kc3-lang/angle/src/libANGLE/gen_format_map.py

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• Author : Corentin Wallez
  Date : 2017-09-18 17:05:22
  Hash : 2e568cfb
  Message : Add generator for packed GL enums. For testing this also converts two unimportant GLenums, gl::BufferUsage and gl::CullModeFace. BUG=angleproject:2169 Change-Id: If1e86a97d0fed3fd567303aca6506ec579503076 Reviewed-on: https://chromium-review.googlesource.com/688000 Commit-Queue: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>

• src/libANGLE/gen_format_map.py

• #!/usr/bin/python
  # Copyright 2016 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.
  #
  # gen_format_map.py:
  #  Code generation for GL format map. The format map matches between
  #  {format,type} and internal format.
  
  from datetime import date
  import sys
  
  sys.path.append('renderer')
  import angle_format
  
  template_cpp = """// GENERATED FILE - DO NOT EDIT.
  // Generated by {script_name} using data from {data_source_name}.
  // ES3 format info from {es3_data_source_name}.
  //
  // Copyright {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.
  //
  // format_map:
  //   Determining the sized internal format from a (format,type) pair.
  //   Also check es3 format combinations for validity.
  
  #include "angle_gl.h"
  #include "common/debug.h"
  
  namespace gl
  {{
  
  GLenum GetSizedFormatInternal(GLenum format, GLenum type)
  {{
      switch (format)
      {{
  {format_cases}        case GL_NONE:
              return GL_NONE;
  
          default:
              break;
      }}
  
      return GL_NONE;
  }}
  
  bool ValidES3Format(GLenum format)
  {{
      switch (format)
      {{
  {es3_format_cases}            return true;
  
          default:
              return false;
      }}
  }}
  
  bool ValidES3Type(GLenum type)
  {{
      switch (type)
      {{
  {es3_type_cases}            return true;
  
          default:
              return false;
      }}
  }}
  
  bool ValidES3FormatCombination(GLenum format, GLenum type, GLenum internalFormat)
  {{
      ASSERT(ValidES3Format(format) && ValidES3Type(type));
  
      switch (format)
      {{
  {es3_combo_cases}        default:
              UNREACHABLE();
              break;
      }}
  
      return false;
  }}
  
  }}  // namespace gl
  """
  
  template_format_case = """        case {format}:
              switch (type)
              {{
  {type_cases}                default:
                      break;
              }}
              break;
  
  """
  
  template_simple_case = """                case {key}:
                      return {result};
  """
  
  template_es3_combo_type_case = """                case {type}:
                  {{
                      switch (internalFormat)
                      {{
  {internal_format_cases}                            return true;
                          default:
                              break;
                      }}
                      break;
                  }}
  """
  
  def parse_type_case(type, result):
      return template_simple_case.format(
          key = type, result = result)
  
  def parse_format_case(format, type_map):
      type_cases = ""
      for type, internal_format in sorted(type_map.iteritems()):
          type_cases += parse_type_case(type, internal_format)
      return template_format_case.format(
          format = format, type_cases = type_cases)
  
  input_script = 'format_map_data.json'
  
  format_map = angle_format.load_json(input_script)
  
  format_cases = ""
  
  for format, type_map in sorted(format_map.iteritems()):
      format_cases += parse_format_case(format, type_map)
  
  combo_data_file = 'es3_format_type_combinations.json'
  es3_combo_data = angle_format.load_json(combo_data_file)
  combo_data = [combo for sublist in es3_combo_data.values() for combo in sublist]
  
  types = set()
  formats = set()
  combos = {}
  
  for internal_format, format, type in combo_data:
      types.update([type])
      formats.update([format])
      if format not in combos:
          combos[format] = {}
      if type not in combos[format]:
          combos[format][type] = [internal_format]
      else:
          combos[format][type] += [internal_format]
  
  es3_format_cases = ""
  
  for format in sorted(formats):
      es3_format_cases += "        case " + format + ":\n"
  
  es3_type_cases = ""
  
  for type in sorted(types):
      es3_type_cases += "        case " + type + ":\n"
  
  es3_combo_cases = ""
  
  for format, type_combos in combos.iteritems():
      this_type_cases = ""
      for type, combos in type_combos.iteritems():
          internal_format_cases = ""
          for internal_format in combos:
              internal_format_cases += "                        case " + internal_format + ":\n"
  
          this_type_cases += template_es3_combo_type_case.format(
              type = type, internal_format_cases = internal_format_cases)
  
      es3_combo_cases += template_format_case.format(
          format = format, type_cases = this_type_cases)
  
  with open('format_map_autogen.cpp', 'wt') as out_file:
      output_cpp = template_cpp.format(
          script_name = sys.argv[0],
          data_source_name = input_script,
          es3_data_source_name = combo_data_file,
          copyright_year = date.today().year,
          format_cases = format_cases,
          es3_format_cases = es3_format_cases,
          es3_type_cases = es3_type_cases,
          es3_combo_cases = es3_combo_cases)
      out_file.write(output_cpp)