1 /*
2 * Copyright (c) 2008, 2019, 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.util.Locale;
29
30 import sun.awt.SunHints;
31 import sun.awt.SunToolkit;
32 import sun.util.logging.PlatformLogger;
33
34 /**
35 * Small utility class to manage FontConfig.
36 */
37 public class FontConfigManager {
38
39 static boolean fontConfigFailed = false;
40
41 /* This is populated by native */
42 private static final FontConfigInfo fcInfo = new FontConfigInfo();
43
44 /* Begin support for GTK Look and Feel - query libfontconfig and
45 * return a composite Font to Swing that uses the desktop font(s).
46 */
47
48 /* These next three classes are just data structures.
49 */
50 public static class FontConfigFont {
51 public String familyName; // eg Bitstream Vera Sans
52 public String styleStr; // eg Bold
53 public String fullName; // eg Bitstream Vera Sans Bold
54 public String fontFile; // eg /usr/X11/lib/fonts/foo.ttf
55 }
56
57 public static class FcCompFont {
58 public String fcName; // eg sans
59 public String fcFamily; // eg sans
60 public String jdkName; // eg sansserif
61 public int style; // eg 0=PLAIN
62 public FontConfigFont firstFont;
63 public FontConfigFont[] allFonts;
64 //boolean preferBitmaps; // if embedded bitmaps preferred over AA
65 public CompositeFont compFont; // null if not yet created/known.
66 }
67
68 public static class FontConfigInfo {
69 public int fcVersion;
70 public String[] cacheDirs = new String[4];
71 }
72
73 /* fontconfig recognises slants roman, italic, as well as oblique,
74 * and a slew of weights, where the ones that matter here are
75 * regular and bold.
76 * To fully qualify what we want, we can for example ask for (eg)
77 * Font.PLAIN : "serif:regular:roman"
78 * Font.BOLD : "serif:bold:roman"
79 * Font.ITALIC : "serif:regular:italic"
80 * Font.BOLD|Font.ITALIC : "serif:bold:italic"
81 */
82 private static String[] fontConfigNames = {
83 "sans:regular:roman",
84 "sans:bold:roman",
85 "sans:regular:italic",
86 "sans:bold:italic",
87
88 "serif:regular:roman",
89 "serif:bold:roman",
90 "serif:regular:italic",
91 "serif:bold:italic",
92
93 "monospace:regular:roman",
94 "monospace:bold:roman",
95 "monospace:regular:italic",
96 "monospace:bold:italic",
97 };
98
99 /* This array has the array elements created in Java code and is
100 * passed down to native to be filled in.
101 */
102 private FcCompFont[] fontConfigFonts;
103
104 /**
105 * Instantiates a new FontConfigManager getting the default instance
106 * of FontManager from the FontManagerFactory.
107 */
108 public FontConfigManager() {
109 }
110
111 /* Called from code that needs to know what are the AA settings
112 * that apps using FC would pick up for the default desktop font.
113 * Note apps can change the default desktop font. etc, so this
114 * isn't certain to be right but its going to correct for most cases.
115 * Native return values map to the text aa values in sun.awt.SunHints.
116 * which is used to look up the renderinghint value object.
117 */
118 public static Object getFontConfigAAHint() {
119 return getFontConfigAAHint("sans");
120 }
121
122 /* This is public solely so that for debugging purposes it can be called
123 * with other names, which might (eg) include a size, eg "sans-24"
124 * The return value is a text aa rendering hint value.
125 * Normally we should call the no-args version.
126 */
127 public static Object getFontConfigAAHint(String fcFamily) {
128 if (FontUtilities.isWindows) {
129 return null;
130 } else {
131 int hint = getFontConfigAASettings(getFCLocaleStr(), fcFamily);
132 if (hint < 0) {
133 return null;
134 } else {
135 return SunHints.Value.get(SunHints.INTKEY_TEXT_ANTIALIASING,
136 hint);
137 }
138 }
139 }
140
141
142 private static String getFCLocaleStr() {
143 Locale l = SunToolkit.getStartupLocale();
144 String localeStr = l.getLanguage();
145 String country = l.getCountry();
146 if (!country.isEmpty()) {
147 localeStr = localeStr + "-" + country;
148 }
149 return localeStr;
150 }
151
152 /* This does cause the native libfontconfig to be loaded and unloaded,
153 * but it does not incur the overhead of initialisation of its
154 * data structures, so shouldn't have a measurable impact.
