Paint.cpp revision c511bee87cda99a252d1a62487f47c8f05aee78c
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 40namespace android { 41 42struct JMetricsID { 43 jfieldID top; 44 jfieldID ascent; 45 jfieldID descent; 46 jfieldID bottom; 47 jfieldID leading; 48}; 49 50static jclass gFontMetrics_class; 51static JMetricsID gFontMetrics_fieldID; 52 53static jclass gFontMetricsInt_class; 54static JMetricsID gFontMetricsInt_fieldID; 55 56static void defaultSettingsForAndroid(SkPaint* paint) { 57 // GlyphID encoding is required because we are using Harfbuzz shaping 58 paint->setTextEncoding(SkPaint::kGlyphID_TextEncoding); 59} 60 61class SkPaintGlue { 62public: 63 enum MoveOpt { 64 AFTER, AT_OR_AFTER, BEFORE, AT_OR_BEFORE, AT 65 }; 66 67 static void finalizer(JNIEnv* env, jobject clazz, SkPaint* obj) { 68 delete obj; 69 } 70 71 static SkPaint* init(JNIEnv* env, jobject clazz) { 72 SkPaint* obj = new SkPaint(); 73 defaultSettingsForAndroid(obj); 74 return obj; 75 } 76 77 static SkPaint* intiWithPaint(JNIEnv* env, jobject clazz, SkPaint* paint) { 78 SkPaint* obj = new SkPaint(*paint); 79 return obj; 80 } 81 82 static void reset(JNIEnv* env, jobject clazz, SkPaint* obj) { 83 obj->reset(); 84 defaultSettingsForAndroid(obj); 85 } 86 87 static void assign(JNIEnv* env, jobject clazz, SkPaint* dst, const SkPaint* src) { 88 *dst = *src; 89 } 90 91 static jint getFlags(JNIEnv* env, jobject paint) { 92 NPE_CHECK_RETURN_ZERO(env, paint); 93 return GraphicsJNI::getNativePaint(env, paint)->getFlags(); 94 } 95 96 static void setFlags(JNIEnv* env, jobject paint, jint flags) { 97 NPE_CHECK_RETURN_VOID(env, paint); 98 GraphicsJNI::getNativePaint(env, paint)->setFlags(flags); 99 } 100 101 static jint getHinting(JNIEnv* env, jobject paint) { 102 NPE_CHECK_RETURN_ZERO(env, paint); 103 return GraphicsJNI::getNativePaint(env, paint)->getHinting() 104 == SkPaint::kNo_Hinting ? 0 : 1; 105 } 106 107 static void setHinting(JNIEnv* env, jobject paint, jint mode) { 108 NPE_CHECK_RETURN_VOID(env, paint); 109 GraphicsJNI::getNativePaint(env, paint)->setHinting( 110 mode == 0 ? SkPaint::kNo_Hinting : SkPaint::kSlight_Hinting); 111 } 112 113 static void setAntiAlias(JNIEnv* env, jobject paint, jboolean aa) { 114 NPE_CHECK_RETURN_VOID(env, paint); 115 GraphicsJNI::getNativePaint(env, paint)->setAntiAlias(aa); 116 } 117 118 static void setLinearText(JNIEnv* env, jobject paint, jboolean linearText) { 119 NPE_CHECK_RETURN_VOID(env, paint); 120 GraphicsJNI::getNativePaint(env, paint)->setLinearText(linearText); 121 } 122 123 static void setSubpixelText(JNIEnv* env, jobject paint, jboolean subpixelText) { 124 NPE_CHECK_RETURN_VOID(env, paint); 125 GraphicsJNI::getNativePaint(env, paint)->setSubpixelText(subpixelText); 126 } 127 128 static void setUnderlineText(JNIEnv* env, jobject paint, jboolean underlineText) { 129 NPE_CHECK_RETURN_VOID(env, paint); 130 GraphicsJNI::getNativePaint(env, paint)->setUnderlineText(underlineText); 131 } 132 133 static void setStrikeThruText(JNIEnv* env, jobject paint, jboolean strikeThruText) { 134 NPE_CHECK_RETURN_VOID(env, paint); 135 GraphicsJNI::getNativePaint(env, paint)->setStrikeThruText(strikeThruText); 136 } 137 138 static void setFakeBoldText(JNIEnv* env, jobject paint, jboolean fakeBoldText) { 139 NPE_CHECK_RETURN_VOID(env, paint); 140 GraphicsJNI::getNativePaint(env, paint)->setFakeBoldText(fakeBoldText); 141 } 142 143 static void setFilterBitmap(JNIEnv* env, jobject paint, jboolean filterBitmap) { 144 NPE_CHECK_RETURN_VOID(env, paint); 145 GraphicsJNI::getNativePaint(env, paint)->setFilterBitmap(filterBitmap); 146 } 147 148 static void setDither(JNIEnv* env, jobject paint, jboolean dither) { 149 NPE_CHECK_RETURN_VOID(env, paint); 150 GraphicsJNI::getNativePaint(env, paint)->setDither(dither); 151 } 152 153 static jint getStyle(JNIEnv* env, jobject clazz, SkPaint* obj) { 154 return obj->getStyle(); 155 } 156 157 static void setStyle(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Style style) { 158 obj->setStyle(style); 159 } 160 161 static jint getColor(JNIEnv* env, jobject paint) { 162 