1 /*
2 * Copyright (c) 2015, 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 #include "hb.h"
27 #include "hb-jdk.h"
28 #ifdef MACOSX
29 #include "hb-coretext.h"
30 #endif
31 #include <stdlib.h>
32
33 #if defined(__GNUC__) && __GNUC__ >= 4
34 #define HB_UNUSED __attribute__((unused))
35 #else
36 #define HB_UNUSED
37 #endif
38
39 static hb_bool_t
40 hb_jdk_get_glyph (hb_font_t *font HB_UNUSED,
41 void *font_data,
42 hb_codepoint_t unicode,
43 hb_codepoint_t variation_selector,
44 hb_codepoint_t *glyph,
45 void *user_data HB_UNUSED)
46 {
47
48 JDKFontInfo *jdkFontInfo = (JDKFontInfo*)font_data;
49 JNIEnv* env = jdkFontInfo->env;
50 jobject font2D = jdkFontInfo->font2D;
51 hb_codepoint_t u = (variation_selector==0) ? unicode : variation_selector;
52
53 *glyph = (hb_codepoint_t)
54 env->CallIntMethod(font2D, sunFontIDs.f2dCharToGlyphMID, u);
55 if ((int)*glyph < 0) {
56 *glyph = 0;
57 }
58 return (*glyph != 0);
59 }
60
61 static hb_position_t
62 hb_jdk_get_glyph_h_advance (hb_font_t *font HB_UNUSED,
63 void *font_data,
64 hb_codepoint_t glyph,
65 void *user_data HB_UNUSED)
66 {
67
68 float fadv = 0.0f;
69 if ((glyph & 0xfffe) == 0xfffe) {
70 return 0; // JDK uses this glyph code.
71 }
72
73 JDKFontInfo *jdkFontInfo = (JDKFontInfo*)font_data;
74 JNIEnv* env = jdkFontInfo->env;
75 jobject fontStrike = jdkFontInfo->fontStrike;
76 jobject pt = env->CallObjectMethod(fontStrike,
77 sunFontIDs.getGlyphMetricsMID, glyph);
78
79 if (pt == NULL) {
80 return 0;
81 }
82 fadv = env->GetFloatField(pt, sunFontIDs.xFID);
83 fadv *= jdkFontInfo->devScale;
84 env->DeleteLocalRef(pt);
85
86 return HBFloatToFixed(fadv);
87 }
88
89 static hb_position_t
90 hb_jdk_get_glyph_v_advance (hb_font_t *font HB_UNUSED,
91 void *font_data,
92 hb_codepoint_t glyph,
93 void *user_data HB_UNUSED)
94 {
95
96 float fadv = 0.0f;
97 if ((glyph & 0xfffe) == 0xfffe) {
98 return 0; // JDK uses this glyph code.
99 }
100
101 JDKFontInfo *jdkFontInfo = (JDKFontInfo*)font_data;
102 JNIEnv* env = jdkFontInfo->env;
103 jobject fontStrike = jdkFontInfo->fontStrike;
104 jobject pt = env->CallObjectMethod(fontStrike,
105 sunFontIDs.getGlyphMetricsMID, glyph);
106
107 if (pt == NULL) {
108 return 0;
109 }
110 fadv = env->GetFloatField(pt, sunFontIDs.yFID);
111 env->DeleteLocalRef(pt);
112
113 return HBFloatToFixed(fadv);
114
115 }
116
117 static hb_bool_t
118 hb_jdk_get_glyph_h_origin (hb_font_t *font HB_UNUSED,
119 void *font_data HB_UNUSED,
120 hb_codepoint_t glyph HB_UNUSED,
121 hb_position_t *x HB_UNUSED,
122 hb_position_t *y HB_UNUSED,
123 void *user_data HB_UNUSED)
124 {
125 /* We always work in the horizontal coordinates. */
126 return true;
127 }
128
129 static hb_bool_t
130 hb_jdk_get_glyph_v_origin (hb_font_t *font HB_UNUSED,
131 void *font_data,
132 hb_codepoint_t glyph,
133 hb_position_t *x,
134 hb_position_t *y,
135 void *user_data HB_UNUSED)
136 {
137 return false;
138 }
139
140 static hb_position_t
141 hb_jdk_get_glyph_h_kerning (hb_font_t *font,
142 void *font_data,
143 hb_codepoint_t lejdk_glyph,
144 hb_codepoint_t right_glyph,
145 void *user_data HB_UNUSED)
146 {
147 /* Not implemented. This seems to be in the HB API
148 * as a way to fall back to Freetype's kerning support
149 * which could be based on some on-the fly glyph analysis.
150 * But more likely it reads the kern table. That is easy
151 * enough code to add if we find a need to fall back
152 * to that instead of using gpos. It seems like if
153 * there is a gpos table at all, the practice is to
154 * use that and ignore kern, no matter that gpos does
155 * not implement the kern feature.
