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_CIII(JNIEnv* env, jobject jpaint, jcharArray text, int index, int count, 387 jint bidiFlags) { 388 NPE_CHECK_RETURN_ZERO(env, jpaint); 389 NPE_CHECK_RETURN_ZERO(env, text); 390 391 size_t textLength = env->GetArrayLength(text); 392 if ((index | count) < 0 || (size_t)(index + count) > textLength) { 393 doThrowAIOOBE(env); 394 return 0; 395 } 396 if (count == 0) { 397 return 0; 398 } 399 400 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 401 const jchar* textArray = env->GetCharArrayElements(text, NULL); 402 jfloat result = 0; 403 404 TextLayout::getTextRunAdvances(paint, textArray, index, count, textLength, 405 bidiFlags, NULL /* dont need all advances */, &result); 406 407 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); 408 return result; 409 } 410 411 static jfloat measureText_StringIII(JNIEnv* env, jobject jpaint, jstring text, int start, int end, 412 jint bidiFlags) { 413 NPE_CHECK_RETURN_ZERO(env, jpaint); 414 NPE_CHECK_RETURN_ZERO(env, text); 415 416 size_t textLength = env->GetStringLength(text); 417 int count = end - start; 418 if ((start | count) < 0 || (size_t)end > textLength) { 419 doThrowAIOOBE(env); 420 return 0; 421 } 422 if (count == 0) { 423 return 0; 424 } 425 426 const jchar* textArray = env->GetStringChars(text, NULL); 427 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 428 jfloat width = 0; 429 430 TextLayout::getTextRunAdvances(paint, textArray, start, count, textLength, 431 bidiFlags, NULL /* dont need all advances */, &width); 432 433 env->ReleaseStringChars(text, textArray); 434 return width; 435 } 436 437 static jfloat measureText_StringI(JNIEnv* env, jobject jpaint, jstring text, jint bidiFlags) { 438 NPE_CHECK_RETURN_ZERO(env, jpaint); 439 NPE_CHECK_RETURN_ZERO(env, text); 440 441 size_t textLength = env->GetStringLength(text); 442 if (textLength == 0) { 443 return 0; 444 } 445 446 const jchar* textArray = env->GetStringChars(text, NULL); 447 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 448 jfloat width = 0; 449 450 TextLayout::getTextRunAdvances(paint, textArray, 0, textLength, textLength, 451 bidiFlags, NULL /* dont need all advances */, &width); 452 453 env->ReleaseStringChars(text, textArray); 454 return width; 455 } 456 457 static int dotextwidths(JNIEnv* env, SkPaint* paint, const jchar text[], int count, jfloatArray widths, 458 jint bidiFlags) { 459 NPE_CHECK_RETURN_ZERO(env, paint); 460 NPE_CHECK_RETURN_ZERO(env, text); 461 462 if (count < 0 || !widths) { 463 doThrowAIOOBE(env); 464 return 0; 465 } 466 if (count == 0) { 467 return 0; 468 } 469 size_t widthsLength = env->GetArrayLength(widths); 470 if ((size_t)count > widthsLength) { 471 doThrowAIOOBE(env); 472 return 0; 473 } 474 475 AutoJavaFloatArray autoWidths(env, widths, count); 476 jfloat* widthsArray = autoWidths.ptr(); 477 478 TextLayout::getTextRunAdvances(paint, text, 0, count, count, 479 bidiFlags, widthsArray, NULL /* dont need totalAdvance */); 480 481 return count; 482 } 483 484 static int getTextWidths___CIII_F(JNIEnv* env, jobject clazz, SkPaint* paint, jcharArray text, 485 int index, int count, jint bidiFlags, jfloatArray widths) { 486 const jchar* textArray = env->GetCharArrayElements(text, NULL); 487 count = dotextwidths(env, paint, textArray + index, count, widths, bidiFlags); 488 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 489 JNI_ABORT); 490 return count; 491 } 492 493 static int getTextWidths__StringIII_F(JNIEnv* env, jobject