NPE_CHECK_RETURN_ZERO(env, paint); 163 return GraphicsJNI::getNativePaint(env, paint)->getColor(); 164 } 165 166 static jint getAlpha(JNIEnv* env, jobject paint) { 167 NPE_CHECK_RETURN_ZERO(env, paint); 168 return GraphicsJNI::getNativePaint(env, paint)->getAlpha(); 169 } 170 171 static void setColor(JNIEnv* env, jobject paint, jint color) { 172 NPE_CHECK_RETURN_VOID(env, paint); 173 GraphicsJNI::getNativePaint(env, paint)->setColor(color); 174 } 175 176 static void setAlpha(JNIEnv* env, jobject paint, jint a) { 177 NPE_CHECK_RETURN_VOID(env, paint); 178 GraphicsJNI::getNativePaint(env, paint)->setAlpha(a); 179 } 180 181 static jfloat getStrokeWidth(JNIEnv* env, jobject paint) { 182 NPE_CHECK_RETURN_ZERO(env, paint); 183 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeWidth()); 184 } 185 186 static void setStrokeWidth(JNIEnv* env, jobject paint, jfloat width) { 187 NPE_CHECK_RETURN_VOID(env, paint); 188 GraphicsJNI::getNativePaint(env, paint)->setStrokeWidth(SkFloatToScalar(width)); 189 } 190 191 static jfloat getStrokeMiter(JNIEnv* env, jobject paint) { 192 NPE_CHECK_RETURN_ZERO(env, paint); 193 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeMiter()); 194 } 195 196 static void setStrokeMiter(JNIEnv* env, jobject paint, jfloat miter) { 197 NPE_CHECK_RETURN_VOID(env, paint); 198 GraphicsJNI::getNativePaint(env, paint)->setStrokeMiter(SkFloatToScalar(miter)); 199 } 200 201 static jint getStrokeCap(JNIEnv* env, jobject clazz, SkPaint* obj) { 202 return obj->getStrokeCap(); 203 } 204 205 static void setStrokeCap(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Cap cap) { 206 obj->setStrokeCap(cap); 207 } 208 209 static jint getStrokeJoin(JNIEnv* env, jobject clazz, SkPaint* obj) { 210 return obj->getStrokeJoin(); 211 } 212 213 static void setStrokeJoin(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Join join) { 214 obj->setStrokeJoin(join); 215 } 216 217 static jboolean getFillPath(JNIEnv* env, jobject clazz, SkPaint* obj, SkPath* src, SkPath* dst) { 218 return obj->getFillPath(*src, dst); 219 } 220 221 static SkShader* setShader(JNIEnv* env, jobject clazz, SkPaint* obj, SkShader* shader) { 222 return obj->setShader(shader); 223 } 224 225 static SkColorFilter* setColorFilter(JNIEnv* env, jobject clazz, SkPaint* obj, SkColorFilter* filter) { 226 return obj->setColorFilter(filter); 227 } 228 229 static SkXfermode* setXfermode(JNIEnv* env, jobject clazz, SkPaint* obj, SkXfermode* xfermode) { 230 return obj->setXfermode(xfermode); 231 } 232 233 static SkPathEffect* setPathEffect(JNIEnv* env, jobject clazz, SkPaint* obj, SkPathEffect* effect) { 234 return obj->setPathEffect(effect); 235 } 236 237 static SkMaskFilter* setMaskFilter(JNIEnv* env, jobject clazz, SkPaint* obj, SkMaskFilter* maskfilter) { 238 return obj->setMaskFilter(maskfilter); 239 } 240 241 static SkTypeface* setTypeface(JNIEnv* env, jobject clazz, SkPaint* obj, SkTypeface* typeface) { 242 return obj->setTypeface(typeface); 243 } 244 245 static SkRasterizer* setRasterizer(JNIEnv* env, jobject clazz, SkPaint* obj, SkRasterizer* rasterizer) { 246 return obj->setRasterizer(rasterizer); 247 } 248 249 static jint getTextAlign(JNIEnv* env, jobject clazz, SkPaint* obj) { 250 return obj->getTextAlign(); 251 } 252 253 static void setTextAlign(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Align align) { 254 obj->setTextAlign(align); 255 } 256 257 static jfloat getTextSize(JNIEnv* env, jobject paint) { 258 NPE_CHECK_RETURN_ZERO(env, paint); 259 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSize()); 260 } 261 262 static void setTextSize(JNIEnv* env, jobject paint, jfloat textSize) { 263 NPE_CHECK_RETURN_VOID(env, paint); 264 GraphicsJNI::getNativePaint(env, paint)->setTextSize(SkFloatToScalar(textSize)); 265 } 266 267 static jfloat getTextScaleX(JNIEnv* env, jobject paint) { 268 NPE_CHECK_RETURN_ZERO(env, paint); 269 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextScaleX()); 270 } 271 272 static void setTextScaleX(JNIEnv* env, jobject paint, jfloat scaleX) { 273 NPE_CHECK_RETURN_VOID(env, paint); 274 