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 26 #include "SkBlurDrawLooper.h" 27 #include "SkColorFilter.h" 28 #include "SkMaskFilter.h" 29 #include "SkRasterizer.h" 30 #include "SkShader.h" 31 #include "SkTypeface.h" 32 #include "SkXfermode.h" 33 #include "unicode/ushape.h" 34 #include "TextLayout.h" 35 36 // temporary for debugging 37 #include <Caches.h> 38 #include <utils/Log.h> 39 40 namespace android { 41 42 struct JMetricsID { 43 jfieldID top; 44 jfieldID ascent; 45 jfieldID descent; 46 jfieldID bottom; 47 jfieldID leading; 48 }; 49 50 static jclass gFontMetrics_class; 51 static JMetricsID gFontMetrics_fieldID; 52 53 static jclass gFontMetricsInt_class; 54 static JMetricsID gFontMetricsInt_fieldID; 55 56 static void defaultSettingsForAndroid(SkPaint* paint) { 57 // utf16 is required for java 58 paint->setTextEncoding(SkPaint::kUTF16_TextEncoding); 59 } 60 61 class SkPaintGlue { 62 public: 63 enum MoveOpt { 64 AFTER, AT_OR_AFTER, BEFORE, AT_OR_BEFORE, AT 65 }; 66 67 static void finalizer(JNIEnv* env, jobject clazz, SkPaint* obj) { 68 delete obj; 69 } 70 71 static SkPaint* init(JNIEnv* env, jobject clazz) { 72 SkPaint* obj = new SkPaint(); 73 defaultSettingsForAndroid(obj); 74 return obj; 75 } 76 77 static SkPaint* intiWithPaint(JNIEnv* env, jobject clazz, SkPaint* paint) { 78 SkPaint* obj = new SkPaint(*paint); 79 return obj; 80 } 81 82 static void reset(JNIEnv* env, jobject clazz, SkPaint* obj) { 83 obj->reset(); 84 defaultSettingsForAndroid(obj); 85 } 86 87 static void assign(JNIEnv* env, jobject clazz, SkPaint* dst, const SkPaint* src) { 88 *dst = *src; 89 } 90 91 static jint getFlags(JNIEnv* env, jobject paint) { 92 NPE_CHECK_RETURN_ZERO(env, paint); 93 return GraphicsJNI::getNativePaint(env, paint)->getFlags(); 94 } 95 96 static void setFlags(JNIEnv* env, jobject paint, jint flags) { 97 NPE_CHECK_RETURN_VOID(env, paint); 98 GraphicsJNI::getNativePaint(env, paint)->setFlags(flags); 99 } 100 101 static jint getHinting(JNIEnv* env, jobject paint) { 102 NPE_CHECK_RETURN_ZERO(env, paint); 103 return GraphicsJNI::getNativePaint(env, paint)->getHinting() 104 == SkPaint::kNo_Hinting ? 0 : 1; 105 } 106 107 static void setHinting(JNIEnv* env, jobject paint, jint mode) { 108 NPE_CHECK_RETURN_VOID(env, paint); 109 GraphicsJNI::getNativePaint(env, paint)->setHinting( 110 mode == 0 ? SkPaint::kNo_Hinting : SkPaint::kSlight_Hinting); 111 } 112 113 static void setAntiAlias(JNIEnv* env, jobject paint, jboolean aa) { 114 NPE_CHECK_RETURN_VOID(env, paint); 115 GraphicsJNI::getNativePaint(env, paint)->setAntiAlias(aa); 116 } 117 118 static void setLinearText(JNIEnv* env, jobject paint, jboolean linearText) { 119 NPE_CHECK_RETURN_VOID(env, paint); 120 GraphicsJNI::getNativePaint(env, paint)->setLinearText(linearText); 121 } 122 123 static void setSubpixelText(JNIEnv* env, jobject paint, jboolean subpixelText) { 124 NPE_CHECK_RETURN_VOID(env, paint); 125 GraphicsJNI::getNativePaint(env, paint)->setSubpixelText(subpixelText); 126 } 127 128 static void setUnderlineText(JNIEnv* env, jobject paint, jboolean underlineText) { 129 NPE_CHECK_RETURN_VOID(env, paint); 130 GraphicsJNI::getNativePaint(env, paint)->setUnderlineText(underlineText); 131 } 132 133 static void setStrikeThruText(JNIEnv* env, jobject paint, jboolean strikeThruText) { 134 NPE_CHECK_RETURN_VOID(env, paint); 135 GraphicsJNI::getNativePaint(env, paint)->setStrikeThruText(strikeThruText); 136 } 137 138 static void setFakeBoldText(JNIEnv* env, jobject paint, jboolean fakeBoldText) { 139 NPE_CHECK_RETURN_VOID(env, paint); 140 GraphicsJNI::getNativePaint(env, paint)->setFakeBoldText(fakeBoldText); 141 } 142 143 static void setFilterBitmap(JNIEnv* env, jobject paint, jboolean filterBitmap) { 144 NPE_CHECK_RETURN_VOID(env, paint); 145 GraphicsJNI::getNativePaint(env, paint)->setFilterBitmap(filterBitmap); 146 } 147 148 static void setDither(JNIEnv* env, jobject paint, jboolean dither) { 149 NPE_CHECK_RETURN_VOID(env, paint); 150 GraphicsJNI::getNativePaint(env, paint)->setDither(dither); 151 } 152 153 static jint getStyle(JNIEnv* env, jobject clazz, SkPaint* obj) { 154 return obj->getStyle(); 155 } 156 157 static void setStyle(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Style style) { 158 obj->setStyle(style); 159 } 160 161 static jint getColor(JNIEnv* env, jobject paint) { 162 NPE_CHECK_RETURN_ZERO(env, paint); 163 return