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 63 class SkPaintGlue { 64 public: 65 enum MoveOpt { 66 AFTER, AT_OR_AFTER, BEFORE, AT_OR_BEFORE, AT 67 }; 68 69 static void finalizer(JNIEnv* env, jobject clazz, SkPaint* obj) { 70 delete obj; 71 } 72 73 static SkPaint* init(JNIEnv* env, jobject clazz) { 74 SkPaint* obj = new SkPaint(); 75 defaultSettingsForAndroid(obj); 76 return obj; 77 } 78 79 static SkPaint* intiWithPaint(JNIEnv* env, jobject clazz, SkPaint* paint) { 80 SkPaint* obj = new SkPaint(*paint); 81 return obj; 82 } 83 84 static void reset(JNIEnv* env, jobject clazz, SkPaint* obj) { 85 obj->reset(); 86 defaultSettingsForAndroid(obj); 87 } 88 89 static void assign(JNIEnv* env, jobject clazz, SkPaint* dst, const SkPaint* src) { 90 *dst = *src; 91 } 92 93 static jint getFlags(JNIEnv* env, jobject paint) { 94 NPE_CHECK_RETURN_ZERO(env, paint); 95 return GraphicsJNI::getNativePaint(env, paint)->getFlags(); 96 } 97 98 static void setFlags(JNIEnv* env, jobject paint, jint flags) { 99 NPE_CHECK_RETURN_VOID(env, paint); 100 GraphicsJNI::getNativePaint(env, paint)->setFlags(flags); 101 } 102 103 static jint getHinting(JNIEnv* env, jobject paint) { 104 NPE_CHECK_RETURN_ZERO(env, paint); 105 return GraphicsJNI::getNativePaint(env, paint)->getHinting() 106 == SkPaint::kNo_Hinting ? 0 : 1; 107 } 108 109 static void setHinting(JNIEnv* env, jobject paint, jint mode) { 110 NPE_CHECK_RETURN_VOID(env, paint); 111 GraphicsJNI::getNativePaint(env, paint)->setHinting( 112 mode == 0 ? SkPaint::kNo_Hinting : SkPaint::kSlight_Hinting); 113 } 114 115 static void setAntiAlias(JNIEnv* env, jobject paint, jboolean aa) { 116 NPE_CHECK_RETURN_VOID(env, paint); 117 GraphicsJNI::getNativePaint(env, paint)->setAntiAlias(aa); 118 } 119 120 static void setLinearText(JNIEnv* env, jobject paint, jboolean linearText) { 121 NPE_CHECK_RETURN_VOID(env, paint); 122 GraphicsJNI::getNativePaint(env, paint)->setLinearText(linearText); 123 } 124 125 static void setSubpixelText(JNIEnv* env, jobject paint, jboolean subpixelText) { 126 NPE_CHECK_RETURN_VOID(env, paint); 127 GraphicsJNI::getNativePaint(env, paint)->setSubpixelText(subpixelText); 128 } 129 130 static void setUnderlineText(JNIEnv* env, jobject paint, jboolean underlineText) { 131 NPE_CHECK_RETURN_VOID(env, paint); 132 GraphicsJNI::getNativePaint(env, paint)->setUnderlineText(underlineText); 133 } 134 135 static void setStrikeThruText(JNIEnv* env, jobject paint, jboolean strikeThruText) { 136 NPE_CHECK_RETURN_VOID(env, paint); 137 GraphicsJNI::getNativePaint(env, paint)->setStrikeThruText(strikeThruText); 138 } 139 140 static void setFakeBoldText(JNIEnv* env, jobject paint, jboolean fakeBoldText) { 141 NPE_CHECK_RETURN_VOID(env, paint); 142 GraphicsJNI::getNativePaint(env, paint)->setFakeBoldText(fakeBoldText); 143 } 144 145 static void setFilterBitmap(JNIEnv* env, jobject paint, jboolean filterBitmap) { 146 NPE_CHECK_RETURN_VOID(env, paint); 147 GraphicsJNI::getNativePaint(env, paint)->setFilterBitmap(filterBitmap); 148 } 149 150 static void setDither(JNIEnv* env, jobject paint, jboolean dither) { 151 NPE_CHECK_RETURN_VOID(env, paint); 152 GraphicsJNI::getNativePaint(env, paint)->setDither(dither); 153 } 154 155 static jint getStyle(JNIEnv* env, jobject clazz, SkPaint* obj) { 156 return obj->getStyle(); 157 } 158 159 static void setStyle(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Style style) { 160 obj->setStyle(style); 161 } 162 163 static jint getColor(JNIEnv* env, jobject paint) { 164 NPE_CHECK_RETURN_ZERO(env, paint); 165 return GraphicsJNI::getNativePaint(env, paint)->getColor(); 166 } 167 168 static jint getAlpha(JNIEnv* env, jobject paint) { 169 NPE_CHECK_RETURN_ZERO(env, paint); 170 return GraphicsJNI::getNativePaint(env, paint)->getAlpha(); 171 } 172 173 static void setColor(JNIEnv* env, jobject paint, jint color) { 174 NPE_CHECK_RETURN_VOID(env, paint); 175 GraphicsJNI::getNativePaint(env, paint)->setColor(color); 176 } 177 178 static void setAlpha(JNIEnv* env, jobject paint, jint a) { 179 NPE_CHECK_RETURN_VOID(env, paint); 180 GraphicsJNI::getNativePaint(env, paint)->setAlpha(a); 181 } 182 183 static jfloat getStrokeWidth(JNIEnv* env, jobject paint) { 184 NPE_CHECK_RETURN_ZERO(env, paint); 185 