/*
* This file is part of libbluray
* Copyright (C) 2010 William Hahne
* Copyright (C) 2016 Petri Hintukainen <phintuka@users.sourceforge.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
package org.dvb.ui;
public final class DVBAlphaComposite {
private DVBAlphaComposite(int rule) {
this(rule, 1.0f);
}
private DVBAlphaComposite(int rule, float alpha) {
this.rule = rule;
this.alpha = alpha;
}
public int getRule() {
return rule;
}
public float getAlpha() {
return alpha;
}
public static DVBAlphaComposite getInstance(int rule) {
switch (rule) {
case CLEAR:
return Clear;
case SRC:
return Src;
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;
default:
System.err.println("Unknown composite rule");
throw new IllegalArgumentException("Unknown rule");
}
}
public static DVBAlphaComposite getInstance(int rule, float alpha) {
if (rule < 1 || rule > 8) {
System.err.println("Unknown composite rule");
throw new IllegalArgumentException("Unknown rule");
}
if (alpha < 0.0f || alpha > 1.0f) {
System.err.println("Alpha value out of range");
throw new IllegalArgumentException("invalid alpha");
}
if (alpha >= 1.0f)
return getInstance(rule);
return new DVBAlphaComposite(rule, alpha);
}
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + Float.floatToIntBits(alpha);
result = prime * result + rule;
return result;
}
public boolean equals(Object obj) {
if (!(obj instanceof DVBAlphaComposite))
return false;
DVBAlphaComposite other = (DVBAlphaComposite) obj;
//if (Float.floatToIntBits(alpha) != Float.floatToIntBits(other.alpha))
if (Float.compare(alpha, other.alpha) != 0)
return false;
if (rule != other.rule)
return false;
return true;
}
public static final int CLEAR = 1;
public static final int SRC = 2;
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 DVBAlphaComposite Clear = new DVBAlphaComposite(CLEAR);
public static final DVBAlphaComposite Src = new DVBAlphaComposite(SRC);
public static final DVBAlphaComposite SrcOver = new DVBAlphaComposite(SRC_OVER);
public static final DVBAlphaComposite DstOver = new DVBAlphaComposite(DST_OVER);
public static final DVBAlphaComposite SrcIn = new DVBAlphaComposite(SRC_IN);
public static final DVBAlphaComposite DstIn = new DVBAlphaComposite(DST_IN);
public static final DVBAlphaComposite SrcOut = new DVBAlphaComposite(SRC_OUT);
public static final DVBAlphaComposite DstOut = new DVBAlphaComposite(DST_OUT);
private float alpha;
private int rule;
}