Paint.cpp revision a033630e805c407080221e20b236b6054f324670
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 42namespace android { 43 44struct JMetricsID { 45 jfieldID top; 46 jfieldID ascent; 47 jfieldID descent; 48 jfieldID bottom; 49 jfieldID leading; 50}; 51 52static jclass gFontMetrics_class; 53static JMetricsID gFontMetrics_fieldID; 54 55static jclass gFontMetricsInt_class; 56static JMetricsID gFontMetricsInt_fieldID; 57 58static void defaultSettingsForAndroid(SkPaint* paint) { 59 // GlyphID encoding is required because we are using Harfbuzz shaping 60 paint->setTextEncoding(SkPaint::kGlyphID_TextEncoding); 61 62 SkPaintOptionsAndroid paintOpts = paint->getPaintOptionsAndroid(); 63 paintOpts.setUseFontFallbacks(true); 64 paint->setPaintOptionsAndroid(paintOpts); 65} 66 67class SkPaintGlue { 68public: 69 enum MoveOpt { 70 AFTER, AT_OR_AFTER, BEFORE, AT_OR_BEFORE, AT 71 }; 72 73 static void finalizer(JNIEnv* env, jobject clazz, SkPaint* obj) { 74 delete obj; 75 } 76 77 static SkPaint* init(JNIEnv* env, jobject clazz) { 78 SkPaint* obj = new SkPaint(); 79 defaultSettingsForAndroid(obj); 80 return obj; 81 } 82 83 static SkPaint* intiWithPaint(JNIEnv* env, jobject clazz, SkPaint* paint) { 84 SkPaint* obj = new SkPaint(*paint); 85 return obj; 86 } 87 88 static void reset(JNIEnv* env, jobject clazz, SkPaint* obj) { 89 obj->reset(); 90 defaultSettingsForAndroid(obj); 91 } 92 93 static void assign(JNIEnv* env, jobject clazz, SkPaint* dst, const SkPaint* src) { 94 *dst = *src; 95 } 96 97 static jint getFlags(JNIEnv* env, jobject paint) { 98 NPE_CHECK_RETURN_ZERO(env, paint); 99 return GraphicsJNI::getNativePaint(env, paint)->getFlags(); 100 } 101 102 static void setFlags(JNIEnv* env, jobject paint, jint flags) { 103 NPE_CHECK_RETURN_VOID(env, paint); 104 GraphicsJNI::getNativePaint(env, paint)->setFlags(flags); 105 } 106 107 static jint getHinting(JNIEnv* env, jobject paint) { 108 NPE_CHECK_RETURN_ZERO(env, paint); 109 return GraphicsJNI::getNativePaint(env, paint)->getHinting() 110 == SkPaint::kNo_Hinting ? 0 : 1; 111 } 112 113 static void setHinting(JNIEnv* env, jobject paint, jint mode) { 114 NPE_CHECK_RETURN_VOID(env, paint); 115 GraphicsJNI::getNativePaint(env, paint)->setHinting( 116 mode == 0 ? SkPaint::kNo_Hinting : SkPaint::kNormal_Hinting); 117 } 118 119 static void setAntiAlias(JNIEnv* env, jobject paint, jboolean aa) { 120 NPE_CHECK_RETURN_VOID(env, paint); 121 GraphicsJNI::getNativePaint(env, paint)->setAntiAlias(aa); 122 } 123 124 static void setLinearText(JNIEnv* env, jobject paint, jboolean linearText) { 125 NPE_CHECK_RETURN_VOID(env, paint); 126 GraphicsJNI::getNativePaint(env, paint)->setLinearText(linearText); 127 } 128 129 static void setSubpixelText(JNIEnv* env, jobject paint, jboolean subpixelText) { 130 NPE_CHECK_RETURN_VOID(env, paint); 131 GraphicsJNI::getNativePaint(env, paint)->setSubpixelText(subpixelText); 132 } 133 134 static void setUnderlineText(JNIEnv* env, jobject paint, jboolean underlineText) { 135 NPE_CHECK_RETURN_VOID(env, paint); 136 GraphicsJNI::getNativePaint(env, paint)->setUnderlineText(underlineText); 137 } 138 139 static void setStrikeThruText(JNIEnv* env, jobject paint, jboolean strikeThruText) { 140 NPE_CHECK_RETURN_VOID(env, paint); 141 GraphicsJNI::getNativePaint(env, paint)->setStrikeThruText(strikeThruText); 142 } 143 144 static void setFakeBoldText(JNIEnv* env, jobject paint, jboolean fakeBoldText) { 145 NPE_CHECK_RETURN_VOID(env, paint); 146 GraphicsJNI::getNativePaint(env, paint)->setFakeBoldText(fakeBoldText); 147 } 148 149 static void setFilterBitmap(JNIEnv* env, jobject paint, jboolean filterBitmap) { 150 NPE_CHECK_RETURN_VOID(env, paint); 151 GraphicsJNI::getNativePaint(env, paint)->setFilterBitmap(filterBitmap); 152 } 153 154 static void setDither(JNIEnv* env, jobject paint, jboolean dither) { 155 NPE_CHECK_RETURN_VOID(env, paint); 156 GraphicsJNI::getNativePaint(env, paint)->setDither(dither); 157 } 158 159 static jint getStyle(JNIEnv* env, jobject clazz, SkPaint* obj) { 160 return obj->getStyle(); 161 } 162 163 static void setStyle(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Style style) { 164 obj->setStyle(style); 165 } 166 167 static jint getColor(JNIEnv* env, jobject