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 // GlyphID encoding is required because we are using Harfbuzz shaping 58 paint->setTextEncoding(SkPaint::kGlyphID_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 void setTextLocale(JNIEnv* env, jobject clazz, SkPaint* obj, jstring locale) { 258 const char* localeArray = env->GetStringUTFChars(locale, NULL); 259 SkString skLocale(localeArray); 260 obj->setTextLocale(skLocale); 261 env->ReleaseStringUTFChars(locale, localeArray); 262 } 263 264 static jfloat getTextSize(JNIEnv* env, jobject paint) { 265 NPE_CHECK_RETURN_ZERO(env, paint); 266 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSize()); 267 } 268 269 static void setTextSize(JNIEnv* env, jobject paint, jfloat textSize) { 270 NPE_CHECK_RETURN_VOID(env, paint); 271 GraphicsJNI::getNativePaint(env, paint)->setTextSize(SkFloatToScalar(textSize)); 272 } 273 274 static jfloat getTextScaleX(JNIEnv* env, jobject paint) { 275 NPE_CHECK_RETURN_ZERO(env, paint); 276 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextScaleX()); 277 } 278 279 static void setTextScaleX(JNIEnv* env, jobject paint, jfloat scaleX) { 280 NPE_CHECK_RETURN_VOID(env, paint); 281 GraphicsJNI::getNativePaint(env, paint)->setTextScaleX(SkFloatToScalar(scaleX)); 282 } 283 284 static jfloat getTextSkewX(JNIEnv* env, jobject paint) { 285 NPE_CHECK_RETURN_ZERO(env, paint); 286 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSkewX()); 287 } 288 289 static void setTextSkewX(JNIEnv* env, jobject paint, jfloat skewX) { 290 NPE_CHECK_RETURN_VOID(env, paint); 291 GraphicsJNI::getNativePaint(env, paint)->setTextSkewX(SkFloatToScalar(skewX)); 292 } 293 294 static jfloat ascent(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.fAscent); 299 } 300 301 static jfloat descent(JNIEnv* env, jobject paint) { 302 NPE_CHECK_RETURN_ZERO(env, paint); 303 SkPaint::FontMetrics metrics; 304 (void)GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 305 return SkScalarToFloat(metrics.fDescent); 306 } 307 308 static jfloat getFontMetrics(JNIEnv* env, jobject paint, jobject metricsObj) { 309 NPE_CHECK_RETURN_ZERO(env, paint); 310 SkPaint::FontMetrics metrics; 311 SkScalar spacing = GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 312 313 if (metricsObj) { 314 SkASSERT(env->IsInstanceOf(metricsObj, gFontMetrics_class)); 315 env->SetFloatField(metricsObj, gFontMetrics_fieldID.top, SkScalarToFloat(metrics.fTop)); 316 env->SetFloatField(metricsObj, gFontMetrics_fieldID.ascent, SkScalarToFloat(metrics.fAscent)); 317 env->SetFloatField(metricsObj, gFontMetrics_fieldID.descent, SkScalarToFloat(metrics.fDescent)); 318 env->SetFloatField(metricsObj, gFontMetrics_fieldID.bottom, SkScalarToFloat(metrics.fBottom)); 319 env->SetFloatField(metricsObj, gFontMetrics_fieldID.leading, SkScalarToFloat(metrics.fLeading)); 320 } 321 return SkScalarToFloat(spacing); 322 } 323 324 static jint getFontMetricsInt(JNIEnv* env, jobject paint, jobject metricsObj) { 325 NPE_CHECK_RETURN_ZERO(env, paint); 326 SkPaint::FontMetrics metrics; 327 328 GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 329 int ascent = SkScalarRound(metrics.fAscent); 330 int descent = SkScalarRound(metrics.fDescent); 331 int leading = SkScalarRound(metrics.fLeading); 332 333 if (metricsObj) { 334 SkASSERT(env->IsInstanceOf(metricsObj, gFontMetricsInt_class)); 335 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.top, SkScalarFloor(metrics.fTop)); 336 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.ascent, ascent); 337 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.descent, descent); 338 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.bottom, SkScalarCeil(metrics.fBottom)); 339 