| /* |
| * Copyright (c) 2003, 2006, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.font; |
| |
| import sun.java2d.Disposer; |
| import sun.java2d.DisposerRecord; |
| |
| /* |
| * This keeps track of data that needs to be cleaned up once a |
| * strike is freed. |
| * a) The native memory that is the glyph image cache. |
| * b) removing the "desc" key from the strike's map. |
| * This is safe to do because this disposer is invoked only when the |
| * reference object has been cleared, which means the value indexed by |
| * this key is just an empty reference object. |
| * It is possible that a new FontStrike has been created that would |
| * be referenced by the same (equals) key. If it is placed in the map |
| * before this disposer is executed, then we do not want to remove that |
| * object. We should only remove an object where the value is null. |
| * So we first verify that the key still points to a cleared reference. |
| * Updates to the map thus need to be synchronized. |
| * |
| * A WeakHashmap will automatically clean up, but we might maintain a |
| * reference to the "desc" key in the FontStrike (value) which would |
| * prevent the keys from being discarded. And since the strike is the only |
| * place is likely we would maintain such a strong reference, then the map |
| * entries would be removed much more promptly than we need. |
| */ |
| |
| class FontStrikeDisposer |
| implements DisposerRecord, Disposer.PollDisposable { |
| |
| Font2D font2D; |
| FontStrikeDesc desc; |
| long[] longGlyphImages; |
| int [] intGlyphImages; |
| int [][] segIntGlyphImages; |
| long[][] segLongGlyphImages; |
| long pScalerContext = 0L; |
| boolean disposed = false; |
| boolean comp = false; |
| |
| public FontStrikeDisposer(Font2D font2D, FontStrikeDesc desc, |
| long pContext, int[] images) { |
| this.font2D = font2D; |
| this.desc = desc; |
| this.pScalerContext = pContext; |
| this.intGlyphImages = images; |
| } |
| |
| public FontStrikeDisposer(Font2D font2D, FontStrikeDesc desc, |
| long pContext, long[] images) { |
| this.font2D = font2D; |
| this.desc = desc; |
| this.pScalerContext = pContext; |
| this.longGlyphImages = images; |
| } |
| |
| public FontStrikeDisposer(Font2D font2D, FontStrikeDesc desc, |
| long pContext) { |
| this.font2D = font2D; |
| this.desc = desc; |
| this.pScalerContext = pContext; |
| } |
| |
| public FontStrikeDisposer(Font2D font2D, FontStrikeDesc desc) { |
| this.font2D = font2D; |
| this.desc = desc; |
| this.comp = true; |
| } |
| |
| public synchronized void dispose() { |
| if (!disposed) { |
| font2D.removeFromCache(desc); |
| StrikeCache.disposeStrike(this); |
| disposed = true; |
| } |
| } |
| } |