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

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• Hash : ed4d342e
  Author :
  Date : 2016-10-03T15:45:35
  

  Make the "FormatMap" a static switch.
  
  This map lives in formatutils.cpp, and maps from a {format,type} to
  an internal format. Convert this into generated code.
  
  BUG=angleproject:1389
  
  Change-Id: Ib12750d83d3f8cf8794d6668874cb025f856b5d4
  Reviewed-on: https://chromium-review.googlesource.com/392207
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  

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• 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}.
  //
  // 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.
  
  #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;
      }}
  
      UNREACHABLE();
      return GL_NONE;
  }}
  
  }}  // namespace gl
  """
  
  template_format_case = """        case {format}:
              switch (type)
              {{
  {type_cases}                default:
                      break;
              }}
              break;
  
  """
  
  template_type_case = """                case {type}:
                      return {internal_format};
  """
  
  def parse_type_case(type, internal_format):
      return template_type_case.format(
          type = type, internal_format = internal_format)
  
  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)
  
  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,
          copyright_year = date.today().year,
          format_cases = format_cases)
      out_file.write(output_cpp)
      out_file.close()
  

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