfeedback.h"
 116 #include "main/mtypes.h"
 117 #include "main/varray.h"
 118 #include "main/viewport.h"
 119 #include "main/shaderapi.h"
 120 #include "main/shaderimage.h"
 121 #include "main/uniforms.h"
 122 #include "main/syncobj.h"
 123 #include "main/formatquery.h"
 124 #include "main/dispatch.h"
 125 #include "main/vdpau.h"
 126 #include "vbo/vbo.h"
 127
 128
 129 /**
 130  * Initialize a context's exec table with pointers to Mesa's supported
 131  * GL functions.
 132  *
 133  * This function depends on ctx->Version.
 134  *
 135  * \param ctx  GL context to which \c exec belongs.
 136  */
 137 void
 138 _mesa_initialize_exec_table(struct gl_context *ctx)
 139 {
 140    struct _glapi_table *exec;
 141
 142    exec = ctx->Exec;
 143    assert(exec != NULL);
 144
 145    assert(ctx->Version > 0);
 146
 147    vbo_initialize_exec_dispatch(ctx, exec);
 148 """
 149
 150
 151 footer = """
 152 }
 153 """
 154
 155
 156 class PrintCode(gl_XML.gl_print_base):
 157
 158     def __init__(self):
 159         gl_XML.gl_print_base.__init__(self)
 160
 161         self.name = 'gl_genexec.py'
 162         self.license = license.bsd_license_template % (
 163             'Copyright (C) 2012 Intel Corporation',
 164             'Intel Corporation')
 165
 166     def printRealHeader(self):
 167         print header
 168
 169     def printRealFooter(self):
 170         print footer
 171
 172     def printBody(self, api):
 173         # Collect SET_* calls by the condition under which they should
 174         # be called.
 175         settings_by_condition = collections.defaultdict(lambda: [])
 176         for f in api.functionIterateAll():
 177             if f.exec_flavor not in exec_flavor_map:
 178                 raise Exception(
 179                     'Unrecognized exec flavor {0!r}'.format(f.exec_flavor))
 180             condition_parts = []
 181             if f.name in apiexec.functions:
 182                 ex = apiexec.functions[f.name]
 183                 unconditional_count = 0
 184
 185                 if ex.compatibility is not None:
 186                     condition_parts.append('ctx->API == API_OPENGL_COMPAT')
 187                     unconditional_count += 1
 188
 189                 if ex.core is not None:
 190                     condition_parts.append('ctx->API == API_OPENGL_CORE')
 191                     unconditional_count += 1
 192
 193                 if ex.es1 is not None:
 194                     condition_parts.append('ctx->API == API_OPENGLES')
 195                     unconditional_count += 1
 196
 197                 if ex.es2 is not None:
 198                     if ex.es2 > 20:
 199                         condition_parts.append('(ctx->API == API_OPENGLES2 && ctx->Version >= {0})'.format(ex.es2))
 200                     else:
 201                         condition_parts.append('ctx->API == API_OPENGLES2')
 202                         unconditional_count += 1
 203
 204                 # If the function is unconditionally available in all four
 205                 # APIs, then it is always available.  Replace the complex
 206                 # tautology condition with "true" and let GCC do the right
 207                 # thing.
 208                 if unconditional_count == 4:
 209                     condition_parts = ['true']
 210             else:
 211                 if f.desktop:
 212                     if f.deprecated:
 213                         condition_parts.append('ctx->API == API_OPENGL_COMPAT')
 214                     else:
 215                         condition_parts.append('_mesa_is_desktop_gl(ctx)')
 216                 if 'es1' in f.api_map:
 217                     condition_parts.append('ctx->API == API_OPENGLES')
 218                 if 'es2' in f.api_map:
 219                     if f.api_map['es2'] > 2.0:
 220                         condition_parts.append('(ctx->API == API_OPENGLES2 && ctx->Version >= {0})'.format(int(f.api_map['es2'] * 10)))
 221                     else:
 222                         condition_parts.append('ctx->API == API_OPENGLES2')
 223
 224             if not condition_parts:
 225                 # This function does not exist in any API.
 226                 continue
 227             condition = ' || '.join(condition_parts)
 228             prefix = exec_flavor_map[f.exec_flavor]
 229             if prefix is None:
 230                 # This function is not implemented, or is dispatched
 231                 # dynamically.
 232                 continue
 233             settings_by_condition[condition].append(
 234                 'SET_{0}(exec, {1}{0});'.format(f.name, prefix, f.name))
 235         # Print out an if statement for each unique condition, with
 236         # the SET_* calls nested inside it.
 237         for condition in sorted(settings_by_condition.keys()):
 238             print '   if ({0}) {{'.format(condition)
 239             for setting in sorted(settings_by_condition[condition]):
 240                 print '      {0}'.format(setting)
 241             print '   }'
 242
 243
 244 def _parser():
 245     """Parse arguments and return namespace."""
 246     parser = argparse.ArgumentParser()
 247     parser.add_argument('-f',
 248                         dest='filename',
 249                         default='gl_and_es_API.xml',
 250                         help='an xml file describing an API')
 251     return parser.parse_args()
 252
 253
 254 def main():
 255     """Main function."""
 256     args = _parser()
 257     printer = PrintCode()
 258     api = gl_XML.parse_GL_API(args.filename)
 259     printer.Print(api)
 260
 261
 262 if __name__ == '__main__':
 263     main()