TexGL.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 static haven.GOut.checkerr;
import java.awt.Color;
import java.util.Collection;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.Map;
import javax.media.opengl.GL;
import javax.media.opengl.GL2;

public abstract class TexGL extends Tex {
	protected int id = -1;
	protected GL mygl = null;
	private Object idmon = new Object();
	protected Coord tdim;
	protected static Map<GL, Collection<Integer>> disposed = new HashMap<GL, Collection<Integer>>();
	public static boolean disableall = false;

	public TexGL(Coord sz) {
		super(sz);
		tdim = new Coord(nextp2(sz.x), nextp2(sz.y));
	}

	protected abstract void fill(GOut gl);

	private void create(GOut g) {
		GL gl = g.gl;
		int[] buf = new int[1];
		gl.glGenTextures(1, buf, 0);
		id = buf[0];
		mygl = gl;
		gl.glBindTexture(GL.GL_TEXTURE_2D, id);
		gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER, GL.GL_NEAREST);
		gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER, GL.GL_NEAREST);
		fill(g);
		checkerr(gl);
	}

	protected Color setenv(GL2 gl) {
		gl.glTexEnvi(GL2.GL_TEXTURE_ENV, GL2.GL_TEXTURE_ENV_MODE, GL2.GL_MODULATE);
		return (Color.WHITE);
	}

	Color blend(GOut g, Color amb) {
		Color c = g.getcolor();
		Color n = new Color((c.getRed() * amb.getRed()) / 255, (c.getGreen() * amb.getGreen()) / 255, (c.getBlue() * amb.getBlue()) / 255,
				(c.getAlpha() * amb.getAlpha()) / 255);
		return (n);
	}

	public void render(GOut g, Coord c, Coord ul, Coord br, Coord sz) {
		GL2 gl = g.gl;
		synchronized (idmon) {
			if ((id != -1) && (mygl != gl)) {
				dispose(mygl, id);
				id = -1;
			}
			if (id < 0)
				create(g);
			g.texsel(id);
		}
		Color amb = blend(g, setenv(gl));
		checkerr(gl);
		if (!disableall) {
			gl.glBegin(GL2.GL_QUADS);
			float l = ((float) ul.x) / ((float) tdim.x);
			float t = ((float) ul.y) / ((float) tdim.y);
			float r = ((float) br.x) / ((float) tdim.x);
			float b = ((float) br.y) / ((float) tdim.y);
			gl.glColor4f((float) amb.getRed() / 255.0f, (float) amb.getGreen() / 255.0f, (float) amb.getBlue() / 255.0f,
					(float) amb.getAlpha() / 255.0f);
			gl.glTexCoord2f(l, t);
			gl.glVertex3i(c.x, c.y, 0);
			gl.glTexCoord2f(r, t);
			gl.glVertex3i(c.x + sz.x, c.y, 0);
			gl.glTexCoord2f(r, b);
			gl.glVertex3i(c.x + sz.x, c.y + sz.y, 0);
			gl.glTexCoord2f(l, b);
			gl.glVertex3i(c.x, c.y + sz.y, 0);
			gl.glEnd();
			checkerr(gl);
		}
	}

	private static void dispose(GL gl, int id) {
		Collection<Integer> dc;
		synchronized (disposed) {
			dc = disposed.get(gl);
			if (dc == null) {
				dc = new LinkedList<Integer>();
				disposed.put(gl, dc);
			}
		}
		synchronized (dc) {
			dc.add(id);
		}
	}

	public void dispose() {
		synchronized (idmon) {
			if (id == -1)
				return;
			dispose(mygl, id);
			id = -1;
		}
	}

	protected void finalize() {
		dispose();
	}

	public static void disposeall(GL gl) {
		Collection<Integer> dc;
		synchronized (disposed) {
			dc = disposed.get(gl);
			if (dc == null)
				return;
		}
		synchronized (dc) {
			if (dc.isEmpty())
				return;
			int[] da = new int[dc.size()];
			int i = 0;
			for (int id : dc)
				da[i++] = id;
			dc.clear();
			gl.glDeleteTextures(da.length, da, 0);
		}
	}

	static {
		Console.setscmd("texdis", new Console.Command() {
			public void run(Console cons, String[] args) {
				disableall = (Integer.parseInt(args[1]) != 0);
			}
		});
	}
}