paint) { 168 NPE_CHECK_RETURN_ZERO(env, paint); 169 return GraphicsJNI::getNativePaint(env, paint)->getColor(); 170 } 171 172 static jint getAlpha(JNIEnv* env, jobject paint) { 173 NPE_CHECK_RETURN_ZERO(env, paint); 174 return GraphicsJNI::getNativePaint(env, paint)->getAlpha(); 175 } 176 177 static void setColor(JNIEnv* env, jobject paint, jint color) { 178 NPE_CHECK_RETURN_VOID(env, paint); 179 GraphicsJNI::getNativePaint(env, paint)->setColor(color); 180 } 181 182 static void setAlpha(JNIEnv* env, jobject paint, jint a) { 183 NPE_CHECK_RETURN_VOID(env, paint); 184 GraphicsJNI::getNativePaint(env, paint)->setAlpha(a); 185 } 186 187 static jfloat getStrokeWidth(JNIEnv* env, jobject paint) { 188 NPE_CHECK_RETURN_ZERO(env, paint); 189 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeWidth()); 190 } 191 192 static void setStrokeWidth(JNIEnv* env, jobject paint, jfloat width) { 193 NPE_CHECK_RETURN_VOID(env, paint); 194 GraphicsJNI::getNativePaint(env, paint)->setStrokeWidth(SkFloatToScalar(width)); 195 } 196 197 static jfloat getStrokeMiter(JNIEnv* env, jobject paint) { 198 NPE_CHECK_RETURN_ZERO(env, paint); 199 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeMiter()); 200 } 201 202 static void setStrokeMiter(JNIEnv* env, jobject paint, jfloat miter) { 203 NPE_CHECK_RETURN_VOID(env, paint); 204 GraphicsJNI::getNativePaint(env, paint)->setStrokeMiter(SkFloatToScalar(miter)); 205 } 206 207 static jint getStrokeCap(JNIEnv* env, jobject clazz, SkPaint* obj) { 208 return obj->getStrokeCap(); 209 } 210 211 static void setStrokeCap(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Cap cap) { 212 obj->setStrokeCap(cap); 213 } 214 215 static jint getStrokeJoin(JNIEnv* env, jobject clazz, SkPaint* obj) { 216 return obj->getStrokeJoin(); 217 } 218 219 static void setStrokeJoin(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Join join) { 220 obj->setStrokeJoin(join); 221 } 222 223 static jboolean getFillPath(JNIEnv* env, jobject clazz, SkPaint* obj, SkPath* src, SkPath* dst) { 224 return obj->getFillPath(*src, dst); 225 } 226 227 static SkShader* setShader(JNIEnv* env, jobject clazz, SkPaint* obj, SkShader* shader) { 228 return obj->setShader(shader); 229 } 230 231 static SkColorFilter* setColorFilter(JNIEnv* env, jobject clazz, SkPaint* obj, SkColorFilter* filter) { 232 return obj->setColorFilter(filter); 233 } 234 235 static SkXfermode* setXfermode(JNIEnv* env, jobject clazz, SkPaint* obj, SkXfermode* xfermode) { 236 return obj->setXfermode(xfermode); 237 } 238 239 static SkPathEffect* setPathEffect(JNIEnv* env, jobject clazz, SkPaint* obj, SkPathEffect* effect) { 240 return obj->setPathEffect(effect); 241 } 242 243 static SkMaskFilter* setMaskFilter(JNIEnv* env, jobject clazz, SkPaint* obj, SkMaskFilter* maskfilter) { 244 return obj->setMaskFilter(maskfilter); 245 } 246 247 static SkTypeface* setTypeface(JNIEnv* env, jobject clazz, SkPaint* obj, SkTypeface* typeface) { 248#ifndef USE_MINIKIN 249 return obj->setTypeface(typeface); 250#else 251 // TODO(raph): not yet implemented 252 return NULL; 253#endif 254 } 255 256 static SkRasterizer* setRasterizer(JNIEnv* env, jobject clazz, SkPaint* obj, SkRasterizer* rasterizer) { 257 return obj->setRasterizer(rasterizer); 258 } 259 260 static jint getTextAlign(JNIEnv* env, jobject clazz, SkPaint* obj) { 261 return obj->getTextAlign(); 262 } 263 264 static void setTextAlign(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Align align) { 265 obj->setTextAlign(align); 266 } 267 268 // generate bcp47 identifier for the supplied locale 269 static void toLanguageTag(char* output, size_t outSize, 270 const char* locale) { 271 if (output == NULL || outSize <= 0) { 272 return; 273 } 274 if (locale == NULL) { 275 output[0] = '\0'; 276 return; 277 } 278 char canonicalChars[ULOC_FULLNAME_CAPACITY]; 279 UErrorCode uErr = U_ZERO_ERROR; 280 uloc_canonicalize(locale, canonicalChars, ULOC_FULLNAME_CAPACITY, 281 &uErr); 282 if (U_SUCCESS(uErr)) { 283 char likelyChars[ULOC_FULLNAME_CAPACITY]; 284 uErr = U_ZERO_ERROR; 285 uloc_addLikelySubtags(canonicalChars, likelyChars, 286 ULOC_FULLNAME_CAPACITY, &uErr); 287 if (U_SUCCESS(uErr)) { 288 uErr = U_ZERO_ERROR; 289 uloc_toLanguageTag(likelyChars, output, outSize, FALSE, &uErr); 