Function load_file

deps/lodepng/lodepng.cpp:6087–6093

#ifdef LODEPNG_COMPILE_DISK
unsigned load_file(std::vector<unsigned char>& buffer, const std::string& filename)
{
  long size = lodepng_filesize(filename.c_str());
  if(size < 0) return 78;
  buffer.resize((size_t)size);
  return size == 0 ? 0 : lodepng_buffer_file(&buffer[0], (size_t)size, filename.c_str());
}

/*write given buffer to the file, overwriting the file, it doesn't append to it.*/
unsigned save_file(const std::vector<unsigned char>& buffer, const std::string& filename)