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.leading, leading); 340 } 341 return descent - ascent + leading; 342 } 343 344 static jfloat measureText_CII(JNIEnv* env, jobject jpaint, jcharArray text, int index, int count) { 345 NPE_CHECK_RETURN_ZERO(env, jpaint); 346 NPE_CHECK_RETURN_ZERO(env, text); 347 348 size_t textLength = env->GetArrayLength(text); 349 if ((index | count) < 0 || (size_t)(index + count) > textLength) { 350 doThrowAIOOBE(env); 351 return 0; 352 } 353 if (count == 0) { 354 return 0; 355 } 356 357 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 358 const jchar* textArray = env->GetCharArrayElements(text, NULL); 359 jfloat result = 0; 360 361 TextLayout::getTextRunAdvances(paint, textArray, index, count, textLength, 362 paint->getFlags(), NULL /* dont need all advances */, &result); 363 364 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); 365 return result; 366 } 367 368 static jfloat measureText_StringII(JNIEnv* env, jobject jpaint, jstring text, int start, int end) { 369 NPE_CHECK_RETURN_ZERO(env, jpaint); 370 NPE_CHECK_RETURN_ZERO(env, text); 371 372 size_t textLength = env->GetStringLength(text); 373 int count = end - start; 374 if ((start | count) < 0 || (size_t)end > textLength) { 375 doThrowAIOOBE(env); 376 return 0; 377 } 378 if (count == 0) { 379 return 0; 380 } 381 382 const jchar* textArray = env->GetStringChars(text, NULL); 383 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 384 jfloat width = 0; 385 386 TextLayout::getTextRunAdvances(paint, textArray, start, count, textLength, 387 paint->getFlags(), NULL /* dont need all advances */, &width); 388 389 env->ReleaseStringChars(text, textArray); 390 return width; 391 } 392 393 static jfloat measureText_String(JNIEnv* env, jobject jpaint, jstring text) { 394 NPE_CHECK_RETURN_ZERO(env, jpaint); 395 NPE_CHECK_RETURN_ZERO(env, text); 396 397 size_t textLength = env->GetStringLength(text); 398 if (textLength == 0) { 399 return 0; 400 } 401 402 const jchar* textArray = env->GetStringChars(text, NULL); 403 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 404 jfloat width = 0; 405 406 TextLayout::getTextRunAdvances(paint, textArray, 0, textLength, textLength, 407 paint->getFlags(), NULL /* dont need all advances */, &width); 408 409 env->ReleaseStringChars(text, textArray); 410 return width; 411 } 412 413 static int dotextwidths(JNIEnv* env, SkPaint* paint, const jchar text[], int count, jfloatArray widths) { 414 NPE_CHECK_RETURN_ZERO(env, paint); 415 NPE_CHECK_RETURN_ZERO(env, text); 416 417 if (count < 0 || !widths) { 418 doThrowAIOOBE(env); 419 return 0; 420 } 421 if (count == 0) { 422 return 0; 423 } 424 size_t widthsLength = env->GetArrayLength(widths); 425 if ((size_t)count > widthsLength) { 426 doThrowAIOOBE(env); 427 return 0; 428 } 429 430 AutoJavaFloatArray autoWidths(env, widths, count); 431 jfloat* widthsArray = autoWidths.ptr(); 432 433 TextLayout::getTextRunAdvances(paint, text, 0, count, count, 434 paint->getFlags(), widthsArray, NULL /* dont need totalAdvance */); 435 436 return count; 437 } 438 439 static int getTextWidths___CII_F(JNIEnv* env, jobject clazz, SkPaint* paint, jcharArray text, int index, int count, jfloatArray widths) { 440 const jchar* textArray = env->GetCharArrayElements(text, NULL); 441 count = dotextwidths(env, paint, textArray + index, count, widths); 442 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 443 JNI_ABORT); 444 return count; 445 } 446 447 static int getTextWidths__StringII_F(JNIEnv* env, jobject clazz, SkPaint* paint, jstring text, 448 int start, int end, jfloatArray widths) { 449 const jchar* textArray = env->GetStringChars(text, NULL); 450 int count = dotextwidths(env, paint, textArray + start, end - start, widths); 451 env->ReleaseStringChars(text, textArray); 452 return count; 453 } 454 455 static int doTextGlyphs(JNIEnv* env, SkPaint* paint, const jchar* text, jint start, jint count, 456 jint contextCount, jint flags, jcharArray glyphs) { 457 NPE_CHECK_RETURN_ZERO(env, paint); 458 NPE_CHECK_RETURN_ZERO(env, text); 459 460 if ((start | count | contextCount) < 0 || contextCount < count || !glyphs) { 461 doThrowAIOOBE(env); 462 return 0; 463 } 464 if (count == 0) { 465 return 0; 466 } 467 size_t glypthsLength = env->GetArrayLength(glyphs); 468 if ((size_t)count > glypthsLength) { 469 doThrowAIOOBE(env); 470 return 0; 471 } 472 473 jchar* glyphsArray = env->GetCharArrayElements(glyphs, NULL); 474 475 sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(paint, 476 text, start, count, contextCount, flags); 477 const jchar* shapedGlyphs = value->getGlyphs(); 478 size_t glyphsCount = value->getGlyphsCount(); 479 memcpy(glyphsArray, shapedGlyphs, sizeof(jchar) * glyphsCount); 480 481 env->ReleaseCharArrayElements(glyphs, glyphsArray, JNI_ABORT); 482 return glyphsCount; 483 } 484 485 static int getTextGlyphs__StringIIIII_C(JNIEnv* env, jobject clazz, SkPaint* paint, 486 jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags, 487 jcharArray glyphs) { 488 const jchar* textArray = env->GetStringChars(text, NULL); 489 int count = doTextGlyphs(env, paint, textArray + contextStart, start - contextStart, 490 end - start, contextEnd - contextStart, flags, glyphs); 491 env->ReleaseStringChars(text, textArray); 492 return count; 493 } 494 495 static jfloat doTextRunAdvances(JNIEnv *env, SkPaint *paint, const jchar *text, 496 jint start, jint count, jint contextCount, jint flags, 497 jfloatArray advances, jint advancesIndex) { 498 NPE_CHECK_RETURN_ZERO(env, paint); 499 NPE_CHECK_RETURN_ZERO(env, text); 500 501 if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) { 502 doThrowAIOOBE(env); 503 return 0; 504 } 505 if (count == 0) { 506 return 0; 507 } 508 if (advances) { 509 size_t advancesLength = env->GetArrayLength(advances); 510 if ((size_t)count > advancesLength) { 511 doThrowAIOOBE(env); 512 return 0; 513 } 514 } 515 jfloat advancesArray[count]; 516 jfloat totalAdvance = 0; 517 518 TextLayout::getTextRunAdvances(paint, text, start, count, contextCount, flags, 519 advancesArray, &totalAdvance); 520 521 if (advances != NULL) { 522 env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray); 523 } 524 return totalAdvance; 525 } 526 527 static jfloat doTextRunAdvancesICU(JNIEnv *env, SkPaint *paint, const jchar *text, 528 jint start, jint count, jint contextCount, jint flags, 529 jfloatArray advances, jint advancesIndex) { 530 NPE_CHECK_RETURN_ZERO(env, paint); 531 NPE_CHECK_RETURN_ZERO(env, text); 532 533 if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) { 534 doThrowAIOOBE(env); 535 return 0; 536 } 537 if (count == 0) { 538 return 0; 539 } 540 if (advances) { 541 size_t advancesLength = env->GetArrayLength(advances); 542 if ((size_t)count > advancesLength) { 543 doThrowAIOOBE(env); 544 return 0; 545 } 546 } 547 548 jfloat advancesArray[count]; 549 jfloat totalAdvance = 0; 550 551 TextLayout::getTextRunAdvancesICU(paint, text, start, count, contextCount, flags, 552 advancesArray, totalAdvance); 553 554 if (advances != NULL) { 555 env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray); 556 } 557 return totalAdvance; 558 } 559 560 static float getTextRunAdvances___CIIIII_FII(JNIEnv* env, jobject clazz, SkPaint* paint, 561 jcharArray text, jint index, jint count, jint contextIndex, jint contextCount, 562 jint flags, jfloatArray advances, jint advancesIndex, jint reserved) { 563 jchar* textArray = env->GetCharArrayElements(text, NULL); 564 jfloat result = (reserved == 0) ? 