GraphicsJNI::getNativePaint(env, paint)->setTextScaleX(SkFloatToScalar(scaleX)); 275 } 276 277 static jfloat getTextSkewX(JNIEnv* env, jobject paint) { 278 NPE_CHECK_RETURN_ZERO(env, paint); 279 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSkewX()); 280 } 281 282 static void setTextSkewX(JNIEnv* env, jobject paint, jfloat skewX) { 283 NPE_CHECK_RETURN_VOID(env, paint); 284 GraphicsJNI::getNativePaint(env, paint)->setTextSkewX(SkFloatToScalar(skewX)); 285 } 286 287 static jfloat ascent(JNIEnv* env, jobject paint) { 288 NPE_CHECK_RETURN_ZERO(env, paint); 289 SkPaint::FontMetrics metrics; 290 (void)GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 291 return SkScalarToFloat(metrics.fAscent); 292 } 293 294 static jfloat descent(JNIEnv* env, jobject paint) { 295 NPE_CHECK_RETURN_ZERO(env, paint); 296 SkPaint::FontMetrics metrics; 297 (void)GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 298 return SkScalarToFloat(metrics.fDescent); 299 } 300 301 static jfloat getFontMetrics(JNIEnv* env, jobject paint, jobject metricsObj) { 302 NPE_CHECK_RETURN_ZERO(env, paint); 303 SkPaint::FontMetrics metrics; 304 SkScalar spacing = GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 305 306 if (metricsObj) { 307 SkASSERT(env->IsInstanceOf(metricsObj, gFontMetrics_class)); 308 env->SetFloatField(metricsObj, gFontMetrics_fieldID.top, SkScalarToFloat(metrics.fTop)); 309 env->SetFloatField(metricsObj, gFontMetrics_fieldID.ascent, SkScalarToFloat(metrics.fAscent)); 310 env->SetFloatField(metricsObj, gFontMetrics_fieldID.descent, SkScalarToFloat(metrics.fDescent)); 311 env->SetFloatField(metricsObj, gFontMetrics_fieldID.bottom, SkScalarToFloat(metrics.fBottom)); 312 env->SetFloatField(metricsObj, gFontMetrics_fieldID.leading, SkScalarToFloat(metrics.fLeading)); 313 } 314 return SkScalarToFloat(spacing); 315 } 316 317 static jint getFontMetricsInt(JNIEnv* env, jobject paint, jobject metricsObj) { 318 NPE_CHECK_RETURN_ZERO(env, paint); 319 SkPaint::FontMetrics metrics; 320 321 GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 322 int ascent = SkScalarRound(metrics.fAscent); 323 int descent = SkScalarRound(metrics.fDescent); 324 int leading = SkScalarRound(metrics.fLeading); 325 326 if (metricsObj) { 327 SkASSERT(env->IsInstanceOf(metricsObj, gFontMetricsInt_class)); 328 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.top, SkScalarFloor(metrics.fTop)); 329 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.ascent, ascent); 330 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.descent, descent); 331 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.bottom, SkScalarCeil(metrics.fBottom)); 332 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.leading, leading); 333 } 334 return descent - ascent + leading; 335 } 336 337 static jfloat measureText_CII(JNIEnv* env, jobject jpaint, jcharArray text, int index, int count) { 338 NPE_CHECK_RETURN_ZERO(env, jpaint); 339 NPE_CHECK_RETURN_ZERO(env, text); 340 341 size_t textLength = env->GetArrayLength(text); 342 if ((index | count) < 0 || (size_t)(index + count) > textLength) { 343 doThrowAIOOBE(env); 344 return 0; 345 } 346 if (count == 0) { 347 return 0; 348 } 349 350 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 351 const jchar* textArray = env->GetCharArrayElements(text, NULL); 352 jfloat result = 0; 353 354 TextLayout::getTextRunAdvances(paint, textArray, index, count, textLength, 355 paint->getFlags(), NULL /* dont need all advances */, &result); 356 357 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); 358 return result; 359 } 360 361 static jfloat measureText_StringII(JNIEnv* env, jobject jpaint, jstring text, int start, int end) { 362 NPE_CHECK_RETURN_ZERO(env, jpaint); 363 NPE_CHECK_RETURN_ZERO(env, text); 364 365 size_t textLength = env->GetStringLength(text); 366 int count = end - start; 367 if ((start | count) < 0 || (size_t)end > textLength) { 368 doThrowAIOOBE(env); 369 return 0; 370 } 371 if (count == 0) { 372 return 0; 373 } 374 375 const jchar* textArray = env->GetStringChars(text, NULL); 376 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 