GraphicsJNI::getNativePaint(env, paint)->getColor(); 164 } 165 166 static jint getAlpha(JNIEnv* env, jobject paint) { 167 NPE_CHECK_RETURN_ZERO(env, paint); 168 return GraphicsJNI::getNativePaint(env, paint)->getAlpha(); 169 } 170 171 static void setColor(JNIEnv* env, jobject paint, jint color) { 172 NPE_CHECK_RETURN_VOID(env, paint); 173 GraphicsJNI::getNativePaint(env, paint)->setColor(color); 174 } 175 176 static void setAlpha(JNIEnv* env, jobject paint, jint a) { 177 NPE_CHECK_RETURN_VOID(env, paint); 178 GraphicsJNI::getNativePaint(env, paint)->setAlpha(a); 179 } 180 181 static jfloat getStrokeWidth(JNIEnv* env, jobject paint) { 182 NPE_CHECK_RETURN_ZERO(env, paint); 183 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeWidth()); 184 } 185 186 static void setStrokeWidth(JNIEnv* env, jobject paint, jfloat width) { 187 NPE_CHECK_RETURN_VOID(env, paint); 188 GraphicsJNI::getNativePaint(env, paint)->setStrokeWidth(SkFloatToScalar(width)); 189 } 190 191 static jfloat getStrokeMiter(JNIEnv* env, jobject paint) { 192 NPE_CHECK_RETURN_ZERO(env, paint); 193 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeMiter()); 194 } 195 196 static void setStrokeMiter(JNIEnv* env, jobject paint, jfloat miter) { 197 NPE_CHECK_RETURN_VOID(env, paint); 198 GraphicsJNI::getNativePaint(env, paint)->setStrokeMiter(SkFloatToScalar(miter)); 199 } 200 201 static jint getStrokeCap(JNIEnv* env, jobject clazz, SkPaint* obj) { 202 return obj->getStrokeCap(); 203 } 204 205 static void setStrokeCap(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Cap cap) { 206 obj->setStrokeCap(cap); 207 } 208 209 static jint getStrokeJoin(JNIEnv* env, jobject clazz, SkPaint* obj) { 210 return obj->getStrokeJoin(); 211 } 212 213 static void setStrokeJoin(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Join join) { 214 obj->setStrokeJoin(join); 215 } 216 217 static jboolean getFillPath(JNIEnv* env, jobject clazz, SkPaint* obj, SkPath* src, SkPath* dst) { 218 return obj->getFillPath(*src, dst); 219 } 220 221 static SkShader* setShader(JNIEnv* env, jobject clazz, SkPaint* obj, SkShader* shader) { 222 return obj->setShader(shader); 223 } 224 225 static SkColorFilter* setColorFilter(JNIEnv* env, jobject clazz, SkPaint* obj, SkColorFilter* filter) { 226 return obj->setColorFilter(filter); 227 } 228 229 static SkXfermode* setXfermode(JNIEnv* env, jobject clazz, SkPaint* obj, SkXfermode* xfermode) { 230 return obj->setXfermode(xfermode); 231 } 232 233 static SkPathEffect* setPathEffect(JNIEnv* env, jobject clazz, SkPaint* obj, SkPathEffect* effect) { 234 return obj->setPathEffect(effect); 235 } 236 237 static SkMaskFilter* setMaskFilter(JNIEnv* env, jobject clazz, SkPaint* obj, SkMaskFilter* maskfilter) { 238 return obj->setMaskFilter(maskfilter); 239 } 240 241 static SkTypeface* setTypeface(JNIEnv* env, jobject clazz, SkPaint* obj, SkTypeface* typeface) { 242 return obj->setTypeface(typeface); 243 } 244 245 static SkRasterizer* setRasterizer(JNIEnv* env, jobject clazz, SkPaint* obj, SkRasterizer* rasterizer) { 246 return obj->setRasterizer(rasterizer); 247 } 248 249 static jint getTextAlign(JNIEnv* env, jobject clazz, SkPaint* obj) { 250 return obj->getTextAlign(); 251 } 252 253 static void setTextAlign(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Align align) { 254 obj->setTextAlign(align); 255 } 256 257 static jfloat getTextSize(JNIEnv* env, jobject paint) { 258 NPE_CHECK_RETURN_ZERO(env, paint); 259 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSize()); 260 } 261 262 static void setTextSize(JNIEnv* env, jobject paint, jfloat textSize) { 263 NPE_CHECK_RETURN_VOID(env, paint); 264 GraphicsJNI::getNativePaint(env, paint)->setTextSize(SkFloatToScalar(textSize)); 265 } 266 267 static jfloat getTextScaleX(JNIEnv* env, jobject paint) { 268 NPE_CHECK_RETURN_ZERO(env, paint); 269 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextScaleX()); 270 } 271 272 static void setTextScaleX(JNIEnv* env, jobject paint, jfloat scaleX) { 273 NPE_CHECK_RETURN_VOID(env, paint); 274 GraphicsJNI::getNativePaint(env, paint)->setTextScaleX(SkFloatToScalar(scaleX)); 275 } 276 277 static jfloat getTextSkewX(JNIEnv* env, jobject paint) { 278 NPE_CHECK_RETURN_ZERO(env, paint); 279 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSkewX()); 280 } 281 282 static void setTextSkewX(JNIEnv* env, jobject paint, jfloat skewX) { 283 NPE_CHECK_RETURN_VOID(env, paint); 284 