clazz, SkPaint* paint, jstring text, 494 int start, int end, jint bidiFlags, jfloatArray widths) { 495 const jchar* textArray = env->GetStringChars(text, NULL); 496 int count = dotextwidths(env, paint, textArray + start, end - start, widths, bidiFlags); 497 env->ReleaseStringChars(text, textArray); 498 return count; 499 } 500 501 static int doTextGlyphs(JNIEnv* env, SkPaint* paint, const jchar* text, jint start, jint count, 502 jint contextCount, jint flags, jcharArray glyphs) { 503 NPE_CHECK_RETURN_ZERO(env, paint); 504 NPE_CHECK_RETURN_ZERO(env, text); 505 506 if ((start | count | contextCount) < 0 || contextCount < count || !glyphs) { 507 doThrowAIOOBE(env); 508 return 0; 509 } 510 if (count == 0) { 511 return 0; 512 } 513 size_t glypthsLength = env->GetArrayLength(glyphs); 514 if ((size_t)count > glypthsLength) { 515 doThrowAIOOBE(env); 516 return 0; 517 } 518 519 jchar* glyphsArray = env->GetCharArrayElements(glyphs, NULL); 520 521 sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(paint, 522 text, start, count, contextCount, flags); 523 const jchar* shapedGlyphs = value->getGlyphs(); 524 size_t glyphsCount = value->getGlyphsCount(); 525 memcpy(glyphsArray, shapedGlyphs, sizeof(jchar) * glyphsCount); 526 527 env->ReleaseCharArrayElements(glyphs, glyphsArray, JNI_ABORT); 528 return glyphsCount; 529 } 530 531 static int getTextGlyphs__StringIIIII_C(JNIEnv* env, jobject clazz, SkPaint* paint, 532 jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags, 533 jcharArray glyphs) { 534 const jchar* textArray = env->GetStringChars(text, NULL); 535 int count = doTextGlyphs(env, paint, textArray + contextStart, start - contextStart, 536 end - start, contextEnd - contextStart, flags, glyphs); 537 env->ReleaseStringChars(text, textArray); 538 return count; 539 } 540 541 static jfloat doTextRunAdvances(JNIEnv *env, SkPaint *paint, const jchar *text, 542 jint start, jint count, jint contextCount, jint flags, 543 jfloatArray advances, jint advancesIndex) { 544 NPE_CHECK_RETURN_ZERO(env, paint); 545 NPE_CHECK_RETURN_ZERO(env, text); 546 547 if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) { 548 doThrowAIOOBE(env); 549 return 0; 550 } 551 if (count == 0) { 552 return 0; 553 } 554 if (advances) { 555 size_t advancesLength = env->GetArrayLength(advances); 556 if ((size_t)count > advancesLength) { 557 doThrowAIOOBE(env); 558 return 0; 559 } 560 } 561 jfloat advancesArray[count]; 562 jfloat totalAdvance = 0; 563 564 TextLayout::getTextRunAdvances(paint, text, start, count, contextCount, flags, 565 advancesArray, &totalAdvance); 566 567 if (advances != NULL) { 568 env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray); 569 } 570 return totalAdvance; 571 } 572 573 static float getTextRunAdvances___CIIIII_FI(JNIEnv* env, jobject clazz, SkPaint* paint, 574 jcharArray text, jint index, jint count, jint contextIndex, jint contextCount, 575 jint flags, jfloatArray advances, jint advancesIndex) { 576 jchar* textArray = env->GetCharArrayElements(text, NULL); 577 jfloat result = doTextRunAdvances(env, paint, textArray + contextIndex, 578 index - contextIndex, count, contextCount, flags, advances, advancesIndex); 579 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 580 return result; 581 } 582 583 static float getTextRunAdvances__StringIIIII_FI(JNIEnv* env, jobject clazz, SkPaint* paint, 584 jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags, 585 jfloatArray advances, jint advancesIndex) { 586 const jchar* textArray = env->GetStringChars(text, NULL); 