kc3-lang/angle/scripts/generate_entry_points.py

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• Hash : 2e16d96d
  Author :
  Date : 2017-04-19T14:06:36
  

  GLES2: Use codegen for the entry point header.
  
  This is a first step towards auto-generating more entry point files.
  
  BUG=angleproject:1309
  
  Change-Id: Ic75a627feb91c19b6bb398a6f9f1a37b603dea14
  Reviewed-on: https://chromium-review.googlesource.com/483425
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• scripts/generate_entry_points.py

• #!/usr/bin/python
  #
  # Copyright 2017 The ANGLE Project Authors. All rights reserved.
  # Use of this source code is governed by a BSD-style license that can be
  # found in the LICENSE file.
  #
  # generate_entry_points.py:
  #   Generates the OpenGL bindings and entry point layers for ANGLE.
  
  import sys, os, pprint
  import xml.etree.ElementTree as etree
  from datetime import date
  
  def script_relative(path):
      return os.path.join(os.path.dirname(sys.argv[0]), path)
  
  tree = etree.parse(script_relative('gl.xml'))
  root = tree.getroot()
  
  gles2_xpath = ".//feature[@name='GL_ES_VERSION_2_0']//command"
  gles2_commands = [cmd.attrib['name'] for cmd in root.findall(gles2_xpath)]
  
  template_entry_point_header = """// GENERATED FILE - DO NOT EDIT.
  // Generated by {script_name} using data from {data_source_name}.
  //
  // Copyright {year} The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  // entry_points_gles_{major_version}_{minor_version}_autogen.h:
  //   Defines the GLES {major_version}.{minor_version} entry points.
  
  #ifndef LIBGLESV2_ENTRYPOINTSGLES{major_version}{minor_version}_AUTOGEN_H_
  #define LIBGLESV2_ENTRYPOINTSGLES{major_version}{minor_version}_AUTOGEN_H_
  
  #include <GLES2/gl{major_version}.h>
  #include <export.h>
  
  namespace gl
  {{
  {entry_points}
  }}  // namespace gl
  
  #endif  // LIBGLESV2_ENTRYPOINTSGLES{major_version}{minor_version}_AUTOGEN_H_
  """
  
  template_entry_point_decl = """ANGLE_EXPORT {return_type}GL_APIENTRY {name}({params});"""
  
  commands = root.find(".//commands[@namespace='GL']")
  entry_point_decls_gles_2_0 = []
  
  def format_entry_point_decl(cmd_name, proto, params):
      return template_entry_point_decl.format(
          name = cmd_name[2:],
          return_type = proto[:-len(cmd_name)],
          params = ", ".join(params))
  
  for cmd_name in gles2_commands:
      command_xpath = "command/proto[name='" + cmd_name + "']/.."
      command = commands.find(command_xpath)
      params = ["".join(param.itertext()) for param in command.findall("./param")]
      proto = "".join(command.find("./proto").itertext())
      entry_point_decls_gles_2_0 += [format_entry_point_decl(cmd_name, proto, params)]
  
  gles_2_0_header = template_entry_point_header.format(
      script_name = os.path.basename(sys.argv[0]),
      data_source_name = "gl.xml",
      year = date.today().year,
      major_version = 2,
      minor_version = 0,
      entry_points = "\n".join(entry_point_decls_gles_2_0))
  
  def path_to(folder, file):
      return os.path.join(script_relative(".."), "src", folder, file)
  
  gles_2_0_header_path = path_to("libGLESv2", "entry_points_gles_2_0_autogen.h")
  
  with open(gles_2_0_header_path, "w") as out:
      out.write(gles_2_0_header)
      out.close()
  

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