Introduce GLStubApi

ui/gl/generate_bindings.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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 optparse
 import os
 import collections
@@ skipping 1851 matching lines @@
   'GLES2/gl2.h',
   'GLES2/gl2ext.h',
   'GLES2/gl2chromium.h',
   'GLES2/gl2extchromium.h',
   'GLES3/gl3.h',
 ]
 
 SELF_LOCATION = os.path.dirname(os.path.abspath(__file__))
 
 LICENSE_AND_HEADER = """\
-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2016 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.
 //
 // This file is auto-generated from
 // ui/gl/generate_bindings.py
 // It's formatted by clang-format using chromium coding style:
 //    clang-format -i -style=chromium filename
 // DO NOT EDIT!
 
 """
@@ skipping 147 matching lines @@
     if arg_count <= 10:
       file.write('  MOCK_METHOD%d(%s, %s(%s));\n' %
           (arg_count, func['known_as'][2:], func['return_type'], args))
     else:
       file.write('  // TODO(zmo): crbug.com/456340\n')
       file.write('  // %s cannot be mocked because it has %d args.\n' %
           (func['known_as'], arg_count))
 
   file.write('\n')
 
+def GenerateStubHeader(file, functions):
+  """Generates gl_stub_autogen_gl.h"""
+
+  # Write file header.
+  file.write(LICENSE_AND_HEADER)
+
+  # Write API declaration.
+  for func in functions:
+    args = func['arguments']
+    if args == 'void':
+      args = ''
+    return_type = func['return_type'];
+    file.write('  %s gl%sFn(%s) override' % (return_type, func['known_as'][2:],
+                                             args))
+    if return_type == 'void':
+      file.write(' {}\n');
+    else:
+      file.write(';\n');
+
+  file.write('\n')
+
+def GenerateStubSource(file, functions):
+  """Generates gl_stub_autogen_gl.cc"""
+
+  # Write file header.
+  file.write(LICENSE_AND_HEADER)
+  file.write('\n#include "ui/gl/gl_stub_api_base.h"\n\n')
+  file.write('namespace gl {\n\n')
+
+  # Write API declaration.
+  for func in functions:
+    return_type = func['return_type'];
+    if return_type == 'void':
+      continue
+    args = func['arguments']
+    if args == 'void':
+      args = ''
+    file.write('%s GLStubApiBase::gl%sFn(%s) {\n' % (return_type,
+                                                     func['known_as'][2:],
+                                                     args))
+    file.write('  return 0;\n');
+    file.write('}\n\n');
+
+  file.write('\n}  // namespace gl\n')
+
 
 def GenerateSource(file, functions, set_name, used_extensions,
                    used_client_extensions, options):
   """Generates gl_bindings_autogen_x.cc"""
 
   set_header_name = "ui/gl/gl_" + set_name.lower() + "_api_implementation.h"
   include_list = [ 'base/trace_event/trace_event.h',
                    'ui/gl/gl_enums.h',
                    'ui/gl/gl_bindings.h',
                    'ui/gl/gl_context.h',
@@ skipping 821 matching lines @@
     ClangFormat(source_file.name)
 
     enum_header_filenames = [ResolveHeader(h, HEADER_PATHS)
                              for h in GLES2_HEADERS_WITH_ENUMS]
     header_file = open(os.path.join(directory,
                                     'gl_enums_implementation_autogen.h'),
                        'wb')
     GenerateEnumUtils(header_file, enum_header_filenames)
     header_file.close()
     ClangFormat(header_file.name)
+
+    header_file = open(
+        os.path.join(directory, 'gl_stub_autogen_gl.h'), 'wb')
+    GenerateStubHeader(header_file, GL_FUNCTIONS)
+    header_file.close()
+    ClangFormat(header_file.name)
+
+    header_file = open(
+        os.path.join(directory, 'gl_stub_autogen_gl.cc'), 'wb')
+    GenerateStubSource(header_file, GL_FUNCTIONS)
+    header_file.close()
+    ClangFormat(header_file.name)
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))