1 /* libs/android_runtime/android/graphics/Paint.cpp 2 ** 3 ** Copyright 2006, The Android Open Source Project 4 ** 5 ** Licensed under the Apache License, Version 2.0 (the "License"); 6 ** you may not use this file except in compliance with the License. 7 ** You may obtain a copy of the License at 8 ** 9 ** http://www.apache.org/licenses/LICENSE-2.0 10 ** 11 ** Unless required by applicable law or agreed to in writing, software 12 ** distributed under the License is distributed on an "AS IS" BASIS, 13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 ** See the License for the specific language governing permissions and 15 ** limitations under the License. 16 */ 17 18 #define LOG_TAG "Paint" 19 20 #include <utils/Log.h> 21 22 #include "jni.h" 23 #include "GraphicsJNI.h" 24 #include <android_runtime/AndroidRuntime.h> 25 #include <ScopedUtfChars.h> 26 27 #include "SkBlurDrawLooper.h" 28 #include "SkColorFilter.h" 29 #include "SkMaskFilter.h" 30 #include "SkRasterizer.h" 31 #include "SkShader.h" 32 #include "SkTypeface.h" 33 #include "SkXfermode.h" 34 #include "unicode/uloc.h" 35 #include "unicode/ushape.h" 36 #include "TextLayout.h" 37 38 // temporary for debugging 39 #include <Caches.h> 40 #include <utils/Log.h> 41 42 namespace android { 43 44 struct JMetricsID { 45 jfieldID top; 46 jfieldID ascent; 47 jfieldID descent; 48 jfieldID bottom; 49 jfieldID leading; 50 }; 51 52 static jclass gFontMetrics_class; 53 static JMetricsID gFontMetrics_fieldID; 54 55 static jclass gFontMetricsInt_class; 56 static JMetricsID gFontMetricsInt_fieldID; 57 58 static void defaultSettingsForAndroid(SkPaint* paint) { 59 // GlyphID encoding is required because we are using Harfbuzz shaping 60 paint->setTextEncoding(SkPaint::kGlyphID_TextEncoding); 61 62 SkPaintOptionsAndroid paintOpts = paint->getPaintOptionsAndroid(); 63 paintOpts.setUseFontFallbacks(true); 64 paint->setPaintOptionsAndroid(paintOpts); 65 } 66 67 class SkPaintGlue { 68 public: 69 enum MoveOpt { 70 AFTER, AT_OR_AFTER, BEFORE, AT_OR_BEFORE, AT 71 }; 72 73 static void finalizer(JNIEnv* env, jobject clazz, SkPaint* obj) { 74 delete obj; 75 } 76 77 static SkPaint* init(JNIEnv* env, jobject clazz) { 78 SkPaint* obj = new SkPaint(); 79 defaultSettingsForAndroid(obj); 80 return obj; 81 } 82 83 static SkPaint* intiWithPaint(JNIEnv* env, jobject clazz, SkPaint* paint) { 84 SkPaint* obj = new SkPaint(*paint); 85 return obj; 86 } 87 88 static void reset(JNIEnv* env, jobject clazz, SkPaint* obj) { 89 obj->reset(); 90 defaultSettingsForAndroid(obj); 91 } 92 93 static void assign(JNIEnv* env, jobject clazz, SkPaint* dst, const SkPaint* src) { 94 *dst = *src; 95 } 96 97 static jint getFlags(JNIEnv* env, jobject paint) { 98 NPE_CHECK_RETURN_ZERO(env, paint); 99 return GraphicsJNI::getNativePaint(env, paint)->getFlags(); 100 } 101 102 static void setFlags(JNIEnv* env, jobject paint, jint flags) { 103 NPE_CHECK_RETURN_VOID(env, paint); 104 GraphicsJNI::getNativePaint(env, paint)->setFlags(flags); 105 } 106 107 static jint getHinting(JNIEnv* env, jobject paint) { 108 NPE_CHECK_RETURN_ZERO(env, paint); 109 return GraphicsJNI::getNativePaint(env, paint)->getHinting() 110 == SkPaint::kNo_Hinting ? 0 : 1; 111 } 112 113 static void setHinting(JNIEnv* env, jobject paint, jint mode) { 114 NPE_CHECK_RETURN_VOID(env, paint); 115 GraphicsJNI::getNativePaint(env, paint)->setHinting( 116 mode == 0 ? SkPaint::kNo_Hinting : SkPaint::kNormal_Hinting); 117 } 118 119 static void setAntiAlias(JNIEnv* env, jobject paint, jboolean aa) { 120 NPE_CHECK_RETURN_VOID(env, paint); 121 GraphicsJNI::getNativePaint(env, paint)->setAntiAlias(aa); 122 } 123 124 static void setLinearText(JNIEnv* env, jobject paint, jboolean linearText) { 125 NPE_CHECK_RETURN_VOID(env, paint); 126 GraphicsJNI::getNativePaint(env, paint)->setLinearText(linearText); 127 } 128 129 static void setSubpixelText(JNIEnv* env, jobject paint, jboolean subpixelText) { 130 NPE_CHECK_RETURN_VOID(env, paint); 131 GraphicsJNI::getNativePaint(env, paint)->setSubpixelText(subpixelText); 132 } 133 134 static void setUnderlineText(JNIEnv* env, jobject paint, jboolean underlineText) { 135 NPE_CHECK_RETURN_VOID(env, paint); 136 GraphicsJNI::getNativePaint(env, paint)->setUnderlineText(underlineText); 137 } 138 139 static void setStrikeThruText(JNIEnv* env, jobject paint, jboolean strikeThruText) { 140 NPE_CHECK_RETURN_VOID(env, paint); 