gen_extension_headers.py

   1 #!/usr/bin/env python3
   2
   3 # Copyright (c) 2020 Google Inc.
   4 #
   5 # Licensed under the Apache License, Version 2.0 (the "License");
   6 # you may not use this file except in compliance with the License.
   7 # You may obtain a copy of the License at
   8 #
   9 #     http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 # Unless required by applicable law or agreed to in writing, software
  12 # distributed under the License is distributed on an "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 # See the License for the specific language governing permissions and
  15 # limitations under the License.
  16
  17 import glob
  18 import sys
  19 import os
  20
  21 def generate_main(glsl_files, output_header_file):
  22     # Write commit ID to output header file
  23     with open(output_header_file, "w") as header_file:
  24         # Copyright Notice
  25         header_string =  '/***************************************************************************\n'
  26         header_string += ' *\n'
  27         header_string += ' * Copyright (c) 2015-2021 The Khronos Group Inc.\n'
  28         header_string += ' * Copyright (c) 2015-2021 Valve Corporation\n'
  29         header_string += ' * Copyright (c) 2015-2021 LunarG, Inc.\n'
  30         header_string += ' * Copyright (c) 2015-2021 Google Inc.\n'
  31         header_string += ' * Copyright (c) 2021 Advanced Micro Devices, Inc.All rights reserved.\n'
  32         header_string += ' *\n'
  33         header_string += ' ****************************************************************************/\n'
  34         header_string += '#pragma once\n\n'
  35         header_string += '#ifndef _INTRINSIC_EXTENSION_HEADER_H_\n'
  36         header_string += '#define _INTRINSIC_EXTENSION_HEADER_H_\n\n'
  37         header_file.write(header_string)
  38
  39         symbol_name_list = []
  40
  41         for i in glsl_files:
  42             glsl_contents = open(i,"r").read()
  43
  44             filename = os.path.basename(i)
  45             symbol_name = filename.split(".")[0]
  46             symbol_name_list.append(symbol_name)
  47             header_name = symbol_name + ".h"
  48             header_str = 'std::string %s_GLSL = R"(\n%s\n)";\n' % (symbol_name, glsl_contents)
  49             header_str += '\n'
  50             header_file.write(header_str)
  51
  52         contents = ''
  53         contents += '\n'
  54         contents += 'std::string getIntrinsic(const char* const* shaders, int n) {\n'
  55         contents += '\tstd::string shaderString = "";\n';
  56
  57         contents += '\tfor (int i = 0; i < n; i++) {\n'
  58
  59         for symbol_name in symbol_name_list:
  60             contents += '\t\tif (strstr(shaders[i], "%s") != nullptr) {\n'   % (symbol_name)
  61             contents += '\t\t    shaderString.append(%s_GLSL);\n' % (symbol_name)
  62             contents += '\t\t}\n'
  63
  64         contents += '\t}\n'
  65         contents += '\treturn shaderString;\n';
  66         contents += '}\n'
  67
  68         contents += '\n#endif\n'
  69         header_file.write(contents)
  70
  71 def main():
  72     if len(sys.argv) < 2:
  73         raise Exception("Invalid number of arguments")
  74
  75     i = 0
  76     while i < len(sys.argv):
  77         opt = sys.argv[i]
  78         i = i + 1
  79
  80         if opt == "-i" or opt == "-o":
  81             if i == len(sys.argv):
  82                 raise Exception("Expected path after {}".format(opt))
  83             val = sys.argv[i]
  84             i = i + 1
  85             if (opt == "-i"):
  86                 input_dir = val
  87             elif (opt == "-o"):
  88                 output_file = val
  89             else:
  90                 raise Exception("Unknown flag {}".format(opt))
  91
  92     glsl_files = glob.glob(input_dir + '/*.glsl')
  93
  94     # Generate main header
  95     generate_main(glsl_files, output_file)
  96
  97 if __name__ == '__main__':
  98     main()