TexL.java

/*
 *  This file is part of the Haven & Hearth game client.
 *  Copyright (C) 2009 Fredrik Tolf <fredrik@dolda2000.com>, and
 *                     Björn Johannessen <johannessen.bjorn@gmail.com>
 *
 *  Redistribution and/or modification of this file is subject to the
 *  terms of the GNU Lesser General Public License, version 3, as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  Other parts of this source tree adhere to other copying
 *  rights. Please see the file `COPYING' in the root directory of the
 *  source tree for details.
 *
 *  A copy the GNU Lesser General Public License is distributed along
 *  with the source tree of which this file is a part in the file
 *  `doc/LPGL-3'. If it is missing for any reason, please see the Free
 *  Software Foundation's website at <http://www.fsf.org/>, or write
 *  to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 *  Boston, MA 02111-1307 USA
 */

package haven;

import java.util.*;
import java.awt.image.*;
import java.nio.ByteBuffer;
import javax.media.opengl.*;
import haven.Defer.Future;

public abstract class TexL extends TexGL {
    protected Mipmapper mipmap = null;
    private Future<Prepared> decode = null;

    protected abstract BufferedImage fill();

    public TexL(Coord sz) {
	super(sz);
	if((sz.x != nextp2(sz.x)) || (sz.y != nextp2(sz.y)))
	    throw(new RuntimeException("TexL does not support non-power-of-two textures"));
    }

    public void mipmap(Mipmapper mipmap) {
	this.mipmap = mipmap;
	dispose();
    }

    private class Prepared {
	BufferedImage img;
	byte[][] data;
	int ifmt;

	private Prepared() {
	    img = fill();
	    if(!Utils.imgsz(img).equals(dim))
		throw(new RuntimeException("Generated TexL image from " + TexL.this + " does not match declared size"));
	    ifmt = TexI.detectfmt(img);
	    LinkedList<byte[]> data = new LinkedList<byte[]>();
	    if((ifmt == GL.GL_RGB) || (ifmt == GL2.GL_BGR)) {
		if((mipmap != null) && !(mipmap instanceof Mipmapper.Mipmapper3))
		    ifmt = -1;
	    }
	    if((ifmt == GL.GL_RGB) || (ifmt == GL2.GL_BGR)) {
		byte[] pixels = ((DataBufferByte)img.getRaster().getDataBuffer()).getData();
		data.add(pixels);
		if(mipmap != null) {
		    Coord msz = dim;
		    Mipmapper.Mipmapper3 alg = (Mipmapper.Mipmapper3)mipmap;
		    while((msz.x > 1) || (msz.y > 1)) {
			pixels = alg.gen3(msz, pixels, ifmt);
			data.add(pixels);
			msz = Mipmapper.nextsz(msz);
		    }
		}
	    } else {
		byte[] pixels;
		if((ifmt == GL.GL_RGBA) || (ifmt == GL.GL_BGRA)) {
		    pixels = ((DataBufferByte)img.getRaster().getDataBuffer()).getData();
		} else {
		    pixels = TexI.convert(img, dim);
		    ifmt = GL.GL_RGBA;
		}
		data.add(pixels);
		if(mipmap != null) {
		    Coord msz = dim;
		    while((msz.x > 1) || (msz.y > 1)) {
			pixels = mipmap.gen4(msz, pixels, ifmt);
			data.add(pixels);
			msz = Mipmapper.nextsz(msz);
		    }
		}
	    }
	    this.data = data.toArray(new byte[0][]);
	}
    }

    private Future<Prepared> prepare() {
	return(Defer.later(new Defer.Callable<Prepared>() {
		    public Prepared call() {
			Prepared ret = new Prepared();
			return(ret);
		    }
		}));
    }

    protected void fill(GOut g) {
	if(decode == null)
	    decode = prepare();
	Prepared prep = decode.get();
	decode = null;
	GL2 gl = g.gl;
	gl.glPixelStorei(GL.GL_UNPACK_ALIGNMENT, 1);
	Coord cdim = tdim;
	for(int i = 0; i < prep.data.length; i++) {
	    gl.glTexImage2D(GL.GL_TEXTURE_2D, i, GL.GL_RGBA, cdim.x, cdim.y, 0, prep.ifmt, GL.GL_UNSIGNED_BYTE, ByteBuffer.wrap(prep.data[i]));
	    cdim = Mipmapper.nextsz(cdim);
	}
    }
}