141 GraphicsJNI::getNativePaint(env, paint)->setStrikeThruText(strikeThruText); 142 } 143 144 static void setFakeBoldText(JNIEnv* env, jobject paint, jboolean fakeBoldText) { 145 NPE_CHECK_RETURN_VOID(env, paint); 146 GraphicsJNI::getNativePaint(env, paint)->setFakeBoldText(fakeBoldText); 147 } 148 149 static void setFilterBitmap(JNIEnv* env, jobject paint, jboolean filterBitmap) { 150 NPE_CHECK_RETURN_VOID(env, paint); 151 GraphicsJNI::getNativePaint(env, paint)->setFilterLevel( 152 filterBitmap ? SkPaint::kLow_FilterLevel : SkPaint::kNone_FilterLevel); 153 } 154 155 static void setDither(JNIEnv* env, jobject paint, jboolean dither) { 156 NPE_CHECK_RETURN_VOID(env, paint); 157 GraphicsJNI::getNativePaint(env, paint)->setDither(dither); 158 } 159 160 static jint getStyle(JNIEnv* env, jobject clazz, SkPaint* obj) { 161 return obj->getStyle(); 162 } 163 164 static void setStyle(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Style style) { 165 obj->setStyle(style); 166 } 167 168 static jint getColor(JNIEnv* env, jobject paint) { 169 NPE_CHECK_RETURN_ZERO(env, paint); 170 return GraphicsJNI::getNativePaint(env, paint)->getColor(); 171 } 172 173 static jint getAlpha(JNIEnv* env, jobject paint) { 174 NPE_CHECK_RETURN_ZERO(env, paint); 175 return GraphicsJNI::getNativePaint(env, paint)->getAlpha(); 176 } 177 178 static void setColor(JNIEnv* env, jobject paint, jint color) { 179 NPE_CHECK_RETURN_VOID(env, paint); 180 GraphicsJNI::getNativePaint(env, paint)->setColor(color); 181 } 182 183 static void setAlpha(JNIEnv* env, jobject paint, jint a) { 184 NPE_CHECK_RETURN_VOID(env, paint); 185 GraphicsJNI::getNativePaint(env, paint)->setAlpha(a); 186 } 187 188 static jfloat getStrokeWidth(JNIEnv* env, jobject paint) { 189 NPE_CHECK_RETURN_ZERO(env, paint); 190 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeWidth()); 191 } 192 193 static void setStrokeWidth(JNIEnv* env, jobject paint, jfloat width) { 194 NPE_CHECK_RETURN_VOID(env, paint); 195 GraphicsJNI::getNativePaint(env, paint)->setStrokeWidth(SkFloatToScalar(width)); 196 } 197 198 static jfloat getStrokeMiter(JNIEnv* env, jobject paint) { 199 NPE_CHECK_RETURN_ZERO(env, paint); 200 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeMiter()); 201 } 202 203 static void setStrokeMiter(JNIEnv* env, jobject paint, jfloat miter) { 204 NPE_CHECK_RETURN_VOID(env, paint); 205 GraphicsJNI::getNativePaint(env, paint)->setStrokeMiter(SkFloatToScalar(miter)); 206 } 207 208 static jint getStrokeCap(JNIEnv* env, jobject clazz, SkPaint* obj) { 209 return obj->getStrokeCap(); 210 } 211 212 static void setStrokeCap(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Cap cap) { 213 obj->setStrokeCap(cap); 214 } 215 216 static jint getStrokeJoin(JNIEnv* env, jobject clazz, SkPaint* obj) { 217 return obj->getStrokeJoin(); 218 } 219 220 static void setStrokeJoin(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Join join) { 221 obj->setStrokeJoin(join); 222 } 223 224 static jboolean getFillPath(JNIEnv* env, jobject clazz, SkPaint* obj, SkPath* src, SkPath* dst) { 225 return obj->getFillPath(*src, dst); 226 } 227 228 static SkShader* setShader(JNIEnv* env, jobject clazz, SkPaint* obj, SkShader* shader) { 229 return obj->setShader(shader); 230 } 231 232 static SkColorFilter* setColorFilter(JNIEnv* env, jobject clazz, SkPaint* obj, SkColorFilter* filter) { 233 return obj->setColorFilter(filter); 234 } 235 236 static SkXfermode* setXfermode(JNIEnv* env, jobject clazz, SkPaint* obj, SkXfermode* xfermode) { 237 return obj->setXfermode(xfermode); 238 } 239 240 static SkPathEffect* setPathEffect(JNIEnv* env, jobject clazz, SkPaint* obj, SkPathEffect* effect) { 241 return obj->setPathEffect(effect); 242 } 243 244 static SkMaskFilter* setMaskFilter(JNIEnv* env, jobject clazz, SkPaint* obj, SkMaskFilter* maskfilter) { 245 return obj->setMaskFilter(maskfilter); 246 } 247 248 static SkTypeface* setTypeface(JNIEnv* env, jobject clazz, SkPaint* obj, SkTypeface* typeface) { 249 return obj->setTypeface(typeface); 250 } 251 252 static SkRasterizer* setRasterizer(JNIEnv* env, jobject clazz, SkPaint* obj, SkRasterizer* rasterizer) { 253 return obj->setRasterizer(rasterizer); 254 } 255 256 static jint getTextAlign(JNIEnv* env, jobject clazz, SkPaint* obj) { 257 return obj->getTextAlign(); 258 } 259 260 static void