377 jfloat width = 0; 378 379 TextLayout::getTextRunAdvances(paint, textArray, start, count, textLength, 380 paint->getFlags(), NULL /* dont need all advances */, &width); 381 382 env->ReleaseStringChars(text, textArray); 383 return width; 384 } 385 386 static jfloat measureText_String(JNIEnv* env, jobject jpaint, jstring text) { 387 NPE_CHECK_RETURN_ZERO(env, jpaint); 388 NPE_CHECK_RETURN_ZERO(env, text); 389 390 size_t textLength = env->GetStringLength(text); 391 if (textLength == 0) { 392 return 0; 393 } 394 395 const jchar* textArray = env->GetStringChars(text, NULL); 396 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 397 jfloat width = 0; 398 399 TextLayout::getTextRunAdvances(paint, textArray, 0, textLength, textLength, 400 paint->getFlags(), NULL /* dont need all advances */, &width); 401 402 env->ReleaseStringChars(text, textArray); 403 return width; 404 } 405 406 static int dotextwidths(JNIEnv* env, SkPaint* paint, const jchar text[], int count, jfloatArray widths) { 407 NPE_CHECK_RETURN_ZERO(env, paint); 408 NPE_CHECK_RETURN_ZERO(env, text); 409 410 if (count < 0 || !widths) { 411 doThrowAIOOBE(env); 412 return 0; 413 } 414 if (count == 0) { 415 return 0; 416 } 417 size_t widthsLength = env->GetArrayLength(widths); 418 if ((size_t)count > widthsLength) { 419 doThrowAIOOBE(env); 420 return 0; 421 } 422 423 AutoJavaFloatArray autoWidths(env, widths, count); 424 jfloat* widthsArray = autoWidths.ptr(); 425 426 TextLayout::getTextRunAdvances(paint, text, 0, count, count, 427 paint->getFlags(), widthsArray, NULL /* dont need totalAdvance */); 428 429 return count; 430 } 431 432 static int getTextWidths___CII_F(JNIEnv* env, jobject clazz, SkPaint* paint, jcharArray text, int index, int count, jfloatArray widths) { 433 const jchar* textArray = env->GetCharArrayElements(text, NULL); 434 count = dotextwidths(env, paint, textArray + index, count, widths); 435 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 436 JNI_ABORT); 437 return count; 438 } 439 440 static int getTextWidths__StringII_F(JNIEnv* env, jobject clazz, SkPaint* paint, jstring text, 441 int start, int end, jfloatArray widths) { 442 const jchar* textArray = env->GetStringChars(text, NULL); 443 int count = dotextwidths(env, paint, textArray + start, end - start, widths); 444 env->ReleaseStringChars(text, textArray); 445 return count; 446 } 447 448 static int doTextGlyphs(JNIEnv* env, SkPaint* paint, const jchar* text, jint start, jint count, 449 jint contextCount, jint flags, jcharArray glyphs) { 450 NPE_CHECK_RETURN_ZERO(env, paint); 451 NPE_CHECK_RETURN_ZERO(env, text); 452 453 if ((start | count | contextCount) < 0 || contextCount < count || !glyphs) { 454 doThrowAIOOBE(env); 455 return 0; 456 } 457 if (count == 0) { 458 return 0; 459 } 460 size_t glypthsLength = env->GetArrayLength(glyphs); 461 if ((size_t)count > glypthsLength) { 462 doThrowAIOOBE(env); 463 return 0; 464 } 465 466 jchar* glyphsArray = env->GetCharArrayElements(glyphs, NULL); 467 468 TextLayoutCacheValue value(contextCount); 469 TextLayoutEngine::getInstance().computeValues(&value, paint, text, start, count, contextCount, flags); 470 const jchar* shapedGlyphs = value.getGlyphs(); 471 size_t glyphsCount = value.getGlyphsCount(); 472 memcpy(glyphsArray, shapedGlyphs, sizeof(jchar) * glyphsCount); 473 474 env->ReleaseCharArrayElements(glyphs, glyphsArray, JNI_ABORT); 475 return glyphsCount; 476 } 477 478 static int getTextGlyphs__StringIIIII_C(JNIEnv* env, jobject clazz, SkPaint* paint, 479 jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags, 480 jcharArray glyphs) { 481 const jchar* textArray = env->GetStringChars(text, NULL); 482 int count = doTextGlyphs(env, paint, textArray + contextStart, start - contextStart, 483 end - start, contextEnd - contextStart, flags, glyphs); 484 env->ReleaseStringChars(text, textArray); 485 return count; 486 } 487 488 static jfloat doTextRunAdvances(JNIEnv *env, SkPaint *paint, const jchar *text, 489 jint start, jint count, jint contextCount, jint flags, 490 jfloatArray advances, jint advancesIndex) { 