4632N/A/*
4632N/A * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
4632N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4632N/A *
4632N/A * This code is free software; you can redistribute it and/or modify it
4632N/A * under the terms of the GNU General Public License version 2 only, as
4632N/A * published by the Free Software Foundation. Oracle designates this
4632N/A * particular file as subject to the "Classpath" exception as provided
4632N/A * by Oracle in the LICENSE file that accompanied this code.
4632N/A *
4632N/A * This code is distributed in the hope that it will be useful, but WITHOUT
4632N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
4632N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
4632N/A * version 2 for more details (a copy is included in the LICENSE file that
4632N/A * accompanied this code).
4632N/A *
4632N/A * You should have received a copy of the GNU General Public License version
4632N/A * 2 along with this work; if not, write to the Free Software Foundation,
4632N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
4632N/A *
4632N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
4632N/A * or visit www.oracle.com if you need additional information or have any
4632N/A * questions.
4632N/A */
4632N/A
4632N/Apackage sun.font;
4632N/A
4632N/A/*
4632N/A * This keeps track of data that needs to be cleaned up once a
4632N/A * strike is freed.
4632N/A * a) The native memory that is the glyph image cache.
4632N/A * b) removing the "desc" key from the strike's map.
4632N/A * This is safe to do because this disposer is invoked only when the
4632N/A * reference object has been cleared, which means the value indexed by
4632N/A * this key is just an empty reference object.
4632N/A * It is possible that a new FontStrike has been created that would
4632N/A * be referenced by the same (equals) key. If it is placed in the map
4632N/A * before this disposer is executed, then we do not want to remove that
4632N/A * object. We should only remove an object where the value is null.
4632N/A * So we first verify that the key still points to a cleared reference.
4632N/A * Updates to the map thus need to be synchronized.
4632N/A *
4632N/A * A WeakHashmap will automatically clean up, but we might maintain a
4632N/A * reference to the "desc" key in the FontStrike (value) which would
4632N/A * prevent the keys from being discarded. And since the strike is the only
4632N/A * place is likely we would maintain such a strong reference, then the map
4632N/A * entries would be removed much more promptly than we need.
4632N/A */
4632N/Aclass CStrikeDisposer extends FontStrikeDisposer {
4632N/A
4632N/A long pNativeScalerContext;
4632N/A
4632N/A public CStrikeDisposer(Font2D font2D, FontStrikeDesc desc,
4632N/A long pContext, int[] images)
4632N/A {
4632N/A super(font2D, desc, 0L, images);
4632N/A pNativeScalerContext = pContext;
4632N/A }
4632N/A
4632N/A public CStrikeDisposer(Font2D font2D, FontStrikeDesc desc,
4632N/A long pContext, long[] images)
4632N/A {
4632N/A super(font2D, desc, 0L, images);
4632N/A pNativeScalerContext = pContext;
4632N/A }
4632N/A
4632N/A public CStrikeDisposer(Font2D font2D, FontStrikeDesc desc,
4632N/A long pContext)
4632N/A {
4632N/A super(font2D, desc, 0L);
4632N/A pNativeScalerContext = pContext;
4632N/A }
4632N/A
4632N/A public CStrikeDisposer(Font2D font2D, FontStrikeDesc desc) {
4632N/A super(font2D, desc);
4632N/A }
4632N/A
4632N/A public synchronized void dispose() {
4632N/A if (!disposed) {
4632N/A if (pNativeScalerContext != 0L) {
4632N/A freeNativeScalerContext(pNativeScalerContext);
4632N/A }
4632N/A super.dispose();
4632N/A }
4632N/A }
4632N/A
4632N/A private native void freeNativeScalerContext(long pContext);
4877N/A
4877N/A protected static native void removeGlyphInfoFromCache(long glyphInfo);
4632N/A}