Win: only use transport surface if EGL_ANGLE_d3d_share_handle_client_buffer is advertised.

ui/gfx/gl/generate_bindings.py

 #!/usr/bin/env python
 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """code generator for GL/GLES extension wrangler."""
 
 import os
 import collections
 import re
@@ skipping 984 matching lines @@
   'arguments': 'Display* dpy, XVisualInfo* visualInfo', },
 { 'return_type': 'GLXContext',
   'names': ['glXCreateContextAttribsARB'],
   'arguments':
       'Display* dpy, GLXFBConfig config, GLXContext share_context, int direct, '
       'const int* attrib_list', },
 ]
 
 FUNCTION_SETS = [
   [GL_FUNCTIONS, 'gl', ['../../../third_party/mesa/MesaLib/include/GL/glext.h',
-    '../../../third_party/khronos/GLES2/gl2ext.h']],
-  [OSMESA_FUNCTIONS, 'osmesa', []],
-  [EGL_FUNCTIONS, 'egl', ['../../../third_party/khronos/EGL/eglext.h']],
+    '../../../third_party/khronos/GLES2/gl2ext.h'], []],
+  [OSMESA_FUNCTIONS, 'osmesa', [], []],
+  [EGL_FUNCTIONS, 'egl', ['../../../third_party/khronos/EGL/eglext.h'],
+    [
+      'EGL_ANGLE_d3d_share_handle_client_buffer',
+    ],
+  ],
   [WGL_FUNCTIONS, 'wgl', [
-    '../../../third_party/mesa/MesaLib/include/GL/wglext.h']],
+    '../../../third_party/mesa/MesaLib/include/GL/wglext.h'], []],
   [GLX_FUNCTIONS, 'glx', [
-    '../../../third_party/mesa/MesaLib/include/GL/glxext.h']],
+    '../../../third_party/mesa/MesaLib/include/GL/glxext.h'], []],
 ]
 
-
 def GenerateHeader(file, functions, set_name, used_extension_functions):
   """Generates gl_binding_autogen_x.h"""
 
   # Write file header.
   file.write('// Copyright (c) 2011 The Chromium Authors. All rights reserved.\n')
   file.write('// Use of this source code is governed by a BSD-style license that can be\n')
   file.write('// found in the LICENSE file.\n')
   file.write('\n')
   file.write('// This file is automatically generated.\n')
   file.write('\n')
@@ skipping 346 matching lines @@
   return function_to_extension
 
 
 def LooksLikeExtensionFunction(function):
   """Heuristic to see if a function name is consistent with extension function
   naming."""
   vendor = re.match(r'\w+?([A-Z][A-Z]+)$', function)
   return vendor is not None and not vendor.group(1) in ['GL', 'API', 'DC']
 
 
-def GetUsedExtensionFunctions(functions, extension_headers):
+def GetUsedExtensionFunctions(functions, extension_headers, extra_extensions):
   """Determine which functions belong to extensions.
 
   Args:
     functions: List of (return type, function names, arguments).
     extension_headers: List of header file names.
   Returns:
     List of (extension name, [function name alternatives]) sorted with least
     preferred extensions first.
   """
   # Parse known extensions.
   extensions = GetExtensionFunctions(extension_headers)
   functions_to_extensions = GetFunctionToExtensionMap(extensions)
 
   # Collect all used extension functions.
   used_extension_functions = collections.defaultdict(lambda: [])
   for func in functions:
     for name in func['names']:
       # Make sure we know about all extension functions.
       if (LooksLikeExtensionFunction(name) and
           not name in functions_to_extensions):
         raise RuntimeError('%s looks like an extension function but does not '
             'belong to any of the known extensions.' % name)
       if name in functions_to_extensions:
         extension = functions_to_extensions[name]
         used_extension_functions[extension].append((func['names'][0], name))
 
+  # Add extensions that do not have any functions.
+  used_extension_functions.update(dict(
+      [(e, []) for e in extra_extensions if e not in used_extension_functions]))
+
   def ExtensionSortKey(name):
     # Prefer ratified extensions and EXTs.
     preferences = ['_ARB_', '_OES_', '_EXT_', '']
     for i, category in enumerate(preferences):
       if category in name:
         return -i
   used_extension_functions = sorted(used_extension_functions.items(),
       key = lambda item: ExtensionSortKey(item[0]))
   return used_extension_functions
 
 
 def main(argv):
   """This is the main function."""
 
   if len(argv) >= 1:
     dir = argv[0]
   else:
     dir = '.'
 
-  for [functions, set_name, extension_headers] in FUNCTION_SETS:
+  for [functions, set_name, extension_headers, extensions] in FUNCTION_SETS:
     used_extension_functions = GetUsedExtensionFunctions(
-        functions, extension_headers)
+        functions, extension_headers, extensions)
 
     header_file = open(
         os.path.join(dir, 'gl_bindings_autogen_%s.h' % set_name), 'wb')
     GenerateHeader(header_file, functions, set_name, used_extension_functions)
     header_file.close()
 
     source_file = open(
         os.path.join(dir, 'gl_bindings_autogen_%s.cc' % set_name), 'wb')
     GenerateSource(source_file, functions, set_name, used_extension_functions)
     source_file.close()
 
   source_file = open(os.path.join(dir, 'gl_bindings_autogen_mock.cc'), 'wb')
   GenerateMockSource(source_file, GL_FUNCTIONS)
   source_file.close()
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))