setTextAlign(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Align align) { 261 obj->setTextAlign(align); 262 } 263 264 // generate bcp47 identifier for the supplied locale 265 static void toLanguageTag(char* output, size_t outSize, 266 const char* locale) { 267 if (output == NULL || outSize <= 0) { 268 return; 269 } 270 if (locale == NULL) { 271 output[0] = '\0'; 272 return; 273 } 274 char canonicalChars[ULOC_FULLNAME_CAPACITY]; 275 UErrorCode uErr = U_ZERO_ERROR; 276 uloc_canonicalize(locale, canonicalChars, ULOC_FULLNAME_CAPACITY, 277 &uErr); 278 if (U_SUCCESS(uErr)) { 279 char likelyChars[ULOC_FULLNAME_CAPACITY]; 280 uErr = U_ZERO_ERROR; 281 uloc_addLikelySubtags(canonicalChars, likelyChars, 282 ULOC_FULLNAME_CAPACITY, &uErr); 283 if (U_SUCCESS(uErr)) { 284 uErr = U_ZERO_ERROR; 285 uloc_toLanguageTag(likelyChars, output, outSize, FALSE, &uErr); 286 if (U_SUCCESS(uErr)) { 287 return; 288 } else { 289 ALOGD("uloc_toLanguageTag(\"%s\") failed: %s", likelyChars, 290 u_errorName(uErr)); 291 } 292 } else { 293 ALOGD("uloc_addLikelySubtags(\"%s\") failed: %s", 294 canonicalChars, u_errorName(uErr)); 295 } 296 } else { 297 ALOGD("uloc_canonicalize(\"%s\") failed: %s", locale, 298 u_errorName(uErr)); 299 } 300 // unable to build a proper language identifier 301 output[0] = '\0'; 302 } 303 304 static void setTextLocale(JNIEnv* env, jobject clazz, SkPaint* obj, jstring locale) { 305 ScopedUtfChars localeChars(env, locale); 306 char langTag[ULOC_FULLNAME_CAPACITY]; 307 toLanguageTag(langTag, ULOC_FULLNAME_CAPACITY, localeChars.c_str()); 308 309 SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid(); 310 paintOpts.setLanguage(langTag); 311 obj->setPaintOptionsAndroid(paintOpts); 312 } 313 314 static jfloat getTextSize(JNIEnv* env, jobject paint) { 315 NPE_CHECK_RETURN_ZERO(env, paint); 316 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSize()); 317 } 318 319 static void setTextSize(JNIEnv* env, jobject paint, jfloat textSize) { 320 NPE_CHECK_RETURN_VOID(env, paint); 321 GraphicsJNI::getNativePaint(env, paint)->setTextSize(SkFloatToScalar(textSize)); 322 } 323 324 static jfloat getTextScaleX(JNIEnv* env, jobject paint) { 325 NPE_CHECK_RETURN_ZERO(env, paint); 326 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextScaleX()); 327 } 328 329 static void setTextScaleX(JNIEnv* env, jobject paint, jfloat scaleX) { 330 NPE_CHECK_RETURN_VOID(env, paint); 331 GraphicsJNI::getNativePaint(env, paint)->setTextScaleX(SkFloatToScalar(scaleX)); 332 } 333 334 static jfloat getTextSkewX(JNIEnv* env, jobject paint) { 335 NPE_CHECK_RETURN_ZERO(env, paint); 336 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSkewX()); 337 } 338 339 static void setTextSkewX(JNIEnv* env, jobject paint, jfloat skewX) { 340 NPE_CHECK_RETURN_VOID(env, paint); 341 GraphicsJNI::getNativePaint(env, paint)->setTextSkewX(SkFloatToScalar(skewX)); 342 } 343 344 static jfloat ascent(JNIEnv* env, jobject paint) { 345 NPE_CHECK_RETURN_ZERO(env, paint); 346 SkPaint::FontMetrics metrics; 347 (void)GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 348 return SkScalarToFloat(metrics.fAscent); 349 } 350 351 static jfloat descent(JNIEnv* env, jobject paint) { 352 NPE_CHECK_RETURN_ZERO(env, paint); 353 SkPaint::FontMetrics metrics; 354 (void)GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 355 return SkScalarToFloat(metrics.fDescent); 356 } 357 358 static jfloat getFontMetrics(JNIEnv* env, jobject paint, jobject metricsObj) { 359 NPE_CHECK_RETURN_ZERO(env, paint); 360 SkPaint::FontMetrics metrics; 361 SkScalar spacing = GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 362 363 if (metricsObj) { 364 SkASSERT(env->IsInstanceOf(metricsObj, gFontMetrics_class)); 365 env->SetFloatField(metricsObj, gFontMetrics_fieldID.top, SkScalarToFloat(metrics.fTop)); 366 env->SetFloatField(metricsObj, gFontMetrics_fieldID.ascent, SkScalarToFloat(metrics.fAscent)); 367 env->SetFloatField(metricsObj, gFontMetrics_fieldID.descent, SkScalarToFloat(metrics.fDescent)); 368 env->SetFloatField(metricsObj, gFontMetrics_fieldID.bottom, SkScalarToFloat(metrics.fBottom)); 369 env->SetFloatField(metricsObj, gFontMetrics_fieldID.leading, SkScalarToFloat(metrics.fLeading)); 370 } 371 return SkScalarToFloat(spacing); 372 } 373 374 static jint getFontMetricsInt(JNIEnv* env, jobject paint, jobject metricsObj) { 375 NPE_CHECK_RETURN_ZERO(env, paint); 376 SkPaint::FontMetrics