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeWidth()); 186 } 187 188 static void setStrokeWidth(JNIEnv* env, jobject paint, jfloat width) { 189 NPE_CHECK_RETURN_VOID(env, paint); 190 GraphicsJNI::getNativePaint(env, paint)->setStrokeWidth(SkFloatToScalar(width)); 191 } 192 193 static jfloat getStrokeMiter(JNIEnv* env, jobject paint) { 194 NPE_CHECK_RETURN_ZERO(env, paint); 195 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeMiter()); 196 } 197 198 static void setStrokeMiter(JNIEnv* env, jobject paint, jfloat miter) { 199 NPE_CHECK_RETURN_VOID(env, paint); 200 GraphicsJNI::getNativePaint(env, paint)->setStrokeMiter(SkFloatToScalar(miter)); 201 } 202 203 static jint getStrokeCap(JNIEnv* env, jobject clazz, SkPaint* obj) { 204 return obj->getStrokeCap(); 205 } 206 207 static void setStrokeCap(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Cap cap) { 208 obj->setStrokeCap(cap); 209 } 210 211 static jint getStrokeJoin(JNIEnv* env, jobject clazz, SkPaint* obj) { 212 return obj->getStrokeJoin(); 213 } 214 215 static void setStrokeJoin(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Join join) { 216 obj->setStrokeJoin(join); 217 } 218 219 static jboolean getFillPath(JNIEnv* env, jobject clazz, SkPaint* obj, SkPath* src, SkPath* dst) { 220 return obj->getFillPath(*src, dst); 221 } 222 223 static SkShader* setShader(JNIEnv* env, jobject clazz, SkPaint* obj, SkShader* shader) { 224 return obj->setShader(shader); 225 } 226 227 static SkColorFilter* setColorFilter(JNIEnv* env, jobject clazz, SkPaint* obj, SkColorFilter* filter) { 228 return obj->setColorFilter(filter); 229 } 230 231 static SkXfermode* setXfermode(JNIEnv* env, jobject clazz, SkPaint* obj, SkXfermode* xfermode) { 232 return obj->setXfermode(xfermode); 233 } 234 235 static SkPathEffect* setPathEffect(JNIEnv* env, jobject clazz, SkPaint* obj, SkPathEffect* effect) { 236 return obj->setPathEffect(effect); 237 } 238 239 static SkMaskFilter* setMaskFilter(JNIEnv* env, jobject clazz, SkPaint* obj, SkMaskFilter* maskfilter) { 240 return obj->setMaskFilter(maskfilter); 241 } 242 243 static SkTypeface* setTypeface(JNIEnv* env, jobject clazz, SkPaint* obj, SkTypeface* typeface) { 244 return obj->setTypeface(typeface); 245 } 246 247 static SkRasterizer* setRasterizer(JNIEnv* env, jobject clazz, SkPaint* obj, SkRasterizer* rasterizer) { 248 return obj->setRasterizer(rasterizer); 249 } 250 251 static jint getTextAlign(JNIEnv* env, jobject clazz, SkPaint* obj) { 252 return obj->getTextAlign(); 253 } 254 255 static void setTextAlign(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Align align) { 256 obj->setTextAlign(align); 257 } 258 259 // generate bcp47 identifier for the supplied locale 260 static void toLanguageTag(char* output, size_t outSize, 261 const char* locale) { 262 if (output == NULL || outSize <= 0) { 263 return; 264 } 265 if (locale == NULL) { 266 output[0] = '\0'; 267 return; 268 } 269 char canonicalChars[ULOC_FULLNAME_CAPACITY]; 270 UErrorCode uErr = U_ZERO_ERROR; 271 uloc_canonicalize(locale, canonicalChars, ULOC_FULLNAME_CAPACITY, 272 &uErr); 273 if (U_SUCCESS(uErr)) { 274 char likelyChars[ULOC_FULLNAME_CAPACITY]; 275 uErr = U_ZERO_ERROR; 276 uloc_addLikelySubtags(canonicalChars, likelyChars, 277 ULOC_FULLNAME_CAPACITY, &uErr); 278 if (U_SUCCESS(uErr)) { 279 uErr = U_ZERO_ERROR; 280 uloc_toLanguageTag(likelyChars, output, outSize, FALSE, &uErr); 281 if (U_SUCCESS(uErr)) { 282 return; 283 } else { 284 ALOGD("uloc_toLanguageTag(\"%s\") failed: %s", likelyChars, 285 u_errorName(uErr)); 286 } 287 } else { 288 ALOGD("uloc_addLikelySubtags(\"%s\") failed: %s", 289 canonicalChars, u_errorName(uErr)); 290 } 291 } else { 292 ALOGD("uloc_canonicalize(\"%s\") failed: %s", locale, 293 u_errorName(uErr)); 294 } 295 // unable to build a proper language identifier 296 output[0] = '\0'; 297 } 298 299 static void setTextLocale(JNIEnv* env, jobject clazz, SkPaint* obj, jstring locale) { 300 ScopedUtfChars localeChars(env, locale); 301 char langTag[ULOC_FULLNAME_CAPACITY]; 302 toLanguageTag(langTag, ULOC_FULLNAME_CAPACITY, localeChars.c_str()); 303 obj->setLanguage(SkLanguage(langTag)); 304 } 305 306 static jfloat getTextSize(JNIEnv* env, jobject paint) { 307 NPE_CHECK_RETURN_ZERO(env, paint); 308 