GraphicsJNI::getNativePaint(env, paint)->setTextSkewX(SkFloatToScalar(skewX)); 285 } 286 287 static jfloat ascent(JNIEnv* env, jobject paint) { 288 NPE_CHECK_RETURN_ZERO(env, paint); 289 SkPaint::FontMetrics metrics; 290 (void)GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 291 return SkScalarToFloat(metrics.fAscent); 292 } 293 294 static jfloat descent(JNIEnv* env, jobject paint) { 295 NPE_CHECK_RETURN_ZERO(env, paint); 296 SkPaint::FontMetrics metrics; 297 (void)GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 298 return SkScalarToFloat(metrics.fDescent); 299 } 300 301 static jfloat getFontMetrics(JNIEnv* env, jobject paint, jobject metricsObj) { 302 NPE_CHECK_RETURN_ZERO(env, paint); 303 SkPaint::FontMetrics metrics; 304 SkScalar spacing = GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 305 306 if (metricsObj) { 307 SkASSERT(env->IsInstanceOf(metricsObj, gFontMetrics_class)); 308 env->SetFloatField(metricsObj, gFontMetrics_fieldID.top, SkScalarToFloat(metrics.fTop)); 309 env->SetFloatField(metricsObj, gFontMetrics_fieldID.ascent, SkScalarToFloat(metrics.fAscent)); 310 env->SetFloatField(metricsObj, gFontMetrics_fieldID.descent, SkScalarToFloat(metrics.fDescent)); 311 env->SetFloatField(metricsObj, gFontMetrics_fieldID.bottom, SkScalarToFloat(metrics.fBottom)); 312 env->SetFloatField(metricsObj, gFontMetrics_fieldID.leading, SkScalarToFloat(metrics.fLeading)); 313 } 314 return SkScalarToFloat(spacing); 315 } 316 317 static jint getFontMetricsInt(JNIEnv* env, jobject paint, jobject metricsObj) { 318 NPE_CHECK_RETURN_ZERO(env, paint); 319 SkPaint::FontMetrics metrics; 320 321 GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 322 int ascent = SkScalarRound(metrics.fAscent); 323 int descent = SkScalarRound(metrics.fDescent); 324 int leading = SkScalarRound(metrics.fLeading); 325 326 if (metricsObj) { 327 SkASSERT(env->IsInstanceOf(metricsObj, gFontMetricsInt_class)); 328 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.top, SkScalarFloor(metrics.fTop)); 329 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.ascent, ascent); 330 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.descent, descent); 331 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.bottom, SkScalarCeil(metrics.fBottom)); 332 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.leading, leading); 333 } 334 return descent - ascent + leading; 335 } 336 337 static jfloat measureText_CII(JNIEnv* env, jobject jpaint, jcharArray text, int index, int count) { 338 NPE_CHECK_RETURN_ZERO(env, jpaint); 339 NPE_CHECK_RETURN_ZERO(env, text); 340 341 size_t textLength = env->GetArrayLength(text); 342 if ((index | count) < 0 || (size_t)(index + count) > textLength) { 343 doThrowAIOOBE(env); 344 return 0; 345 } 346 if (count == 0) { 347 return 0; 348 } 349 350 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 351 const jchar* textArray = env->GetCharArrayElements(text, NULL); 352 jfloat result = 0; 353 #if RTL_USE_HARFBUZZ 354 TextLayout::getTextRunAdvances(paint, textArray, index, count, textLength, 355 paint->getFlags(), NULL /* dont need all advances */, &result); 356 #else 357 // we double count, since measureText wants a byteLength 358 SkScalar width = paint->measureText(textArray + index, count << 1); 359 result = SkScalarToFloat(width); 360 #endif 361 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); 362 return result; 363 } 364 365 static jfloat measureText_StringII(JNIEnv* env, jobject jpaint, jstring text, int start, int end) { 366 NPE_CHECK_RETURN_ZERO(env, jpaint); 367 NPE_CHECK_RETURN_ZERO(env, text); 368 369 size_t textLength = env->GetStringLength(text); 370 int count = end - start; 371 if ((start | count) < 0 || (size_t)end > textLength) { 372 doThrowAIOOBE(env); 373 return 0; 374 } 375 if (count == 0) { 376 return 0; 377 } 378 379 const jchar* textArray = env->GetStringChars(text, NULL); 380 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 381 jfloat width = 0; 382 383 #if RTL_USE_HARFBUZZ 384 TextLayout::getTextRunAdvances(paint, textArray, start, count, textLength, 385 paint->getFlags(), NULL /* dont need all advances */, &width); 386 #else 387 388 width = SkScalarToFloat(paint->measureText(textArray + start, count << 1)); 389 #endif 390 env->ReleaseStringChars(text, textArray); 391 return width; 392 } 393 394 static jfloat measureText_String(JNIEnv* env, jobject jpaint, jstring text) { 395 