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Diffstat (limited to 'libjava/java/awt/AlphaComposite.java')
| -rw-r--r-- | libjava/java/awt/AlphaComposite.java | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git a/libjava/java/awt/AlphaComposite.java b/libjava/java/awt/AlphaComposite.java deleted file mode 100644 index 435cfd0..0000000 --- a/libjava/java/awt/AlphaComposite.java +++ /dev/null @@ -1,167 +0,0 @@ -/* AlphaComposite.java -- provides a context for performing alpha compositing - Copyright (C) 2002, 2005 Free Software Foundation, Inc. - -This file is part of GNU Classpath. - -GNU Classpath is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Classpath 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. - -You should have received a copy of the GNU General Public License -along with GNU Classpath; see the file COPYING. If not, write to the -Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301 USA. - -Linking this library statically or dynamically with other modules is -making a combined work based on this library. Thus, the terms and -conditions of the GNU General Public License cover the whole -combination. - -As a special exception, the copyright holders of this library give you -permission to link this library with independent modules to produce an -executable, regardless of the license terms of these independent -modules, and to copy and distribute the resulting executable under -terms of your choice, provided that you also meet, for each linked -independent module, the terms and conditions of the license of that -module. An independent module is a module which is not derived from -or based on this library. If you modify this library, you may extend -this exception to your version of the library, but you are not -obligated to do so. If you do not wish to do so, delete this -exception statement from your version. */ - - -package java.awt; - -import java.awt.image.ColorModel; -import java.util.LinkedHashMap; -import java.util.Map; - -/** - * - * @author Eric Blake (ebb9@email.byu.edu) - * @see Composite - * @see CompositeContext - * @since 1.3 - * @status updated to 1.4 except for createContext, needs documentation - */ -public final class AlphaComposite implements Composite -{ - /** Map Long to AlphaComposites. See getInstance for details. */ - private static final LinkedHashMap cache = new LinkedHashMap(11, 0.75f, true) - { - /** The largest the alpha composite cache can grow. */ - private static final int MAX_CACHE_SIZE = 2048; - - /** Prune stale entries. */ - protected boolean removeEldestEntry(Map.Entry eldest) - { // XXX - FIXME Use Map.Entry, not just Entry as gcj 3.1 workaround. - return size() > MAX_CACHE_SIZE; - } - }; - - 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 = getInstance(CLEAR); - public static final AlphaComposite Src = getInstance(SRC); - public static final AlphaComposite Dst = getInstance(DST); - public static final AlphaComposite SrcOver = getInstance(SRC_OVER); - public static final AlphaComposite DstOver = getInstance(DST_OVER); - public static final AlphaComposite SrcIn = getInstance(SRC_IN); - public static final AlphaComposite DstIn = getInstance(DST_IN); - public static final AlphaComposite SrcOut = getInstance(SRC_OUT); - public static final AlphaComposite DstOut = getInstance(DST_OUT); - public static final AlphaComposite SrcAtop = getInstance(SRC_ATOP); - public static final AlphaComposite DstAtop = getInstance(DST_ATOP); - public static final AlphaComposite Xor = getInstance(XOR); - - private final int rule; - private final float alpha; - private AlphaComposite(int rule, float alpha) - { - this.rule = rule; - this.alpha = alpha; - } - - /** - * Creates an AlphaComposite object with the specified rule. - * - * @param rule The compositing rule. - * - * @exception IllegalArgumentException If rule is not one of the following: - * CLEAR, SRC, DST, SRC_OVER, DST_OVER, SRC_IN, DST_IN, SRC_OUT, DST_OUT, - * SRC_ATOP, DST_ATOP, or XOR. - */ - public static AlphaComposite getInstance(int rule) - { - return getInstance(rule, 1); - } - - /** - * Creates an AlphaComposite object with the specified rule and the constant - * alpha to multiply with the alpha of the source. The source is multiplied - * with the specified alpha before being composited with the destination. - * - * @param rule The compositing rule. - * - * @exception IllegalArgumentException If rule is not one of the following: - * CLEAR, SRC, DST, SRC_OVER, DST_OVER, SRC_IN, DST_IN, SRC_OUT, DST_OUT, - * SRC_ATOP, DST_ATOP, or XOR. - */ - public static AlphaComposite getInstance(int rule, float alpha) - { - if (rule < CLEAR || rule > XOR || ! (alpha >= 0 && alpha <= 1)) - throw new IllegalArgumentException(); - // This long is guaranteed unique for all valid alpha composites. - Long l = new Long(rule + Double.doubleToLongBits(alpha)); - AlphaComposite a = (AlphaComposite) cache.get(l); - if (a == null) - { - a = new AlphaComposite(rule, alpha); - cache.put(l, a); - } - return a; - } - public CompositeContext createContext(ColorModel srcColorModel, - ColorModel dstColorModel, - RenderingHints hints) - { - // XXX Implement. Sun uses undocumented implementation class - // sun.java2d.SunCompositeContext. - throw new Error("not implemented"); - } - public float getAlpha() - { - return alpha; - } - public int getRule() - { - return rule; - } - public int hashCode() - { - return 31 * Float.floatToIntBits(alpha) + rule; - } - public boolean equals(Object o) - { - if (! (o instanceof AlphaComposite)) - return false; - AlphaComposite a = (AlphaComposite) o; - return rule == a.rule && alpha == a.alpha; - } -} // class AlphaComposite |