AddPNGChuck.d

module AddPNGChunk;

import std.file;
import Data, PNG;

void main(string[] args)
{
	if (args.length != 4)
		throw new Exception("Usage: AddPNGChunk Image.png ChunkID Filename.ext");

	auto png = new PNG(readData(args[1]));
	png.chunks = png.chunks[0..$-1] ~ PNGChunk(args[2], readData(args[3])) ~ png.chunks[$-1];
	write(args[1], png.compile.contents);
}