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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.nodes;
import net.java.joglutils.msg.actions.Action;
import net.java.joglutils.msg.actions.GLRenderAction;
import net.java.joglutils.msg.elements.BlendElement;
import net.java.joglutils.msg.elements.GLBlendElement;
import net.java.joglutils.msg.math.Vec4f;
/** Provides control over OpenGL blending modes. */
public class Blend extends Node {
private boolean enabled;
private Vec4f blendColor = new Vec4f();
private int srcFunc = ONE;
private int destFunc = ZERO;
private int blendEquation = FUNC_ADD;
static {
// Enable the elements this node affects for known actions
GLBlendElement.enable(GLRenderAction.getDefaultState());
}
/** One of the blend functions. See the OpenGL documentation for glBlendFunc for more details. */
public static final int ZERO = 1;
/** One of the blend functions. See the OpenGL documentation for glBlendFunc for more details. */
public static final int ONE = 2;
/** One of the blend functions. See the OpenGL documentation for glBlendFunc for more details. */
public static final int SRC_COLOR = 3;
/** One of the blend functions. See the OpenGL documentation for glBlendFunc for more details. */
public static final int ONE_MINUS_SRC_COLOR = 4;
/** One of the blend functions. See the OpenGL documentation for glBlendFunc for more details. */
public static final int DST_COLOR = 5;
/** One of the blend functions. See the OpenGL documentation for glBlendFunc for more details. */
public static final int ONE_MINUS_DST_COLOR = 6;
/** One of the blend functions. See the OpenGL documentation for glBlendFunc for more details. */
public static final int SRC_ALPHA = 7;
/** One of the blend functions. See the OpenGL documentation for glBlendFunc for more details. */
public static final int ONE_MINUS_SRC_ALPHA = 8;
/** One of the blend functions. See the OpenGL documentation for glBlendFunc for more details. */
public static final int DST_ALPHA = 9;
/** One of the blend functions. See the OpenGL documentation for glBlendFunc for more details. */
public static final int ONE_MINUS_DST_ALPHA = 10;
/** One of the blend functions. See the OpenGL documentation for glBlendFunc for more details. */
public static final int SRC_ALPHA_SATURATE = 11;
/** One of the blend functions. See the OpenGL documentation for glBlendFunc for more details. */
public static final int CONSTANT_COLOR = 12;
/** One of the blend functions. See the OpenGL documentation for glBlendFunc for more details. */
public static final int ONE_MINUS_CONSTANT_COLOR = 13;
/** One of the blend functions. See the OpenGL documentation for glBlendFunc for more details. */
public static final int CONSTANT_ALPHA = 14;
/** One of the blend functions. See the OpenGL documentation for glBlendFunc for more details. */
public static final int ONE_MINUS_CONSTANT_ALPHA = 15;
/** One of the blend equations. See the OpenGL documentation for glBlendEquation for more details. */
public static final int FUNC_ADD = 1;
/** One of the blend equations. See the OpenGL documentation for glBlendEquation for more details. */
public static final int FUNC_SUBTRACT = 2;
/** One of the blend equations. See the OpenGL documentation for glBlendEquation for more details. */
public static final int FUNC_REVERSE_SUBTRACT = 3;
/** One of the blend equations. See the OpenGL documentation for glBlendEquation for more details. */
public static final int MIN = 4;
/** One of the blend equations. See the OpenGL documentation for glBlendEquation for more details. */
public static final int MAX = 5;
/** Sets whether blending is enabled. Defaults to false. */
public void setEnabled(boolean enabled) {
this.enabled = enabled;
}
/** Returns whether blending is enabled. Defaults to false. */
public boolean getEnabled() {
return enabled;
}
/** Sets the source blending function to one of ZERO, ONE,
SRC_COLOR, ONE_MINUS_SRC_COLOR, DST_COLOR, ONE_MINUS_DST_COLOR,
SRC_ALPHA, ONE_MINUS_SRC_ALPHA, DST_ALPHA, ONE_MINUS_DST_ALPHA,
SRC_ALPHA_SATURATE, CONSTANT_COLOR, ONE_MINUS_CONSTANT_COLOR,
CONSTANT_ALPHA, or ONE_MINUS_CONSTANT_ALPHA. The default is ONE. */
public void setSourceFunc(int func) {
if (func < ZERO || func > ONE_MINUS_CONSTANT_ALPHA) {
throw new IllegalArgumentException("Illegal source blending function " + func);
}
srcFunc = func;
}
/** Returns the source blending function. The default is ONE. */
public int getSourceFunc() {
return srcFunc;
}
/** Sets the destination blending function to one of ZERO, ONE,
SRC_COLOR, ONE_MINUS_SRC_COLOR, DST_COLOR, ONE_MINUS_DST_COLOR,
SRC_ALPHA, ONE_MINUS_SRC_ALPHA, DST_ALPHA, ONE_MINUS_DST_ALPHA,
SRC_ALPHA_SATURATE, CONSTANT_COLOR, ONE_MINUS_CONSTANT_COLOR,
CONSTANT_ALPHA, or ONE_MINUS_CONSTANT_ALPHA. The default is
ZERO. */
public void setDestFunc(int func) {
if (func < ZERO || func > ONE_MINUS_CONSTANT_ALPHA) {
throw new IllegalArgumentException("Illegal destination blending function " + func);
}
destFunc = func;
}
/** Returns the destination blending function. The default is ZERO. */
public int getDestFunc() {
return destFunc;
}
/** Sets the blending equation to one of FUNC_ADD, FUNC_SUBTRACT,
FUNC_REVERSE_SUBTRACT, MIN, or MAX. Defaults to FUNC_ADD. */
public void setBlendEquation(int equation) {
if (equation < FUNC_ADD || equation > MAX) {
throw new IllegalArgumentException("Illegal blending equation " + equation);
}
this.blendEquation = equation;
}
/** Returns the blending equation. Defaults to FUNC_ADD. */
public int getBlendEquation() {
return blendEquation;
}
/** Sets the blending color; see the documentation for glBlendColor
for more details. Defaults to [0, 0, 0, 0]. */
public void setBlendColor(Vec4f color) {
blendColor.set(color);
}
/** Gets the blending color; see the documentation for glBlendColor
for more details. Defaults to [0, 0, 0, 0]. */
public Vec4f getBlendColor() {
return blendColor;
}
public void doAction(Action action) {
if (BlendElement.isEnabled(action.getState())) {
BlendElement.set(action.getState(),
getEnabled(),
getBlendColor(),
getSourceFunc(),
getDestFunc(),
getBlendEquation());
}
}
}
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