155 */
156 public static native int getFontConfigVersion();
157
158 /* This can be made public if it's needed to force a re-read
159 * rather than using the cached values. The re-read would be needed
160 * only if some event signalled that the fontconfig has changed.
161 * In that event this method would need to return directly the array
162 * to be used by the caller in case it subsequently changed.
163 */
164 public synchronized void initFontConfigFonts(boolean includeFallbacks) {
165
166 if (fontConfigFonts != null) {
167 if (!includeFallbacks || (fontConfigFonts[0].allFonts != null)) {
168 return;
169 }
170 }
171
172 if (FontUtilities.isWindows || fontConfigFailed) {
173 return;
174 }
175
176 long t0 = 0;
177 if (FontUtilities.isLogging()) {
178 t0 = System.nanoTime();
179 }
180
181 FcCompFont[] fontArr = new FcCompFont[fontConfigNames.length];
182
183 for (int i = 0; i< fontArr.length; i++) {
184 fontArr[i] = new FcCompFont();
185 fontArr[i].fcName = fontConfigNames[i];
186 int colonPos = fontArr[i].fcName.indexOf(':');
187 fontArr[i].fcFamily = fontArr[i].fcName.substring(0, colonPos);
188 fontArr[i].jdkName = FontUtilities.mapFcName(fontArr[i].fcFamily);
189 fontArr[i].style = i % 4; // depends on array order.
190 }
191 getFontConfig(getFCLocaleStr(), fcInfo, fontArr, includeFallbacks);
192 FontConfigFont anyFont = null;
193 /* If don't find anything (eg no libfontconfig), then just return */
194 for (int i = 0; i< fontArr.length; i++) {
195 FcCompFont fci = fontArr[i];
196 if (fci.firstFont == null) {
197 if (FontUtilities.isLogging()) {
198 PlatformLogger logger = FontUtilities.getLogger();
199 logger.info("Fontconfig returned no font for " +
200 fontArr[i].fcName);
201 }
202 fontConfigFailed = true;
203 } else if (anyFont == null) {
204 anyFont = fci.firstFont;
205 }
206 }
207
208 if (anyFont == null) {
209 if (FontUtilities.isLogging()) {
210 PlatformLogger logger = FontUtilities.getLogger();
211 logger.info("Fontconfig returned no fonts at all.");
212 }
213 fontConfigFailed = true;
214 return;
215 } else if (fontConfigFailed) {
216 for (int i = 0; i< fontArr.length; i++) {
217 if (fontArr[i].firstFont == null) {
218 fontArr[i].firstFont = anyFont;
219 }
220 }
221 }
222
223 fontConfigFonts = fontArr;
224
225 if (FontUtilities.isLogging()) {
226
227 PlatformLogger logger = FontUtilities.getLogger();
228
229 long t1 = System.nanoTime();
230 logger.info("Time spent accessing fontconfig="
231 + ((t1 - t0) / 1000000) + "ms.");
232
233 for (int i = 0; i< fontConfigFonts.length; i++) {
234 FcCompFont fci = fontConfigFonts[i];
235 logger.info("FC font " + fci.fcName+" maps to family " +
236 fci.firstFont.familyName +
237 " in file " + fci.firstFont.fontFile);
238 if (fci.allFonts != null) {
239 for (int f=0;f<fci.allFonts.length;f++) {
240 FontConfigFont fcf = fci.allFonts[f];
241 logger.info("Family=" + fcf.familyName +
242 " Style="+ fcf.styleStr +
243 " Fullname="+fcf.fullName +
244 " File="+fcf.fontFile);
245 }
246 }
247 }
248 }
249 }
250
251 public PhysicalFont registerFromFcInfo(FcCompFont fcInfo) {
252
253 SunFontManager fm = SunFontManager.getInstance();
254
255 /* If it's a TTC file we need to know that as we will need to
256 * make sure we return the right font */
257 String fontFile = fcInfo.firstFont.fontFile;
258 int offset = fontFile.length()-4;
259 if (offset <= 0) {
260 return null;
261 }
262 String ext = fontFile.substring(offset).toLowerCase();
263 boolean isTTC = ext.equals(".ttc");
264
265 /* If this file is already registered, can just return its font.