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSize()); 309 } 310 311 static void setTextSize(JNIEnv* env, jobject paint, jfloat textSize) { 312 NPE_CHECK_RETURN_VOID(env, paint); 313 GraphicsJNI::getNativePaint(env, paint)->setTextSize(SkFloatToScalar(textSize)); 314 } 315 316 static jfloat getTextScaleX(JNIEnv* env, jobject paint) { 317 NPE_CHECK_RETURN_ZERO(env, paint); 318 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextScaleX()); 319 } 320 321 static void setTextScaleX(JNIEnv* env, jobject paint, jfloat scaleX) { 322 NPE_CHECK_RETURN_VOID(env, paint); 323 GraphicsJNI::getNativePaint(env, paint)->setTextScaleX(SkFloatToScalar(scaleX)); 324 } 325 326 static jfloat getTextSkewX(JNIEnv* env, jobject paint) { 327 NPE_CHECK_RETURN_ZERO(env, paint); 328 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSkewX()); 329 } 330 331 static void setTextSkewX(JNIEnv* env, jobject paint, jfloat skewX) { 332 NPE_CHECK_RETURN_VOID(env, paint); 333 GraphicsJNI::getNativePaint(env, paint)->setTextSkewX(SkFloatToScalar(skewX)); 334 } 335 336 static jfloat ascent(JNIEnv* env, jobject paint) { 337 NPE_CHECK_RETURN_ZERO(env, paint); 338 SkPaint::FontMetrics metrics; 339 (void)GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 340 return SkScalarToFloat(metrics.fAscent); 341 } 342 343 static jfloat descent(JNIEnv* env, jobject paint) { 344 NPE_CHECK_RETURN_ZERO(env, paint); 345 SkPaint::FontMetrics metrics; 346 (void)GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 347 return SkScalarToFloat(metrics.fDescent); 348 } 349 350 static jfloat getFontMetrics(JNIEnv* env, jobject paint, jobject metricsObj) { 351 NPE_CHECK_RETURN_ZERO(env, paint); 352 SkPaint::FontMetrics metrics; 353 SkScalar spacing = GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 354 355 if (metricsObj) { 356 SkASSERT(env->IsInstanceOf(metricsObj, gFontMetrics_class)); 357 env->SetFloatField(metricsObj, gFontMetrics_fieldID.top, SkScalarToFloat(metrics.fTop)); 358 env->SetFloatField(metricsObj, gFontMetrics_fieldID.ascent, SkScalarToFloat(metrics.fAscent)); 359 env->SetFloatField(metricsObj, gFontMetrics_fieldID.descent, SkScalarToFloat(metrics.fDescent)); 360 env->SetFloatField(metricsObj, gFontMetrics_fieldID.bottom, SkScalarToFloat(metrics.fBottom)); 361 env->SetFloatField(metricsObj, gFontMetrics_fieldID.leading, SkScalarToFloat(metrics.fLeading)); 362 } 363 return SkScalarToFloat(spacing); 364 } 365 366 static jint getFontMetricsInt(JNIEnv* env, jobject paint, jobject metricsObj) { 367 NPE_CHECK_RETURN_ZERO(env, paint); 368 SkPaint::FontMetrics metrics; 369 370 GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 371 int ascent = SkScalarRound(metrics.fAscent); 372 int descent = SkScalarRound(metrics.fDescent); 373 int leading = SkScalarRound(metrics.fLeading); 374 375 if (metricsObj) { 376 SkASSERT(env->IsInstanceOf(metricsObj, gFontMetricsInt_class)); 377 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.top, SkScalarFloor(metrics.fTop)); 378 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.ascent, ascent); 379 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.descent, descent); 380 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.bottom, SkScalarCeil(metrics.fBottom)); 381 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.leading, leading); 382 } 383 return descent - ascent + leading; 384 } 385 386 static jfloat measureText_CII(JNIEnv* env, jobject jpaint, jcharArray text, int index, int count) { 387 NPE_CHECK_RETURN_ZERO(env, jpaint); 388 NPE_CHECK_RETURN_ZERO(env, text); 389 390 size_t textLength = env->GetArrayLength(text); 391 if ((index | count) < 0 || (size_t)(index + count) > textLength) { 392 doThrowAIOOBE(env); 393 return 0; 394 } 395 if (count == 0) { 396 return 0; 397 } 398 399 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 400 const jchar* textArray = env->GetCharArrayElements(text, NULL); 401 jfloat result = 0; 402 403 TextLayout::getTextRunAdvances(paint, textArray, index, count, textLength, 404 paint->getFlags(), NULL /* dont need all advances */, &result); 405 406 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); 407 return result; 408 } 409 410 static jfloat measureText_StringII(JNIEnv* env, jobject jpaint, jstring text, int