Paint.cpp revision f43fa5746ee5b81a6e386d36594094d079ac8160
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 // utf16 is required for java 58 paint->setTextEncoding(SkPaint::kUTF16_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#if RTL_USE_HARFBUZZ 354 TextLayout::getTextRunAdvances(paint, textArray, index, count, textLength, 355 paint->getFlags(), NULL /* dont need all advances */, result); 356#else 357 // we double count, since measureText wants a byteLength 358 SkScalar width = paint->measureText(textArray + index, count << 1); 359 result = SkScalarToFloat(width); 360#endif 361 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); 362 return result; 363 } 364 365 static jfloat measureText_StringII(JNIEnv* env, jobject jpaint, jstring text, int start, int end) { 366 NPE_CHECK_RETURN_ZERO(env, jpaint); 367 NPE_CHECK_RETURN_ZERO(env, text); 368 369 int count = end - start; 370 if ((start | count) < 0) { 371 doThrowAIOOBE(env); 372 return 0; 373 } 374 if (count == 0) { 375 return 0; 376 } 377 size_t textLength = env->GetStringLength(text); 378 if ((size_t)count > textLength) { 379 doThrowAIOOBE(env); 380 return 0; 381 } 382 383 const jchar* textArray = env->GetStringChars(text, NULL); 384 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 385 jfloat width = 0; 386 387#if RTL_USE_HARFBUZZ 388 TextLayout::getTextRunAdvances(paint, textArray, start, count, end, 389 paint->getFlags(), NULL /* dont need all advances */, width); 390#else 391 392 width = SkScalarToFloat(paint->measureText(textArray + start, count << 1)); 393#endif 394 env->ReleaseStringChars(text, textArray); 395 return width; 396 } 397 398 static jfloat measureText_String(JNIEnv* env, jobject jpaint, jstring text) { 399 NPE_CHECK_RETURN_ZERO(env, jpaint); 400 NPE_CHECK_RETURN_ZERO(env, text); 401 402 size_t textLength = env->GetStringLength(text); 403 if (textLength == 0) { 404 return 0; 405 } 406 407 const jchar* textArray = env->GetStringChars(text, NULL); 408 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 409 jfloat width = 0; 410 411#if RTL_USE_HARFBUZZ 412 TextLayout::getTextRunAdvances(paint, textArray, 0, textLength, textLength, 413 paint->getFlags(), NULL /* dont need all advances */, width); 414#else 415 width = SkScalarToFloat(paint->measureText(textArray, textLength << 1)); 416#endif 417 env->ReleaseStringChars(text, textArray); 418 return width; 419 } 420 421 static int dotextwidths(JNIEnv* env, SkPaint* paint, const jchar text[], int count, jfloatArray widths) { 422 NPE_CHECK_RETURN_ZERO(env, paint); 423 NPE_CHECK_RETURN_ZERO(env, text); 424 425 if (count < 0 || !widths) { 426 doThrowAIOOBE(env); 427 return 0; 428 } 429 if (count == 0) { 430 return 0; 431 } 432 size_t widthsLength = env->GetArrayLength(widths); 433 if ((size_t)count > widthsLength) { 434 doThrowAIOOBE(env); 435 return 0; 436 } 437 438 AutoJavaFloatArray autoWidths(env, widths, count); 439 jfloat* widthsArray = autoWidths.ptr(); 440 441#if RTL_USE_HARFBUZZ 442 jfloat totalAdvance; 443 444 TextLayout::getTextRunAdvances(paint, text, 0, count, count, 445 paint->getFlags(), widthsArray, totalAdvance); 446#else 447 SkScalar* scalarArray = (SkScalar*)widthsArray; 448 449 count = paint->getTextWidths(text, count << 1, scalarArray); 450 for (int i = 0; i < count; i++) { 451 widthsArray[i] = SkScalarToFloat(scalarArray[i]); 452 } 453#endif 454 return count; 455 } 456 457 static int getTextWidths___CII_F(JNIEnv* env, jobject clazz, SkPaint* paint, jcharArray text, int index, int count, jfloatArray widths) { 458 const jchar* textArray = env->GetCharArrayElements(text, NULL); 459 count = dotextwidths(env, paint, textArray + index, count, widths); 460 