266 * However we do need to check in case it's a TTC as we need
267 * a specific font, so rather than directly returning it, let
268 * findFont2D resolve that.
269 */
270 PhysicalFont physFont = fm.getRegisteredFontFile(fontFile);
271 if (physFont != null) {
272 if (isTTC) {
273 Font2D f2d = fm.findFont2D(fcInfo.firstFont.familyName,
274 fcInfo.style,
275 FontManager.NO_FALLBACK);
276 if (f2d instanceof PhysicalFont) { /* paranoia */
277 return (PhysicalFont)f2d;
278 } else {
279 return null;
280 }
281 } else {
282 return physFont;
283 }
284 }
285
286 /* If the font may hide a JRE font, we want to use the JRE version,
287 * so make it point to the JRE font.
288 */
289 physFont = fm.findJREDeferredFont(fcInfo.firstFont.familyName,
290 fcInfo.style);
291
292 /* It is also possible the font file is on the "deferred" list,
293 * in which case we can just initialise it now.
294 */
295 if (physFont == null &&
296 fm.isDeferredFont(fontFile) == true) {
297 physFont = fm.initialiseDeferredFont(fcInfo.firstFont.fontFile);
298 /* use findFont2D to get the right font from TTC's */
299 if (physFont != null) {
300 if (isTTC) {
301 Font2D f2d = fm.findFont2D(fcInfo.firstFont.familyName,
302 fcInfo.style,
303 FontManager.NO_FALLBACK);
304 if (f2d instanceof PhysicalFont) { /* paranoia */
305 return (PhysicalFont)f2d;
306 } else {
307 return null;
308 }
309 } else {
310 return physFont;
311 }
312 }
313 }
314
315 /* In the majority of cases we reach here, and need to determine
316 * the type and rank to register the font.
317 */
318 if (physFont == null) {
319 int fontFormat = SunFontManager.FONTFORMAT_NONE;
320 int fontRank = Font2D.UNKNOWN_RANK;
321
322 if (ext.equals(".ttf") || isTTC) {
323 fontFormat = SunFontManager.FONTFORMAT_TRUETYPE;
324 fontRank = Font2D.TTF_RANK;
325 } else if (ext.equals(".pfa") || ext.equals(".pfb")) {
326 fontFormat = SunFontManager.FONTFORMAT_TYPE1;
327 fontRank = Font2D.TYPE1_RANK;
328 }
329 physFont = fm.registerFontFile(fcInfo.firstFont.fontFile, null,
330 fontFormat, true, fontRank);
331 }
332 return physFont;
333 }
334
335 /*
336 * We need to return a Composite font which has as the font in
337 * its first slot one obtained from fontconfig.
338 */
339 public CompositeFont getFontConfigFont(String name, int style) {
340
341 name = name.toLowerCase();
342
343 initFontConfigFonts(false);
344 if (fontConfigFonts == null) {
345 // This avoids an immediate NPE if fontconfig look up failed
346 // but doesn't guarantee this is a recoverable situation.
347 return null;
348 }
349
350 FcCompFont fcInfo = null;
351 for (int i=0; i<fontConfigFonts.length; i++) {
352 if (name.equals(fontConfigFonts[i].fcFamily) &&
353 style == fontConfigFonts[i].style) {
354 fcInfo = fontConfigFonts[i];
355 break;
356 }
357 }
358 if (fcInfo == null) {
359 fcInfo = fontConfigFonts[0];
360 }
361
362 if (FontUtilities.isLogging()) {
363 FontUtilities.getLogger()
364 .info("FC name=" + name + " style=" + style +
365 " uses " + fcInfo.firstFont.familyName +
366 " in file: " + fcInfo.firstFont.fontFile);
367 }
368
369 if (fcInfo.compFont != null) {
370 return fcInfo.compFont;
371 }
372
373 /* jdkFont is going to be used for slots 1..N and as a fallback.