491 NPE_CHECK_RETURN_ZERO(env, paint); 492 NPE_CHECK_RETURN_ZERO(env, text); 493 494 if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) { 495 doThrowAIOOBE(env); 496 return 0; 497 } 498 if (count == 0) { 499 return 0; 500 } 501 if (advances) { 502 size_t advancesLength = env->GetArrayLength(advances); 503 if ((size_t)count > advancesLength) { 504 doThrowAIOOBE(env); 505 return 0; 506 } 507 } 508 jfloat advancesArray[count]; 509 jfloat totalAdvance = 0; 510 511 TextLayout::getTextRunAdvances(paint, text, start, count, contextCount, flags, 512 advancesArray, &totalAdvance); 513 514 if (advances != NULL) { 515 env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray); 516 } 517 return totalAdvance; 518 } 519 520 static jfloat doTextRunAdvancesICU(JNIEnv *env, SkPaint *paint, const jchar *text, 521 jint start, jint count, jint contextCount, jint flags, 522 jfloatArray advances, jint advancesIndex) { 523 NPE_CHECK_RETURN_ZERO(env, paint); 524 NPE_CHECK_RETURN_ZERO(env, text); 525 526 if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) { 527 doThrowAIOOBE(env); 528 return 0; 529 } 530 if (count == 0) { 531 return 0; 532 } 533 if (advances) { 534 size_t advancesLength = env->GetArrayLength(advances); 535 if ((size_t)count > advancesLength) { 536 doThrowAIOOBE(env); 537 return 0; 538 } 539 } 540 541 jfloat advancesArray[count]; 542 jfloat totalAdvance = 0; 543 544 TextLayout::getTextRunAdvancesICU(paint, text, start, count, contextCount, flags, 545 advancesArray, totalAdvance); 546 547 if (advances != NULL) { 548 env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray); 549 } 550 return totalAdvance; 551 } 552 553 static float getTextRunAdvances___CIIIII_FII(JNIEnv* env, jobject clazz, SkPaint* paint, 554 jcharArray text, jint index, jint count, jint contextIndex, jint contextCount, 555 jint flags, jfloatArray advances, jint advancesIndex, jint reserved) { 556 jchar* textArray = env->GetCharArrayElements(text, NULL); 557 jfloat result = (reserved == 0) ? 558 doTextRunAdvances(env, paint, textArray + contextIndex, index - contextIndex, 559 count, contextCount, flags, advances, advancesIndex) : 560 doTextRunAdvancesICU(env, paint, textArray + contextIndex, index - contextIndex, 561 count, contextCount, flags, advances, advancesIndex); 562 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 563 return result; 564 } 565 566 static float getTextRunAdvances__StringIIIII_FII(JNIEnv* env, jobject clazz, SkPaint* paint, 567 jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags, 568 jfloatArray advances, jint advancesIndex, jint reserved) { 569 const jchar* textArray = env->GetStringChars(text, NULL); 570 jfloat result = (reserved == 0) ? 571 doTextRunAdvances(env, paint, textArray + contextStart, start - contextStart, 572 end - start, contextEnd - contextStart, flags, advances, advancesIndex) : 573 doTextRunAdvancesICU(env, paint, textArray + contextStart, start - contextStart, 574 end - start, contextEnd - contextStart, flags, advances, advancesIndex); 575 env->ReleaseStringChars(text, textArray); 576 return result; 577 } 578 579 static jint doTextRunCursor(JNIEnv *env, SkPaint* paint, const jchar *text, jint start, 580 jint count, jint flags, jint offset, jint opt) { 581 jfloat scalarArray[count]; 582 583 TextLayout::getTextRunAdvances(paint, text, start, count, count, flags, 584 scalarArray, NULL /* dont need totalAdvance */); 585 586 jint pos = offset - start; 587 switch (opt) { 588 case AFTER: 589 if (pos < count) { 590 pos += 1; 591 } 592 // fall through 593 case AT_OR_AFTER: 594 while (pos < count && scalarArray[pos] == 0) { 595 ++pos; 596 } 597 break; 598 case BEFORE: 599 if (pos > 0) { 600 --pos; 601 } 602 // fall through 603 case AT_OR_BEFORE: 604 while (pos > 0 && scalarArray[pos] == 0) { 605 --pos; 606 } 607 break; 608 case AT: 609 default: 610 if (scalarArray[pos] == 0) { 611 pos = -1; 612 } 613 break; 614 } 615 616 if (pos != -1) { 617 pos += start; 618 } 619 620 return pos; 621 } 622 623 static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, SkPaint* paint, jcharArray