kc3-lang/angle/scripts/generate_loader.py

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• Author : jchen10
  Date : 2019-01-14 15:44:25
  Hash : 55f20f68
  Message : Fix generate_loader.py The message printed by the #error macro should be enclosed in marks for gcc. Bug: angleproject:2995 Change-Id: I5d8ebb28ef5e225eb88990642b6b58936cad4369 Reviewed-on: https://chromium-review.googlesource.com/c/1407542 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jie A Chen <jie.a.chen@intel.com>

• scripts/generate_loader.py

• #!/usr/bin/python2
  #
  # Copyright 2018 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_loader.py:
  #   Generates dynamic loaders for various binding interfaces.
  
  import sys, os, pprint, json
  from datetime import date
  import registry_xml
  
  # Handle inputs/outputs for run_code_generation.py's auto_script
  if len(sys.argv) == 2 and sys.argv[1] == 'inputs':
  
      inputs = [
          'egl.xml',
          'egl_angle_ext.xml',
          'registry_xml.py',
          'wgl.xml',
      ]
  
      print(",".join(inputs))
      sys.exit(0)
  
  def write_header(data_source_name, all_cmds, api, preamble, path, lib, ns = "", prefix = None, export = ""):
      file_name = "%s_loader_autogen.h" % api
      header_path = registry_xml.path_to(path, file_name)
      def pre(cmd):
          if prefix == None:
              return cmd
          return prefix + cmd[len(api):]
      with open(header_path, "w") as out:
          var_protos = ["%sextern PFN%sPROC %s%s;" % (export, cmd.upper(), ns, pre(cmd)) for cmd in all_cmds]
          loader_header = template_loader_h.format(
              script_name = os.path.basename(sys.argv[0]),
              data_source_name = data_source_name,
              year = date.today().year,
              function_pointers = "\n".join(var_protos),
              api_upper = api.upper(),
              api_lower = api,
              preamble = preamble,
              export = export,
              lib = lib.upper())
  
          out.write(loader_header)
          out.close()
  
  def write_source(data_source_name, all_cmds, api, path, ns = "", prefix = None, export = ""):
      file_name = "%s_loader_autogen.cpp" % api
      source_path = registry_xml.path_to(path, file_name)
      def pre(cmd):
          if prefix == None:
              return cmd
          return prefix + cmd[len(api):]
  
      with open(source_path, "w") as out:
          var_defs = ["%sPFN%sPROC %s%s;" % (export, cmd.upper(), ns, pre(cmd)) for cmd in all_cmds]
  
          setter = "    %s%s = reinterpret_cast<PFN%sPROC>(loadProc(\"%s\"));"
          setters = [setter % (ns, pre(cmd), cmd.upper(), pre(cmd)) for cmd in all_cmds]
  
          loader_source = template_loader_cpp.format(
              script_name = os.path.basename(sys.argv[0]),
              data_source_name = data_source_name,
              year = date.today().year,
              function_pointers = "\n".join(var_defs),
              set_pointers = "\n".join(setters),
              api_upper = api.upper(),
              api_lower = api)
  
          out.write(loader_source)
          out.close()
  
  def gen_libegl_loader():
  
      data_source_name = "egl.xml and egl_angle_ext.xml"
      xml = registry_xml.RegistryXML("egl.xml", "egl_angle_ext.xml")
  
      for major_version, minor_version in [[1, 0], [1, 1], [1, 2], [1, 3], [1, 4], [1, 5]]:
          annotation = "{}_{}".format(major_version, minor_version)
          name_prefix = "EGL_VERSION_"
  
          feature_name = "{}{}".format(name_prefix, annotation)
  
          xml.AddCommands(feature_name, annotation)
  
      xml.AddExtensionCommands(registry_xml.supported_egl_extensions, ['egl'])
  
      all_cmds = xml.all_cmd_names.get_all_commands()
  
      path = os.path.join("..", "src", "libEGL")
      write_header(data_source_name, all_cmds, "egl", libegl_preamble, path, "LIBEGL", "", "EGL_")
      write_source(data_source_name, all_cmds, "egl", path, "", "EGL_")
  
  def gen_gl_loader():
  
      data_source_name = "gl.xml and gl_angle_ext.xml"
      xml = registry_xml.RegistryXML("gl.xml", "gl_angle_ext.xml")
  