374 * Slot 0 will be the physical font from fontconfig.
375 */
376 FontManager fm = FontManagerFactory.getInstance();
377 CompositeFont jdkFont = (CompositeFont)
378 fm.findFont2D(fcInfo.jdkName, style, FontManager.LOGICAL_FALLBACK);
379
380 if (fcInfo.firstFont.familyName == null ||
381 fcInfo.firstFont.fontFile == null) {
382 return (fcInfo.compFont = jdkFont);
383 }
384
385 /* First, see if the family and exact style is already registered.
386 * If it is, use it. If it's not, then try to register it.
387 * If that registration fails (signalled by null) just return the
388 * regular JDK composite.
389 * Algorithmically styled fonts won't match on exact style, so
390 * will fall through this code, but the regisration code will
391 * find that file already registered and return its font.
392 */
393 FontFamily family = FontFamily.getFamily(fcInfo.firstFont.familyName);
394 PhysicalFont physFont = null;
395 if (family != null) {
396 Font2D f2D = family.getFontWithExactStyleMatch(fcInfo.style);
397 if (f2D instanceof PhysicalFont) {
398 physFont = (PhysicalFont)f2D;
399 }
400 }
401
402 if (physFont == null ||
403 !fcInfo.firstFont.fontFile.equals(physFont.platName)) {
404 physFont = registerFromFcInfo(fcInfo);
405 if (physFont == null) {
406 return (fcInfo.compFont = jdkFont);
407 }
408 family = FontFamily.getFamily(physFont.getFamilyName(null));
409 }
410
411 /* Now register the fonts in the family (the other styles) after
412 * checking that they aren't already registered and are actually in
413 * a different file. They may be the same file in CJK cases.
414 * For cases where they are different font files - eg as is common for
415 * Latin fonts, then we rely on fontconfig to report these correctly.
416 * Assume that all styles of this font are found by fontconfig,
417 * so we can find all the family members which must be registered
418 * together to prevent synthetic styling.
419 */
420 for (int i=0; i<fontConfigFonts.length; i++) {
421 FcCompFont fc = fontConfigFonts[i];
422 if (fc != fcInfo &&
423 physFont.getFamilyName(null).equals(fc.firstFont.familyName) &&
424 !fc.firstFont.fontFile.equals(physFont.platName) &&
425 family.getFontWithExactStyleMatch(fc.style) == null) {
426
427 registerFromFcInfo(fontConfigFonts[i]);
428 }
429 }
430
431 /* Now we have a physical font. We will back this up with the JDK
432 * logical font (sansserif, serif, or monospaced) that corresponds
433 * to the Pango/GTK/FC logical font name.
434 */
435 return (fcInfo.compFont = new CompositeFont(physFont, jdkFont));
436 }
437
438 public FcCompFont[] getFontConfigFonts() {
439 return fontConfigFonts;
440 }
441
442 /* Return an array of FcCompFont structs describing the primary
443 * font located for each of fontconfig/GTK/Pango's logical font names.
444 */
445 private static native void getFontConfig(String locale,
446 FontConfigInfo fcInfo,
447 FcCompFont[] fonts,
448 boolean includeFallbacks);
449
450 void populateFontConfig(FcCompFont[] fcInfo) {
451 fontConfigFonts = fcInfo;
452 }
453
454 FcCompFont[] loadFontConfig() {
455 initFontConfigFonts(true);
456 return fontConfigFonts;
457 }
458
459 FontConfigInfo getFontConfigInfo() {
460 initFontConfigFonts(true);
461 return fcInfo;
462 }
463
464 private static native int
465 getFontConfigAASettings(String locale, String fcFamily);
466 }