metrics; 377 378 GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 379 int ascent = SkScalarRound(metrics.fAscent); 380 int descent = SkScalarRound(metrics.fDescent); 381 int leading = SkScalarRound(metrics.fLeading); 382 383 if (metricsObj) { 384 SkASSERT(env->IsInstanceOf(metricsObj, gFontMetricsInt_class)); 385 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.top, SkScalarFloor(metrics.fTop)); 386 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.ascent, ascent); 387 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.descent, descent); 388 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.bottom, SkScalarCeil(metrics.fBottom)); 389 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.leading, leading); 390 } 391 return descent - ascent + leading; 392 } 393 394 static jfloat measureText_CIII(JNIEnv* env, jobject jpaint, jcharArray text, int index, int count, 395 jint bidiFlags) { 396 NPE_CHECK_RETURN_ZERO(env, jpaint); 397 NPE_CHECK_RETURN_ZERO(env, text); 398 399 size_t textLength = env->GetArrayLength(text); 400 if ((index | count) < 0 || (size_t)(index + count) > textLength) { 401 doThrowAIOOBE(env); 402 return 0; 403 } 404 if (count == 0) { 405 return 0; 406 } 407 408 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 409 const jchar* textArray = env->GetCharArrayElements(text, NULL); 410 jfloat result = 0; 411 412 TextLayout::getTextRunAdvances(paint, textArray, index, count, textLength, 413 bidiFlags, NULL /* dont need all advances */, &result); 414 415 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); 416 return result; 417 } 418 419 static jfloat measureText_StringIII(JNIEnv* env, jobject jpaint, jstring text, int start, int end, 420 jint bidiFlags) { 421 NPE_CHECK_RETURN_ZERO(env, jpaint); 422 NPE_CHECK_RETURN_ZERO(env, text); 423 424 size_t textLength = env->GetStringLength(text); 425 int count = end - start; 426 if ((start | count) < 0 || (size_t)end > textLength) { 427 doThrowAIOOBE(env); 428 return 0; 429 } 430 if (count == 0) { 431 return 0; 432 } 433 434 const jchar* textArray = env->GetStringChars(text, NULL); 435 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 436 jfloat width = 0; 437 438 TextLayout::getTextRunAdvances(paint, textArray, start, count, textLength, 439 bidiFlags, NULL /* dont need all advances */, &width); 440 441 env->ReleaseStringChars(text, textArray); 442 return width; 443 } 444 445 static jfloat measureText_StringI(JNIEnv* env, jobject jpaint, jstring text, jint bidiFlags) { 446 NPE_CHECK_RETURN_ZERO(env, jpaint); 447 NPE_CHECK_RETURN_ZERO(env, text); 448 449 size_t textLength = env->GetStringLength(text); 450 if (textLength == 0) { 451 return 0; 452 } 453 454 const jchar* textArray = env->GetStringChars(text, NULL); 455 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 456 jfloat width = 0; 457 458 TextLayout::getTextRunAdvances(paint, textArray, 0, textLength, textLength, 459 bidiFlags, NULL /* dont need all advances */, &width); 460 461 env->ReleaseStringChars(text, textArray); 462 return width; 463 } 464 465 static int dotextwidths(JNIEnv* env, SkPaint* paint, const jchar text[], int count, jfloatArray widths, 466 jint bidiFlags) { 467 NPE_CHECK_RETURN_ZERO(env, paint); 468 NPE_CHECK_RETURN_ZERO(env, text); 469 470 if (count < 0 || !widths) { 471 doThrowAIOOBE(env); 472 return 0; 473 } 474 if (count == 0) { 475 return 0; 476 } 477 size_t widthsLength = env->GetArrayLength(widths); 478 if ((size_t)count > widthsLength) { 479 doThrowAIOOBE(env); 480 return 0; 481 } 482 483 AutoJavaFloatArray autoWidths(env, widths, count); 484 jfloat* widthsArray = autoWidths.ptr(); 485 486 TextLayout::getTextRunAdvances(paint, text, 0, count, count, 487 bidiFlags, widthsArray, NULL /* dont need totalAdvance */); 488 489 return count; 490 } 491 492 static int getTextWidths___CIII_F(JNIEnv* env, jobject clazz, SkPaint* paint, jcharArray text, 493 int index, int count, jint bidiFlags, jfloatArray widths) { 494 const jchar* textArray = env->GetCharArrayElements(text, NULL); 495 count = dotextwidths(env, paint, textArray + index, count, widths, bidiFlags); 496 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 497 JNI_ABORT); 498 return count; 499 } 500 501 static int getTextWidths__StringIII_F(JNIEnv* env, jobject clazz, SkPaint* paint, jstring text, 502 int start, int end, jint bidiFlags, jfloatArray widths) { 503 const