1 /*
2 * Copyright (c) 2007, 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
23 * questions.
24 */
25
26 package sun.font;
27
28 import java.awt.geom.GeneralPath;
29 import java.awt.geom.Point2D;
30 import java.awt.geom.Rectangle2D;
31 import java.lang.ref.WeakReference;
32
33 /* This is Freetype based implementation of FontScaler.
34 *
35 * Note that in case of runtime error it is expected that
36 * native code will release all native resources and
37 * call invalidateScaler() (that will throw FontScalerException).
38 *
39 * Note that callee is responsible for releasing native scaler context.
40 */
41 class FreetypeFontScaler extends FontScaler {
42 /* constants aligned with native code */
43 private static final int TRUETYPE_FONT = 1;
44 private static final int TYPE1_FONT = 2;
45
46 static {
47 /* At the moment fontmanager library depends on freetype library
48 and therefore no need to load it explicitly here */
49 FontManagerNativeLibrary.load();
50 initIDs(FreetypeFontScaler.class);
51 }
52
53 private static native void initIDs(Class<?> FFS);
54
55 private void invalidateScaler() throws FontScalerException {
56 nativeScaler = 0;
57 font = null;
58 throw new FontScalerException();
59 }
60
61 public FreetypeFontScaler(Font2D font, int indexInCollection,
62 boolean supportsCJK, int filesize) {
63 int fonttype = TRUETYPE_FONT;
64 if (font instanceof Type1Font) {
65 fonttype = TYPE1_FONT;
66 }
67 nativeScaler = initNativeScaler(font,
68 fonttype,
69 indexInCollection,
70 supportsCJK,
71 filesize);
72 this.font = new WeakReference<>(font);
73 }
74
75 synchronized StrikeMetrics getFontMetrics(long pScalerContext)
76 throws FontScalerException {
77 if (nativeScaler != 0L) {
78 return getFontMetricsNative(font.get(),
79 pScalerContext,
80 nativeScaler);
81 }
82 return FontScaler.getNullScaler().getFontMetrics(0L);
83 }
84
85 synchronized float getGlyphAdvance(long pScalerContext, int glyphCode)
86 throws FontScalerException {
87 if (nativeScaler != 0L) {
88 return getGlyphAdvanceNative(font.get(),
89 pScalerContext,
90 nativeScaler,
91 glyphCode);
92 }
93 return FontScaler.getNullScaler().
94 getGlyphAdvance(0L, glyphCode);
95 }
96
97 synchronized void getGlyphMetrics(long pScalerContext,
98 int glyphCode, Point2D.Float metrics)
99 throws FontScalerException {
100 if (nativeScaler != 0L) {
101 getGlyphMetricsNative(font.get(),
102 pScalerContext,
103 nativeScaler,
104 glyphCode,
105 metrics);
106 return;
107 }
108 FontScaler.getNullScaler().
109 getGlyphMetrics(0L, glyphCode, metrics);
110 }
111
112 synchronized long getGlyphImage(long pScalerContext, int glyphCode)
113 throws FontScalerException {
114 if (nativeScaler != 0L) {
115 return getGlyphImageNative(font.get(),
116 pScalerContext,
117 nativeScaler,
118 glyphCode);
119 }
120 return FontScaler.getNullScaler().
121 getGlyphImage(0L, glyphCode);
122 }
123
124 synchronized Rectangle2D.Float getGlyphOutlineBounds(
125 long pScalerContext, int glyphCode)
126 throws FontScalerException {
127 if (nativeScaler != 0L) {
128 return getGlyphOutlineBoundsNative(font.get(),
129 pScalerContext,
130 nativeScaler,
131 glyphCode);
132 }
133 return FontScaler.getNullScaler().
134 getGlyphOutlineBounds(0L,glyphCode);
135 }
136
137 synchronized GeneralPath getGlyphOutline(
138 long pScalerContext, int glyphCode, float x, float y)
139 throws FontScalerException {
140 if (nativeScaler != 0L) {
141 return getGlyphOutlineNative(font.get(),
142 pScalerContext,
143 nativeScaler,
144 glyphCode,
145 x, y);
146 }
147 return FontScaler.getNullScaler().
