| #!/usr/bin/env python3 |
| # |
| # Copyright (C) 2016 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. |
| |
| """Compile GLSL to SPIR-V. |
| |
| Depends on glslangValidator. |
| """ |
| |
| import os |
| import sys |
| import subprocess |
| import struct |
| import re |
| |
| SPIRV_MAGIC = 0x07230203 |
| COLUMNS = 4 |
| INDENT = 4 |
| |
| in_filename = sys.argv[1] |
| out_filename = sys.argv[2] if len(sys.argv) > 2 else None |
| validator = sys.argv[3] if len(sys.argv) > 3 else \ |
| "../../../glslang/build/install/bin/glslangValidator" |
| |
| def identifierize(s): |
| # translate invalid chars |
| s = re.sub("[^0-9a-zA-Z_]", "_", s) |
| # translate leading digits |
| return re.sub("^[^a-zA-Z_]+", "_", s) |
| |
| def compile_glsl(filename, tmpfile): |
| # invoke glslangValidator |
| try: |
| args = [validator, "-V", "-H", "-o", tmpfile, filename] |
| output = subprocess.check_output(args, universal_newlines=True) |
| except subprocess.CalledProcessError as e: |
| print(e.output, file=sys.stderr) |
| exit(1) |
| |
| # read the temp file into a list of SPIR-V words |
| words = [] |
| with open(tmpfile, "rb") as f: |
| data = f.read() |
| assert(len(data) and len(data) % 4 == 0) |
| |
| # determine endianness |
| fmt = ("<" if data[0] == (SPIRV_MAGIC & 0xff) else ">") + "I" |
| for i in range(0, len(data), 4): |
| words.append(struct.unpack(fmt, data[i:(i + 4)])[0]) |
| |
| assert(words[0] == SPIRV_MAGIC) |
| |
| |
| # remove temp file |
| os.remove(tmpfile) |
| |
| return (words, output.rstrip()) |
| |
| base = os.path.basename(in_filename) |
| words, comments = compile_glsl(in_filename, base + ".tmp") |
| |
| literals = [] |
| for i in range(0, len(words), COLUMNS): |
| columns = ["0x%08x" % word for word in words[i:(i + COLUMNS)]] |
| literals.append(" " * INDENT + ", ".join(columns) + ",") |
| |
| header = """#include <stdint.h> |
| |
| #if 0 |
| %s |
| #endif |
| |
| static const uint32_t %s[%d] = { |
| %s |
| }; |
| """ % (comments, identifierize(base), len(words), "\n".join(literals)) |
| |
| if out_filename: |
| with open(out_filename, "w") as f: |
| print(header, end="", file=f) |
| else: |
| print(header, end="") |