blob: 266ad37f1ea7b4e67de2a8c053f9c3cb3cb4c927 [file] [log] [blame]
Copyright 2015 Google Inc.
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
import argparse
def bytes_from_file(f, chunksize=8192):
while True:
chunk =
if chunk:
for b in chunk:
if isinstance(b, str):
# python 2
yield ord(b)
# python 3
yield b
def main():
parser = argparse.ArgumentParser(
description='Convert resource files to embedded read only data.',
epilog='''The output (when compiled and linked) can be used as:
struct SkEmbeddedResource {const uint8_t* data; const size_t size;};
struct SkEmbeddedHeader {const SkEmbeddedResource* entries; const int count;};
extern "C" SkEmbeddedHeader const NAME;''')
parser.add_argument('--align', default=1, type=int,
help='minimum alignment (in bytes) of resource data')
parser.add_argument('--name', default='_resource', type=str,
help='the name of the c identifier to export')
parser.add_argument('--input', required=True, type=argparse.FileType('rb'),
nargs='+', help='list of resource files to embed')
parser.add_argument('--output', required=True, type=argparse.FileType('w'),
help='the name of the cpp file to output')
args = parser.parse_args()
out = args.output.write;
out('#include <stddef.h>\n')
out('#include <stdint.h>\n')
# Write the resources.
index = 0
for f in args.input:
out('alignas({1:d}) static const uint8_t resource{0:d}[] = {{\n'
.format(index, args.align))
bytes_written = 0
bytes_on_line = 0
for b in bytes_from_file(f):
out(hex(b) + ',')
bytes_written += 1
bytes_on_line += 1
if bytes_on_line >= 32:
bytes_on_line = 0
out('static const size_t resource{0:d}_size = {1:d};\n'
.format(index, bytes_written))
index += 1
# Write the resource entries.
out('struct SkEmbeddedResource { const uint8_t* d; const size_t s; };\n')
out('static const SkEmbeddedResource header[] = {\n')
index = 0
for f in args.input:
out(' {{ resource{0:d}, resource{0:d}_size }},\n'.format(index))
index += 1
out('static const int header_count = {0:d};\n'.format(index))
# Export the resource header.
out('struct SkEmbeddedHeader {const SkEmbeddedResource* e; const int c;};\n')
out('extern "C" const SkEmbeddedHeader {0:s} = {{ header, header_count }};\n'
if __name__ == "__main__":