text, 624 jint contextStart, jint contextCount, jint flags, jint offset, jint cursorOpt) { 625 jchar* textArray = env->GetCharArrayElements(text, NULL); 626 jint result = doTextRunCursor(env, paint, textArray, contextStart, contextCount, flags, 627 offset, cursorOpt); 628 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 629 return result; 630 } 631 632 static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, SkPaint* paint, jstring text, 633 jint contextStart, jint contextEnd, jint flags, jint offset, jint cursorOpt) { 634 const jchar* textArray = env->GetStringChars(text, NULL); 635 jint result = doTextRunCursor(env, paint, textArray, contextStart, 636 contextEnd - contextStart, flags, offset, cursorOpt); 637 env->ReleaseStringChars(text, textArray); 638 return result; 639 } 640 641 static void getTextPath(JNIEnv* env, SkPaint* paint, const jchar* text, jint count, 642 jint bidiFlags, jfloat x, jfloat y, SkPath *path) { 643 TextLayout::getTextPath(paint, text, count, bidiFlags, x, y, path); 644 } 645 646 static void getTextPath___C(JNIEnv* env, jobject clazz, SkPaint* paint, jint bidiFlags, 647 jcharArray text, int index, int count, jfloat x, jfloat y, SkPath* path) { 648 const jchar* textArray = env->GetCharArrayElements(text, NULL); 649 getTextPath(env, paint, textArray + index, count, bidiFlags, x, y, path); 650 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); 651 } 652 653 static void getTextPath__String(JNIEnv* env, jobject clazz, SkPaint* paint, jint bidiFlags, 654 jstring text, int start, int end, jfloat x, jfloat y, SkPath* path) { 655 const jchar* textArray = env->GetStringChars(text, NULL); 656 getTextPath(env, paint, textArray + start, end - start, bidiFlags, x, y, path); 657 env->ReleaseStringChars(text, textArray); 658 } 659 660 static void setShadowLayer(JNIEnv* env, jobject jpaint, jfloat radius, 661 jfloat dx, jfloat dy, int color) { 662 NPE_CHECK_RETURN_VOID(env, jpaint); 663 664 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 665 if (radius <= 0) { 666 paint->setLooper(NULL); 667 } 668 else { 669 paint->setLooper(new SkBlurDrawLooper(SkFloatToScalar(radius), 670 SkFloatToScalar(dx), 671 SkFloatToScalar(dy), 672 (SkColor)color))->unref(); 673 } 674 } 675 676 static int breakText(JNIEnv* env, const SkPaint& paint, const jchar text[], 677 int count, float maxWidth, jfloatArray jmeasured, 678 SkPaint::TextBufferDirection tbd) { 679 SkASSERT(paint.getTextEncoding() == SkPaint::kUTF16_TextEncoding); 680 681 SkScalar measured; 682 size_t bytes = paint.breakText(text, count << 1, 683 SkFloatToScalar(maxWidth), &measured, tbd); 684 SkASSERT((bytes & 1) == 0); 685 686 if (jmeasured && env->GetArrayLength(jmeasured) > 0) { 687 AutoJavaFloatArray autoMeasured(env, jmeasured, 1); 688 jfloat* array = autoMeasured.ptr(); 689 array[0] = SkScalarToFloat(measured); 690 } 691 return bytes >> 1; 692 } 693 694 static int breakTextC(JNIEnv* env, jobject jpaint, jcharArray jtext, 695 int index, int count, float maxWidth, jfloatArray jmeasuredWidth) { 696 NPE_CHECK_RETURN_ZERO(env, jpaint); 697 NPE_CHECK_RETURN_ZERO(env, jtext); 698 699 SkPaint::TextBufferDirection tbd; 700 if (count < 0) { 701 tbd = SkPaint::kBackward_TextBufferDirection; 702 count = -count; 703 } 704 else { 705 tbd = SkPaint::kForward_TextBufferDirection; 706 } 707 708 if ((index < 0) || (index + count > env->GetArrayLength(jtext))) { 709 doThrowAIOOBE(env); 710 return 0; 711 } 712 713 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 714 const jchar* text = env->GetCharArrayElements(jtext, NULL); 715 count = breakText(env, *paint, text + index, count, maxWidth, 716 jmeasuredWidth, tbd); 717 env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text), 718 JNI_ABORT); 719 return count; 720 } 721 722 static int breakTextS(JNIEnv* env, jobject jpaint, jstring jtext, 723 bool forwards, float maxWidth, jfloatArray jmeasuredWidth) { 724 NPE_CHECK_RETURN_ZERO(env, jpaint); 725 NPE_CHECK_RETURN_ZERO(env, jtext); 726 727 SkPaint::TextBufferDirection tbd = forwards ? 