jchar* textArray = env->GetStringChars(text, NULL); 504 int count = dotextwidths(env, paint, textArray + start, end - start, widths, bidiFlags); 505 env->ReleaseStringChars(text, textArray); 506 return count; 507 } 508 509 static int doTextGlyphs(JNIEnv* env, SkPaint* paint, const jchar* text, jint start, jint count, 510 jint contextCount, jint flags, jcharArray glyphs) { 511 NPE_CHECK_RETURN_ZERO(env, paint); 512 NPE_CHECK_RETURN_ZERO(env, text); 513 514 if ((start | count | contextCount) < 0 || contextCount < count || !glyphs) { 515 doThrowAIOOBE(env); 516 return 0; 517 } 518 if (count == 0) { 519 return 0; 520 } 521 size_t glypthsLength = env->GetArrayLength(glyphs); 522 if ((size_t)count > glypthsLength) { 523 doThrowAIOOBE(env); 524 return 0; 525 } 526 527 jchar* glyphsArray = env->GetCharArrayElements(glyphs, NULL); 528 529 sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(paint, 530 text, start, count, contextCount, flags); 531 const jchar* shapedGlyphs = value->getGlyphs(); 532 size_t glyphsCount = value->getGlyphsCount(); 533 memcpy(glyphsArray, shapedGlyphs, sizeof(jchar) * glyphsCount); 534 535 env->ReleaseCharArrayElements(glyphs, glyphsArray, JNI_ABORT); 536 return glyphsCount; 537 } 538 539 static int getTextGlyphs__StringIIIII_C(JNIEnv* env, jobject clazz, SkPaint* paint, 540 jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags, 541 jcharArray glyphs) { 542 const jchar* textArray = env->GetStringChars(text, NULL); 543 int count = doTextGlyphs(env, paint, textArray + contextStart, start - contextStart, 544 end - start, contextEnd - contextStart, flags, glyphs); 545 env->ReleaseStringChars(text, textArray); 546 return count; 547 } 548 549 static jfloat doTextRunAdvances(JNIEnv *env, SkPaint *paint, const jchar *text, 550 jint start, jint count, jint contextCount, jint flags, 551 jfloatArray advances, jint advancesIndex) { 552 NPE_CHECK_RETURN_ZERO(env, paint); 553 NPE_CHECK_RETURN_ZERO(env, text); 554 555 if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) { 556 doThrowAIOOBE(env); 557 return 0; 558 } 559 if (count == 0) { 560 return 0; 561 } 562 if (advances) { 563 size_t advancesLength = env->GetArrayLength(advances); 564 if ((size_t)count > advancesLength) { 565 doThrowAIOOBE(env); 566 return 0; 567 } 568 } 569 jfloat* advancesArray = new jfloat[count]; 570 jfloat totalAdvance = 0; 571 572 TextLayout::getTextRunAdvances(paint, text, start, count, contextCount, flags, 573 advancesArray, &totalAdvance); 574 575 if (advances != NULL) { 576 env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray); 577 } 578 delete [] advancesArray; 579 return totalAdvance; 580 } 581 582 static float getTextRunAdvances___CIIIII_FI(JNIEnv* env, jobject clazz, SkPaint* paint, 583 jcharArray text, jint index, jint count, jint contextIndex, jint contextCount, 584 jint flags, jfloatArray advances, jint advancesIndex) { 585 jchar* textArray = env->GetCharArrayElements(text, NULL); 586 jfloat result = doTextRunAdvances(env, paint, textArray + contextIndex, 587 index - contextIndex, count, contextCount, flags, advances, advancesIndex); 588 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 589 return result; 590 } 591 592 static float getTextRunAdvances__StringIIIII_FI(JNIEnv* env, jobject clazz, SkPaint* paint, 593 jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags, 594 jfloatArray advances, jint advancesIndex) { 595 const jchar* textArray = env->GetStringChars(text, NULL); 596 jfloat result = doTextRunAdvances(env, paint, textArray + contextStart, 597 start - contextStart, end - start, contextEnd - contextStart, flags, 598 advances, advancesIndex); 599 env->ReleaseStringChars(text, textArray); 600 return result; 601 } 602 603 static jint doTextRunCursor(JNIEnv *env, SkPaint* paint, const jchar *text, jint start, 604 jint count, jint flags, jint offset, jint opt) { 605 jfloat scalarArray[count]; 606 607 TextLayout::getTextRunAdvances(paint, text, start, count, start + count, flags, 608 scalarArray, NULL /* dont need totalAdvance */); 609 610 jint pos = offset - start; 611 switch (opt) { 612 case AFTER: 613 if (pos < count) { 614 pos += 1; 615 } 616 // fall through 617 case AT_OR_AFTER: 618 while (pos < count && scalarArray[pos] == 0) { 619 ++pos; 620 } 621 break; 622 case BEFORE: 623 if (pos > 0) { 624 --pos; 625 } 626 // fall through 627 case AT_OR_BEFORE: 628 