290 if (U_SUCCESS(uErr)) { 291 return; 292 } else { 293 ALOGD("uloc_toLanguageTag(\"%s\") failed: %s", likelyChars, 294 u_errorName(uErr)); 295 } 296 } else { 297 ALOGD("uloc_addLikelySubtags(\"%s\") failed: %s", 298 canonicalChars, u_errorName(uErr)); 299 } 300 } else { 301 ALOGD("uloc_canonicalize(\"%s\") failed: %s", locale, 302 u_errorName(uErr)); 303 } 304 // unable to build a proper language identifier 305 output[0] = '\0'; 306 } 307 308 static void setTextLocale(JNIEnv* env, jobject clazz, SkPaint* obj, jstring locale) { 309 ScopedUtfChars localeChars(env, locale); 310 char langTag[ULOC_FULLNAME_CAPACITY]; 311 toLanguageTag(langTag, ULOC_FULLNAME_CAPACITY, localeChars.c_str()); 312 313 SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid(); 314 paintOpts.setLanguage(langTag); 315 obj->setPaintOptionsAndroid(paintOpts); 316 } 317 318 static jfloat getTextSize(JNIEnv* env, jobject paint) { 319 NPE_CHECK_RETURN_ZERO(env, paint); 320 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSize()); 321 } 322 323 static void setTextSize(JNIEnv* env, jobject paint, jfloat textSize) { 324 NPE_CHECK_RETURN_VOID(env, paint); 325 GraphicsJNI::getNativePaint(env, paint)->setTextSize(SkFloatToScalar(textSize)); 326 } 327 328 static jfloat getTextScaleX(JNIEnv* env, jobject paint) { 329 NPE_CHECK_RETURN_ZERO(env, paint); 330 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextScaleX()); 331 } 332 333 static void setTextScaleX(JNIEnv* env, jobject paint, jfloat scaleX) { 334 NPE_CHECK_RETURN_VOID(env, paint); 335 GraphicsJNI::getNativePaint(env, paint)->setTextScaleX(SkFloatToScalar(scaleX)); 336 } 337 338 static jfloat getTextSkewX(JNIEnv* env, jobject paint) { 339 NPE_CHECK_RETURN_ZERO(env, paint); 340 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSkewX()); 341 } 342 343 static void setTextSkewX(JNIEnv* env, jobject paint, jfloat skewX) { 344 NPE_CHECK_RETURN_VOID(env, paint); 345 GraphicsJNI::getNativePaint(env, paint)->setTextSkewX(SkFloatToScalar(skewX)); 346 } 347 348 static jfloat ascent(JNIEnv* env, jobject paint) { 349 NPE_CHECK_RETURN_ZERO(env, paint); 350 SkPaint::FontMetrics metrics; 351 (void)GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 352 return SkScalarToFloat(metrics.fAscent); 353 } 354 355 static jfloat descent(JNIEnv* env, jobject paint) { 356 NPE_CHECK_RETURN_ZERO(env, paint); 357 SkPaint::FontMetrics metrics; 358 (void)GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 359 return SkScalarToFloat(metrics.fDescent); 360 } 361 362 static jfloat getFontMetrics(JNIEnv* env, jobject paint, jobject metricsObj) { 363 NPE_CHECK_RETURN_ZERO(env, paint); 364 SkPaint::FontMetrics metrics; 365 SkScalar spacing = GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 366 367 if (metricsObj) { 368 SkASSERT(env->IsInstanceOf(metricsObj, gFontMetrics_class)); 369 env->SetFloatField(metricsObj, gFontMetrics_fieldID.top, SkScalarToFloat(metrics.fTop)); 370 env->SetFloatField(metricsObj, gFontMetrics_fieldID.ascent, SkScalarToFloat(metrics.fAscent)); 371 env->SetFloatField(metricsObj, gFontMetrics_fieldID.descent, SkScalarToFloat(metrics.fDescent)); 372 env->SetFloatField(metricsObj, gFontMetrics_fieldID.bottom, SkScalarToFloat(metrics.fBottom)); 373 env->SetFloatField(metricsObj, gFontMetrics_fieldID.leading, SkScalarToFloat(metrics.fLeading)); 374 } 375 return SkScalarToFloat(spacing); 376 } 377 378 static jint getFontMetricsInt(JNIEnv* env, jobject paint, jobject metricsObj) { 379 NPE_CHECK_RETURN_ZERO(env, paint); 380 SkPaint::FontMetrics metrics; 381 382 GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 383 int ascent = SkScalarRound(metrics.fAscent); 384 int descent = SkScalarRound(metrics.fDescent); 385 int leading = SkScalarRound(metrics.fLeading); 386 387 if (metricsObj) { 388 SkASSERT(env->IsInstanceOf(metricsObj, gFontMetricsInt_class)); 389 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.top, SkScalarFloor(metrics.fTop)); 390 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.ascent, ascent); 391 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.descent, descent); 392 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.bottom, SkScalarCeil(metrics.fBottom)); 393 