728 SkPaint::kForward_TextBufferDirection : 729 SkPaint::kBackward_TextBufferDirection; 730 731 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 732 int count = env->GetStringLength(jtext); 733 const jchar* text = env->GetStringChars(jtext, NULL); 734 count = breakText(env, *paint, text, count, maxWidth, 735 jmeasuredWidth, tbd); 736 env->ReleaseStringChars(jtext, text); 737 return count; 738 } 739 740 static void doTextBounds(JNIEnv* env, const jchar* text, int count, 741 jobject bounds, const SkPaint& paint) 742 { 743 SkRect r; 744 SkIRect ir; 745 746 paint.measureText(text, count << 1, &r); 747 r.roundOut(&ir); 748 GraphicsJNI::irect_to_jrect(ir, env, bounds); 749 } 750 751 static void getStringBounds(JNIEnv* env, jobject, const SkPaint* paint, 752 jstring text, int start, int end, jobject bounds) 753 { 754 const jchar* textArray = env->GetStringChars(text, NULL); 755 doTextBounds(env, textArray + start, end - start, bounds, *paint); 756 env->ReleaseStringChars(text, textArray); 757 } 758 759 static void getCharArrayBounds(JNIEnv* env, jobject, const SkPaint* paint, 760 jcharArray text, int index, int count, jobject bounds) 761 { 762 const jchar* textArray = env->GetCharArrayElements(text, NULL); 763 doTextBounds(env, textArray + index, count, bounds, *paint); 764 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 765 JNI_ABORT); 766 } 767 768}; 769 770static JNINativeMethod methods[] = { 771 {"finalizer", "(I)V", (void*) SkPaintGlue::finalizer}, 772 {"native_init","()I", (void*) SkPaintGlue::init}, 773 {"native_initWithPaint","(I)I", (void*) SkPaintGlue::intiWithPaint}, 774 {"native_reset","(I)V", (void*) SkPaintGlue::reset}, 775 {"native_set","(II)V", (void*) SkPaintGlue::assign}, 776 {"getFlags","()I", (void*) SkPaintGlue::getFlags}, 777 {"setFlags","(I)V", (void*) SkPaintGlue::setFlags}, 778 {"getHinting","()I", (void*) SkPaintGlue::getHinting}, 779 {"setHinting","(I)V", (void*) SkPaintGlue::setHinting}, 780 {"setAntiAlias","(Z)V", (void*) SkPaintGlue::setAntiAlias}, 781 {"setSubpixelText","(Z)V", (void*) SkPaintGlue::setSubpixelText}, 782 {"setLinearText","(Z)V", (void*) SkPaintGlue::setLinearText}, 783 {"setUnderlineText","(Z)V", (void*) SkPaintGlue::setUnderlineText}, 784 {"setStrikeThruText","(Z)V", (void*) SkPaintGlue::setStrikeThruText}, 785 {"setFakeBoldText","(Z)V", (void*) SkPaintGlue::setFakeBoldText}, 786 {"setFilterBitmap","(Z)V", (void*) SkPaintGlue::setFilterBitmap}, 787 {"setDither","(Z)V", (void*) SkPaintGlue::setDither}, 788 {"native_getStyle","(I)I", (void*) SkPaintGlue::getStyle}, 789 {"native_setStyle","(II)V", (void*) SkPaintGlue::setStyle}, 790 {"getColor","()I", (void*) SkPaintGlue::getColor}, 791 {"setColor","(I)V", (void*) SkPaintGlue::setColor}, 792 {"getAlpha","()I", (void*) SkPaintGlue::getAlpha}, 793 {"setAlpha","(I)V", (void*) SkPaintGlue::setAlpha}, 794 {"getStrokeWidth","()F", (void*) SkPaintGlue::getStrokeWidth}, 795 {"setStrokeWidth","(F)V", (void*) SkPaintGlue::setStrokeWidth}, 796 {"getStrokeMiter","()F", (void*) SkPaintGlue::getStrokeMiter}, 797 {"setStrokeMiter","(F)V", (void*) SkPaintGlue::setStrokeMiter}, 798 {"native_getStrokeCap","(I)I", (void*) SkPaintGlue::getStrokeCap}, 799 {"native_setStrokeCap","(II)V", (void*) SkPaintGlue::setStrokeCap}, 800 {"native_getStrokeJoin","(I)I", (void*) SkPaintGlue::getStrokeJoin}, 801 {"native_setStrokeJoin","(II)V", (void*) SkPaintGlue::setStrokeJoin}, 802 {"native_getFillPath","(III)Z", (void*) SkPaintGlue::getFillPath}, 803 {"native_setShader","(II)I", (void*) SkPaintGlue::setShader}, 804 {"native_setColorFilter","(II)I", (void*) SkPaintGlue::setColorFilter}, 805 {"native_setXfermode","(II)I", (void*) SkPaintGlue::setXfermode}, 806 {"native_setPathEffect","(II)I", (void*) SkPaintGlue::setPathEffect}, 807 {"native_setMaskFilter","(II)I", (void*) SkPaintGlue::setMaskFilter}, 808 {"native_setTypeface","(II)I", (void*) SkPaintGlue::setTypeface}, 809 {"native_setRasterizer","(II)I", (void*) SkPaintGlue::setRasterizer}, 810 {"native_getTextAlign","(I)I", (void*) SkPaintGlue::getTextAlign}, 811 {"native_setTextAlign","(II)V", (void*) SkPaintGlue::setTextAlign}, 