587 jfloat result = doTextRunAdvances(env, paint, textArray + contextStart, 588 start - contextStart, end - start, contextEnd - contextStart, flags, 589 advances, advancesIndex); 590 env->ReleaseStringChars(text, textArray); 591 return result; 592 } 593 594 static jint doTextRunCursor(JNIEnv *env, SkPaint* paint, const jchar *text, jint start, 595 jint count, jint flags, jint offset, jint opt) { 596 jfloat scalarArray[count]; 597 598 TextLayout::getTextRunAdvances(paint, text, start, count, start + count, flags, 599 scalarArray, NULL /* dont need totalAdvance */); 600 601 jint pos = offset - start; 602 switch (opt) { 603 case AFTER: 604 if (pos < count) { 605 pos += 1; 606 } 607 // fall through 608 case AT_OR_AFTER: 609 while (pos < count && scalarArray[pos] == 0) { 610 ++pos; 611 } 612 break; 613 case BEFORE: 614 if (pos > 0) { 615 --pos; 616 } 617 // fall through 618 case AT_OR_BEFORE: 619 while (pos > 0 && scalarArray[pos] == 0) { 620 --pos; 621 } 622 break; 623 case AT: 624 default: 625 if (scalarArray[pos] == 0) { 626 pos = -1; 627 } 628 break; 629 } 630 631 if (pos != -1) { 632 pos += start; 633 } 634 635 return pos; 636 } 637 638 static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, SkPaint* paint, jcharArray text, 639 jint contextStart, jint contextCount, jint flags, jint offset, jint cursorOpt) { 640 jchar* textArray = env->GetCharArrayElements(text, NULL); 641 jint result = doTextRunCursor(env, paint, textArray, contextStart, contextCount, flags, 642 offset, cursorOpt); 643 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 644 return result; 645 } 646 647 static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, SkPaint* paint, jstring text, 648 jint contextStart, jint contextEnd, jint flags, jint offset, jint cursorOpt) { 649 const jchar* textArray = env->GetStringChars(text, NULL); 650 jint result = doTextRunCursor(env, paint, textArray, contextStart, 651 contextEnd - contextStart, flags, offset, cursorOpt); 652 env->ReleaseStringChars(text, textArray); 653 return result; 654 } 655 656 static void getTextPath(JNIEnv* env, SkPaint* paint, const jchar* text, jint count, 657 jint bidiFlags, jfloat x, jfloat y, SkPath *path) { 658 TextLayout::getTextPath(paint, text, count, bidiFlags, x, y, path); 659 } 660 661 static void getTextPath___C(JNIEnv* env, jobject clazz, SkPaint* paint, jint bidiFlags, 662 jcharArray text, int index, int count, jfloat x, jfloat y, SkPath* path) { 663 const jchar* textArray = env->GetCharArrayElements(text, NULL); 664 getTextPath(env, paint, textArray + index, count, bidiFlags, x, y, path); 665 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); 666 } 667 668 static void getTextPath__String(JNIEnv* env, jobject clazz, SkPaint* paint, jint bidiFlags, 669 jstring text, int start, int end, jfloat x, jfloat y, SkPath* path) { 670 const jchar* textArray = env->GetStringChars(text, NULL); 671 getTextPath(env, paint, textArray + start, end - start, bidiFlags, x, y, path); 672 env->ReleaseStringChars(text, textArray); 673 } 674 675 static void setShadowLayer(JNIEnv* env, jobject jpaint, jfloat radius, 676 jfloat dx, jfloat dy, int color) { 677 NPE_CHECK_RETURN_VOID(env, jpaint); 678 679 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 680 if (radius <= 0) { 681 paint->setLooper(NULL); 682 } 683 else { 684 paint->setLooper(new SkBlurDrawLooper(SkFloatToScalar(radius), 685 SkFloatToScalar(dx), 686 SkFloatToScalar(dy), 687 (SkColor)color))->unref(); 688 } 689 } 690 691 static int