/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @author Igor V. Stolyarov
*/
package com.google.code.appengine.awt;
import org.apache.harmony.awt.gl.ICompositeContext;
import org.apache.harmony.awt.internal.nls.Messages;
import com.google.code.appengine.awt.AlphaComposite;
import com.google.code.appengine.awt.Composite;
import com.google.code.appengine.awt.CompositeContext;
import com.google.code.appengine.awt.RenderingHints;
import com.google.code.appengine.awt.image.ColorModel;
public final class AlphaComposite implements Composite {
public static final int CLEAR = 1;
public static final int SRC = 2;
public static final int DST = 9;
public static final int SRC_OVER = 3;
public static final int DST_OVER = 4;
public static final int SRC_IN = 5;
public static final int DST_IN = 6;
public static final int SRC_OUT = 7;
public static final int DST_OUT = 8;
public static final int SRC_ATOP = 10;
public static final int DST_ATOP = 11;
public static final int XOR = 12;
public static final AlphaComposite Clear = new AlphaComposite(CLEAR);
public static final AlphaComposite Src = new AlphaComposite(SRC);
public static final AlphaComposite Dst = new AlphaComposite(DST);
public static final AlphaComposite SrcOver = new AlphaComposite(SRC_OVER);
public static final AlphaComposite DstOver = new AlphaComposite(DST_OVER);
public static final AlphaComposite SrcIn = new AlphaComposite(SRC_IN);
public static final AlphaComposite DstIn = new AlphaComposite(DST_IN);
public static final AlphaComposite SrcOut = new AlphaComposite(SRC_OUT);
public static final AlphaComposite DstOut = new AlphaComposite(DST_OUT);
public static final AlphaComposite SrcAtop = new AlphaComposite(SRC_ATOP);
public static final AlphaComposite DstAtop = new AlphaComposite(DST_ATOP);
public static final AlphaComposite Xor = new AlphaComposite(XOR);
private int rule;
private float alpha;
private AlphaComposite(int rule, float alpha){
if(rule < CLEAR || rule > XOR) {
// awt.11D=Unknown rule
throw new IllegalArgumentException(Messages.getString("awt.11D")); //$NON-NLS-1$
}
if(alpha < 0.0f || alpha > 1.0f) {
// awt.11E=Wrong alpha value
throw new IllegalArgumentException(Messages.getString("awt.11E")); //$NON-NLS-1$
}
this.rule = rule;
this.alpha = alpha;
}
private AlphaComposite(int rule){
this(rule, 1.0f);
}
public CompositeContext createContext(ColorModel srcColorModel,
ColorModel dstColorModel, RenderingHints hints) {
return new ICompositeContext(this, srcColorModel, dstColorModel);
}
@Override
public boolean equals(Object obj) {
if(!(obj instanceof AlphaComposite)) {
return false;
}
AlphaComposite other = (AlphaComposite)obj;
return (this.rule == other.getRule() && this.alpha == other.getAlpha());
}
@Override
public int hashCode() {
int hash = Float.floatToIntBits(alpha);
int tmp = hash >>> 24;
hash <<= 8;
hash |= tmp;
hash ^= rule;
return hash;
}
public int getRule() {
return rule;
}
public float getAlpha() {
return alpha;
}
public static AlphaComposite getInstance(int rule, float alpha) {
if(alpha == 1.0f) {
return getInstance(rule);
}
return new AlphaComposite(rule, alpha);
}
public static AlphaComposite getInstance(int rule) {
switch(rule){
case CLEAR:
return Clear;
case SRC:
return Src;
case DST:
return Dst;
case SRC_OVER:
return SrcOver;
case DST_OVER:
return DstOver;
case SRC_IN:
return SrcIn;
case DST_IN:
return DstIn;
case SRC_OUT:
return SrcOut;
case DST_OUT:
return DstOut;
case SRC_ATOP:
return SrcAtop;
case DST_ATOP:
return DstAtop;
case XOR:
return Xor;
default:
// awt.11D=Unknown rule
throw new IllegalArgumentException(Messages.getString("awt.11D")); //$NON-NLS-1$
}
}
}