812 {"getTextSize","()F", (void*) SkPaintGlue::getTextSize}, 813 {"setTextSize","(F)V", (void*) SkPaintGlue::setTextSize}, 814 {"getTextScaleX","()F", (void*) SkPaintGlue::getTextScaleX}, 815 {"setTextScaleX","(F)V", (void*) SkPaintGlue::setTextScaleX}, 816 {"getTextSkewX","()F", (void*) SkPaintGlue::getTextSkewX}, 817 {"setTextSkewX","(F)V", (void*) SkPaintGlue::setTextSkewX}, 818 {"ascent","()F", (void*) SkPaintGlue::ascent}, 819 {"descent","()F", (void*) SkPaintGlue::descent}, 820 {"getFontMetrics", "(Landroid/graphics/Paint$FontMetrics;)F", (void*)SkPaintGlue::getFontMetrics}, 821 {"getFontMetricsInt", "(Landroid/graphics/Paint$FontMetricsInt;)I", (void*)SkPaintGlue::getFontMetricsInt}, 822 {"native_measureText","([CII)F", (void*) SkPaintGlue::measureText_CII}, 823 {"native_measureText","(Ljava/lang/String;)F", (void*) SkPaintGlue::measureText_String}, 824 {"native_measureText","(Ljava/lang/String;II)F", (void*) SkPaintGlue::measureText_StringII}, 825 {"native_breakText","([CIIF[F)I", (void*) SkPaintGlue::breakTextC}, 826 {"native_breakText","(Ljava/lang/String;ZF[F)I", (void*) SkPaintGlue::breakTextS}, 827 {"native_getTextWidths","(I[CII[F)I", (void*) SkPaintGlue::getTextWidths___CII_F}, 828 {"native_getTextWidths","(ILjava/lang/String;II[F)I", (void*) SkPaintGlue::getTextWidths__StringII_F}, 829 {"native_getTextRunAdvances","(I[CIIIII[FII)F", 830 (void*) SkPaintGlue::getTextRunAdvances___CIIIII_FII}, 831 {"native_getTextRunAdvances","(ILjava/lang/String;IIIII[FII)F", 832 (void*) SkPaintGlue::getTextRunAdvances__StringIIIII_FII}, 833 834 835 {"native_getTextGlyphs","(ILjava/lang/String;IIIII[C)I", 836 (void*) SkPaintGlue::getTextGlyphs__StringIIIII_C}, 837 {"native_getTextRunCursor", "(I[CIIIII)I", (void*) SkPaintGlue::getTextRunCursor___C}, 838 {"native_getTextRunCursor", "(ILjava/lang/String;IIIII)I", 839 (void*) SkPaintGlue::getTextRunCursor__String}, 840 {"native_getTextPath","(II[CIIFFI)V", (void*) SkPaintGlue::getTextPath___C}, 841 {"native_getTextPath","(IILjava/lang/String;IIFFI)V", (void*) SkPaintGlue::getTextPath__String}, 842 {"nativeGetStringBounds", "(ILjava/lang/String;IILandroid/graphics/Rect;)V", 843 (void*) SkPaintGlue::getStringBounds }, 844 {"nativeGetCharArrayBounds", "(I[CIILandroid/graphics/Rect;)V", 845 (void*) SkPaintGlue::getCharArrayBounds }, 846 {"nSetShadowLayer", "(FFFI)V", (void*)SkPaintGlue::setShadowLayer} 847}; 848 849static jfieldID req_fieldID(jfieldID id) { 850 SkASSERT(id); 851 return id; 852} 853 854int register_android_graphics_Paint(JNIEnv* env) { 855 gFontMetrics_class = env->FindClass("android/graphics/Paint$FontMetrics"); 856 SkASSERT(gFontMetrics_class); 857 gFontMetrics_class = (jclass)env->NewGlobalRef(gFontMetrics_class); 858 859 gFontMetrics_fieldID.top = req_fieldID(env->GetFieldID(gFontMetrics_class, "top", "F")); 860 gFontMetrics_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetrics_class, "ascent", "F")); 861 gFontMetrics_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetrics_class, "descent", "F")); 862 gFontMetrics_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetrics_class, "bottom", "F")); 863 gFontMetrics_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetrics_class, "leading", "F")); 864 865 gFontMetricsInt_class = env->FindClass("android/graphics/Paint$FontMetricsInt"); 866 SkASSERT(gFontMetricsInt_class); 867 gFontMetricsInt_class = (jclass)env->NewGlobalRef(gFontMetricsInt_class); 868 869 gFontMetricsInt_fieldID.top = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "top", "I")); 870 gFontMetricsInt_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "ascent", "I")); 871 gFontMetricsInt_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "descent", "I")); 872 gFontMetricsInt_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "bottom", "I")); 873 gFontMetricsInt_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "leading", "I")); 874 875 int result = AndroidRuntime::registerNativeMethods(env, "android/graphics/Paint", methods, 876 sizeof(methods) / sizeof(methods[0])); 877 return result; 878} 879 880} 881