void write_bitmap(char const * path, SampleBuffer const & buffer) {
FILE * fd = fopen(path, "wb");
BitmapHeader header;
BitmapInfo info = make_info(buffer.get_width(), buffer.get_height());
header.size() = sizeof(header) + sizeof(info) + buffer.get_size() * sizeof(uint32);
header.offset() = sizeof(header) + sizeof(info);
fwrite(&header, sizeof(header), 1, fd);
fwrite(&info, sizeof(info), 1, fd);
buffer.write_bitmap(fd);
fclose(fd);
}
