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package org.monte.media.tiff;

import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteOrder;
import java.util.Stack;
import javax.imageio.stream.ImageOutputStream;


public class TIFFOutputStream extends OutputStream {

    private ImageOutputStream out;
    private long offset;
    private Stack ifdStack=new Stack();

    private enum State {

        INITIALIZED, STARTED, FINISHED
    };
    private State state = State.INITIALIZED;
    private long firstIFDOffset = 8;

    public TIFFOutputStream(ImageOutputStream out) throws IOException {
        this.out = out;
        this.offset = out.getStreamPosition();
    }

    public void setByteOrder(ByteOrder bo) {
        if (state == State.INITIALIZED && bo != out.getByteOrder()) {
            throw new IllegalStateException("Can't change byte order within TIFF file");
        }
        out.setByteOrder(bo);
    }

    public ByteOrder getByteOrder() {
        return out.getByteOrder();
    }

    public long getStreamPosition() throws IOException {
        return out.getStreamPosition() - offset;
    }

    public void seek(long position) throws IOException {
        out.seek(position + offset);
    }

    @Override
    public void write(int b) throws IOException {
        ensureStarted();
        out.write(b);
    }

    @Override
    public void write(byte[] b, int off, int len) throws IOException {
        ensureStarted();
        out.write(b, off, len);
    }

    public void writeIFD(IFD ifd, long nextIFD) throws IOException {
        ensureStarted();
        writeSHORT(ifd.getCount());
        long ifdOffset=getStreamPosition();
        long valueOffset=getStreamPosition()+12*ifd.getCount()+4;
        for (int i=0,n=ifd.getCount();i