565 doTextRunAdvances(env, paint, textArray + contextIndex, index - contextIndex, 566 count, contextCount, flags, advances, advancesIndex) : 567 doTextRunAdvancesICU(env, paint, textArray + contextIndex, index - contextIndex, 568 count, contextCount, flags, advances, advancesIndex); 569 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 570 return result; 571 } 572 573 static float getTextRunAdvances__StringIIIII_FII(JNIEnv* env, jobject clazz, SkPaint* paint, 574 jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags, 575 jfloatArray advances, jint advancesIndex, jint reserved) { 576 const jchar* textArray = env->GetStringChars(text, NULL); 577 jfloat result = (reserved == 0) ? 578 doTextRunAdvances(env, paint, textArray + contextStart, start - contextStart, 579 end - start, contextEnd - contextStart, flags, advances, advancesIndex) : 580 doTextRunAdvancesICU(env, paint, textArray + contextStart, start - contextStart, 581 end - start, contextEnd - contextStart, flags, advances, advancesIndex); 582 env->ReleaseStringChars(text, textArray); 583 return result; 584 } 585 586 static jint doTextRunCursor(JNIEnv *env, SkPaint* paint, const jchar *text, jint start, 587 jint count, jint flags, jint offset, jint opt) { 588 jfloat scalarArray[count]; 589 590 TextLayout::getTextRunAdvances(paint, text, start, count, count, flags, 591 scalarArray, NULL /* dont need totalAdvance */); 592 593 jint pos = offset - start; 594 switch (opt) { 595 case AFTER: 596 if (pos < count) { 597 pos += 1; 598 } 599 // fall through 600 case AT_OR_AFTER: 601 while (pos < count && scalarArray[pos] == 0) { 602 ++pos; 603 } 604 break; 605 case BEFORE: 606 if (pos > 0) { 607 --pos; 608 } 609 // fall through 610 case AT_OR_BEFORE: 611 while (pos > 0 && scalarArray[pos] == 0) { 612 --pos; 613 } 614 break; 615 case AT: 616 default: 617 if (scalarArray[pos] == 0) { 618 pos = -1; 619 } 620 break; 621 } 622 623 if (pos != -1) { 624 pos += start; 625 } 626 627 return pos; 628 } 629 630 static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, SkPaint* paint, jcharArray text, 631 jint contextStart, jint contextCount, jint flags, jint offset, jint cursorOpt) { 632 jchar* textArray = env->GetCharArrayElements(text, NULL); 633 jint result = doTextRunCursor(env, paint, textArray, contextStart, contextCount, flags, 634 offset, cursorOpt); 635 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 636 return result; 637 } 638 639 static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, SkPaint* paint, jstring text, 640 jint contextStart, jint contextEnd, jint flags, jint offset, jint cursorOpt) { 641 const jchar* textArray = env->GetStringChars(text, NULL); 642 jint result = doTextRunCursor(env, paint, textArray, contextStart, 643 contextEnd - contextStart, flags, offset, cursorOpt); 644 env->ReleaseStringChars(text, textArray); 645 return result; 646 } 647 648 static void getTextPath(JNIEnv* env, SkPaint* paint, const jchar* text, jint count, 649 jint bidiFlags, jfloat x, jfloat y, SkPath *path) { 650 TextLayout::getTextPath(paint, text, count, bidiFlags, x, y, path); 651 } 652 653 static void getTextPath___C(JNIEnv* env, jobject clazz, SkPaint* paint, jint bidiFlags, 654 jcharArray text, int index, int count, jfloat x, jfloat y, SkPath* path) { 655 const jchar* textArray = env->GetCharArrayElements(text, NULL); 656 getTextPath(env, paint, textArray + index, count, bidiFlags, x, y, path); 657 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); 658 } 659 660 static void getTextPath__String(JNIEnv* env, jobject clazz, SkPaint* paint, jint bidiFlags, 661 jstring text, int start, int