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.leading, leading); 394 } 395 return descent - ascent + leading; 396 } 397 398 static jfloat measureText_CIII(JNIEnv* env, jobject jpaint, jcharArray text, int index, int count, 399 jint bidiFlags) { 400 NPE_CHECK_RETURN_ZERO(env, jpaint); 401 NPE_CHECK_RETURN_ZERO(env, text); 402 403 size_t textLength = env->GetArrayLength(text); 404 if ((index | count) < 0 || (size_t)(index + count) > textLength) { 405 doThrowAIOOBE(env); 406 return 0; 407 } 408 if (count == 0) { 409 return 0; 410 } 411 412 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 413 const jchar* textArray = env->GetCharArrayElements(text, NULL); 414 jfloat result = 0; 415 416 TextLayout::getTextRunAdvances(paint, textArray, index, count, textLength, 417 bidiFlags, NULL /* dont need all advances */, &result); 418 419 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); 420 return result; 421 } 422 423 static jfloat measureText_StringIII(JNIEnv* env, jobject jpaint, jstring text, int start, int end, 424 jint bidiFlags) { 425 NPE_CHECK_RETURN_ZERO(env, jpaint); 426 NPE_CHECK_RETURN_ZERO(env, text); 427 428 size_t textLength = env->GetStringLength(text); 429 int count = end - start; 430 if ((start | count) < 0 || (size_t)end > textLength) { 431 doThrowAIOOBE(env); 432 return 0; 433 } 434 if (count == 0) { 435 return 0; 436 } 437 438 const jchar* textArray = env->GetStringChars(text, NULL); 439 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 440 jfloat width = 0; 441 442 TextLayout::getTextRunAdvances(paint, textArray, start, count, textLength, 443 bidiFlags, NULL /* dont need all advances */, &width); 444 445 env->ReleaseStringChars(text, textArray); 446 return width; 447 } 448 449 static jfloat measureText_StringI(JNIEnv* env, jobject jpaint, jstring text, jint bidiFlags) { 450 NPE_CHECK_RETURN_ZERO(env, jpaint); 451 NPE_CHECK_RETURN_ZERO(env, text); 452 453 size_t textLength = env->GetStringLength(text); 454 if (textLength == 0) { 455 return 0; 456 } 457 458 const jchar* textArray = env->GetStringChars(text, NULL); 459 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 460 jfloat width = 0; 461 462 TextLayout::getTextRunAdvances(paint, textArray, 0, textLength, textLength, 463 bidiFlags, NULL /* dont need all advances */, &width); 464 465 env->ReleaseStringChars(text, textArray); 466 return width; 467 } 468 469 static int dotextwidths(JNIEnv* env, SkPaint* paint, const jchar text[], int count, jfloatArray widths, 470 jint bidiFlags) { 471 NPE_CHECK_RETURN_ZERO(env, paint); 472 NPE_CHECK_RETURN_ZERO(env, text); 473 474 if (count < 0 || !widths) { 475 doThrowAIOOBE(env); 476 return 0; 477 } 478 if (count == 0) { 479 return 0; 480 } 481 size_t widthsLength = env->GetArrayLength(widths); 482 if ((size_t)count > widthsLength) { 483 doThrowAIOOBE(env); 484 return 0; 485 } 486 487 AutoJavaFloatArray autoWidths(env, widths, count); 488 jfloat* widthsArray = autoWidths.ptr(); 489 490 TextLayout::getTextRunAdvances(paint, text, 0, count, count, 491 bidiFlags, widthsArray, NULL /* dont need totalAdvance */); 492 493 return count; 494 } 495 496 static int getTextWidths___CIII_F(JNIEnv* env, jobject clazz, SkPaint* paint, jcharArray text, 497 int index, int count, jint bidiFlags, jfloatArray widths) { 498 const jchar* textArray = env->GetCharArrayElements(text, NULL); 499 count = dotextwidths(env, paint, textArray + index, count, widths, bidiFlags); 500 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 501 JNI_ABORT); 502 return count; 503 } 504 505 static int getTextWidths__StringIII_F(JNIEnv* env, jobject clazz, SkPaint* paint, jstring text, 506 int start, int end, jint bidiFlags, jfloatArray widths) { 507 const jchar* textArray = env->GetStringChars(text, NULL); 508 int count = dotextwidths(env, paint, textArray + start, end - start, widths, bidiFlags); 509 env->ReleaseStringChars(text, textArray); 510 return count; 511 } 512 513 static int doTextGlyphs(JNIEnv* env, SkPaint* paint, const jchar* text, jint start, jint count, 514 jint contextCount, jint flags, jcharArray glyphs) { 515 NPE_CHECK_RETURN_ZERO(env, paint); 516 NPE_CHECK_RETURN_ZERO(env, text); 517 518 if ((start | count | contextCount) < 0 || contextCount < count || !glyphs) { 519 doThrowAIOOBE(env); 520 return 0; 521 } 522 if (count == 0) { 523 return 0; 524 } 525 size_t glypthsLength = env->GetArrayLength(glyphs); 526 if ((size_t)count > glypthsLength) { 527 doThrowAIOOBE(env); 528 return 0; 529 } 530 531 jchar* glyphsArray = env->GetCharArrayElements(glyphs, NULL); 532 533 sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(paint, 534 text, start, count, contextCount, flags); 535 const jchar* shapedGlyphs = value->getGlyphs(); 536 size_t glyphsCount = value->getGlyphsCount(); 537 memcpy(glyphsArray, shapedGlyphs, sizeof(jchar) * glyphsCount); 538 539 env->ReleaseCharArrayElements(glyphs, glyphsArray, JNI_ABORT); 540 return glyphsCount; 541 } 542 543 static int getTextGlyphs__StringIIIII_C(JNIEnv* env, jobject clazz, SkPaint* paint, 544 jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags, 545 jcharArray glyphs) { 546 const jchar* textArray = env->GetStringChars(text, NULL); 547 int count = doTextGlyphs(env, paint, textArray + contextStart, start - contextStart, 548 end - start, contextEnd - contextStart, flags, glyphs); 549 env->ReleaseStringChars(text, textArray); 550 return count; 551 } 552 553 static jfloat doTextRunAdvances(JNIEnv *env, SkPaint *paint, const jchar *text, 554 jint start, jint count, jint contextCount, jint flags, 555 jfloatArray advances, jint advancesIndex) { 556 NPE_CHECK_RETURN_ZERO(env, paint); 557 NPE_CHECK_RETURN_ZERO(env, text); 558 559 if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) { 560 doThrowAIOOBE(env); 561 return 0; 562 } 563 if (count == 0) { 564 return 0; 565 } 566 if (advances) { 567 size_t advancesLength = env->GetArrayLength(advances); 568 if ((size_t)count > advancesLength) { 569 doThrowAIOOBE(env); 570 return 0; 571 } 572 } 573 jfloat advancesArray[count]; 574 jfloat totalAdvance = 0; 575 576 TextLayout::getTextRunAdvances(paint, text, start, count, contextCount, flags, 577 advancesArray, &totalAdvance); 578 579 if (advances != NULL) { 580 env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray); 581 } 582 return totalAdvance; 583 } 584 585 static float getTextRunAdvances___CIIIII_FI(JNIEnv* env, jobject clazz, SkPaint* paint, 586 jcharArray text, jint index, jint count, jint contextIndex, jint contextCount, 587 jint flags, jfloatArray advances, jint advancesIndex) { 588 jchar* textArray = env->GetCharArrayElements(text, NULL); 589 jfloat result = doTextRunAdvances(env, paint, textArray + contextIndex, 590 index - contextIndex, count, contextCount, flags, advances, advancesIndex); 591 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 592 return result; 593 } 594 595 static float getTextRunAdvances__StringIIIII_FI(JNIEnv* env, jobject clazz, SkPaint* paint, 596 jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags, 597 jfloatArray advances, jint advancesIndex) { 598 const jchar* textArray = env->GetStringChars(text, NULL); 599 jfloat result = doTextRunAdvances(env, paint, textArray + contextStart, 600 start - contextStart, end - start, contextEnd - contextStart, flags, 601 advances, advancesIndex); 602 env->ReleaseStringChars(text, textArray); 603 return result; 604 } 605 606 static jint doTextRunCursor(JNIEnv *env, SkPaint* paint, const jchar *text, jint start, 607 jint count, jint flags, jint offset, jint opt) { 608 jfloat scalarArray[count]; 609 610 TextLayout::getTextRunAdvances(paint, text, start, count, start + count, flags, 611 scalarArray, NULL /* dont need totalAdvance */); 612 613 jint pos = offset - start; 614 switch (opt) { 615 case AFTER: 616 if (pos < count) { 617 pos += 1; 618 } 619 // fall through 620 case AT_OR_AFTER: 621 while (pos < count && scalarArray[pos] == 0) { 622 ++pos; 623 } 624 break; 625 case BEFORE: 626 if (pos > 0) { 627 --pos; 628 } 629 // fall through 630 case AT_OR_BEFORE: 631 while (pos > 0 && scalarArray[pos] == 0) { 632 --pos; 633 } 634 break; 635 case AT: 636 default: 637 if (scalarArray[pos] == 0) { 638 pos = -1; 639 } 640 break; 641 } 642 643 if (pos != -1) { 644 pos += start; 645 } 646 647 return pos; 648 } 649 650 static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, SkPaint* paint, jcharArray text, 651 jint contextStart, jint contextCount, jint flags, jint offset, jint