NPE_CHECK_RETURN_ZERO(env, jpaint); 396 NPE_CHECK_RETURN_ZERO(env, text); 397 398 size_t textLength = env->GetStringLength(text); 399 if (textLength == 0) { 400 return 0; 401 } 402 403 const jchar* textArray = env->GetStringChars(text, NULL); 404 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 405 jfloat width = 0; 406 407 #if RTL_USE_HARFBUZZ 408 TextLayout::getTextRunAdvances(paint, textArray, 0, textLength, textLength, 409 paint->getFlags(), NULL /* dont need all advances */, &width); 410 #else 411 width = SkScalarToFloat(paint->measureText(textArray, textLength << 1)); 412 #endif 413 env->ReleaseStringChars(text, textArray); 414 return width; 415 } 416 417 static int dotextwidths(JNIEnv* env, SkPaint* paint, const jchar text[], int count, jfloatArray widths) { 418 NPE_CHECK_RETURN_ZERO(env, paint); 419 NPE_CHECK_RETURN_ZERO(env, text); 420 421 if (count < 0 || !widths) { 422 doThrowAIOOBE(env); 423 return 0; 424 } 425 if (count == 0) { 426 return 0; 427 } 428 size_t widthsLength = env->GetArrayLength(widths); 429 if ((size_t)count > widthsLength) { 430 doThrowAIOOBE(env); 431 return 0; 432 } 433 434 AutoJavaFloatArray autoWidths(env, widths, count); 435 jfloat* widthsArray = autoWidths.ptr(); 436 437 #if RTL_USE_HARFBUZZ 438 TextLayout::getTextRunAdvances(paint, text, 0, count, count, 439 paint->getFlags(), widthsArray, NULL /* dont need totalAdvance */); 440 #else 441 SkScalar* scalarArray = (SkScalar*)widthsArray; 442 443 count = paint->getTextWidths(text, count << 1, scalarArray); 444 for (int i = 0; i < count; i++) { 445 widthsArray[i] = SkScalarToFloat(scalarArray[i]); 446 } 447 #endif 448 return count; 449 } 450 451 static int getTextWidths___CII_F(JNIEnv* env, jobject clazz, SkPaint* paint, jcharArray text, int index, int count, jfloatArray widths) { 452 const jchar* textArray = env->GetCharArrayElements(text, NULL); 453 count = dotextwidths(env, paint, textArray + index, count, widths); 454 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 455 JNI_ABORT); 456 return count; 457 } 458 459 static int getTextWidths__StringII_F(JNIEnv* env, jobject clazz, SkPaint* paint, jstring text, 460 int start, int end, jfloatArray widths) { 461 const jchar* textArray = env->GetStringChars(text, NULL); 462 int count = dotextwidths(env, paint, textArray + start, end - start, widths); 463 env->ReleaseStringChars(text, textArray); 464 return count; 465 } 466 467 static int doTextGlyphs(JNIEnv* env, SkPaint* paint, const jchar* text, jint start, jint count, 468 jint contextCount, jint flags, jcharArray glyphs) { 469 NPE_CHECK_RETURN_ZERO(env, paint); 470 NPE_CHECK_RETURN_ZERO(env, text); 471 472 if ((start | count | contextCount) < 0 || contextCount < count || !glyphs) { 473 doThrowAIOOBE(env); 474 return 0; 475 } 476 if (count == 0) { 477 return 0; 478 } 479 size_t glypthsLength = env->GetArrayLength(glyphs); 480 if ((size_t)count > glypthsLength) { 481 doThrowAIOOBE(env); 482 return 0; 483 } 484 485 jchar* glyphsArray = env->GetCharArrayElements(glyphs, NULL); 486 487 TextLayoutCacheValue value; 488 value.computeValues(paint, text, start, count, contextCount, flags); 489 const jchar* shapedGlyphs = value.getGlyphs(); 490 size_t glyphsCount = value.getGlyphsCount(); 491 memcpy(glyphsArray, shapedGlyphs, sizeof(jchar) * glyphsCount); 492 493 env->ReleaseCharArrayElements(glyphs, glyphsArray, JNI_ABORT); 494 return glyphsCount; 495 } 496 497 static int getTextGlyphs__StringIIIII_C(JNIEnv* env, jobject clazz, SkPaint* paint, 498 jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags, 499 jcharArray glyphs) { 500 const jchar* textArray = env->GetStringChars(text, NULL); 501 int count = doTextGlyphs(env, paint, textArray + contextStart, start - contextStart, 502 end - start, contextEnd - contextStart, flags, glyphs); 503 env->ReleaseStringChars(text, textArray); 504 return count; 505 } 506 507 static jfloat doTextRunAdvances(JNIEnv *env, SkPaint *paint, const jchar *text, 508 jint start, jint count, jint contextCount, jint flags, 509 jfloatArray advances, jint advancesIndex) { 510 NPE_CHECK_RETURN_ZERO(env, paint); 511 NPE_CHECK_RETURN_ZERO(env, text); 512 513 if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) { 514 doThrowAIOOBE(env); 515 return 0; 516 } 517 if (count == 0) { 518 return 0; 519 } 520 if (advances) { 521 size_t advancesLength = env->GetArrayLength(advances); 522 if ((size_t)count > advancesLength) { 