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 461 JNI_ABORT); 462 return count; 463 } 464 465 static int getTextWidths__StringII_F(JNIEnv* env, jobject clazz, SkPaint* paint, jstring text, 466 int start, int end, jfloatArray widths) { 467 const jchar* textArray = env->GetStringChars(text, NULL); 468 int count = dotextwidths(env, paint, textArray + start, end - start, widths); 469 env->ReleaseStringChars(text, textArray); 470 return count; 471 } 472 473 static int doTextGlyphs(JNIEnv* env, SkPaint* paint, const jchar* text, jint start, jint count, 474 jint contextCount, jint flags, jcharArray glyphs) { 475 NPE_CHECK_RETURN_ZERO(env, paint); 476 NPE_CHECK_RETURN_ZERO(env, text); 477 478 if ((start | count | contextCount) < 0 || contextCount < count || !glyphs) { 479 doThrowAIOOBE(env); 480 return 0; 481 } 482 if (count == 0) { 483 return 0; 484 } 485 size_t glypthsLength = env->GetArrayLength(glyphs); 486 if ((size_t)count > glypthsLength) { 487 doThrowAIOOBE(env); 488 return 0; 489 } 490 491 jchar* glyphsArray = env->GetCharArrayElements(glyphs, NULL); 492 HB_ShaperItem shaperItem; 493 HB_FontRec font; 494 FontData fontData; 495 TextLayoutCacheValue::shapeWithHarfbuzz(&shaperItem, &font, &fontData, paint, text, 496 start, count, contextCount, flags); 497 498 int glyphCount = shaperItem.num_glyphs; 499 for (int i = 0; i < glyphCount; i++) { 500 glyphsArray[i] = (jchar) shaperItem.glyphs[i]; 501 } 502 env->ReleaseCharArrayElements(glyphs, glyphsArray, JNI_ABORT); 503 return glyphCount; 504 } 505 506 static int getTextGlyphs__StringIIIII_C(JNIEnv* env, jobject clazz, SkPaint* paint, 507 jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags, 508 jcharArray glyphs) { 509 const jchar* textArray = env->GetStringChars(text, NULL); 510 int count = doTextGlyphs(env, paint, textArray + contextStart, start - contextStart, 511 end - start, contextEnd - contextStart, flags, glyphs); 512 env->ReleaseStringChars(text, textArray); 513 return count; 514 } 515 516 static jfloat doTextRunAdvances(JNIEnv *env, SkPaint *paint, const jchar *text, 517 jint start, jint count, jint contextCount, jint flags, 518 jfloatArray advances, jint advancesIndex) { 519 NPE_CHECK_RETURN_ZERO(env, paint); 520 NPE_CHECK_RETURN_ZERO(env, text); 521 522 if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) { 523 doThrowAIOOBE(env); 524 return 0; 525 } 526 if (count == 0) { 527 return 0; 528 } 529 if (advances) { 530 size_t advancesLength = env->GetArrayLength(advances); 531 if ((size_t)count > advancesLength) { 532 doThrowAIOOBE(env); 533 return 0; 534 } 535 } 536 jfloat advancesArray[count]; 537 jfloat totalAdvance = 0; 538 539 TextLayout::getTextRunAdvances(paint, text, start, count, contextCount, flags, 540 advancesArray, totalAdvance); 541 542 if (advances != NULL) { 543 env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray); 544 } 545 return totalAdvance; 546 } 547 548 static jfloat doTextRunAdvancesICU(JNIEnv *env, SkPaint *paint, const jchar *text, 549 jint start, jint count, jint contextCount, jint flags, 550 jfloatArray advances, jint advancesIndex) { 551 NPE_CHECK_RETURN_ZERO(env, paint); 552 NPE_CHECK_RETURN_ZERO(env, text); 553 554 if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) { 555 doThrowAIOOBE(env); 556 return 0; 557 } 558 if (count == 0) { 559 return 0; 560 } 561 if (advances) { 562 size_t advancesLength = env->GetArrayLength(advances); 563 if ((size_t)count > advancesLength) { 564 doThrowAIOOBE(env); 565 return 0; 566 } 567 } 568 569 jfloat advancesArray[count]; 570 jfloat totalAdvance = 0; 571 572 TextLayout::getTextRunAdvancesICU(paint, text, start, count, contextCount, flags, 573 advancesArray, totalAdvance); 574 575 if (advances != NULL) { 576 env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray); 577 } 578 return totalAdvance; 579 } 580 581 static float getTextRunAdvances___CIIIII_FII(JNIEnv* env, jobject clazz, SkPaint* paint, 582 jcharArray text, jint index, jint count, jint contextIndex, jint contextCount, 583 jint flags, jfloatArray advances, jint advancesIndex, jint reserved) { 584 jchar* textArray = env->GetCharArrayElements(text, NULL); 585 jfloat result = (reserved == 0) ? 