breakText(JNIEnv* env, SkPaint& paint, const jchar text[], 692 int count, float maxWidth, jint bidiFlags, jfloatArray jmeasured, 693 SkPaint::TextBufferDirection tbd) { 694 sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(&paint, 695 text, 0, count, count, bidiFlags); 696 if (value == NULL) { 697 return 0; 698 } 699 SkScalar measured; 700 size_t bytes = paint.breakText(value->getGlyphs(), value->getGlyphsCount() << 1, 701 SkFloatToScalar(maxWidth), &measured, tbd); 702 SkASSERT((bytes & 1) == 0); 703 704 if (jmeasured && env->GetArrayLength(jmeasured) > 0) { 705 AutoJavaFloatArray autoMeasured(env, jmeasured, 1); 706 jfloat* array = autoMeasured.ptr(); 707 array[0] = SkScalarToFloat(measured); 708 } 709 return bytes >> 1; 710 } 711 712 static int breakTextC(JNIEnv* env, jobject jpaint, jcharArray jtext, 713 int index, int count, float maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) { 714 NPE_CHECK_RETURN_ZERO(env, jpaint); 715 NPE_CHECK_RETURN_ZERO(env, jtext); 716 717 SkPaint::TextBufferDirection tbd; 718 if (count < 0) { 719 tbd = SkPaint::kBackward_TextBufferDirection; 720 count = -count; 721 } 722 else { 723 tbd = SkPaint::kForward_TextBufferDirection; 724 } 725 726 if ((index < 0) || (index + count > env->GetArrayLength(jtext))) { 727 doThrowAIOOBE(env); 728 return 0; 729 } 730 731 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 732 const jchar* text = env->GetCharArrayElements(jtext, NULL); 733 count = breakText(env, *paint, text + index, count, maxWidth, 734 bidiFlags, jmeasuredWidth, tbd); 735 env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text), 736 JNI_ABORT); 737 return count; 738 } 739 740 static int breakTextS(JNIEnv* env, jobject jpaint, jstring jtext, 741 bool forwards, float maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) { 742 NPE_CHECK_RETURN_ZERO(env, jpaint); 743 NPE_CHECK_RETURN_ZERO(env, jtext); 744 745 SkPaint::TextBufferDirection tbd = forwards ? 746 SkPaint::kForward_TextBufferDirection : 747 SkPaint::kBackward_TextBufferDirection; 748 749 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 750 int count = env->GetStringLength(jtext); 751 const jchar* text = env->GetStringChars(jtext, NULL); 752 count = breakText(env, *paint, text, count, maxWidth, bidiFlags, jmeasuredWidth, tbd); 753 env->ReleaseStringChars(jtext, text); 754 return count; 755 } 756 757 static void doTextBounds(JNIEnv* env, const jchar* text, int count, 758 jobject bounds, const SkPaint& paint, jint bidiFlags) { 759 SkRect r; 760 r.set(0,0,0,0); 761 762 SkIRect ir; 763 764 sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(&paint, 765 text, 0, count, count, bidiFlags); 766 if (value == NULL) { 767 return; 768 } 769 paint.measureText(value->getGlyphs(), value->getGlyphsCount() << 1, &r); 770 r.roundOut(&ir); 771 GraphicsJNI::irect_to_jrect(ir, env, bounds); 772 } 773 774 static void getStringBounds(JNIEnv* env, jobject, const SkPaint* paint, 775 jstring text, int start, int end, jint bidiFlags, jobject bounds) { 776 const jchar* textArray = env->GetStringChars(text, NULL); 777 doTextBounds(env, textArray + start, end - start, bounds, *paint, bidiFlags); 778 env->ReleaseStringChars(text, textArray); 779 } 780 781 static void getCharArrayBounds(JNIEnv* env, jobject, const SkPaint* paint, 782 jcharArray text, int index, int count, jint bidiFlags, jobject bounds) { 783 const jchar* textArray = env->GetCharArrayElements(text, NULL); 784 doTextBounds(env, textArray + index, count, bounds, *paint, bidiFlags); 785 