      # First run through the main GLES entry points.  Since ES2+ is the primary use
      # case, we go through those first and then add ES1-only APIs at the end.
      for major_version, minor_version in [[2, 0], [3, 0], [3, 1], [1, 0]]:
          annotation = "{}_{}".format(major_version, minor_version)
          name_prefix = "GL_ES_VERSION_"
  
          is_gles1 = major_version == 1
          if is_gles1:
              name_prefix = "GL_VERSION_ES_CM_"
  
          feature_name = "{}{}".format(name_prefix, annotation)
  
          xml.AddCommands(feature_name, annotation)
  
      xml.AddExtensionCommands(registry_xml.supported_extensions, ['gles2', 'gles1'])
  
      all_cmds = xml.all_cmd_names.get_all_commands()
  
      if registry_xml.support_EGL_ANGLE_explicit_context:
          all_cmds += [cmd + "ContextANGLE" for cmd in xml.all_cmd_names.get_all_commands()]
  
      path = os.path.join("..", "util")
      ex = "ANGLE_UTIL_EXPORT "
      write_header(data_source_name, all_cmds, "gles", util_gles_preamble, path, "UTIL", export=ex)
      write_source(data_source_name, all_cmds, "gles", path, export=ex)
  
  def gen_egl_loader():
  
      data_source_name = "egl.xml and egl_angle_ext.xml"
      xml = registry_xml.RegistryXML("egl.xml", "egl_angle_ext.xml")
  
      for major_version, minor_version in [[1, 0], [1, 1], [1, 2], [1, 3], [1, 4], [1, 5]]:
          annotation = "{}_{}".format(major_version, minor_version)
          name_prefix = "EGL_VERSION_"
  
          feature_name = "{}{}".format(name_prefix, annotation)
  
          xml.AddCommands(feature_name, annotation)
  
      xml.AddExtensionCommands(registry_xml.supported_egl_extensions, ['egl'])
  
      all_cmds = xml.all_cmd_names.get_all_commands()
  
      path = os.path.join("..", "util")
      ex = "ANGLE_UTIL_EXPORT "
      write_header(data_source_name, all_cmds, "egl", util_egl_preamble, path, "UTIL", export=ex)
      write_source(data_source_name, all_cmds, "egl", path, export=ex)
  
  def gen_wgl_loader():
  
      supported_wgl_extensions = [
          "WGL_ARB_create_context",
          "WGL_ARB_extensions_string",
          "WGL_EXT_swap_control",
      ]
  
      source = "wgl.xml"
      xml = registry_xml.RegistryXML(source)
  
      for major_version, minor_version in [[1, 0]]:
          annotation = "{}_{}".format(major_version, minor_version)
          name_prefix = "WGL_VERSION_"
  
          feature_name = "{}{}".format(name_prefix, annotation)
  
          xml.AddCommands(feature_name, annotation)
  
      xml.AddExtensionCommands(supported_wgl_extensions, ['wgl'])
  
      all_cmds = xml.all_cmd_names.get_all_commands()
  
      path = os.path.join("..", "util", "windows")
      write_header(source, all_cmds, "wgl", util_wgl_preamble, path, "UTIL_WINDOWS", "_")
      write_source(source, all_cmds, "wgl", path, "_")
  
  def main():
      gen_libegl_loader()
      gen_gl_loader()
      gen_egl_loader()
      gen_wgl_loader()
  
  
  libegl_preamble = """#include <EGL/egl.h>
  #include <EGL/eglext.h>
  """
  
  util_gles_preamble = """#if defined(GL_GLES_PROTOTYPES) && GL_GLES_PROTOTYPES
  #error "Don't define GL prototypes if you want to use a loader!"
  #endif  // defined(GL_GLES_PROTOTYPES)
  
  #include "angle_gl.h"
  #include "util/util_export.h"
  """
  
  util_egl_preamble = """#include "util/util_export.h"
  
  #include <EGL/egl.h>
  #include <EGL/eglext.h>
  """
  
  util_wgl_preamble = """
  #include <WGL/wgl.h>
  #include <GLES2/gl2.h>
  
  // We add an underscore before each function name to ensure common names like "ChoosePixelFormat"
  // and "SwapBuffers" don't conflict with our function pointers. We can't use a namespace because
  // some functions conflict with preprocessor definitions.
  """
  
  template_loader_h = """// 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.
  //
  // {api_lower}_loader_autogen.h:
  //   Simple {api_upper} function loader.
  
  #ifndef {lib}_{api_upper}_LOADER_AUTOGEN_H_
  #define {lib}_{api_upper}_LOADER_AUTOGEN_H_
  
  {preamble}
  {function_pointers}
  
  namespace angle
  {{
  using GenericProc = void (*)();
  using LoadProc = GenericProc (KHRONOS_APIENTRY *)(const char *);
  {export}void Load{api_upper}(LoadProc loadProc);
  }}  // namespace angle
      
  #endif  // {lib}_{api_upper}_LOADER_AUTOGEN_H_
  """
  
  template_loader_cpp = """// 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.
  //
  // {api_lower}_loader_autogen.cpp:
  //   Simple {api_upper} function loader.
  
  #include "{api_lower}_loader_autogen.h"
  
  {function_pointers}
  
  namespace angle
  {{
  void Load{api_upper}(LoadProc loadProc)
  {{
  {set_pointers}
  }}
  }}  // namespace angle
  """
  
  if __name__ == '__main__':
      sys.exit(main())