start, int end) { 411 NPE_CHECK_RETURN_ZERO(env, jpaint); 412 NPE_CHECK_RETURN_ZERO(env, text); 413 414 size_t textLength = env->GetStringLength(text); 415 int count = end - start; 416 if ((start | count) < 0 || (size_t)end > textLength) { 417 doThrowAIOOBE(env); 418 return 0; 419 } 420 if (count == 0) { 421 return 0; 422 } 423 424 const jchar* textArray = env->GetStringChars(text, NULL); 425 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 426 jfloat width = 0; 427 428 TextLayout::getTextRunAdvances(paint, textArray, start, count, textLength, 429 paint->getFlags(), NULL /* dont need all advances */, &width); 430 431 env->ReleaseStringChars(text, textArray); 432 return width; 433 } 434 435 static jfloat measureText_String(JNIEnv* env, jobject jpaint, jstring text) { 436 NPE_CHECK_RETURN_ZERO(env, jpaint); 437 NPE_CHECK_RETURN_ZERO(env, text); 438 439 size_t textLength = env->GetStringLength(text); 440 if (textLength == 0) { 441 return 0; 442 } 443 444 const jchar* textArray = env->GetStringChars(text, NULL); 445 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 446 jfloat width = 0; 447 448 TextLayout::getTextRunAdvances(paint, textArray, 0, textLength, textLength, 449 paint->getFlags(), NULL /* dont need all advances */, &width); 450 451 env->ReleaseStringChars(text, textArray); 452 return width; 453 } 454 455 static int dotextwidths(JNIEnv* env, SkPaint* paint, const jchar text[], int count, jfloatArray widths) { 456 NPE_CHECK_RETURN_ZERO(env, paint); 457 NPE_CHECK_RETURN_ZERO(env, text); 458 459 if (count < 0 || !widths) { 460 doThrowAIOOBE(env); 461 return 0; 462 } 463 if (count == 0) { 464 return 0; 465 } 466 size_t widthsLength = env->GetArrayLength(widths); 467 if ((size_t)count > widthsLength) { 468 doThrowAIOOBE(env); 469 return 0; 470 } 471 472 AutoJavaFloatArray autoWidths(env, widths, count); 473 jfloat* widthsArray = autoWidths.ptr(); 474 475 TextLayout::getTextRunAdvances(paint, text, 0, count, count, 476 paint->getFlags(), widthsArray, NULL /* dont need totalAdvance */); 477 478 return count; 479 } 480 481 static int getTextWidths___CII_F(JNIEnv* env, jobject clazz, SkPaint* paint, jcharArray text, int index, int count, jfloatArray widths) { 482 const jchar* textArray = env->GetCharArrayElements(text, NULL); 483 count = dotextwidths(env, paint, textArray + index, count, widths); 484 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 485 JNI_ABORT); 486 return count; 487 } 488 489 static int getTextWidths__StringII_F(JNIEnv* env, jobject clazz, SkPaint* paint, jstring text, 490 int start, int end, jfloatArray widths) { 491 const jchar* textArray = env->GetStringChars(text, NULL); 492 int count = dotextwidths(env, paint, textArray + start, end - start, widths); 493 env->ReleaseStringChars(text, textArray); 494 return count; 495 } 496 497 static int doTextGlyphs(JNIEnv* env, SkPaint* paint, const jchar* text, jint start, jint count, 498 jint contextCount, jint flags, jcharArray glyphs) { 499 NPE_CHECK_RETURN_ZERO(env, paint); 500 NPE_CHECK_RETURN_ZERO(env, text); 501 502 if ((start | count | contextCount) < 0 || contextCount < count || !glyphs) { 503 doThrowAIOOBE(env); 504 return 0; 505 } 506 if (count == 0) { 507 return 0; 508 } 509 size_t glypthsLength = env->GetArrayLength(glyphs); 510 if ((size_t)count > glypthsLength) { 511 doThrowAIOOBE(env); 512 return 0; 513 } 514 515 jchar* glyphsArray = env->GetCharArrayElements(glyphs, NULL); 516 517 sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(paint, 518 text, start, count, contextCount, flags); 519 const jchar* shapedGlyphs = value->getGlyphs(); 520 size_t glyphsCount = value->getGlyphsCount(); 521 memcpy(glyphsArray, shapedGlyphs, sizeof(jchar) * glyphsCount); 522 523 env->ReleaseCharArrayElements(glyphs, glyphsArray, JNI_ABORT); 524 return glyphsCount; 525 } 526 527 static int getTextGlyphs__StringIIIII_C(JNIEnv* env, jobject clazz, SkPaint* paint, 528 jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags, 529 jcharArray glyphs) { 530 const jchar* textArray = env->GetStringChars(text, NULL); 531 int count = doTextGlyphs(env, paint, textArray + contextStart, start - contextStart, 532 end - start, contextEnd - contextStart, flags, glyphs); 533 env->ReleaseStringChars(text, textArray); 