while (pos > 0 && scalarArray[pos] == 0) { 629 --pos; 630 } 631 break; 632 case AT: 633 default: 634 if (scalarArray[pos] == 0) { 635 pos = -1; 636 } 637 break; 638 } 639 640 if (pos != -1) { 641 pos += start; 642 } 643 644 return pos; 645 } 646 647 static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, SkPaint* paint, jcharArray text, 648 jint contextStart, jint contextCount, jint flags, jint offset, jint cursorOpt) { 649 jchar* textArray = env->GetCharArrayElements(text, NULL); 650 jint result = doTextRunCursor(env, paint, textArray, contextStart, contextCount, flags, 651 offset, cursorOpt); 652 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 653 return result; 654 } 655 656 static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, SkPaint* paint, jstring text, 657 jint contextStart, jint contextEnd, jint flags, jint offset, jint cursorOpt) { 658 const jchar* textArray = env->GetStringChars(text, NULL); 659 jint result = doTextRunCursor(env, paint, textArray, contextStart, 660 contextEnd - contextStart, flags, offset, cursorOpt); 661 env->ReleaseStringChars(text, textArray); 662 return result; 663 } 664 665 static void getTextPath(JNIEnv* env, SkPaint* paint, const jchar* text, jint count, 666 jint bidiFlags, jfloat x, jfloat y, SkPath *path) { 667 TextLayout::getTextPath(paint, text, count, bidiFlags, x, y, path); 668 } 669 670 static void getTextPath___C(JNIEnv* env, jobject clazz, SkPaint* paint, jint bidiFlags, 671 jcharArray text, int index, int count, jfloat x, jfloat y, SkPath* path) { 672 const jchar* textArray = env->GetCharArrayElements(text, NULL); 673 getTextPath(env, paint, textArray + index, count, bidiFlags, x, y, path); 674 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); 675 } 676 677 static void getTextPath__String(JNIEnv* env, jobject clazz, SkPaint* paint, jint bidiFlags, 678 jstring text, int start, int end, jfloat x, jfloat y, SkPath* path) { 679 const jchar* textArray = env->GetStringChars(text, NULL); 680 getTextPath(env, paint, textArray + start, end - start, bidiFlags, x, y, path); 681 env->ReleaseStringChars(text, textArray); 682 } 683 684 static void setShadowLayer(JNIEnv* env, jobject jpaint, jfloat radius, 685 jfloat dx, jfloat dy, int color) { 686 NPE_CHECK_RETURN_VOID(env, jpaint); 687 688 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 689 if (radius <= 0) { 690 paint->setLooper(NULL); 691 } 692 else { 693 paint->setLooper(new SkBlurDrawLooper(SkFloatToScalar(radius), 694 SkFloatToScalar(dx), 695 SkFloatToScalar(dy), 696 (SkColor)color))->unref(); 697 } 698 } 699 700 static int breakText(JNIEnv* env, SkPaint& paint, const jchar text[], 701 int count, float maxWidth, jint bidiFlags, jfloatArray jmeasured, 702 SkPaint::TextBufferDirection tbd) { 703 sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(&paint, 704 text, 0, count, count, bidiFlags); 705 if (value == NULL) { 706 return 0; 707 } 708 SkScalar measured; 709 size_t bytes = paint.breakText(value->getGlyphs(), value->getGlyphsCount() << 1, 710 SkFloatToScalar(maxWidth), &measured, tbd); 711 SkASSERT((bytes & 1) == 0); 712 713 if (jmeasured && env->GetArrayLength(jmeasured) > 0) { 714 AutoJavaFloatArray autoMeasured(env, jmeasured, 1); 715 jfloat* array = autoMeasured.ptr(); 716 array[0] = SkScalarToFloat(measured); 717 } 718 return bytes >> 1; 719 } 720 721 static int breakTextC(JNIEnv* env, jobject jpaint, jcharArray jtext, 722 int index, int count, float maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) { 723 NPE_CHECK_RETURN_ZERO(env, jpaint); 724 NPE_CHECK_RETURN_ZERO(env, jtext); 725 726 SkPaint::TextBufferDirection tbd; 727 if (count < 0) { 728 tbd = SkPaint::kBackward_TextBufferDirection; 729 count = -count; 730 } 731 else { 732 tbd = SkPaint::kForward_TextBufferDirection; 733 } 734 735 if ((index < 0) || (index + count > env->GetArrayLength(jtext))) { 736 doThrowAIOOBE(env); 737 return 0; 738 } 739 740 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 741 const jchar* text = env->GetCharArrayElements(jtext, NULL); 742 count = breakText(env, *paint, text + index, count, maxWidth, 743 bidiFlags, jmeasuredWidth, tbd); 744 env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text), 745 JNI_ABORT); 746 return count; 747 } 748 749 static int breakTextS(JNIEnv* env, jobject jpaint, jstring jtext, 750 bool forwards, float maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) { 751 NPE_CHECK_RETURN_ZERO(env, jpaint); 752 NPE_CHECK_RETURN_ZERO(env, jtext); 753 754 SkPaint::TextBufferDirection tbd = forwards ? 