156 */
157 return 0;
158 }
159
160 static hb_position_t
161 hb_jdk_get_glyph_v_kerning (hb_font_t *font HB_UNUSED,
162 void *font_data HB_UNUSED,
163 hb_codepoint_t top_glyph HB_UNUSED,
164 hb_codepoint_t bottom_glyph HB_UNUSED,
165 void *user_data HB_UNUSED)
166 {
167 /* OpenType doesn't have vertical-kerning other than GPOS. */
168 return 0;
169 }
170
171 static hb_bool_t
172 hb_jdk_get_glyph_extents (hb_font_t *font HB_UNUSED,
173 void *font_data,
174 hb_codepoint_t glyph,
175 hb_glyph_extents_t *extents,
176 void *user_data HB_UNUSED)
177 {
178 /* TODO */
179 return false;
180 }
181
182 static hb_bool_t
183 hb_jdk_get_glyph_contour_point (hb_font_t *font HB_UNUSED,
184 void *font_data,
185 hb_codepoint_t glyph,
186 unsigned int point_index,
187 hb_position_t *x,
188 hb_position_t *y,
189 void *user_data HB_UNUSED)
190 {
191 if ((glyph & 0xfffe) == 0xfffe) {
192 *x = 0; *y = 0;
193 return true;
194 }
195
196 JDKFontInfo *jdkFontInfo = (JDKFontInfo*)font_data;
197 JNIEnv* env = jdkFontInfo->env;
198 jobject fontStrike = jdkFontInfo->fontStrike;
199 jobject pt = env->CallObjectMethod(fontStrike,
200 sunFontIDs.getGlyphPointMID,
201 glyph, point_index);
202
203 if (pt == NULL) {
204 *x = 0; *y = 0;
205 return true;
206 }
207 *x = HBFloatToFixed(env->GetFloatField(pt, sunFontIDs.xFID));
208 *y = HBFloatToFixed(env->GetFloatField(pt, sunFontIDs.yFID));
209 env->DeleteLocalRef(pt);
210
211 return true;
212 }
213
214 static hb_bool_t
215 hb_jdk_get_glyph_name (hb_font_t *font HB_UNUSED,
216 void *font_data,
217 hb_codepoint_t glyph,
218 char *name, unsigned int size,
219 void *user_data HB_UNUSED)
220 {
221 return false;
222 }
223
224 static hb_bool_t
225 hb_jdk_get_glyph_from_name (hb_font_t *font HB_UNUSED,
226 void *font_data,
227 const char *name, int len,
228 hb_codepoint_t *glyph,
229 void *user_data HB_UNUSED)
230 {
231 return false;
232 }
233
234 // remind : can we initialise this from the code we call
235 // from the class static method in Java to make it
236 // completely thread safe.
237 static hb_font_funcs_t *
238 _hb_jdk_get_font_funcs (void)
239 {
240 static hb_font_funcs_t *jdk_ffuncs = NULL;
241 hb_font_funcs_t *ff;
242
243 if (!jdk_ffuncs) {
244 ff = hb_font_funcs_create();
245
246 hb_font_funcs_set_glyph_func(ff, hb_jdk_get_glyph, NULL, NULL);
247 hb_font_funcs_set_glyph_h_advance_func(ff,
248 hb_jdk_get_glyph_h_advance, NULL, NULL);
249 hb_font_funcs_set_glyph_v_advance_func(ff,
250 hb_jdk_get_glyph_v_advance, NULL, NULL);
251 hb_font_funcs_set_glyph_h_origin_func(ff,
252 hb_jdk_get_glyph_h_origin, NULL, NULL);
253 hb_font_funcs_set_glyph_v_origin_func(ff,
254 hb_jdk_get_glyph_v_origin, NULL, NULL);
255 hb_font_funcs_set_glyph_h_kerning_func(ff,
256 hb_jdk_get_glyph_h_kerning, NULL, NULL);
257 hb_font_funcs_set_glyph_v_kerning_func(ff,
258 hb_jdk_get_glyph_v_kerning, NULL, NULL);
259 hb_font_funcs_set_glyph_extents_func(ff,
260 hb_jdk_get_glyph_extents, NULL, NULL);
261 hb_font_funcs_set_glyph_contour_point_func(ff,
262 hb_jdk_get_glyph_contour_point, NULL, NULL);
263 hb_font_funcs_set_glyph_name_func(ff,
264 hb_jdk_get_glyph_name, NULL, NULL);
265 hb_font_funcs_set_glyph_from_name_func(ff,
266 hb_jdk_get_glyph_from_name, NULL, NULL);
267 hb_font_funcs_make_immutable(ff); // done setting functions.