523 doThrowAIOOBE(env); 524 return 0; 525 } 526 } 527 jfloat advancesArray[count]; 528 jfloat totalAdvance = 0; 529 530 TextLayout::getTextRunAdvances(paint, text, start, count, contextCount, flags, 531 advancesArray, &totalAdvance); 532 533 if (advances != NULL) { 534 env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray); 535 } 536 return totalAdvance; 537 } 538 539 static jfloat doTextRunAdvancesICU(JNIEnv *env, SkPaint *paint, const jchar *text, 540 jint start, jint count, jint contextCount, jint flags, 541 jfloatArray advances, jint advancesIndex) { 542 NPE_CHECK_RETURN_ZERO(env, paint); 543 NPE_CHECK_RETURN_ZERO(env, text); 544 545 if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) { 546 doThrowAIOOBE(env); 547 return 0; 548 } 549 if (count == 0) { 550 return 0; 551 } 552 if (advances) { 553 size_t advancesLength = env->GetArrayLength(advances); 554 if ((size_t)count > advancesLength) { 555 doThrowAIOOBE(env); 556 return 0; 557 } 558 } 559 560 jfloat advancesArray[count]; 561 jfloat totalAdvance = 0; 562 563 TextLayout::getTextRunAdvancesICU(paint, text, start, count, contextCount, flags, 564 advancesArray, totalAdvance); 565 566 if (advances != NULL) { 567 env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray); 568 } 569 return totalAdvance; 570 } 571 572 static float getTextRunAdvances___CIIIII_FII(JNIEnv* env, jobject clazz, SkPaint* paint, 573 jcharArray text, jint index, jint count, jint contextIndex, jint contextCount, 574 jint flags, jfloatArray advances, jint advancesIndex, jint reserved) { 575 jchar* textArray = env->GetCharArrayElements(text, NULL); 576 jfloat result = (reserved == 0) ? 577 doTextRunAdvances(env, paint, textArray + contextIndex, index - contextIndex, 578 count, contextCount, flags, advances, advancesIndex) : 579 doTextRunAdvancesICU(env, paint, textArray + contextIndex, index - contextIndex, 580 count, contextCount, flags, advances, advancesIndex); 581 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 582 return result; 583 } 584 585 static float getTextRunAdvances__StringIIIII_FII(JNIEnv* env, jobject clazz, SkPaint* paint, 586 jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags, 587 jfloatArray advances, jint advancesIndex, jint reserved) { 588 const jchar* textArray = env->GetStringChars(text, NULL); 589 jfloat result = (reserved == 0) ? 590 doTextRunAdvances(env, paint, textArray + contextStart, start - contextStart, 591 end - start, contextEnd - contextStart, flags, advances, advancesIndex) : 592 doTextRunAdvancesICU(env, paint, textArray + contextStart, start - contextStart, 593 end - start, contextEnd - contextStart, flags, advances, advancesIndex); 594 env->ReleaseStringChars(text, textArray); 595 return result; 596 } 597 598 static jint doTextRunCursor(JNIEnv *env, SkPaint* paint, const jchar *text, jint start, 599 jint count, jint flags, jint offset, jint opt) { 600 #if RTL_USE_HARFBUZZ 601 jfloat scalarArray[count]; 602 603 TextLayout::getTextRunAdvances(paint, text, start, count, count, flags, 604 scalarArray, NULL /* dont need totalAdvance */); 605 #else 606 SkScalar scalarArray[count]; 607 jchar buffer[count]; 608 609 // this is where we'd call harfbuzz 610 // for now we just use ushape.c and widths returned from skia 611 612 int widths; 613 if (flags & 0x1) { // rtl, call arabic shaping in case 614 UErrorCode status = U_ZERO_ERROR; 615 // Use fixed length since we need to keep start and count valid 616 u_shapeArabic(text + start, count, buffer, count, 617 U_SHAPE_LENGTH_FIXED_SPACES_NEAR | U_SHAPE_TEXT_DIRECTION_LOGICAL | 618 U_SHAPE_LETTERS_SHAPE | U_SHAPE_X_LAMALEF_SUB_ALTERNATE, &status); 619 // we shouldn't fail unless there's an out of memory condition, 620 // in which case we're hosed anyway 621 for (int i = 0; i < count; ++i) { 622 if (buffer[i] == 0xffff) { 623 buffer[i] = 0x200b; // zero-width-space for skia 624 } 625 } 626 widths = paint->getTextWidths(buffer, count << 1, scalarArray); 627 } else { 628 widths = paint->getTextWidths(text + start, count << 1, scalarArray); 629 } 630 631 if (widths < count) { 632 // Skia operates on code points, not code units, so surrogate pairs return only one 633 // value. Expand the result so we have one value per UTF-16 code unit. 634 635 // Note, skia's getTextWidth gets confused if it encounters a surrogate pair, 636 // leaving the remaining widths zero. Not nice. 637 const jchar *chars = text + start; 638 for (int i = count, p = widths - 1; --i > p;) { 639 if (chars[i] >= 0xdc00 && chars[i] < 0xe000 && 640 chars[i-1] >= 0xd800 && chars[i-1] < 0xdc00) { 641 scalarArray[i] = 0; 642 } else { 643 scalarArray[i] = scalarArray[--p]; 644 } 645 } 646 } 647 #endif 648 jint pos = offset - start; 649 switch (opt) { 650 case AFTER: 651 if (pos < count) { 652 pos += 1; 653 } 654 // fall through 655 case AT_OR_AFTER: 656 while (pos < count && scalarArray[pos] == 0) { 657 ++pos; 658 } 659 break; 660 case BEFORE: 661 if (pos > 0) { 662 --pos; 663 } 664 // fall through 665 case AT_OR_BEFORE: 666 while (pos > 0 && scalarArray[pos] == 0) { 667 --pos; 668 } 669 break; 670 case AT: 671 default: 672 if (scalarArray[pos] == 0) { 673 pos = -1; 674 } 675 break; 676 } 677 678 if (pos != -1) { 679 pos += start; 680 } 681 682 return pos; 683 } 684 685 static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, SkPaint* paint, jcharArray text, 686 jint contextStart, jint contextCount, jint flags, jint offset, jint cursorOpt) { 687 jchar* textArray = env->GetCharArrayElements(text, NULL); 688 jint result = doTextRunCursor(env, paint, textArray, contextStart, contextCount, flags, 689 offset, cursorOpt); 690 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 691 return result; 692 } 693 694 static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, SkPaint* paint, jstring text, 695 jint contextStart, jint contextEnd, jint flags, jint offset, jint cursorOpt) { 696 const jchar* textArray = env->GetStringChars(text, NULL); 697 jint result = doTextRunCursor(env, paint, textArray, contextStart, 698 contextEnd - contextStart, flags, offset, cursorOpt); 699 env->ReleaseStringChars(text, textArray); 700 return result; 701 } 702 703 static void getTextPath(JNIEnv* env, SkPaint* paint, const jchar* text, jint count, 704 jint bidiFlags, jfloat x, jfloat y, SkPath *path) { 705 TextLayout::getTextPath(paint, text, count, bidiFlags, x, y, path); 706 } 707 708 static void getTextPath___C(JNIEnv* env, jobject clazz, SkPaint* paint, jint bidiFlags, 709 jcharArray text, int index, int count, jfloat x, jfloat y, SkPath* path) { 710 const jchar* textArray = env->GetCharArrayElements(text, NULL); 711 getTextPath(env, paint, textArray + index, count, bidiFlags, x, y, path); 712 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); 713 } 714 715 static void getTextPath__String(JNIEnv* env, jobject clazz, SkPaint* paint, jint bidiFlags, 716 jstring text, int start, int end, jfloat x, jfloat y, SkPath* path) { 717 const jchar* textArray = env->GetStringChars(text, NULL); 718 getTextPath(env, paint, textArray + start, end - start, bidiFlags, x, y, path); 719 env->ReleaseStringChars(text, textArray); 720 } 721 722 static void setShadowLayer(JNIEnv* env, jobject jpaint, jfloat radius, 723 jfloat dx, jfloat dy, int color) { 724 NPE_CHECK_RETURN_VOID(env, jpaint); 725 726 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 727 if (radius <= 0) { 728 paint->setLooper(NULL); 729 } 730 else { 731 paint->setLooper(new SkBlurDrawLooper(SkFloatToScalar(radius), 732 SkFloatToScalar(dx), 733 SkFloatToScalar(dy), 734 (SkColor)color))->unref(); 735 } 736 } 737 738 static int breakText(JNIEnv* env, const SkPaint& paint, const jchar text[], 739 int count, float maxWidth, jfloatArray jmeasured, 740 SkPaint::TextBufferDirection tbd) { 741 SkASSERT(paint.getTextEncoding() == SkPaint::kUTF16_TextEncoding); 742 743 SkScalar measured; 744 size_t bytes = paint.breakText(text, count << 1, 745 SkFloatToScalar(maxWidth), &measured, tbd); 746 SkASSERT((bytes & 1) == 0); 747 748 if (jmeasured && env->GetArrayLength(jmeasured) > 0) { 749 AutoJavaFloatArray autoMeasured(env, jmeasured, 1); 750 jfloat* array = autoMeasured.ptr(); 751 array[0] = SkScalarToFloat(measured); 752 } 753 return bytes >> 1; 754 } 755 756 static int breakTextC(JNIEnv* env, jobject jpaint, jcharArray jtext, 757 int index, int count, float maxWidth, jfloatArray jmeasuredWidth) { 758 NPE_CHECK_RETURN_ZERO(env, jpaint); 759 NPE_CHECK_RETURN_ZERO(env, jtext); 760 761 SkPaint::TextBufferDirection tbd; 762 if (count < 0) { 763 tbd = SkPaint::kBackward_TextBufferDirection; 764 count = -count; 765 } 766 else { 767 tbd = SkPaint::kForward_TextBufferDirection; 768 } 769 770 if ((index < 0) || (index + count > env->GetArrayLength(jtext))) { 771 doThrowAIOOBE(env); 772 return 0; 773 } 774 775 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 776 const jchar* text = env->GetCharArrayElements(jtext, NULL); 777 count = breakText(env, *paint, text + index, count, maxWidth, 778 jmeasuredWidth, tbd); 779 env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text), 780 JNI_ABORT); 781 return count; 782 } 783 784 static int breakTextS(JNIEnv* env, jobject jpaint, jstring jtext, 785 bool forwards, float maxWidth, jfloatArray jmeasuredWidth) { 786 NPE_CHECK_RETURN_ZERO(env, jpaint); 787 NPE_CHECK_RETURN_ZERO(env, jtext); 788 789 SkPaint::TextBufferDirection tbd = forwards ? 