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# Copyright © 2022 Intel Corporation
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice (including the next
# paragraph) shall be included in all copies or substantial portions of the
# Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
# Converts GLSL shader to SPIR-V library
import argparse
import subprocess
import sys
import os
import typing as T
if T.TYPE_CHECKING:
class Arguments(T.Protocol):
input: str
output: str
glslang: str
create_entry: T.Optional[str]
glsl_ver: T.Optional[str]
Olib: bool
extra: T.Optional[str]
vn: str
stage: str
def get_args() -> 'Arguments':
parser = argparse.ArgumentParser()
parser.add_argument('input', help="Name of input file.")
parser.add_argument('output', help="Name of output file.")
parser.add_argument('glslang', help="path to glslangValidator")
parser.add_argument("--create-entry",
dest="create_entry",
help="Create a new entry point and put to the end of a file.")
parser.add_argument('--glsl-version',
dest="glsl_ver",
choices=['100', '110', '120', '130', '140', '150', '300es', '310es', '330', '400', '410', '420', '430', '440', '450', '460'],
help="Override GLSL #version declaration in source.")
parser.add_argument("-Olib",
action='store_true',
help="Any optimizations are disabled and unused functions are saved.")
parser.add_argument("--extra-flags",
dest="extra",
help="Pass additional flags to glslangValidator.")
parser.add_argument("--vn",
dest="vn",
required=True,
help="Variable name. Creates a C header file that contains a uint32_t array.")
parser.add_argument("--stage",
default="vert",
choices=['vert', 'tesc', 'tese', 'geom', 'frag', 'comp'],
help="Uses specified stage rather than parsing the file extension")
parser.add_argument("-I",
dest="includes",
default=[],
action='append',
help="Include directory")
args = parser.parse_args()
return args
def create_include_guard(lines: T.List[str], filename: str) -> T.List[str]:
filename = filename.replace('.', '_')
upper_name = filename.upper()
guard_head = [f"#ifndef {upper_name}\n",
f"#define {upper_name}\n"]
guard_tail = [f"\n#endif // {upper_name}\n"]
# remove '#pragma once'
for idx, l in enumerate(lines):
if '#pragma once' in l:
lines.pop(idx)
break
return guard_head + lines + guard_tail
def convert_to_static_variable(lines: T.List[str], varname: str) -> T.List[str]:
for idx, l in enumerate(lines):
if varname in l:
lines[idx] = f"static {l}"
return lines
raise RuntimeError(f'Did not find {varname}, this is unexpected')
def override_version(lines: T.List[str], glsl_version: str) -> T.List[str]:
for idx, l in enumerate(lines):
if '#version ' in l:
lines[idx] = f"#version {glsl_version}\n"
return lines
raise RuntimeError('Did not find #version directive, this is unexpected')
def postprocess_file(args: 'Arguments') -> None:
with open(args.output, "r") as r:
lines = r.readlines()
# glslangValidator creates a variable without the static modifier.
lines = convert_to_static_variable(lines, args.vn)
# '#pragma once' is unstandardised.
lines = create_include_guard(lines, os.path.basename(r.name))
with open(args.output, "w") as w:
w.writelines(lines)
def preprocess_file(args: 'Arguments', origin_file: T.TextIO, directory: os.PathLike) -> str:
with open(os.path.join(directory, os.path.basename(origin_file.name)), "w") as copy_file:
lines = origin_file.readlines()
if args.create_entry is not None:
lines.append(f"\nvoid {args.create_entry}() {{}}\n")
if args.glsl_ver is not None:
override_version(lines, args.glsl_ver)
copy_file.writelines(lines)
return copy_file.name
def process_file(args: 'Arguments') -> None:
with open(args.input, "r") as infile:
copy_file = preprocess_file(args, infile,
os.path.dirname(args.output))
cmd_list = [args.glslang]
if args.Olib:
cmd_list.append("--keep-uncalled")
if args.vn is not None:
cmd_list.extend(["--variable-name", args.vn])
if args.extra is not None:
cmd_list.append(args.extra)
if args.create_entry is not None:
cmd_list.extend(["--entry-point", args.create_entry])
for f in args.includes:
cmd_list.append('-I' + f)
cmd_list.extend([
'-V',
'-o', args.output,
'-S', args.stage,
copy_file,
])
ret = subprocess.run(cmd_list, stdout=subprocess.PIPE, stderr=subprocess.PIPE, timeout=30)
if ret.returncode != 0:
print(ret.stdout)
print(ret.stderr, file=sys.stderr)
sys.exit(1)
if args.vn is not None:
postprocess_file(args)
if args.create_entry is not None:
os.remove(copy_file)
def main() -> None:
args = get_args()
process_file(args)
if __name__ == "__main__":
main()
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