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/*
* Copyright (c) 2007 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
* MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
* ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
* DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
* DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
* SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for use
* in the design, construction, operation or maintenance of any nuclear
* facility.
*
*/
package net.java.joglutils.msg.elements;
import java.nio.*;
import javax.media.opengl.*;
import javax.media.opengl.glu.*;
import com.sun.opengl.util.texture.*;
import net.java.joglutils.msg.misc.*;
import net.java.joglutils.msg.nodes.*;
/** Represents the current texture, which is applied to any drawn
geometry if texture coordinates are also supplied, and performs
side-effects in OpenGL. */
public class GLTextureElement extends TextureElement {
// Boilerplate for concrete element subclasses
public Element newInstance() {
return new GLTextureElement();
}
public static GLTextureElement getInstance(State state) {
return (GLTextureElement) TextureElement.getInstance(state);
}
public static void enable(State defaultState) {
Element tmp = new GLTextureElement();
defaultState.setElement(tmp.getStateIndex(), tmp);
}
public void pop(State state, Element previousTopElement) {
// Put things back the way they were
switchTextures(((GLTextureElement) previousTopElement).texture, texture);
}
public void setElt(Texture2 texture) {
Texture2 prev = this.texture;
super.setElt(texture);
switchTextures(prev, texture);
}
private void switchTextures(Texture2 prev, Texture2 texture) {
GL gl = GLU.getCurrentGL();
Texture prevTexture = null;
Texture curTexture = null;
int texEnvMode = 0;
if (prev != null) {
prevTexture = prev.getTexture();
}
if (texture != null) {
curTexture = texture.getTexture();
texEnvMode = texture.getTexEnvMode();
}
// FIXME: should be smarter about this; if the target is the same
// for the previous and current textures, just bind the new one
if (prevTexture != null) {
prevTexture.disable();
}
if (curTexture != null) {
curTexture.enable();
curTexture.bind();
int glEnvMode = 0;
switch (texEnvMode) {
case Texture2.MODULATE: glEnvMode = GL.GL_MODULATE; break;
case Texture2.DECAL: glEnvMode = GL.GL_DECAL; break;
case Texture2.BLEND: glEnvMode = GL.GL_BLEND; break;
case Texture2.REPLACE: glEnvMode = GL.GL_REPLACE; break;
}
gl.glTexEnvi(GL.GL_TEXTURE_ENV, GL.GL_TEXTURE_ENV_MODE, glEnvMode);
}
}
}
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