790 SkPaint::kForward_TextBufferDirection : 791 SkPaint::kBackward_TextBufferDirection; 792 793 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 794 int count = env->GetStringLength(jtext); 795 const jchar* text = env->GetStringChars(jtext, NULL); 796 count = breakText(env, *paint, text, count, maxWidth, 797 jmeasuredWidth, tbd); 798 env->ReleaseStringChars(jtext, text); 799 return count; 800 } 801 802 static void doTextBounds(JNIEnv* env, const jchar* text, int count, 803 jobject bounds, const SkPaint& paint) 804 { 805 SkRect r; 806 SkIRect ir; 807 808 paint.measureText(text, count << 1, &r); 809 r.roundOut(&ir); 810 GraphicsJNI::irect_to_jrect(ir, env, bounds); 811 } 812 813 static void getStringBounds(JNIEnv* env, jobject, const SkPaint* paint, 814 jstring text, int start, int end, jobject bounds) 815 { 816 const jchar* textArray = env->GetStringChars(text, NULL); 817 doTextBounds(env, textArray + start, end - start, bounds, *paint); 818 env->ReleaseStringChars(text, textArray); 819 } 820 821 static void getCharArrayBounds(JNIEnv* env, jobject, const SkPaint* paint, 822 jcharArray text, int index, int count, jobject bounds) 823 { 824 const jchar* textArray = env->GetCharArrayElements(text, NULL); 825 doTextBounds(env, textArray + index, count, bounds, *paint); 826 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 827 JNI_ABORT); 828 } 829 830 }; 831 832 static JNINativeMethod methods[] = { 833 {"finalizer", "(I)V", (void*) SkPaintGlue::finalizer}, 834 {"native_init","()I", (void*) SkPaintGlue::init}, 835 {"native_initWithPaint","(I)I", (void*) SkPaintGlue::intiWithPaint}, 836 {"native_reset","(I)V", (void*) SkPaintGlue::reset}, 837 {"native_set","(II)V", (void*) SkPaintGlue::assign}, 838 {"getFlags","()I", (void*) SkPaintGlue::getFlags}, 839 {"setFlags","(I)V", (void*) SkPaintGlue::setFlags}, 840 {"getHinting","()I", (void*) SkPaintGlue::getHinting}, 841 {"setHinting","(I)V", (void*) SkPaintGlue::setHinting}, 842 {"setAntiAlias","(Z)V", (void*) SkPaintGlue::setAntiAlias}, 843 {"setSubpixelText","(Z)V", (void*) SkPaintGlue::setSubpixelText}, 844 {"setLinearText","(Z)V", (void*) SkPaintGlue::setLinearText}, 845 {"setUnderlineText","(Z)V", (void*) SkPaintGlue::setUnderlineText}, 846 {"setStrikeThruText","(Z)V", (void*) SkPaintGlue::setStrikeThruText}, 847 {"setFakeBoldText","(Z)V", (void*) SkPaintGlue::setFakeBoldText}, 848 {"setFilterBitmap","(Z)V", (void*) SkPaintGlue::setFilterBitmap}, 849 {"setDither","(Z)V", (void*) SkPaintGlue::setDither}, 850 {"native_getStyle","(I)I", (void*) SkPaintGlue::getStyle}, 851 {"native_setStyle","(II)V", (void*) SkPaintGlue::setStyle}, 852 {"getColor","()I", (void*) SkPaintGlue::getColor}, 853 {"setColor","(I)V", (void*) SkPaintGlue::setColor}, 854 {"getAlpha","()I", (void*) SkPaintGlue::getAlpha}, 855 {"setAlpha","(I)V", (void*) SkPaintGlue::setAlpha}, 856 {"getStrokeWidth","()F", (void*) SkPaintGlue::getStrokeWidth}, 857 {"setStrokeWidth","(F)V", (void*) SkPaintGlue::setStrokeWidth}, 858 {"getStrokeMiter","()F", (void*) SkPaintGlue::getStrokeMiter}, 859 {"setStrokeMiter","(F)V", (void*) SkPaintGlue::setStrokeMiter}, 860 {"native_getStrokeCap","(I)I", (void*) SkPaintGlue::getStrokeCap}, 861 {"native_setStrokeCap","(II)V", (void*) SkPaintGlue::setStrokeCap}, 862 {"native_getStrokeJoin","(I)I", (void*) SkPaintGlue::getStrokeJoin}, 863 {"native_setStrokeJoin","(II)V", (void*) SkPaintGlue::setStrokeJoin}, 864 {"native_getFillPath","(III)Z", (void*) SkPaintGlue::getFillPath}, 865 {"native_setShader","(II)I", (void*) SkPaintGlue::setShader}, 866 {"native_setColorFilter","(II)I", (void*) SkPaintGlue::setColorFilter}, 867 {"native_setXfermode","(II)I", (void*) SkPaintGlue::setXfermode}, 868 {"native_setPathEffect","(II)I", (void*) SkPaintGlue::setPathEffect}, 869 {"native_setMaskFilter","(II)I", (void*) SkPaintGlue::setMaskFilter}, 