148 getGlyphOutline(0L, glyphCode, x,y);
149 }
150
151 synchronized GeneralPath getGlyphVectorOutline(
152 long pScalerContext, int[] glyphs, int numGlyphs,
153 float x, float y) throws FontScalerException {
154 if (nativeScaler != 0L) {
155 return getGlyphVectorOutlineNative(font.get(),
156 pScalerContext,
157 nativeScaler,
158 glyphs,
159 numGlyphs,
160 x, y);
161 }
162 return FontScaler
163 .getNullScaler().getGlyphVectorOutline(0L, glyphs, numGlyphs, x, y);
164 }
165
166 synchronized long getLayoutTableCache() throws FontScalerException {
167 return getLayoutTableCacheNative(nativeScaler);
168 }
169
170 public synchronized void dispose() {
171 if (nativeScaler != 0L) {
172 disposeNativeScaler(font.get(), nativeScaler);
173 nativeScaler = 0L;
174 }
175 }
176
177 synchronized int getNumGlyphs() throws FontScalerException {
178 if (nativeScaler != 0L) {
179 return getNumGlyphsNative(nativeScaler);
180 }
181 return FontScaler.getNullScaler().getNumGlyphs();
182 }
183
184 synchronized int getMissingGlyphCode() throws FontScalerException {
185 if (nativeScaler != 0L) {
186 return getMissingGlyphCodeNative(nativeScaler);
187 }
188 return FontScaler.getNullScaler().getMissingGlyphCode();
189 }
190
191 synchronized int getGlyphCode(char charCode) throws FontScalerException {
192 if (nativeScaler != 0L) {
193 return getGlyphCodeNative(font.get(), nativeScaler, charCode);
194 }
195 return FontScaler.getNullScaler().getGlyphCode(charCode);
196 }
197
198 synchronized Point2D.Float getGlyphPoint(long pScalerContext,
199 int glyphCode, int ptNumber)
200 throws FontScalerException {
201 if (nativeScaler != 0L) {
202 return getGlyphPointNative(font.get(), pScalerContext,
203 nativeScaler, glyphCode, ptNumber);
204 }
205 return FontScaler.getNullScaler().getGlyphPoint(
206 pScalerContext, glyphCode, ptNumber);
207 }
208
209 synchronized long getUnitsPerEm() {
210 return getUnitsPerEMNative(nativeScaler);
211 }
212
213 long createScalerContext(double[] matrix,
214 int aa, int fm, float boldness, float italic,
215 boolean disableHinting) {
216 if (nativeScaler != 0L) {
217 return createScalerContextNative(nativeScaler, matrix,
218 aa, fm, boldness, italic);
219 }
220 return NullFontScaler.getNullScalerContext();
221 }
222
223 //Note: native methods can throw RuntimeException if processing fails
224 private native long initNativeScaler(Font2D font, int type,
225 int indexInCollection, boolean supportsCJK, int filesize);
226 private native StrikeMetrics getFontMetricsNative(Font2D font,
227 long pScalerContext, long pScaler);
228 private native float getGlyphAdvanceNative(Font2D font,
229 long pScalerContext, long pScaler, int glyphCode);
230 private native void getGlyphMetricsNative(Font2D font,
231 long pScalerContext, long pScaler,
232 int glyphCode, Point2D.Float metrics);
233 private native long getGlyphImageNative(Font2D font,
234 long pScalerContext, long pScaler, int glyphCode);
235 private native Rectangle2D.Float getGlyphOutlineBoundsNative(Font2D font,
236 long pScalerContext, long pScaler, int glyphCode);
237 private native GeneralPath getGlyphOutlineNative(Font2D font,
238 long pScalerContext, long pScaler,
239 int glyphCode, float x, float y);
240 private native GeneralPath getGlyphVectorOutlineNative(Font2D font,
241 long pScalerContext, long pScaler,
242 int[] glyphs, int numGlyphs, float x, float y);
243 native Point2D.Float getGlyphPointNative(Font2D font,
244 long pScalerContext, long pScaler, int glyphCode, int ptNumber);
245
246 private native long getLayoutTableCacheNative(long pScaler);
247
248 private native void disposeNativeScaler(Font2D font2D, long pScaler);
249
250 private native int getGlyphCodeNative(Font2D font, long pScaler, char charCode);
251 private native int getNumGlyphsNative(long pScaler);
252 private native int getMissingGlyphCodeNative(long pScaler);
253
254 private native long getUnitsPerEMNative(long pScaler);
255
256 native long createScalerContextNative(long pScaler, double[] matrix,
257 int aa, int fm, float boldness, float italic);
258
259 /* Freetype scaler context does not contain any pointers that
260 has to be invalidated if native scaler is bad */
261 void invalidateScalerContext(long pScalerContext) {}
262 }