534 return count; 535 } 536 537 static jfloat doTextRunAdvances(JNIEnv *env, SkPaint *paint, const jchar *text, 538 jint start, jint count, jint contextCount, jint flags, 539 jfloatArray advances, jint advancesIndex) { 540 NPE_CHECK_RETURN_ZERO(env, paint); 541 NPE_CHECK_RETURN_ZERO(env, text); 542 543 if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) { 544 doThrowAIOOBE(env); 545 return 0; 546 } 547 if (count == 0) { 548 return 0; 549 } 550 if (advances) { 551 size_t advancesLength = env->GetArrayLength(advances); 552 if ((size_t)count > advancesLength) { 553 doThrowAIOOBE(env); 554 return 0; 555 } 556 } 557 jfloat advancesArray[count]; 558 jfloat totalAdvance = 0; 559 560 TextLayout::getTextRunAdvances(paint, text, start, count, contextCount, flags, 561 advancesArray, &totalAdvance); 562 563 if (advances != NULL) { 564 env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray); 565 } 566 return totalAdvance; 567 } 568 569 static jfloat doTextRunAdvancesICU(JNIEnv *env, SkPaint *paint, const jchar *text, 570 jint start, jint count, jint contextCount, jint flags, 571 jfloatArray advances, jint advancesIndex) { 572 NPE_CHECK_RETURN_ZERO(env, paint); 573 NPE_CHECK_RETURN_ZERO(env, text); 574 575 if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) { 576 doThrowAIOOBE(env); 577 return 0; 578 } 579 if (count == 0) { 580 return 0; 581 } 582 if (advances) { 583 size_t advancesLength = env->GetArrayLength(advances); 584 if ((size_t)count > advancesLength) { 585 doThrowAIOOBE(env); 586 return 0; 587 } 588 } 589 590 jfloat advancesArray[count]; 591 jfloat totalAdvance = 0; 592 593 TextLayout::getTextRunAdvancesICU(paint, text, start, count, contextCount, flags, 594 advancesArray, totalAdvance); 595 596 if (advances != NULL) { 597 env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray); 598 } 599 return totalAdvance; 600 } 601 602 static float getTextRunAdvances___CIIIII_FII(JNIEnv* env, jobject clazz, SkPaint* paint, 603 jcharArray text, jint index, jint count, jint contextIndex, jint contextCount, 604 jint flags, jfloatArray advances, jint advancesIndex, jint reserved) { 605 jchar* textArray = env->GetCharArrayElements(text, NULL); 606 jfloat result = (reserved == 0) ? 607 doTextRunAdvances(env, paint, textArray + contextIndex, index - contextIndex, 608 count, contextCount, flags, advances, advancesIndex) : 609 doTextRunAdvancesICU(env, paint, textArray + contextIndex, index - contextIndex, 610 count, contextCount, flags, advances, advancesIndex); 611 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 612 return result; 613 } 614 615 static float getTextRunAdvances__StringIIIII_FII(JNIEnv* env, jobject clazz, SkPaint* paint, 616 jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags, 617 jfloatArray advances, jint advancesIndex, jint reserved) { 618 const jchar* textArray = env->GetStringChars(text, NULL); 619 jfloat result = (reserved == 0) ? 620 doTextRunAdvances(env, paint, textArray + contextStart, start - contextStart, 621 end - start, contextEnd - contextStart, flags, advances, advancesIndex) : 622 doTextRunAdvancesICU(env, paint, textArray + contextStart, start - contextStart, 623 end - start, contextEnd - contextStart, flags, advances, advancesIndex); 624 env->ReleaseStringChars(text, textArray); 625 return result; 626 } 627 628 static jint doTextRunCursor(JNIEnv *env, SkPaint* paint, const jchar *text, jint start, 629 jint count, jint flags, jint offset, jint opt) { 630 jfloat scalarArray[count]; 631 632 TextLayout::getTextRunAdvances(paint, text, start, count, start + count, flags, 633 scalarArray, NULL /* dont need totalAdvance */); 634 635 jint pos = offset - start; 636 switch (opt) { 637 case AFTER: 638 if (pos < count) { 639 pos += 1; 640 } 641 // fall through 642 case AT_OR_AFTER: 643 while (pos < count && scalarArray[pos] == 0) { 644 ++pos; 645 } 646 break; 647 case BEFORE: 648 if (pos > 0) { 649 --pos; 650 } 651 // fall through 652 case AT_OR_BEFORE: 653 while (pos > 0 && scalarArray[pos] == 0) { 654 --pos; 655 } 656 break; 657 case AT: 658 default: 659 if (scalarArray[pos] == 0) { 660 pos = -1; 661 } 662 break; 663 } 664 665 if (pos != -1) { 666 pos += start; 667 } 668 669 return pos; 670 } 671 672 