586 doTextRunAdvances(env, paint, textArray + contextIndex, index - contextIndex, 587 count, contextCount, flags, advances, advancesIndex) : 588 doTextRunAdvancesICU(env, paint, textArray + contextIndex, index - contextIndex, 589 count, contextCount, flags, advances, advancesIndex); 590 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 591 return result; 592 } 593 594 static float getTextRunAdvances__StringIIIII_FII(JNIEnv* env, jobject clazz, SkPaint* paint, 595 jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags, 596 jfloatArray advances, jint advancesIndex, jint reserved) { 597 const jchar* textArray = env->GetStringChars(text, NULL); 598 jfloat result = (reserved == 0) ? 599 doTextRunAdvances(env, paint, textArray + contextStart, start - contextStart, 600 end - start, contextEnd - contextStart, flags, advances, advancesIndex) : 601 doTextRunAdvancesICU(env, paint, textArray + contextStart, start - contextStart, 602 end - start, contextEnd - contextStart, flags, advances, advancesIndex); 603 env->ReleaseStringChars(text, textArray); 604 return result; 605 } 606 607 static jint doTextRunCursor(JNIEnv *env, SkPaint* paint, const jchar *text, jint start, 608 jint count, jint flags, jint offset, jint opt) { 609#if RTL_USE_HARFBUZZ 610 jfloat scalarArray[count]; 611 jfloat totalAdvance = 0; 612 613 TextLayout::getTextRunAdvances(paint, text, start, count, count, flags, 614 scalarArray, totalAdvance); 615#else 616 SkScalar scalarArray[count]; 617 jchar buffer[count]; 618 619 // this is where we'd call harfbuzz 620 // for now we just use ushape.c and widths returned from skia 621 622 int widths; 623 if (flags & 0x1) { // rtl, call arabic shaping in case 624 UErrorCode status = U_ZERO_ERROR; 625 // Use fixed length since we need to keep start and count valid 626 u_shapeArabic(text + start, count, buffer, count, 627 U_SHAPE_LENGTH_FIXED_SPACES_NEAR | U_SHAPE_TEXT_DIRECTION_LOGICAL | 628 U_SHAPE_LETTERS_SHAPE | U_SHAPE_X_LAMALEF_SUB_ALTERNATE, &status); 629 // we shouldn't fail unless there's an out of memory condition, 630 // in which case we're hosed anyway 631 for (int i = 0; i < count; ++i) { 632 if (buffer[i] == 0xffff) { 633 buffer[i] = 0x200b; // zero-width-space for skia 634 } 635 } 636 widths = paint->getTextWidths(buffer, count << 1, scalarArray); 637 } else { 638 widths = paint->getTextWidths(text + start, count << 1, scalarArray); 639 } 640 641 if (widths < count) { 642 // Skia operates on code points, not code units, so surrogate pairs return only one 643 // value. Expand the result so we have one value per UTF-16 code unit. 644 645 // Note, skia's getTextWidth gets confused if it encounters a surrogate pair, 646 // leaving the remaining widths zero. Not nice. 647 const jchar *chars = text + start; 648 for (int i = count, p = widths - 1; --i > p;) { 649 if (chars[i] >= 0xdc00 && chars[i] < 0xe000 && 650 chars[i-1] >= 0xd800 && chars[i-1] < 0xdc00) { 651 scalarArray[i] = 0; 652 } else { 653 scalarArray[i] = scalarArray[--p]; 654 } 655 } 656 } 657#endif 658 jint pos = offset - start; 659 switch (opt) { 660 case AFTER: 661 if (pos < count) { 662 pos += 1; 663 } 664 // fall through 665 case AT_OR_AFTER: 