cursorOpt) { 652 jchar* textArray = env->GetCharArrayElements(text, NULL); 653 jint result = doTextRunCursor(env, paint, textArray, contextStart, contextCount, flags, 654 offset, cursorOpt); 655 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 656 return result; 657 } 658 659 static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, SkPaint* paint, jstring text, 660 jint contextStart, jint contextEnd, jint flags, jint offset, jint cursorOpt) { 661 const jchar* textArray = env->GetStringChars(text, NULL); 662 jint result = doTextRunCursor(env, paint, textArray, contextStart, 663 contextEnd - contextStart, flags, offset, cursorOpt); 664 env->ReleaseStringChars(text, textArray); 665 return result; 666 } 667 668 static void getTextPath(JNIEnv* env, SkPaint* paint, const jchar* text, jint count, 669 jint bidiFlags, jfloat x, jfloat y, SkPath *path) { 670 TextLayout::getTextPath(paint, text, count, bidiFlags, x, y, path); 671 } 672 673 static void getTextPath___C(JNIEnv* env, jobject clazz, SkPaint* paint, jint bidiFlags, 674 jcharArray text, int index, int count, jfloat x, jfloat y, SkPath* path) { 675 const jchar* textArray = env->GetCharArrayElements(text, NULL); 676 getTextPath(env, paint, textArray + index, count, bidiFlags, x, y, path); 677 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); 678 } 679 680 static void getTextPath__String(JNIEnv* env, jobject clazz, SkPaint* paint, jint bidiFlags, 681 jstring text, int start, int end, jfloat x, jfloat y, SkPath* path) { 682 const jchar* textArray = env->GetStringChars(text, NULL); 683 getTextPath(env, paint, textArray + start, end - start, bidiFlags, x, y, path); 684 env->ReleaseStringChars(text, textArray); 685 } 686 687 static void setShadowLayer(JNIEnv* env, jobject jpaint, jfloat radius, 688 jfloat dx, jfloat dy, int color) { 689 NPE_CHECK_RETURN_VOID(env, jpaint); 690 691 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 692 if (radius <= 0) { 693 paint->setLooper(NULL); 694 } 695 else { 696 paint->setLooper(new SkBlurDrawLooper(SkFloatToScalar(radius), 697 SkFloatToScalar(dx), 698 SkFloatToScalar(dy), 699 (SkColor)color))->unref(); 700 } 701 } 702 703 static int breakText(JNIEnv* env, SkPaint& paint, const jchar text[], 704 int count, float maxWidth, jint bidiFlags, jfloatArray jmeasured, 705 SkPaint::TextBufferDirection tbd) { 706 sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(&paint, 707 text, 0, count, count, bidiFlags); 708 if (value == NULL) { 709 return 0; 710 } 711 SkScalar measured; 712 size_t bytes = paint.breakText(value->getGlyphs(), value->getGlyphsCount() << 1, 713 SkFloatToScalar(maxWidth), &measured, tbd); 714 SkASSERT((bytes & 1) == 0); 715 716 if (jmeasured && env->GetArrayLength(jmeasured) > 0) { 717 AutoJavaFloatArray autoMeasured(env, jmeasured, 1); 718 jfloat* array = autoMeasured.ptr(); 719 array[0] = SkScalarToFloat(measured); 720 } 721 return bytes >> 1; 722 } 723 724 static int breakTextC(JNIEnv* env, jobject jpaint, jcharArray jtext, 725 int index, int count, float maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) { 726 NPE_CHECK_RETURN_ZERO(env, jpaint); 727 NPE_CHECK_RETURN_ZERO(env, jtext); 728 729 SkPaint::TextBufferDirection tbd; 730 if (count < 0) { 731 tbd = SkPaint::kBackward_TextBufferDirection; 732 count = -count; 733 } 734 else { 735 tbd = SkPaint::kForward_TextBufferDirection; 736 } 737 738 if ((index < 0) || (index + count > env->GetArrayLength(jtext))) { 739 doThrowAIOOBE(env); 740 return 0; 741 } 742 743 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 744 const jchar* text = env->GetCharArrayElements(jtext, NULL); 745 count = breakText(env, *paint, text + index, count, maxWidth, 746 bidiFlags, jmeasuredWidth, tbd); 747 env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text), 748 JNI_ABORT); 749 return count; 750 } 751 752 static int breakTextS(JNIEnv* env, jobject jpaint, jstring jtext, 753 bool forwards, float maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) { 754 NPE_CHECK_RETURN_ZERO(env, jpaint); 755 NPE_CHECK_RETURN_ZERO(env, jtext); 756 757 SkPaint::TextBufferDirection tbd = forwards ? 