755 SkPaint::kForward_TextBufferDirection : 756 SkPaint::kBackward_TextBufferDirection; 757 758 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 759 int count = env->GetStringLength(jtext); 760 const jchar* text = env->GetStringChars(jtext, NULL); 761 count = breakText(env, *paint, text, count, maxWidth, bidiFlags, jmeasuredWidth, tbd); 762 env->ReleaseStringChars(jtext, text); 763 return count; 764 } 765 766 static void doTextBounds(JNIEnv* env, const jchar* text, int count, 767 jobject bounds, const SkPaint& paint, jint bidiFlags) { 768 SkRect r; 769 SkIRect ir; 770 771 sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(&paint, 772 text, 0, count, count, bidiFlags); 773 if (value == NULL) { 774 return; 775 } 776 paint.measureText(value->getGlyphs(), value->getGlyphsCount() << 1, &r); 777 r.roundOut(&ir); 778 GraphicsJNI::irect_to_jrect(ir, env, bounds); 779 } 780 781 static void getStringBounds(JNIEnv* env, jobject, const SkPaint* paint, 782 jstring text, int start, int end, jint bidiFlags, jobject bounds) { 783 const jchar* textArray = env->GetStringChars(text, NULL); 784 doTextBounds(env, textArray + start, end - start, bounds, *paint, bidiFlags); 785 env->ReleaseStringChars(text, textArray); 786 } 787 788 static void getCharArrayBounds(JNIEnv* env, jobject, const SkPaint* paint, 789 jcharArray text, int index, int count, jint bidiFlags, jobject bounds) { 790 const jchar* textArray = env->GetCharArrayElements(text, NULL); 791 doTextBounds(env, textArray + index, count, bounds, *paint, bidiFlags); 792 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 793 JNI_ABORT); 794 } 795 796 }; 797 798 static JNINativeMethod methods[] = { 799 {"finalizer", "(I)V", (void*) SkPaintGlue::finalizer}, 800 {"native_init","()I", (void*) SkPaintGlue::init}, 801 {"native_initWithPaint","(I)I", (void*) SkPaintGlue::intiWithPaint}, 802 {"native_reset","(I)V", (void*) SkPaintGlue::reset}, 803 {"native_set","(II)V", (void*) SkPaintGlue::assign}, 804 {"getFlags","()I", (void*) SkPaintGlue::getFlags}, 805 {"setFlags","(I)V", (void*) SkPaintGlue::setFlags}, 806 {"getHinting","()I", (void*) SkPaintGlue::getHinting}, 807 {"setHinting","(I)V", (void*) SkPaintGlue::setHinting}, 808 {"setAntiAlias","(Z)V", (void*) SkPaintGlue::setAntiAlias}, 809 {"setSubpixelText","(Z)V", (void*) SkPaintGlue::setSubpixelText}, 810 {"setLinearText","(Z)V", (void*) SkPaintGlue::setLinearText}, 811 {"setUnderlineText","(Z)V", (void*) SkPaintGlue::setUnderlineText}, 812 {"setStrikeThruText","(Z)V", (void*) SkPaintGlue::setStrikeThruText}, 813 {"setFakeBoldText","(Z)V", (void*) SkPaintGlue::setFakeBoldText}, 814 {"setFilterBitmap","(Z)V", (void*) SkPaintGlue::setFilterBitmap}, 815 {"setDither","(Z)V", (void*) SkPaintGlue::setDither}, 816 {"native_getStyle","(I)I", (void*) SkPaintGlue::getStyle}, 817 {"native_setStyle","(II)V", (void*) SkPaintGlue::setStyle}, 818 {"getColor","()I", (void*) SkPaintGlue::getColor}, 819 {"setColor","(I)V", (void*) SkPaintGlue::setColor}, 820 {"getAlpha","()I", (void*) SkPaintGlue::getAlpha}, 821 {"setAlpha","(I)V", (void*) SkPaintGlue::setAlpha}, 822 {"getStrokeWidth","()F", (void*) SkPaintGlue::getStrokeWidth}, 823 {"setStrokeWidth","(F)V", (void*) SkPaintGlue::setStrokeWidth}, 824 {"getStrokeMiter","()F", (void*) SkPaintGlue::getStrokeMiter}, 825 {"setStrokeMiter","(F)V", (void*) SkPaintGlue::setStrokeMiter}, 826 {"native_getStrokeCap","(I)I", (void*) SkPaintGlue::getStrokeCap}, 827 {"native_setStrokeCap","(II)V", (void*) SkPaintGlue::setStrokeCap}, 828 {"native_getStrokeJoin","(I)I", (void*) SkPaintGlue::getStrokeJoin}, 829 {"native_setStrokeJoin","(II)V", (void*) SkPaintGlue::setStrokeJoin}, 830 {"native_getFillPath","(III)Z", (void*) SkPaintGlue::getFillPath}, 831 {"native_setShader","(II)I", (void*) SkPaintGlue::setShader}, 832 {"native_setColorFilter","(II)I", (void*) SkPaintGlue::setColorFilter}, 833 {"native_setXfermode","(II)I", (void*) SkPaintGlue::setXfermode}, 834 {"native_setPathEffect","(II)I", (void*) SkPaintGlue::setPathEffect}, 835 {"native_setMaskFilter","(II)I", (void*) SkPaintGlue::setMaskFilter}, 836 {"native_setTypeface","(II)I", (void*) SkPaintGlue::setTypeface}, 837 {"native_setRasterizer","(II)I", (void*) SkPaintGlue::setRasterizer}, 838 {"native_getTextAlign","(I)I", (void*) SkPaintGlue::getTextAlign}, 839 {"native_setTextAlign","(II)V", (void*) SkPaintGlue::setTextAlign}, 840 {"native_setTextLocale","(ILjava/lang/String;)V", (void*) SkPaintGlue::setTextLocale}, 841 {"getTextSize","()F", (void*) SkPaintGlue::getTextSize}, 842 {"setTextSize","(F)V", (void*) SkPaintGlue::setTextSize}, 843 {"getTextScaleX","()F", (void*) SkPaintGlue::getTextScaleX}, 844 {"setTextScaleX","(F)V", (void*) SkPaintGlue::setTextScaleX}, 845 {"getTextSkewX","()F", (void*) SkPaintGlue::getTextSkewX}, 846 {"setTextSkewX","(F)V", (void*) SkPaintGlue::setTextSkewX}, 847 {"ascent","()F", (void*) SkPaintGlue::ascent}, 848 {"descent","()F", (void*) SkPaintGlue::descent}, 849 {"getFontMetrics", "(Landroid/graphics/Paint$FontMetrics;)F", (void*)SkPaintGlue::getFontMetrics}, 850 {"getFontMetricsInt", "(Landroid/graphics/Paint$FontMetricsInt;)I", (void*)SkPaintGlue::getFontMetricsInt}, 851 {"native_measureText","([CIII)F", (void*) SkPaintGlue::measureText_CIII}, 852 {"native_measureText","(Ljava/lang/String;I)F", (void*) SkPaintGlue::measureText_StringI}, 853 {"native_measureText","(Ljava/lang/String;III)F", (void*) SkPaintGlue::measureText_StringIII}, 854 {"native_breakText","([CIIFI[F)I", (void*) SkPaintGlue::breakTextC}, 855 {"native_breakText","(Ljava/lang/String;ZFI[F)I", (void*) SkPaintGlue::breakTextS}, 856 {"native_getTextWidths","(I[CIII[F)I", (void*) SkPaintGlue::getTextWidths___CIII_F}, 857 {"native_getTextWidths","(ILjava/lang/String;III[F)I", (void*) SkPaintGlue::getTextWidths__StringIII_F}, 858 {"native_getTextRunAdvances","(I[CIIIII[FI)F", 859 (void*) SkPaintGlue::getTextRunAdvances___CIIIII_FI}, 860 {"native_getTextRunAdvances","(ILjava/lang/String;IIIII[FI)F", 861 (void*) SkPaintGlue::getTextRunAdvances__StringIIIII_FI}, 862 863 864 {"native_getTextGlyphs","(ILjava/lang/String;IIIII[C)I", 865 (void*) SkPaintGlue::getTextGlyphs__StringIIIII_C}, 866 {"native_getTextRunCursor", "(I[CIIIII)I", (void*) SkPaintGlue::getTextRunCursor___C}, 867 {"native_getTextRunCursor", "(ILjava/lang/String;IIIII)I", 868 (void*) SkPaintGlue::getTextRunCursor__String}, 869 {"native_getTextPath","(II[CIIFFI)V", (void*) SkPaintGlue::getTextPath___C}, 870 {"native_getTextPath","(IILjava/lang/String;IIFFI)V", (void*) SkPaintGlue::getTextPath__String}, 871 {"nativeGetStringBounds", "(ILjava/lang/String;IIILandroid/graphics/Rect;)V", 872 (void*) SkPaintGlue::getStringBounds }, 873 {"nativeGetCharArrayBounds", "(I[CIIILandroid/graphics/Rect;)V", 874 (void*) SkPaintGlue::getCharArrayBounds }, 875 {"nSetShadowLayer", "(FFFI)V", (void*)SkPaintGlue::setShadowLayer} 876 }; 877 878 static jfieldID req_fieldID(jfieldID id) { 879 SkASSERT(id); 880 return id; 881 } 882 883 int register_android_graphics_Paint(JNIEnv* env) { 884 gFontMetrics_class = env->FindClass("android/graphics/Paint$FontMetrics"); 885 SkASSERT(gFontMetrics_class); 886 gFontMetrics_class = (jclass)env->NewGlobalRef(gFontMetrics_class); 887 888 gFontMetrics_fieldID.top = req_fieldID(env->GetFieldID(gFontMetrics_class, "top", "F")); 889 gFontMetrics_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetrics_class, "ascent", "F")); 890 gFontMetrics_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetrics_class, "descent", "F")); 891 gFontMetrics_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetrics_class, "bottom", "F")); 892 gFontMetrics_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetrics_class, "leading", "F")); 893 894 gFontMetricsInt_class = env->FindClass("android/graphics/Paint$FontMetricsInt"); 895 SkASSERT(gFontMetricsInt_class); 896 gFontMetricsInt_class = (jclass)env->NewGlobalRef(gFontMetricsInt_class); 897 898 gFontMetricsInt_fieldID.top = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "top", "I")); 899 gFontMetricsInt_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "ascent", "I")); 900 gFontMetricsInt_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "descent", "I")); 901 gFontMetricsInt_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "bottom", "I")); 902 gFontMetricsInt_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "leading", "I")); 903 904 int result = AndroidRuntime::registerNativeMethods(env, "android/graphics/Paint", methods, 905 sizeof(methods) / sizeof(methods[0])); 906 return result; 907 } 908 909 } 910