static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, SkPaint* paint, jcharArray text, 673 jint contextStart, jint contextCount, jint flags, jint offset, jint cursorOpt) { 674 jchar* textArray = env->GetCharArrayElements(text, NULL); 675 jint result = doTextRunCursor(env, paint, textArray, contextStart, contextCount, flags, 676 offset, cursorOpt); 677 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 678 return result; 679 } 680 681 static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, SkPaint* paint, jstring text, 682 jint contextStart, jint contextEnd, jint flags, jint offset, jint cursorOpt) { 683 const jchar* textArray = env->GetStringChars(text, NULL); 684 jint result = doTextRunCursor(env, paint, textArray, contextStart, 685 contextEnd - contextStart, flags, offset, cursorOpt); 686 env->ReleaseStringChars(text, textArray); 687 return result; 688 } 689 690 static void getTextPath(JNIEnv* env, SkPaint* paint, const jchar* text, jint count, 691 jint bidiFlags, jfloat x, jfloat y, SkPath *path) { 692 TextLayout::getTextPath(paint, text, count, bidiFlags, x, y, path); 693 } 694 695 static void getTextPath___C(JNIEnv* env, jobject clazz, SkPaint* paint, jint bidiFlags, 696 jcharArray text, int index, int count, jfloat x, jfloat y, SkPath* path) { 697 const jchar* textArray = env->GetCharArrayElements(text, NULL); 698 getTextPath(env, paint, textArray + index, count, bidiFlags, x, y, path); 699 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); 700 } 701 702 static void getTextPath__String(JNIEnv* env, jobject clazz, SkPaint* paint, jint bidiFlags, 703 jstring text, int start, int end, jfloat x, jfloat y, SkPath* path) { 704 const jchar* textArray = env->GetStringChars(text, NULL); 705 getTextPath(env, paint, textArray + start, end - start, bidiFlags, x, y, path); 706 env->ReleaseStringChars(text, textArray); 707 } 708 709 static void setShadowLayer(JNIEnv* env, jobject jpaint, jfloat radius, 710 jfloat dx, jfloat dy, int color) { 711 NPE_CHECK_RETURN_VOID(env, jpaint); 712 713 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 714 if (radius <= 0) { 715 paint->setLooper(NULL); 716 } 717 else { 718 paint->setLooper(new SkBlurDrawLooper(SkFloatToScalar(radius), 719 SkFloatToScalar(dx), 720 SkFloatToScalar(dy), 721 (SkColor)color))->unref(); 722 } 723 } 724 725 static int breakText(JNIEnv* env, SkPaint& paint, const jchar text[], 726 int count, float maxWidth, jfloatArray jmeasured, 727 SkPaint::TextBufferDirection tbd) { 728 sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(&paint, 729 text, 0, count, count, paint.getFlags()); 730 if (value == NULL) { 731 return 0; 732 } 733 SkScalar measured; 734 size_t bytes = paint.breakText(value->getGlyphs(), value->getGlyphsCount() << 1, 735 SkFloatToScalar(maxWidth), &measured, tbd); 736 SkASSERT((bytes & 1) == 0); 737 738 if (jmeasured && env->GetArrayLength(jmeasured) > 0) { 739 AutoJavaFloatArray autoMeasured(env, jmeasured, 1); 740 jfloat* array = autoMeasured.ptr(); 741 array[0] = SkScalarToFloat(measured); 742 } 743 return bytes >> 1; 744 } 745 746 static int breakTextC(JNIEnv* env, jobject jpaint, jcharArray jtext, 747 int index, int count, float maxWidth, jfloatArray jmeasuredWidth) { 748 NPE_CHECK_RETURN_ZERO(env, jpaint); 749 NPE_CHECK_RETURN_ZERO(env, jtext); 750 751 SkPaint::TextBufferDirection tbd; 752 if (count < 0) { 753 tbd = SkPaint::kBackward_TextBufferDirection; 754 count = -count; 755 } 756 else { 757 tbd = SkPaint::kForward_TextBufferDirection; 758 } 759 760 if ((index < 0) || (index + count > env->GetArrayLength(jtext))) { 761 doThrowAIOOBE(env); 762 return 0; 763 } 764 765 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 766 const jchar* text = env->GetCharArrayElements(jtext, NULL); 767 count = breakText(env, *paint, text + index, count, maxWidth, 768 jmeasuredWidth, tbd); 769 env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text), 770 JNI_ABORT); 771 return count; 772 } 773 774 static int breakTextS(JNIEnv* env, jobject jpaint, jstring jtext, 775 bool forwards, float maxWidth, jfloatArray jmeasuredWidth) { 776 NPE_CHECK_RETURN_ZERO(env, jpaint); 777 NPE_CHECK_RETURN_ZERO(env, jtext); 778 779 SkPaint::TextBufferDirection tbd = forwards ? 