870 {"native_setTypeface","(II)I", (void*) SkPaintGlue::setTypeface}, 871 {"native_setRasterizer","(II)I", (void*) SkPaintGlue::setRasterizer}, 872 {"native_getTextAlign","(I)I", (void*) SkPaintGlue::getTextAlign}, 873 {"native_setTextAlign","(II)V", (void*) SkPaintGlue::setTextAlign}, 874 {"getTextSize","()F", (void*) SkPaintGlue::getTextSize}, 875 {"setTextSize","(F)V", (void*) SkPaintGlue::setTextSize}, 876 {"getTextScaleX","()F", (void*) SkPaintGlue::getTextScaleX}, 877 {"setTextScaleX","(F)V", (void*) SkPaintGlue::setTextScaleX}, 878 {"getTextSkewX","()F", (void*) SkPaintGlue::getTextSkewX}, 879 {"setTextSkewX","(F)V", (void*) SkPaintGlue::setTextSkewX}, 880 {"ascent","()F", (void*) SkPaintGlue::ascent}, 881 {"descent","()F", (void*) SkPaintGlue::descent}, 882 {"getFontMetrics", "(Landroid/graphics/Paint$FontMetrics;)F", (void*)SkPaintGlue::getFontMetrics}, 883 {"getFontMetricsInt", "(Landroid/graphics/Paint$FontMetricsInt;)I", (void*)SkPaintGlue::getFontMetricsInt}, 884 {"native_measureText","([CII)F", (void*) SkPaintGlue::measureText_CII}, 885 {"native_measureText","(Ljava/lang/String;)F", (void*) SkPaintGlue::measureText_String}, 886 {"native_measureText","(Ljava/lang/String;II)F", (void*) SkPaintGlue::measureText_StringII}, 887 {"native_breakText","([CIIF[F)I", (void*) SkPaintGlue::breakTextC}, 888 {"native_breakText","(Ljava/lang/String;ZF[F)I", (void*) SkPaintGlue::breakTextS}, 889 {"native_getTextWidths","(I[CII[F)I", (void*) SkPaintGlue::getTextWidths___CII_F}, 890 {"native_getTextWidths","(ILjava/lang/String;II[F)I", (void*) SkPaintGlue::getTextWidths__StringII_F}, 891 {"native_getTextRunAdvances","(I[CIIIII[FII)F", 892 (void*) SkPaintGlue::getTextRunAdvances___CIIIII_FII}, 893 {"native_getTextRunAdvances","(ILjava/lang/String;IIIII[FII)F", 894 (void*) SkPaintGlue::getTextRunAdvances__StringIIIII_FII}, 895 896 897 {"native_getTextGlyphs","(ILjava/lang/String;IIIII[C)I", 898 (void*) SkPaintGlue::getTextGlyphs__StringIIIII_C}, 899 {"native_getTextRunCursor", "(I[CIIIII)I", (void*) SkPaintGlue::getTextRunCursor___C}, 900 {"native_getTextRunCursor", "(ILjava/lang/String;IIIII)I", 901 (void*) SkPaintGlue::getTextRunCursor__String}, 902 {"native_getTextPath","(II[CIIFFI)V", (void*) SkPaintGlue::getTextPath___C}, 903 {"native_getTextPath","(IILjava/lang/String;IIFFI)V", (void*) SkPaintGlue::getTextPath__String}, 904 {"nativeGetStringBounds", "(ILjava/lang/String;IILandroid/graphics/Rect;)V", 905 (void*) SkPaintGlue::getStringBounds }, 906 {"nativeGetCharArrayBounds", "(I[CIILandroid/graphics/Rect;)V", 907 (void*) SkPaintGlue::getCharArrayBounds }, 908 {"nSetShadowLayer", "(FFFI)V", (void*)SkPaintGlue::setShadowLayer} 909 }; 910 911 static jfieldID req_fieldID(jfieldID id) { 912 SkASSERT(id); 913 return id; 914 } 915 916 int register_android_graphics_Paint(JNIEnv* env) { 917 gFontMetrics_class = env->FindClass("android/graphics/Paint$FontMetrics"); 918 SkASSERT(gFontMetrics_class); 919 gFontMetrics_class = (jclass)env->NewGlobalRef(gFontMetrics_class); 920 921 gFontMetrics_fieldID.top = req_fieldID(env->GetFieldID(gFontMetrics_class, "top", "F")); 922 gFontMetrics_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetrics_class, "ascent", "F")); 923 gFontMetrics_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetrics_class, "descent", "F")); 924 gFontMetrics_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetrics_class, "bottom", "F")); 925 gFontMetrics_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetrics_class, "leading", "F")); 926 927 gFontMetricsInt_class = env->FindClass("android/graphics/Paint$FontMetricsInt"); 928 SkASSERT(gFontMetricsInt_class); 929 gFontMetricsInt_class = (jclass)env->NewGlobalRef(gFontMetricsInt_class); 930 931 gFontMetricsInt_fieldID.top = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "top", "I")); 932 gFontMetricsInt_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "ascent", "I")); 933 gFontMetricsInt_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "descent", "I")); 934 gFontMetricsInt_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "bottom", "I")); 935 gFontMetricsInt_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "leading", "I")); 936 937 int result = AndroidRuntime::registerNativeMethods(env, "android/graphics/Paint", methods, 938 sizeof(methods) / sizeof(methods[0])); 939 return result; 940 } 941 942 } 943
