1 /*
2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
142 *
143 * It also appears desirable to remove all the entries from the
144 * cache so no other code will pick them up. But we can't just
145 * 'delete' them as code may be using them. And simply dropping
146 * the reference to the cache will make the reference objects
147 * unreachable and so they will not get disposed.
148 * Since a strike may hold (via java arrays) native pointers to many
149 * rasterised glyphs, this would be a memory leak.
150 * The solution is :
151 * - to move all the entries to another map where they
152 * are no longer locatable
153 * - update FontStrikeDisposer to be able to distinguish which
154 * map they are held in via a boolean flag
155 * Since this isn't expected to be anything other than an extremely
156 * rare maybe it is not worth doing this last part.
157 */
158 synchronized void deregisterFontAndClearStrikeCache() {
159 SunFontManager fm = SunFontManager.getInstance();
160 fm.deRegisterBadFont(this);
161
162 for (Reference strikeRef : strikeCache.values()) {
163 if (strikeRef != null) {
164 /* NB we know these are all FileFontStrike instances
165 * because the cache is on this FileFont
166 */
167 FileFontStrike strike = (FileFontStrike)strikeRef.get();
168 if (strike != null && strike.pScalerContext != 0L) {
169 scaler.invalidateScalerContext(strike.pScalerContext);
170 }
171 }
172 }
173 if (scaler != null) {
174 scaler.dispose();
175 }
176 scaler = FontScaler.getNullScaler();
177 }
178
179 StrikeMetrics getFontMetrics(long pScalerContext) {
180 try {
181 return getScaler().getFontMetrics(pScalerContext);
182 } catch (FontScalerException fe) {
244 protected abstract FontScaler getScaler();
245
246 protected long getUnitsPerEm() {
247 return getScaler().getUnitsPerEm();
248 }
249
250 private static class CreatedFontFileDisposerRecord
251 implements DisposerRecord {
252
253 File fontFile = null;
254 CreatedFontTracker tracker;
255
256 private CreatedFontFileDisposerRecord(File file,
257 CreatedFontTracker tracker) {
258 fontFile = file;
259 this.tracker = tracker;
260 }
261
262 public void dispose() {
263 java.security.AccessController.doPrivileged(
264 new java.security.PrivilegedAction() {
265 public Object run() {
266 if (fontFile != null) {
267 try {
268 if (tracker != null) {
269 tracker.subBytes((int)fontFile.length());
270 }
271 /* REMIND: is it possible that the file is
272 * still open? It will be closed when the
273 * font2D is disposed but could this code
274 * execute first? If so the file would not
275 * be deleted on MS-windows.
276 */
277 fontFile.delete();
278 /* remove from delete on exit hook list : */
279 // FIXME: still need to be refactored
280 SunFontManager.getInstance().tmpFontFiles.remove(fontFile);
281 } catch (Exception e) {
282 }
283 }
284 return null;
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1 /*
2 * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
142 *
143 * It also appears desirable to remove all the entries from the
144 * cache so no other code will pick them up. But we can't just
145 * 'delete' them as code may be using them. And simply dropping
146 * the reference to the cache will make the reference objects
147 * unreachable and so they will not get disposed.
148 * Since a strike may hold (via java arrays) native pointers to many
149 * rasterised glyphs, this would be a memory leak.
150 * The solution is :
151 * - to move all the entries to another map where they
152 * are no longer locatable
153 * - update FontStrikeDisposer to be able to distinguish which
154 * map they are held in via a boolean flag
155 * Since this isn't expected to be anything other than an extremely
156 * rare maybe it is not worth doing this last part.
157 */
158 synchronized void deregisterFontAndClearStrikeCache() {
159 SunFontManager fm = SunFontManager.getInstance();
160 fm.deRegisterBadFont(this);
161
162 for (Reference<FontStrike> strikeRef : strikeCache.values()) {
163 if (strikeRef != null) {
164 /* NB we know these are all FileFontStrike instances
165 * because the cache is on this FileFont
166 */
167 FileFontStrike strike = (FileFontStrike)strikeRef.get();
168 if (strike != null && strike.pScalerContext != 0L) {
169 scaler.invalidateScalerContext(strike.pScalerContext);
170 }
171 }
172 }
173 if (scaler != null) {
174 scaler.dispose();
175 }
176 scaler = FontScaler.getNullScaler();
177 }
178
179 StrikeMetrics getFontMetrics(long pScalerContext) {
180 try {
181 return getScaler().getFontMetrics(pScalerContext);
182 } catch (FontScalerException fe) {
244 protected abstract FontScaler getScaler();
245
246 protected long getUnitsPerEm() {
247 return getScaler().getUnitsPerEm();
248 }
249
250 private static class CreatedFontFileDisposerRecord
251 implements DisposerRecord {
252
253 File fontFile = null;
254 CreatedFontTracker tracker;
255
256 private CreatedFontFileDisposerRecord(File file,
257 CreatedFontTracker tracker) {
258 fontFile = file;
259 this.tracker = tracker;
260 }
261
262 public void dispose() {
263 java.security.AccessController.doPrivileged(
264 new java.security.PrivilegedAction<Object>() {
265 public Object run() {
266 if (fontFile != null) {
267 try {
268 if (tracker != null) {
269 tracker.subBytes((int)fontFile.length());
270 }
271 /* REMIND: is it possible that the file is
272 * still open? It will be closed when the
273 * font2D is disposed but could this code
274 * execute first? If so the file would not
275 * be deleted on MS-windows.
276 */
277 fontFile.delete();
278 /* remove from delete on exit hook list : */
279 // FIXME: still need to be refactored
280 SunFontManager.getInstance().tmpFontFiles.remove(fontFile);
281 } catch (Exception e) {
282 }
283 }
284 return null;
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