758 SkPaint::kForward_TextBufferDirection : 759 SkPaint::kBackward_TextBufferDirection; 760 761 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 762 int count = env->GetStringLength(jtext); 763 const jchar* text = env->GetStringChars(jtext, NULL); 764 count = breakText(env, *paint, text, count, maxWidth, bidiFlags, jmeasuredWidth, tbd); 765 env->ReleaseStringChars(jtext, text); 766 return count; 767 } 768 769 static void doTextBounds(JNIEnv* env, const jchar* text, int count, 770 jobject bounds, const SkPaint& paint, jint bidiFlags) { 771 SkRect r; 772 SkIRect ir; 773 774 sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(&paint, 775 text, 0, count, count, bidiFlags); 776 if (value == NULL) { 777 return; 778 } 779 paint.measureText(value->getGlyphs(), value->getGlyphsCount() << 1, &r); 780 r.roundOut(&ir); 781 GraphicsJNI::irect_to_jrect(ir, env, bounds); 782 } 783 784 static void getStringBounds(JNIEnv* env, jobject, const SkPaint* paint, 785 jstring text, int start, int end, jint bidiFlags, jobject bounds) { 786 const jchar* textArray = env->GetStringChars(text, NULL); 787 doTextBounds(env, textArray + start, end - start, bounds, *paint, bidiFlags); 788 env->ReleaseStringChars(text, textArray); 789 } 790 791 static void getCharArrayBounds(JNIEnv* env, jobject, const SkPaint* paint, 792 jcharArray text, int index, int count, jint bidiFlags, jobject bounds) { 793 const jchar* textArray = env->GetCharArrayElements(text, NULL); 794 doTextBounds(env, textArray + index, count, bounds, *paint, bidiFlags); 795 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 796 JNI_ABORT); 797 } 798 799}; 800 801static JNINativeMethod methods[] = { 802 {"finalizer", "(I)V", (void*) SkPaintGlue::finalizer}, 803 {"native_init","()I", (void*) SkPaintGlue::init}, 804 {"native_initWithPaint","(I)I", (void*) SkPaintGlue::intiWithPaint}, 805 {"native_reset","(I)V", (void*) SkPaintGlue::reset}, 806 {"native_set","(II)V", (void*) SkPaintGlue::assign}, 807 {"getFlags","()I", (void*) SkPaintGlue::getFlags}, 808 {"setFlags","(I)V", (void*) SkPaintGlue::setFlags}, 809 {"getHinting","()I", (void*) SkPaintGlue::getHinting}, 810 {"setHinting","(I)V", (void*) SkPaintGlue::setHinting}, 811 {"setAntiAlias","(Z)V", (void*) SkPaintGlue::setAntiAlias}, 812 {"setSubpixelText","(Z)V", (void*) SkPaintGlue::setSubpixelText}, 813 {"setLinearText","(Z)V", (void*) SkPaintGlue::setLinearText}, 814 {"setUnderlineText","(Z)V", (void*) SkPaintGlue::setUnderlineText}, 815 {"setStrikeThruText","(Z)V", (void*) SkPaintGlue::setStrikeThruText}, 816 {"setFakeBoldText","(Z)V", (void*) SkPaintGlue::setFakeBoldText}, 817 {"setFilterBitmap","(Z)V", (void*) SkPaintGlue::setFilterBitmap}, 818 {"setDither","(Z)V", (void*) SkPaintGlue::setDither}, 819 {"native_getStyle","(I)I", (void*) SkPaintGlue::getStyle}, 820 {"native_setStyle","(II)V", (void*) SkPaintGlue::setStyle}, 821 {"getColor","()I", (void*) SkPaintGlue::getColor}, 822 {"setColor","(I)V", (void*) SkPaintGlue::setColor}, 823 {"getAlpha","()I", (void*) SkPaintGlue::getAlpha}, 824 {"setAlpha","(I)V", (void*) SkPaintGlue::setAlpha}, 825 {"getStrokeWidth","()F", (void*) SkPaintGlue::getStrokeWidth}, 826 {"setStrokeWidth","(F)V", (void*) SkPaintGlue::setStrokeWidth}, 827 {"getStrokeMiter","()F", (void*) SkPaintGlue::getStrokeMiter}, 828 {"setStrokeMiter","(F)V", (void*) SkPaintGlue::setStrokeMiter}, 829 {"native_getStrokeCap","(I)I", (void*) SkPaintGlue::getStrokeCap}, 830 {"native_setStrokeCap","(II)V", (void*) SkPaintGlue::setStrokeCap}, 831 {"native_getStrokeJoin","(I)I", (void*) SkPaintGlue::getStrokeJoin}, 832 {"native_setStrokeJoin","(II)V", (void*) SkPaintGlue::setStrokeJoin}, 833 {"native_getFillPath","(III)Z", (void*) SkPaintGlue::getFillPath}, 834 {"native_setShader","(II)I", (void*) SkPaintGlue::setShader}, 835 {"native_setColorFilter","(II)I", (void*) SkPaintGlue::setColorFilter}, 836 {"native_setXfermode","(II)I", (void*) SkPaintGlue::setXfermode}, 837 {"native_setPathEffect","(II)I", (void*) SkPaintGlue::setPathEffect}, 838 {"native_setMaskFilter","(II)I", (void*) SkPaintGlue::setMaskFilter}, 839 {"native_setTypeface","(II)I", (void*) SkPaintGlue::setTypeface}, 840 {"native_setRasterizer","(II)I", (void*) SkPaintGlue::setRasterizer}, 841 {"native_getTextAlign","(I)I", (void*) SkPaintGlue::getTextAlign}, 842 {"native_setTextAlign","(II)V", (void*) SkPaintGlue::setTextAlign}, 843 {"native_setTextLocale","(ILjava/lang/String;)V", (void*) SkPaintGlue::setTextLocale}, 844 {"getTextSize","()F", (void*) SkPaintGlue::getTextSize}, 845 {"setTextSize","(F)V", (void*) SkPaintGlue::setTextSize}, 846 {"getTextScaleX","()F", (void*) SkPaintGlue::getTextScaleX}, 847 {"setTextScaleX","(F)V", (void*) SkPaintGlue::setTextScaleX}, 848 {"getTextSkewX","()F", (void*) SkPaintGlue::getTextSkewX}, 849 {"setTextSkewX","(F)V", (void*) SkPaintGlue::setTextSkewX}, 850 {"ascent","()F", (void*) SkPaintGlue::ascent}, 851 {"descent","()F", (void*) SkPaintGlue::descent}, 852 {"getFontMetrics", "(Landroid/graphics/Paint$FontMetrics;)F", (void*)SkPaintGlue::getFontMetrics}, 853 {"getFontMetricsInt", "(Landroid/graphics/Paint$FontMetricsInt;)I", (void*)SkPaintGlue::getFontMetricsInt}, 854 {"native_measureText","([CIII)F", (void*) SkPaintGlue::measureText_CIII}, 855 {"native_measureText","(Ljava/lang/String;I)F", (void*) SkPaintGlue::measureText_StringI}, 856 {"native_measureText","(Ljava/lang/String;III)F", (void*) SkPaintGlue::measureText_StringIII}, 857 {"native_breakText","([CIIFI[F)I", (void*) SkPaintGlue::breakTextC}, 858 {"native_breakText","(Ljava/lang/String;ZFI[F)I", (void*) SkPaintGlue::breakTextS}, 859 {"native_getTextWidths","(I[CIII[F)I", (void*) SkPaintGlue::getTextWidths___CIII_F}, 860 {"native_getTextWidths","(ILjava/lang/String;III[F)I", (void*) SkPaintGlue::getTextWidths__StringIII_F}, 861 {"native_getTextRunAdvances","(I[CIIIII[FI)F", 862 (void*) SkPaintGlue::getTextRunAdvances___CIIIII_FI}, 863 {"native_getTextRunAdvances","(ILjava/lang/String;IIIII[FI)F", 864 (void*) SkPaintGlue::getTextRunAdvances__StringIIIII_FI}, 865 866 867 {"native_getTextGlyphs","(ILjava/lang/String;IIIII[C)I", 868 (void*) SkPaintGlue::getTextGlyphs__StringIIIII_C}, 869 {"native_getTextRunCursor", "(I[CIIIII)I", (void*) SkPaintGlue::getTextRunCursor___C}, 870 {"native_getTextRunCursor", "(ILjava/lang/String;IIIII)I", 871 (void*) SkPaintGlue::getTextRunCursor__String}, 872 {"native_getTextPath","(II[CIIFFI)V", (void*) SkPaintGlue::getTextPath___C}, 873 {"native_getTextPath","(IILjava/lang/String;IIFFI)V", (void*) SkPaintGlue::getTextPath__String}, 874 {"nativeGetStringBounds", "(ILjava/lang/String;IIILandroid/graphics/Rect;)V", 875 (void*) SkPaintGlue::getStringBounds }, 876 {"nativeGetCharArrayBounds", "(I[CIIILandroid/graphics/Rect;)V", 877 (void*) SkPaintGlue::getCharArrayBounds }, 878 {"nSetShadowLayer", "(FFFI)V", (void*)SkPaintGlue::setShadowLayer} 879}; 880 881static jfieldID req_fieldID(jfieldID id) { 882 SkASSERT(id); 883 return id; 884} 885 886int register_android_graphics_Paint(JNIEnv* env) { 887 gFontMetrics_class = env->FindClass("android/graphics/Paint$FontMetrics"); 888 SkASSERT(gFontMetrics_class); 889 gFontMetrics_class = (jclass)env->NewGlobalRef(gFontMetrics_class); 890 891 gFontMetrics_fieldID.top = req_fieldID(env->GetFieldID(gFontMetrics_class, "top", "F")); 892 gFontMetrics_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetrics_class, "ascent", "F")); 893 gFontMetrics_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetrics_class, "descent", "F")); 894 gFontMetrics_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetrics_class, "bottom", "F")); 895 gFontMetrics_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetrics_class, "leading", "F")); 896 897 gFontMetricsInt_class = env->FindClass("android/graphics/Paint$FontMetricsInt"); 898 SkASSERT(gFontMetricsInt_class); 899 gFontMetricsInt_class = (jclass)env->NewGlobalRef(gFontMetricsInt_class); 900 901 gFontMetricsInt_fieldID.top = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "top", "I")); 902 gFontMetricsInt_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "ascent", "I")); 903 gFontMetricsInt_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "descent", "I")); 904 gFontMetricsInt_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "bottom", "I")); 905 gFontMetricsInt_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "leading", "I")); 906 907 int result = AndroidRuntime::registerNativeMethods(env, "android/graphics/Paint", methods, 908 sizeof(methods) / sizeof(methods[0])); 909 return result; 910} 911 912} 913