94 lines
2.5 KiB
Python
Executable file
94 lines
2.5 KiB
Python
Executable file
#!/usr/bin/env python3
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#
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# Copyright (C) 2016 Google, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Compile GLSL to SPIR-V.
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Depends on glslangValidator.
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"""
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import os
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import sys
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import subprocess
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import struct
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import re
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SPIRV_MAGIC = 0x07230203
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COLUMNS = 4
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INDENT = 4
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in_filename = sys.argv[1]
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out_filename = sys.argv[2] if len(sys.argv) > 2 else None
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validator = sys.argv[3] if len(sys.argv) > 3 else \
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"../../../glslang/build/install/bin/glslangValidator"
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def identifierize(s):
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# translate invalid chars
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s = re.sub("[^0-9a-zA-Z_]", "_", s)
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# translate leading digits
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return re.sub("^[^a-zA-Z_]+", "_", s)
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def compile_glsl(filename, tmpfile):
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# invoke glslangValidator
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try:
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args = [validator, "-V", "-H", "-o", tmpfile, filename]
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output = subprocess.check_output(args, universal_newlines=True)
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except subprocess.CalledProcessError as e:
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print(e.output, file=sys.stderr)
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exit(1)
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# read the temp file into a list of SPIR-V words
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words = []
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with open(tmpfile, "rb") as f:
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data = f.read()
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assert(len(data) and len(data) % 4 == 0)
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# determine endianness
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fmt = ("<" if data[0] == (SPIRV_MAGIC & 0xff) else ">") + "I"
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for i in range(0, len(data), 4):
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words.append(struct.unpack(fmt, data[i:(i + 4)])[0])
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assert(words[0] == SPIRV_MAGIC)
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# remove temp file
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os.remove(tmpfile)
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return (words, output.rstrip())
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base = os.path.basename(in_filename)
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words, comments = compile_glsl(in_filename, base + ".tmp")
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literals = []
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for i in range(0, len(words), COLUMNS):
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columns = ["0x%08x" % word for word in words[i:(i + COLUMNS)]]
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literals.append(" " * INDENT + ", ".join(columns) + ",")
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header = """#include <stdint.h>
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#if 0
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%s
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#endif
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static const uint32_t %s[%d] = {
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%s
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};
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""" % (comments, identifierize(base), len(words), "\n".join(literals))
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if out_filename:
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with open(out_filename, "w") as f:
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print(header, end="", file=f)
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else:
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print(header, end="")
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