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 786 JNI_ABORT); 787 } 788 789 }; 790 791 static JNINativeMethod methods[] = { 792 {"finalizer", "(I)V", (void*) SkPaintGlue::finalizer}, 793 {"native_init","()I", (void*) SkPaintGlue::init}, 794 {"native_initWithPaint","(I)I", (void*) SkPaintGlue::intiWithPaint}, 795 {"native_reset","(I)V", (void*) SkPaintGlue::reset}, 796 {"native_set","(II)V", (void*) SkPaintGlue::assign}, 797 {"getFlags","()I", (void*) SkPaintGlue::getFlags}, 798 {"setFlags","(I)V", (void*) SkPaintGlue::setFlags}, 799 {"getHinting","()I", (void*) SkPaintGlue::getHinting}, 800 {"setHinting","(I)V", (void*) SkPaintGlue::setHinting}, 801 {"setAntiAlias","(Z)V", (void*) SkPaintGlue::setAntiAlias}, 802 {"setSubpixelText","(Z)V", (void*) SkPaintGlue::setSubpixelText}, 803 {"setLinearText","(Z)V", (void*) SkPaintGlue::setLinearText}, 804 {"setUnderlineText","(Z)V", (void*) SkPaintGlue::setUnderlineText}, 805 {"setStrikeThruText","(Z)V", (void*) SkPaintGlue::setStrikeThruText}, 806 {"setFakeBoldText","(Z)V", (void*) SkPaintGlue::setFakeBoldText}, 807 {"setFilterBitmap","(Z)V", (void*) SkPaintGlue::setFilterBitmap}, 808 {"setDither","(Z)V", (void*) SkPaintGlue::setDither}, 809 {"native_getStyle","(I)I", (void*) SkPaintGlue::getStyle}, 810 {"native_setStyle","(II)V", (void*) SkPaintGlue::setStyle}, 811 {"getColor","()I", (void*) SkPaintGlue::getColor}, 812 {"setColor","(I)V", (void*) SkPaintGlue::setColor}, 813 {"getAlpha","()I", (void*) SkPaintGlue::getAlpha}, 814 {"setAlpha","(I)V", (void*) SkPaintGlue::setAlpha}, 815 {"getStrokeWidth","()F", (void*) SkPaintGlue::getStrokeWidth}, 816 {"setStrokeWidth","(F)V", (void*) SkPaintGlue::setStrokeWidth}, 817 {"getStrokeMiter","()F", (void*) SkPaintGlue::getStrokeMiter}, 818 {"setStrokeMiter","(F)V", (void*) SkPaintGlue::setStrokeMiter}, 819 {"native_getStrokeCap","(I)I", (void*) SkPaintGlue::getStrokeCap}, 820 {"native_setStrokeCap","(II)V", (void*) SkPaintGlue::setStrokeCap}, 821 {"native_getStrokeJoin","(I)I", (void*) SkPaintGlue::getStrokeJoin}, 822 {"native_setStrokeJoin","(II)V", (void*) SkPaintGlue::setStrokeJoin}, 823 {"native_getFillPath","(III)Z", (void*) SkPaintGlue::getFillPath}, 824 {"native_setShader","(II)I", (void*) SkPaintGlue::setShader}, 825 {"native_setColorFilter","(II)I", (void*) SkPaintGlue::setColorFilter}, 826 {"native_setXfermode","(II)I", (void*) SkPaintGlue::setXfermode}, 827 {"native_setPathEffect","(II)I", (void*) SkPaintGlue::setPathEffect}, 828 {"native_setMaskFilter","(II)I", (void*) SkPaintGlue::setMaskFilter}, 829 {"native_setTypeface","(II)I", (void*) SkPaintGlue::setTypeface}, 830 {"native_setRasterizer","(II)I", (void*) SkPaintGlue::setRasterizer}, 831 {"native_getTextAlign","(I)I", (void*) SkPaintGlue::getTextAlign}, 832 {"native_setTextAlign","(II)V", (void*) SkPaintGlue::setTextAlign}, 833 {"native_setTextLocale","(ILjava/lang/String;)V", (void*) SkPaintGlue::setTextLocale}, 834 {"getTextSize","()F", (void*) SkPaintGlue::getTextSize}, 835 {"setTextSize","(F)V", (void*) SkPaintGlue::setTextSize}, 836 {"getTextScaleX","()F", (void*) SkPaintGlue::getTextScaleX}, 837 {"setTextScaleX","(F)V", (void*) SkPaintGlue::setTextScaleX}, 838 {"getTextSkewX","()F", (void*) SkPaintGlue::getTextSkewX}, 839 {"setTextSkewX","(F)V", (void*) SkPaintGlue::setTextSkewX}, 840 {"ascent","()F", (void*) SkPaintGlue::ascent}, 841 {"descent","()F", (void*) SkPaintGlue::descent}, 842 {"getFontMetrics", "(Landroid/graphics/Paint$FontMetrics;)F", (void*)SkPaintGlue::getFontMetrics}, 