end, jfloat x, jfloat y, SkPath* path) { 662 const jchar* textArray = env->GetStringChars(text, NULL); 663 getTextPath(env, paint, textArray + start, end - start, bidiFlags, x, y, path); 664 env->ReleaseStringChars(text, textArray); 665 } 666 667 static void setShadowLayer(JNIEnv* env, jobject jpaint, jfloat radius, 668 jfloat dx, jfloat dy, int color) { 669 NPE_CHECK_RETURN_VOID(env, jpaint); 670 671 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 672 if (radius <= 0) { 673 paint->setLooper(NULL); 674 } 675 else { 676 paint->setLooper(new SkBlurDrawLooper(SkFloatToScalar(radius), 677 SkFloatToScalar(dx), 678 SkFloatToScalar(dy), 679 (SkColor)color))->unref(); 680 } 681 } 682 683 static int breakText(JNIEnv* env, SkPaint& paint, const jchar text[], 684 int count, float maxWidth, jfloatArray jmeasured, 685 SkPaint::TextBufferDirection tbd) { 686 sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(&paint, 687 text, 0, count, count, paint.getFlags()); 688 if (value == NULL) { 689 return 0; 690 } 691 SkScalar measured; 692 size_t bytes = paint.breakText(value->getGlyphs(), value->getGlyphsCount() << 1, 693 SkFloatToScalar(maxWidth), &measured, tbd); 694 SkASSERT((bytes & 1) == 0); 695 696 if (jmeasured && env->GetArrayLength(jmeasured) > 0) { 697 AutoJavaFloatArray autoMeasured(env, jmeasured, 1); 698 jfloat* array = autoMeasured.ptr(); 699 array[0] = SkScalarToFloat(measured); 700 } 701 return bytes >> 1; 702 } 703 704 static int breakTextC(JNIEnv* env, jobject jpaint, jcharArray jtext, 705 int index, int count, float maxWidth, jfloatArray jmeasuredWidth) { 706 NPE_CHECK_RETURN_ZERO(env, jpaint); 707 NPE_CHECK_RETURN_ZERO(env, jtext); 708 709 SkPaint::TextBufferDirection tbd; 710 if (count < 0) { 711 tbd = SkPaint::kBackward_TextBufferDirection; 712 count = -count; 713 } 714 else { 715 tbd = SkPaint::kForward_TextBufferDirection; 716 } 717 718 if ((index < 0) || (index + count > env->GetArrayLength(jtext))) { 719 doThrowAIOOBE(env); 720 return 0; 721 } 722 723 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 724 const jchar* text = env->GetCharArrayElements(jtext, NULL); 725 count = breakText(env, *paint, text + index, count, maxWidth, 726 jmeasuredWidth, tbd); 727 env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text), 728 JNI_ABORT); 729 return count; 730 } 731 732 static int breakTextS(JNIEnv* env, jobject jpaint, jstring jtext, 733 bool forwards, float maxWidth, jfloatArray jmeasuredWidth) { 734 NPE_CHECK_RETURN_ZERO(env, jpaint); 735 NPE_CHECK_RETURN_ZERO(env, jtext); 736 737 SkPaint::TextBufferDirection tbd = forwards ? 738 SkPaint::kForward_TextBufferDirection : 739 SkPaint::kBackward_TextBufferDirection; 740 741 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 742 int count = env->GetStringLength(jtext); 743 const jchar* text = env->GetStringChars(jtext, NULL); 744 count = breakText(env, *paint, text, count, maxWidth, 745 jmeasuredWidth, tbd); 746 env->ReleaseStringChars(jtext, text); 747 return count; 748 } 749 750 static void doTextBounds(JNIEnv* env, const jchar* text, int count, 751 jobject bounds, const SkPaint& paint) 752 { 753 SkRect r; 754 SkIRect ir; 755 756 sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(&paint, 757 text, 0, count, count, paint.getFlags()); 758 if (value == NULL) { 759 return; 760 } 761 paint.measureText(value->getGlyphs(), value->getGlyphsCount() << 1, &r); 762 r.roundOut(&ir); 763 GraphicsJNI::irect_to_jrect(ir, env, bounds); 764 } 765 766 static void getStringBounds(JNIEnv* env, jobject, const SkPaint* paint, 767 jstring text, int start, int end, jobject bounds) 768 { 769 const jchar* textArray = env->GetStringChars(text, NULL); 770 doTextBounds(env, textArray + start, end - start, bounds, *paint); 771 env->ReleaseStringChars(text, textArray); 772 } 773 774 static void getCharArrayBounds(JNIEnv* env, jobject, const SkPaint* paint, 775 jcharArray text, int index, int count, jobject bounds) 776 { 777 const jchar* textArray = env->GetCharArrayElements(text, NULL); 778 doTextBounds(env, textArray + index, count, bounds, *paint); 779 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 780 JNI_ABORT); 781 } 782 783 }; 784 785 static JNINativeMethod methods[] = { 786 {"finalizer", "(I)V", (void*) SkPaintGlue::finalizer}, 787 {"native_init","()I", (void*) SkPaintGlue::init}, 788 {"native_initWithPaint","(I)I", (void*) SkPaintGlue::intiWithPaint}, 789 {"native_reset","(I)V", (void*) SkPaintGlue::reset}, 790 {"native_set","(II)V", (void*) SkPaintGlue::assign}, 791 {"getFlags","()I", (void*) SkPaintGlue::getFlags}, 792 {"setFlags","(I)V", (void*) SkPaintGlue::setFlags}, 793 {"getHinting","()I", (void*) SkPaintGlue::getHinting}, 794 {"setHinting","(I)V", (void*) SkPaintGlue::setHinting}, 795 {"setAntiAlias","(Z)V", (void*) SkPaintGlue::setAntiAlias}, 796 {"setSubpixelText","(Z)V", (void*) SkPaintGlue::setSubpixelText}, 797 {"setLinearText","(Z)V", (void*) SkPaintGlue::setLinearText}, 798 {"setUnderlineText","(Z)V", (void*) SkPaintGlue::setUnderlineText}, 799 {"setStrikeThruText","(Z)V", (void*) SkPaintGlue::setStrikeThruText}, 800 {"setFakeBoldText","(Z)V", (void*) SkPaintGlue::setFakeBoldText}, 801 {"setFilterBitmap","(Z)V", (void*) SkPaintGlue::setFilterBitmap}, 802 {"setDither","(Z)V", (void*) SkPaintGlue::setDither}, 803 {"native_getStyle","(I)I", (void*) SkPaintGlue::getStyle}, 804 {"native_setStyle","(II)V", (void*) SkPaintGlue::setStyle}, 805 {"getColor","()I", (void*) SkPaintGlue::getColor}, 806 {"setColor","(I)V", (void*) SkPaintGlue::setColor}, 807 {"getAlpha","()I", (void*) SkPaintGlue::getAlpha}, 808 {"setAlpha","(I)V", (void*) SkPaintGlue::setAlpha}, 809 {"getStrokeWidth","()F", (void*) SkPaintGlue::getStrokeWidth}, 810 {"setStrokeWidth","(F)V", (void*) SkPaintGlue::setStrokeWidth}, 811 {"getStrokeMiter","()F", (void*) SkPaintGlue::getStrokeMiter}, 812 {"setStrokeMiter","(F)V", (void*) SkPaintGlue::setStrokeMiter}, 813 {"native_getStrokeCap","(I)I", (void*) SkPaintGlue::getStrokeCap}, 814 {"native_setStrokeCap","(II)V", (void*) SkPaintGlue::setStrokeCap}, 815 {"native_getStrokeJoin","(I)I", (void*) SkPaintGlue::getStrokeJoin}, 816 {"native_setStrokeJoin","(II)V", (void*) SkPaintGlue::setStrokeJoin}, 817 {"native_getFillPath","(III)Z", (void*) SkPaintGlue::getFillPath}, 818 {"native_setShader","(II)I", (void*) SkPaintGlue::setShader}, 819 {"native_setColorFilter","(II)I", (void*) SkPaintGlue::setColorFilter}, 820 {"native_setXfermode","(II)I", (void*) SkPaintGlue::setXfermode}, 821 {"native_setPathEffect","(II)I", (void*) SkPaintGlue::setPathEffect}, 822 {"native_setMaskFilter","(II)I", (void*) SkPaintGlue::setMaskFilter}, 823 {"native_setTypeface","(II)I", (void*) SkPaintGlue::setTypeface}, 824 {"native_setRasterizer","(II)I", (void*) SkPaintGlue::setRasterizer}, 825 {"native_getTextAlign","(I)I", (void*) SkPaintGlue::getTextAlign}, 826 {"native_setTextAlign","(II)V", (void*) SkPaintGlue::setTextAlign}, 827 {"native_setTextLocale","(ILjava/lang/String;)V", (void*) SkPaintGlue::setTextLocale}, 828 {"getTextSize","()F", (void*) SkPaintGlue::getTextSize}, 829 {"setTextSize","(F)V", (void*) SkPaintGlue::setTextSize}, 830 {"getTextScaleX","()F", (void*) SkPaintGlue::getTextScaleX}, 831 {"setTextScaleX","(F)V", (void*) SkPaintGlue::setTextScaleX}, 832 {"getTextSkewX","()F", (void*) SkPaintGlue::getTextSkewX}, 833 {"setTextSkewX","(F)V", (void*) SkPaintGlue::setTextSkewX}, 834 {"ascent","()F", (void*) SkPaintGlue::ascent}, 835 {"descent","()F", (void*) SkPaintGlue::descent}, 836 {"getFontMetrics", "(Landroid/graphics/Paint$FontMetrics;)F", (void*)SkPaintGlue::getFontMetrics}, 837 {"getFontMetricsInt", "(Landroid/graphics/Paint$FontMetricsInt;)I", (void*)SkPaintGlue::getFontMetricsInt}, 838 {"native_measureText","([CII)F", (void*) SkPaintGlue::measureText_CII}, 839 {"native_measureText","(Ljava/lang/String;)F", (void*) SkPaintGlue::measureText_String}, 840 {"native_measureText","(Ljava/lang/String;II)F", (void*) SkPaintGlue::measureText_StringII}, 841 {"native_breakText","([CIIF[F)I", (void*) SkPaintGlue::breakTextC}, 842 {"native_breakText","(Ljava/lang/String;ZF[F)I", (void*) SkPaintGlue::breakTextS}, 843 {"native_getTextWidths","(I[CII[F)I", (void*) SkPaintGlue::getTextWidths___CII_F}, 844 {"native_getTextWidths","(ILjava/lang/String;II[F)I", (void*) SkPaintGlue::getTextWidths__StringII_F}, 845 {"native_getTextRunAdvances","(I[CIIIII[FII)F", 846 (void*) SkPaintGlue::getTextRunAdvances___CIIIII_FII}, 847 {"native_getTextRunAdvances","(ILjava/lang/String;IIIII[FII)F", 848 (void*) SkPaintGlue::getTextRunAdvances__StringIIIII_FII}, 849 850 851 {"native_getTextGlyphs","(ILjava/lang/String;IIIII[C)I", 852 (void*) SkPaintGlue::getTextGlyphs__StringIIIII_C}, 853 {"native_getTextRunCursor", "(I[CIIIII)I", (void*) SkPaintGlue::getTextRunCursor___C}, 854 {"native_getTextRunCursor", "(ILjava/lang/String;IIIII)I", 855 (void*) SkPaintGlue::getTextRunCursor__String}, 856 {"native_getTextPath","(II[CIIFFI)V", (void*) SkPaintGlue::getTextPath___C}, 857 {"native_getTextPath","(IILjava/lang/String;IIFFI)V", (void*) SkPaintGlue::getTextPath__String}, 858 {"nativeGetStringBounds", "(ILjava/lang/String;IILandroid/graphics/Rect;)V", 859 (void*) SkPaintGlue::getStringBounds }, 860 {"nativeGetCharArrayBounds", "(I[CIILandroid/graphics/Rect;)V", 861 (void*) SkPaintGlue::getCharArrayBounds }, 862 {"nSetShadowLayer", "(FFFI)V", (void*)SkPaintGlue::setShadowLayer} 863 }; 864 865 static jfieldID req_fieldID(jfieldID id) { 866 SkASSERT(id); 867 return id; 868 } 869 870 int register_android_graphics_Paint(JNIEnv* env) { 871 gFontMetrics_class = env->FindClass("android/graphics/Paint$FontMetrics"); 872 SkASSERT(gFontMetrics_class); 873 gFontMetrics_class = (jclass)env->NewGlobalRef(gFontMetrics_class); 874 875 gFontMetrics_fieldID.top = req_fieldID(env->GetFieldID(gFontMetrics_class, "top", "F")); 876 gFontMetrics_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetrics_class, "ascent", "F")); 877 gFontMetrics_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetrics_class, "descent", "F")); 878 gFontMetrics_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetrics_class, "bottom", "F")); 879 gFontMetrics_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetrics_class, "leading", "F")); 880 881 gFontMetricsInt_class = env->FindClass("android/graphics/Paint$FontMetricsInt"); 882 SkASSERT(gFontMetricsInt_class); 883 gFontMetricsInt_class = (jclass)env->NewGlobalRef(gFontMetricsInt_class); 884 885 gFontMetricsInt_fieldID.top = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "top", "I")); 886 gFontMetricsInt_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "ascent", "I")); 887 gFontMetricsInt_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "descent", "I")); 888 gFontMetricsInt_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "bottom", "I")); 889 gFontMetricsInt_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "leading", "I")); 890 891 int result = AndroidRuntime::registerNativeMethods(env, "android/graphics/Paint", methods, 892 sizeof(methods) / sizeof(methods[0])); 893 return result; 894 } 895 896 } 897