268 jdk_ffuncs = ff;
269 }
270 return jdk_ffuncs;
271 }
272
273 static void _do_nothing(void) {
274 }
275
276 static void _free_nothing(void*) {
277 }
278
279 static hb_blob_t *
280 reference_table(hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data) {
281
282 JDKFontInfo *jdkFontInfo = (JDKFontInfo*)user_data;
283 JNIEnv* env = jdkFontInfo->env;
284 jobject font2D = jdkFontInfo->font2D;
285 jsize length = 0;
286 void* buffer = NULL;
287 int cacheIdx = 0;
288
289 // HB_TAG_NONE is 0 and is used to get the whole font file.
290 // It is not expected to be needed for JDK.
291 if (tag == 0 || jdkFontInfo->layoutTables == NULL) {
292 return NULL;
293 }
294
295 for (cacheIdx=0; cacheIdx<LAYOUTCACHE_ENTRIES; cacheIdx++) {
296 if (tag == jdkFontInfo->layoutTables->entries[cacheIdx].tag) break;
297 }
298
299 if (cacheIdx < LAYOUTCACHE_ENTRIES) { // if found
300 if (jdkFontInfo->layoutTables->entries[cacheIdx].len != -1) {
301 length = jdkFontInfo->layoutTables->entries[cacheIdx].len;
302 buffer = (void*)jdkFontInfo->layoutTables->entries[cacheIdx].ptr;
303 }
304 }
305
306 if (buffer == NULL) {
307 jbyteArray tableBytes = (jbyteArray)
308 env->CallObjectMethod(font2D, sunFontIDs.getTableBytesMID, tag);
309 if (tableBytes == NULL) {
310 return NULL;
311 }
312 length = env->GetArrayLength(tableBytes);
313 buffer = calloc(length, sizeof(jbyte));
314 env->GetByteArrayRegion(tableBytes, 0, length, (jbyte*)buffer);
315
316 if (cacheIdx >= LAYOUTCACHE_ENTRIES) { // not a cacheable table
317 return hb_blob_create((const char *)buffer, length,
318 HB_MEMORY_MODE_WRITABLE,
319 buffer, free);
320 } else {
321 jdkFontInfo->layoutTables->entries[cacheIdx].len = length;
322 jdkFontInfo->layoutTables->entries[cacheIdx].ptr = buffer;
323 }
324 }
325
326 return hb_blob_create((const char *)buffer, length,
327 HB_MEMORY_MODE_READONLY,
328 NULL, _free_nothing);
329 }
330
331
332
333 hb_face_t*
334 hb_jdk_face_create(JDKFontInfo *jdkFontInfo,
335 hb_destroy_func_t destroy) {
336
337 hb_face_t *face =
338 hb_face_create_for_tables(reference_table, jdkFontInfo, destroy);
339
340 return face;
341 }
342
343 static hb_font_t* _hb_jdk_font_create(JDKFontInfo *jdkFontInfo,
344 hb_destroy_func_t destroy) {
345
346 hb_font_t *font;
347 hb_face_t *face;
348
349 face = hb_jdk_face_create(jdkFontInfo, destroy);
350 font = hb_font_create(face);
351 hb_face_destroy (face);
352 hb_font_set_funcs (font,
353 _hb_jdk_get_font_funcs (),
354 jdkFontInfo, (hb_destroy_func_t) _do_nothing);
355 hb_font_set_scale (font,
356 HBFloatToFixed(jdkFontInfo->ptSize*jdkFontInfo->devScale),
357 HBFloatToFixed(jdkFontInfo->ptSize*jdkFontInfo->devScale));
358 return font;
359 }
360
361 #ifdef MACOSX
362 static hb_font_t* _hb_jdk_ct_font_create(JDKFontInfo *jdkFontInfo) {
363
364 hb_font_t *font = NULL;
365 hb_face_t *face = NULL;
366 if (jdkFontInfo->nativeFont == 0) {
367 return NULL;
368 }
369 face = hb_coretext_face_create((CGFontRef)(jdkFontInfo->nativeFont));
370 font = hb_font_create(face);
371 hb_face_destroy(face);
372
373 hb_font_set_scale(font,
374 HBFloatToFixed(jdkFontInfo->ptSize),
375 HBFloatToFixed(jdkFontInfo->ptSize));
376 return font;
377 }
378 #endif
379
380 hb_font_t* hb_jdk_font_create(JDKFontInfo *jdkFontInfo,
381 hb_destroy_func_t destroy) {
382
383 hb_font_t* font = NULL;
384
385 #ifdef MACOSX
386 if (jdkFontInfo->aat) {
387 font = _hb_jdk_ct_font_create(jdkFontInfo);
388 }
389 #endif
390 if (font == NULL) {
391 font = _hb_jdk_font_create(jdkFontInfo, destroy);
392 }
393 return font;
394 }