780 SkPaint::kForward_TextBufferDirection : 781 SkPaint::kBackward_TextBufferDirection; 782 783 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 784 int count = env->GetStringLength(jtext); 785 const jchar* text = env->GetStringChars(jtext, NULL); 786 count = breakText(env, *paint, text, count, maxWidth, 787 jmeasuredWidth, tbd); 788 env->ReleaseStringChars(jtext, text); 789 return count; 790 } 791 792 static void doTextBounds(JNIEnv* env, const jchar* text, int count, 793 jobject bounds, const SkPaint& paint) 794 { 795 SkRect r{0,0,0,0}; 796 SkIRect ir; 797 798 sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(&paint, 799 text, 0, count, count, paint.getFlags()); 800 if (value == NULL) { 801 return; 802 } 803 paint.measureText(value->getGlyphs(), value->getGlyphsCount() << 1, &r); 804 r.roundOut(&ir); 805 GraphicsJNI::irect_to_jrect(ir, env, bounds); 806 } 807 808 static void getStringBounds(JNIEnv* env, jobject, const SkPaint* paint, 809 jstring text, int start, int end, jobject bounds) 810 { 811 const jchar* textArray = env->GetStringChars(text, NULL); 812 doTextBounds(env, textArray + start, end - start, bounds, *paint); 813 env->ReleaseStringChars(text, textArray); 814 } 815 816 static void getCharArrayBounds(JNIEnv* env, jobject, const SkPaint* paint, 817 jcharArray text, int index, int count, jobject bounds) 818 { 819 const jchar* textArray = env->GetCharArrayElements(text, NULL); 820 doTextBounds(env, textArray + index, count, bounds, *paint); 821 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 822 JNI_ABORT); 823 } 824 825 }; 826 827 static JNINativeMethod methods[] = { 828 {"finalizer", "(I)V", (void*) SkPaintGlue::finalizer}, 829 {"native_init","()I", (void*) SkPaintGlue::init}, 830 {"native_initWithPaint","(I)I", (void*) SkPaintGlue::intiWithPaint}, 831 {"native_reset","(I)V", (void*) SkPaintGlue::reset}, 832 {"native_set","(II)V", (void*) SkPaintGlue::assign}, 833 {"getFlags","()I", (void*) SkPaintGlue::getFlags}, 834 {"setFlags","(I)V", (void*) SkPaintGlue::setFlags}, 835 {"getHinting","()I", (void*) SkPaintGlue::getHinting}, 836 {"setHinting","(I)V", (void*) SkPaintGlue::setHinting}, 837 {"setAntiAlias","(Z)V", (void*) SkPaintGlue::setAntiAlias}, 838 {"setSubpixelText","(Z)V", (void*) SkPaintGlue::setSubpixelText}, 839 {"setLinearText","(Z)V", (void*) SkPaintGlue::setLinearText}, 840 {"setUnderlineText","(Z)V", (void*) SkPaintGlue::setUnderlineText}, 841 {"setStrikeThruText","(Z)V", (void*) SkPaintGlue::setStrikeThruText}, 842 {"setFakeBoldText","(Z)V", (void*) SkPaintGlue::setFakeBoldText}, 843 {"setFilterBitmap","(Z)V", (void*) SkPaintGlue::setFilterBitmap}, 844 {"setDither","(Z)V", (void*) SkPaintGlue::setDither}, 845 {"native_getStyle","(I)I", (void*) SkPaintGlue::getStyle}, 846 {"native_setStyle","(II)V", (void*) SkPaintGlue::setStyle}, 847 {"getColor","()I", (void*) SkPaintGlue::getColor}, 848 {"setColor","(I)V", (void*) SkPaintGlue::setColor}, 849 {"getAlpha","()I", (void*) SkPaintGlue::getAlpha}, 850 {"setAlpha","(I)V", (void*) SkPaintGlue::setAlpha}, 851 {"getStrokeWidth","()F", (void*) SkPaintGlue::getStrokeWidth}, 852 {"setStrokeWidth","(F)V", (void*) SkPaintGlue::setStrokeWidth}, 853 {"getStrokeMiter","()F", (void*) SkPaintGlue::getStrokeMiter}, 854 {"setStrokeMiter","(F)V", (void*) SkPaintGlue::setStrokeMiter}, 855 {"native_getStrokeCap","(I)I", (void*) SkPaintGlue::getStrokeCap}, 856 {"native_setStrokeCap","(II)V", (void*) SkPaintGlue::setStrokeCap}, 857 {"native_getStrokeJoin","(I)I", (void*) SkPaintGlue::getStrokeJoin}, 858 {"native_setStrokeJoin","(II)V", (void*) SkPaintGlue::setStrokeJoin}, 859 {"native_getFillPath","(III)Z", (void*) SkPaintGlue::getFillPath}, 860 {"native_setShader","(II)I", (void*) SkPaintGlue::setShader}, 861 {"native_setColorFilter","(II)I", (void*) SkPaintGlue::setColorFilter}, 862 {"native_setXfermode","(II)I", (void*) SkPaintGlue::setXfermode}, 863 {"native_setPathEffect","(II)I", (void*) SkPaintGlue::setPathEffect}, 864 {"native_setMaskFilter","(II)I", (void*) SkPaintGlue::setMaskFilter}, 865 {"native_setTypeface","(II)I", (void*) SkPaintGlue::setTypeface}, 866 {"native_setRasterizer","(II)I", (void*) SkPaintGlue::setRasterizer}, 867 {"native_getTextAlign","(I)I", (void*) SkPaintGlue::getTextAlign}, 868 {"native_setTextAlign","(II)V", (void*) SkPaintGlue::setTextAlign}, 869 {"native_setTextLocale","(ILjava/lang/String;)V", (void*) SkPaintGlue::setTextLocale}, 870 {"getTextSize","()F", (void*) SkPaintGlue::getTextSize}, 871 {"setTextSize","(F)V", (void*) SkPaintGlue::setTextSize}, 872 {"getTextScaleX","()F", (void*) SkPaintGlue::getTextScaleX}, 873 {"setTextScaleX","(F)V", (void*) SkPaintGlue::setTextScaleX}, 874 {"getTextSkewX","()F", (void*) SkPaintGlue::getTextSkewX}, 875 {"setTextSkewX","(F)V", (void*) SkPaintGlue::setTextSkewX}, 876 {"ascent","()F", (void*) SkPaintGlue::ascent}, 877 {"descent","()F", (void*) SkPaintGlue::descent}, 878 {"getFontMetrics", "(Landroid/graphics/Paint$FontMetrics;)F", (void*)SkPaintGlue::getFontMetrics}, 879 {"getFontMetricsInt", "(Landroid/graphics/Paint$FontMetricsInt;)I", (void*)SkPaintGlue::getFontMetricsInt}, 880 {"native_measureText","([CII)F", (void*) SkPaintGlue::measureText_CII}, 881 {"native_measureText","(Ljava/lang/String;)F", (void*) SkPaintGlue::measureText_String}, 882 {"native_measureText","(Ljava/lang/String;II)F", (void*) SkPaintGlue::measureText_StringII}, 883 {"native_breakText","([CIIF[F)I", (void*) SkPaintGlue::breakTextC}, 884 {"native_breakText","(Ljava/lang/String;ZF[F)I", (void*) SkPaintGlue::breakTextS}, 885 {"native_getTextWidths","(I[CII[F)I", (void*) SkPaintGlue::getTextWidths___CII_F}, 886 {"native_getTextWidths","(ILjava/lang/String;II[F)I", (void*) SkPaintGlue::getTextWidths__StringII_F}, 887 {"native_getTextRunAdvances","(I[CIIIII[FII)F", 888 (void*) SkPaintGlue::getTextRunAdvances___CIIIII_FII}, 889 {"native_getTextRunAdvances","(ILjava/lang/String;IIIII[FII)F", 890 (void*) SkPaintGlue::getTextRunAdvances__StringIIIII_FII}, 891 892 893 {"native_getTextGlyphs","(ILjava/lang/String;IIIII[C)I", 894 (void*) SkPaintGlue::getTextGlyphs__StringIIIII_C}, 895 {"native_getTextRunCursor", "(I[CIIIII)I", (void*) SkPaintGlue::getTextRunCursor___C}, 896 {"native_getTextRunCursor", "(ILjava/lang/String;IIIII)I", 897 (void*) SkPaintGlue::getTextRunCursor__String}, 898 {"native_getTextPath","(II[CIIFFI)V", (void*) SkPaintGlue::getTextPath___C}, 899 {"native_getTextPath","(IILjava/lang/String;IIFFI)V", (void*) SkPaintGlue::getTextPath__String}, 900 {"nativeGetStringBounds", "(ILjava/lang/String;IILandroid/graphics/Rect;)V", 901 (void*) SkPaintGlue::getStringBounds }, 902 {"nativeGetCharArrayBounds", "(I[CIILandroid/graphics/Rect;)V", 903 (void*) SkPaintGlue::getCharArrayBounds }, 904 {"nSetShadowLayer", "(FFFI)V", (void*)SkPaintGlue::setShadowLayer} 905 }; 906 907 static jfieldID req_fieldID(jfieldID id) { 908 SkASSERT(id); 909 return id; 910 } 911 912 int register_android_graphics_Paint(JNIEnv* env) { 913 gFontMetrics_class = env->FindClass("android/graphics/Paint$FontMetrics"); 914 SkASSERT(gFontMetrics_class); 915 gFontMetrics_class = (jclass)env->NewGlobalRef(gFontMetrics_class); 916 917 gFontMetrics_fieldID.top = req_fieldID(env->GetFieldID(gFontMetrics_class, "top", "F")); 918 gFontMetrics_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetrics_class, "ascent", "F")); 919 gFontMetrics_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetrics_class, "descent", "F")); 920 gFontMetrics_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetrics_class, "bottom", "F")); 921 gFontMetrics_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetrics_class, "leading", "F")); 922 923 gFontMetricsInt_class = env->FindClass("android/graphics/Paint$FontMetricsInt"); 924 SkASSERT(gFontMetricsInt_class); 925 gFontMetricsInt_class = (jclass)env->NewGlobalRef(gFontMetricsInt_class); 926 927 gFontMetricsInt_fieldID.top = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "top", "I")); 928 gFontMetricsInt_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "ascent", "I")); 929 gFontMetricsInt_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "descent", "I")); 930 gFontMetricsInt_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "bottom", "I")); 931 gFontMetricsInt_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "leading", "I")); 932 933 int result = AndroidRuntime::registerNativeMethods(env, "android/graphics/Paint", methods, 934 sizeof(methods) / sizeof(methods[0])); 935 return result; 936 } 937 938 } 939
