GL_EXT_spirv_intrinsics - Port extensions

Add mechanism to use GL_EXT_spirv_intrinsics headers in glslang.
Ported GL_EXT_shader_realtime_clock as an example.

1 files changed, 98 insertions, 0 deletions

diff --git a/gen_extension_headers.py b/gen_extension_headers.py
new file mode 100644
index 00000000..a787f9a9
--- /dev/null
+++ b/gen_extension_headers.py
@@ -0,0 +1,98 @@
+#!/usr/bin/env python
+
+# Copyright (c) 2020 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.

+

+import glob

+import sys

+import os

+

+def generate_main(glsl_files, output_header_file):

+    # Write commit ID to output header file

+    with open(output_header_file, "w") as header_file:

+        # Copyright Notice

+        header_string =  '/***************************************************************************\n'

+        header_string += ' *\n'

+        header_string += ' * Copyright (c) 2015-2021 The Khronos Group Inc.\n'

+        header_string += ' * Copyright (c) 2015-2021 Valve Corporation\n'

+        header_string += ' * Copyright (c) 2015-2021 LunarG, Inc.\n'

+        header_string += ' * Copyright (c) 2015-2021 Google Inc.\n'

+        header_string += ' * Copyright (c) 2021 Advanced Micro Devices, Inc.All rights reserved.\n'

+        header_string += ' *\n'

+        header_string += ' ****************************************************************************/\n'

+        header_string += '#pragma once\n\n'

+        header_string += '#ifndef _INTRINSIC_EXTENSION_HEADER_H_\n'

+        header_string += '#define _INTRINSIC_EXTENSION_HEADER_H_\n\n'

+        header_file.write(header_string)

+

+        symbol_name_list = []

+

+        for i in glsl_files:

+            glsl_contents = open(i,"r").read()

+

+            filename = os.path.basename(i)

+            symbol_name = filename.split(".")[0]

+            symbol_name_list.append(symbol_name)

+            header_name = symbol_name + ".h"

+            header_str = 'std::string %s_GLSL = R"(\n%s\n)";\n' % (symbol_name, glsl_contents)

+            header_str += '\n'

+            header_file.write(header_str)

+

+        contents = ''

+        contents += '\n'
+        contents += 'std::string getIntrinsic(const char* const* shaders, int n) {\n'
+        contents += '\tstd::string shaderString = "";\n';
+
+        contents += '\tfor (int i = 0; i < n; i++) {\n'
+
+        for symbol_name in symbol_name_list:

+            contents += '\t\tif (strstr(shaders[i], "%s") != NULL) {\n'   % (symbol_name)
+            contents += '\t\t    shaderString.append(%s_GLSL);\n' % (symbol_name)
+            contents += '\t\t}\n'

+
+        contents += '\t}\n'
+        contents += '\treturn shaderString;\n';
+        contents += '}\n'

+

+        contents += '\n#endif\n'

+        header_file.write(contents)

+

+def main():

+    if len(sys.argv) < 2:
+        raise Exception("Invalid number of arguments")

+

+    i = 0

+    while i < len(sys.argv):
+        opt = sys.argv[i]
+        i = i + 1
+
+        if opt == "-i" or opt == "-o":
+            if i == len(sys.argv):
+                raise Exception("Expected path after {}".format(opt))
+            val = sys.argv[i]
+            i = i + 1
+            if (opt == "-i"):
+                input_dir = val
+            elif (opt == "-o"):
+                output_file = val
+            else:
+                raise Exception("Unknown flag {}".format(opt))

+

+    glsl_files = glob.glob(input_dir + '/*.glsl')

+

+    # Generate main header

+    generate_main(glsl_files, output_file)

+

+if __name__ == '__main__':

+    main()
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