843 {"getFontMetricsInt", "(Landroid/graphics/Paint$FontMetricsInt;)I", (void*)SkPaintGlue::getFontMetricsInt}, 844 {"native_measureText","([CIII)F", (void*) SkPaintGlue::measureText_CIII}, 845 {"native_measureText","(Ljava/lang/String;I)F", (void*) SkPaintGlue::measureText_StringI}, 846 {"native_measureText","(Ljava/lang/String;III)F", (void*) SkPaintGlue::measureText_StringIII}, 847 {"native_breakText","([CIIFI[F)I", (void*) SkPaintGlue::breakTextC}, 848 {"native_breakText","(Ljava/lang/String;ZFI[F)I", (void*) SkPaintGlue::breakTextS}, 849 {"native_getTextWidths","(I[CIII[F)I", (void*) SkPaintGlue::getTextWidths___CIII_F}, 850 {"native_getTextWidths","(ILjava/lang/String;III[F)I", (void*) SkPaintGlue::getTextWidths__StringIII_F}, 851 {"native_getTextRunAdvances","(I[CIIIII[FI)F", 852 (void*) SkPaintGlue::getTextRunAdvances___CIIIII_FI}, 853 {"native_getTextRunAdvances","(ILjava/lang/String;IIIII[FI)F", 854 (void*) SkPaintGlue::getTextRunAdvances__StringIIIII_FI}, 855 856 857 {"native_getTextGlyphs","(ILjava/lang/String;IIIII[C)I", 858 (void*) SkPaintGlue::getTextGlyphs__StringIIIII_C}, 859 {"native_getTextRunCursor", "(I[CIIIII)I", (void*) SkPaintGlue::getTextRunCursor___C}, 860 {"native_getTextRunCursor", "(ILjava/lang/String;IIIII)I", 861 (void*) SkPaintGlue::getTextRunCursor__String}, 862 {"native_getTextPath","(II[CIIFFI)V", (void*) SkPaintGlue::getTextPath___C}, 863 {"native_getTextPath","(IILjava/lang/String;IIFFI)V", (void*) SkPaintGlue::getTextPath__String}, 864 {"nativeGetStringBounds", "(ILjava/lang/String;IIILandroid/graphics/Rect;)V", 865 (void*) SkPaintGlue::getStringBounds }, 866 {"nativeGetCharArrayBounds", "(I[CIIILandroid/graphics/Rect;)V", 867 (void*) SkPaintGlue::getCharArrayBounds }, 868 {"nSetShadowLayer", "(FFFI)V", (void*)SkPaintGlue::setShadowLayer} 869 }; 870 871 static jfieldID req_fieldID(jfieldID id) { 872 SkASSERT(id); 873 return id; 874 } 875 876 int register_android_graphics_Paint(JNIEnv* env) { 877 gFontMetrics_class = env->FindClass("android/graphics/Paint$FontMetrics"); 878 SkASSERT(gFontMetrics_class); 879 gFontMetrics_class = (jclass)env->NewGlobalRef(gFontMetrics_class); 880 881 gFontMetrics_fieldID.top = req_fieldID(env->GetFieldID(gFontMetrics_class, "top", "F")); 882 gFontMetrics_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetrics_class, "ascent", "F")); 883 gFontMetrics_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetrics_class, "descent", "F")); 884 gFontMetrics_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetrics_class, "bottom", "F")); 885 gFontMetrics_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetrics_class, "leading", "F")); 886 887 gFontMetricsInt_class = env->FindClass("android/graphics/Paint$FontMetricsInt"); 888 SkASSERT(gFontMetricsInt_class); 889 gFontMetricsInt_class = (jclass)env->NewGlobalRef(gFontMetricsInt_class); 890 891 gFontMetricsInt_fieldID.top = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "top", "I")); 892 gFontMetricsInt_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "ascent", "I")); 893 gFontMetricsInt_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "descent", "I")); 894 gFontMetricsInt_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "bottom", "I")); 895 gFontMetricsInt_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "leading", "I")); 896 897 int result = AndroidRuntime::registerNativeMethods(env, "android/graphics/Paint", methods, 898 sizeof(methods) / sizeof(methods[0])); 899 return result; 900 } 901 902 } 903