666 while (pos < count && scalarArray[pos] == 0) { 667 ++pos; 668 } 669 break; 670 case BEFORE: 671 if (pos > 0) { 672 --pos; 673 } 674 // fall through 675 case AT_OR_BEFORE: 676 while (pos > 0 && scalarArray[pos] == 0) { 677 --pos; 678 } 679 break; 680 case AT: 681 default: 682 if (scalarArray[pos] == 0) { 683 pos = -1; 684 } 685 break; 686 } 687 688 if (pos != -1) { 689 pos += start; 690 } 691 692 return pos; 693 } 694 695 static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, SkPaint* paint, jcharArray text, 696 jint contextStart, jint contextCount, jint flags, jint offset, jint cursorOpt) { 697 jchar* textArray = env->GetCharArrayElements(text, NULL); 698 jint result = doTextRunCursor(env, paint, textArray, contextStart, contextCount, flags, 699 offset, cursorOpt); 700 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 701 return result; 702 } 703 704 static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, SkPaint* paint, jstring text, 705 jint contextStart, jint contextEnd, jint flags, jint offset, jint cursorOpt) { 706 const jchar* textArray = env->GetStringChars(text, NULL); 707 jint result = doTextRunCursor(env, paint, textArray, contextStart, 708 contextEnd - contextStart, flags, offset, cursorOpt); 709 env->ReleaseStringChars(text, textArray); 710 return result; 711 } 712 713 static void getTextPath(JNIEnv* env, SkPaint* paint, const jchar* text, jint count, 714 jint bidiFlags, jfloat x, jfloat y, SkPath *path) { 715 TextLayout::getTextPath(paint, text, count, bidiFlags, x, y, path); 716 } 717 718 static void getTextPath___C(JNIEnv* env, jobject clazz, SkPaint* paint, jint bidiFlags, 719 jcharArray text, int index, int count, jfloat x, jfloat y, SkPath* path) { 720 const jchar* textArray = env->GetCharArrayElements(text, NULL); 721 getTextPath(env, paint, textArray + index, count, bidiFlags, x, y, path); 722 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); 723 } 724 725 static void getTextPath__String(JNIEnv* env, jobject clazz, SkPaint* paint, jint bidiFlags, 726 jstring text, int start, int end, jfloat x, jfloat y, SkPath* path) { 727 const jchar* textArray = env->GetStringChars(text, NULL); 728 getTextPath(env, paint, textArray + start, end - start, bidiFlags, x, y, path); 729 env->ReleaseStringChars(text, textArray); 730 } 731 732 static void setShadowLayer(JNIEnv* env, jobject jpaint, jfloat radius, 733 jfloat dx, jfloat dy, int color) { 734 NPE_CHECK_RETURN_VOID(env, jpaint); 735 736 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 737 if (radius <= 0) { 738 paint->setLooper(NULL); 739 } 740 else { 741 paint->setLooper(new SkBlurDrawLooper(SkFloatToScalar(radius), 742 SkFloatToScalar(dx), 743 SkFloatToScalar(dy), 744 (SkColor)color))->unref(); 745 } 746 } 747 748 static int breakText(JNIEnv* env, const SkPaint& paint, const jchar text[], 749 int count, float maxWidth, jfloatArray jmeasured, 750 SkPaint::TextBufferDirection tbd) { 751 SkASSERT(paint.getTextEncoding() == SkPaint::kUTF16_TextEncoding); 752 753 SkScalar measured; 754 size_t bytes = paint.breakText(text, count << 1, 755 SkFloatToScalar(maxWidth), &measured, tbd); 756 SkASSERT((bytes & 1) == 0); 757 758 if (jmeasured && env->GetArrayLength(jmeasured) > 0) { 759 AutoJavaFloatArray autoMeasured(env, jmeasured, 1); 760 jfloat* array = autoMeasured.ptr(); 761 array[0] = SkScalarToFloat(measured); 762 } 763 return bytes >> 1; 764 } 765 766 static int breakTextC(JNIEnv* env, jobject jpaint, jcharArray jtext, 767 int index, int count, float maxWidth, jfloatArray jmeasuredWidth) { 768 NPE_CHECK_RETURN_ZERO(env, jpaint); 769 NPE_CHECK_RETURN_ZERO(env, jtext); 770 771 SkPaint::TextBufferDirection tbd; 772 if (count < 0) { 773 tbd = SkPaint::kBackward_TextBufferDirection; 774 count = -count; 775 } 776 else { 777 tbd = SkPaint::kForward_TextBufferDirection; 778 } 779 780 if ((index < 0) || (index + count > env->GetArrayLength(jtext))) { 781 doThrowAIOOBE(env); 782 return 0; 783 } 784 785 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 786 const jchar* text = env->GetCharArrayElements(jtext, NULL); 787 count = breakText(env, *paint, text + index, count, maxWidth, 788 jmeasuredWidth, tbd); 789 env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text), 790 JNI_ABORT); 791 return count; 792 } 793 794 static int breakTextS(JNIEnv* env, jobject jpaint, jstring jtext, 795 bool forwards, float maxWidth, jfloatArray jmeasuredWidth) { 796 NPE_CHECK_RETURN_ZERO(env, jpaint); 797 NPE_CHECK_RETURN_ZERO(env, jtext); 798 799 SkPaint::TextBufferDirection tbd = forwards ? 800 SkPaint::kForward_TextBufferDirection : 801 SkPaint::kBackward_TextBufferDirection; 802 803 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 804 int count = env->GetStringLength(jtext); 805 const jchar* text = env->GetStringChars(jtext, NULL); 806 count = breakText(env, *paint, text, count, maxWidth, 807 jmeasuredWidth, tbd); 808 env->ReleaseStringChars(jtext, text); 809 return count; 810 } 811 812 static void doTextBounds(JNIEnv* env, const jchar* text, int count, 813 jobject bounds, const SkPaint& paint) 814 { 815 SkRect r; 816 SkIRect ir; 817 818 paint.measureText(text, count << 1, &r); 819 r.roundOut(&ir); 820 GraphicsJNI::irect_to_jrect(ir, env, bounds); 821 } 822 823 static void getStringBounds(JNIEnv* env, jobject, const SkPaint* paint, 824 jstring text, int start, int end, jobject bounds) 825 { 826 const jchar* textArray = env->GetStringChars(text, NULL); 827 doTextBounds(env, textArray + start, end - start, bounds, *paint); 828 env->ReleaseStringChars(text, textArray); 829 } 830 831 static void getCharArrayBounds(JNIEnv* env, jobject, const SkPaint* paint, 832 jcharArray text, int index, int count, jobject bounds) 833 { 834 const jchar* textArray = env->GetCharArrayElements(text, NULL); 835 doTextBounds(env, textArray + index, count, bounds, *paint); 836 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 837 JNI_ABORT); 838 } 839 840}; 841 842static JNINativeMethod methods[] = { 843 {"finalizer", "(I)V", (void*) SkPaintGlue::finalizer}, 844 {"native_init","()I", (void*) SkPaintGlue::init}, 845 {"native_initWithPaint","(I)I", (void*) SkPaintGlue::intiWithPaint}, 846 {"native_reset","(I)V", (void*) SkPaintGlue::reset}, 847 {"native_set","(II)V", (void*) SkPaintGlue::assign}, 848 {"getFlags","()I", (void*) SkPaintGlue::getFlags}, 849 {"setFlags","(I)V", (void*) SkPaintGlue::setFlags}, 850 {"getHinting","()I", (void*) SkPaintGlue::getHinting}, 851 {"setHinting","(I)V", (void*) SkPaintGlue::setHinting}, 852 {"setAntiAlias","(Z)V", (void*) SkPaintGlue::setAntiAlias}, 853 {"setSubpixelText","(Z)V", (void*) SkPaintGlue::setSubpixelText}, 854 {"setLinearText","(Z)V", (void*) SkPaintGlue::setLinearText}, 855 {"setUnderlineText","(Z)V", (void*) SkPaintGlue::setUnderlineText}, 856 {"setStrikeThruText","(Z)V", (void*) SkPaintGlue::setStrikeThruText}, 857 {"setFakeBoldText","(Z)V", (void*) SkPaintGlue::setFakeBoldText}, 858 {"setFilterBitmap","(Z)V", (void*) SkPaintGlue::setFilterBitmap}, 859 {"setDither","(Z)V", (void*) SkPaintGlue::setDither}, 860 {"native_getStyle","(I)I", (void*) SkPaintGlue::getStyle}, 861 {"native_setStyle","(II)V", (void*) SkPaintGlue::setStyle}, 862 {"getColor","()I", (void*) SkPaintGlue::getColor}, 863 {"setColor","(I)V", (void*) SkPaintGlue::setColor}, 864 {"getAlpha","()I", (void*) SkPaintGlue::getAlpha}, 865 {"setAlpha","(I)V", (void*) SkPaintGlue::setAlpha}, 866 {"getStrokeWidth","()F", (void*) SkPaintGlue::getStrokeWidth}, 867 {"setStrokeWidth","(F)V", (void*) SkPaintGlue::setStrokeWidth}, 868 {"getStrokeMiter","()F", (void*) SkPaintGlue::getStrokeMiter}, 869 {"setStrokeMiter","(F)V", (void*) SkPaintGlue::setStrokeMiter}, 870 {"native_getStrokeCap","(I)I", (void*) SkPaintGlue::getStrokeCap}, 871 {"native_setStrokeCap","(II)V", (void*) SkPaintGlue::setStrokeCap}, 872 {"native_getStrokeJoin","(I)I", (void*) SkPaintGlue::getStrokeJoin}, 873 {"native_setStrokeJoin","(II)V", (void*) SkPaintGlue::setStrokeJoin}, 874 {"native_getFillPath","(III)Z", (void*) SkPaintGlue::getFillPath}, 875 {"native_setShader","(II)I", (void*) SkPaintGlue::setShader}, 876 {"native_setColorFilter","(II)I", (void*) SkPaintGlue::setColorFilter}, 877 {"native_setXfermode","(II)I", (void*) SkPaintGlue::setXfermode}, 878 {"native_setPathEffect","(II)I", (void*) SkPaintGlue::setPathEffect}, 879 {"native_setMaskFilter","(II)I", (void*) SkPaintGlue::setMaskFilter}, 880 {"native_setTypeface","(II)I", (void*) SkPaintGlue::setTypeface}, 881 {"native_setRasterizer","(II)I", (void*) SkPaintGlue::setRasterizer}, 882 {"native_getTextAlign","(I)I", (void*) SkPaintGlue::getTextAlign}, 883 {"native_setTextAlign","(II)V", (void*) SkPaintGlue::setTextAlign}, 884 {"getTextSize","()F", (void*) SkPaintGlue::getTextSize}, 885 {"setTextSize","(F)V", (void*) SkPaintGlue::setTextSize}, 886 {"getTextScaleX","()F", (void*) SkPaintGlue::getTextScaleX}, 887 {"setTextScaleX","(F)V", (void*) SkPaintGlue::setTextScaleX}, 888 {"getTextSkewX","()F", (void*) SkPaintGlue::getTextSkewX}, 889 {"setTextSkewX","(F)V", (void*) SkPaintGlue::setTextSkewX}, 890 {"ascent","()F", (void*) SkPaintGlue::ascent}, 891 {"descent","()F", (void*) SkPaintGlue::descent}, 892 {"getFontMetrics", "(Landroid/graphics/Paint$FontMetrics;)F", (void*)SkPaintGlue::getFontMetrics}, 893 {"getFontMetricsInt", "(Landroid/graphics/Paint$FontMetricsInt;)I", (void*)SkPaintGlue::getFontMetricsInt}, 894 {"native_measureText","([CII)F", (void*) SkPaintGlue::measureText_CII}, 895 {"native_measureText","(Ljava/lang/String;)F", (void*) SkPaintGlue::measureText_String}, 896 {"native_measureText","(Ljava/lang/String;II)F", (void*) SkPaintGlue::measureText_StringII}, 897 {"native_breakText","([CIIF[F)I", (void*) SkPaintGlue::breakTextC}, 898 {"native_breakText","(Ljava/lang/String;ZF[F)I", (void*) SkPaintGlue::breakTextS}, 899 {"native_getTextWidths","(I[CII[F)I", (void*) SkPaintGlue::getTextWidths___CII_F}, 900 {"native_getTextWidths","(ILjava/lang/String;II[F)I", (void*) SkPaintGlue::getTextWidths__StringII_F}, 901 {"native_getTextRunAdvances","(I[CIIIII[FII)F", 902 (void*) SkPaintGlue::getTextRunAdvances___CIIIII_FII}, 903 {"native_getTextRunAdvances","(ILjava/lang/String;IIIII[FII)F", 904 (void*) SkPaintGlue::getTextRunAdvances__StringIIIII_FII}, 905 906 907 {"native_getTextGlyphs","(ILjava/lang/String;IIIII[C)I", 908 (void*) SkPaintGlue::getTextGlyphs__StringIIIII_C}, 909 {"native_getTextRunCursor", "(I[CIIIII)I", (void*) SkPaintGlue::getTextRunCursor___C}, 910 {"native_getTextRunCursor", "(ILjava/lang/String;IIIII)I", 911 (void*) SkPaintGlue::getTextRunCursor__String}, 912 {"native_getTextPath","(II[CIIFFI)V", (void*) SkPaintGlue::getTextPath___C}, 913 {"native_getTextPath","(IILjava/lang/String;IIFFI)V", (void*) SkPaintGlue::getTextPath__String}, 914 {"nativeGetStringBounds", "(ILjava/lang/String;IILandroid/graphics/Rect;)V", 915 (void*) SkPaintGlue::getStringBounds }, 916 {"nativeGetCharArrayBounds", "(I[CIILandroid/graphics/Rect;)V", 917 (void*) SkPaintGlue::getCharArrayBounds }, 918 {"nSetShadowLayer", "(FFFI)V", (void*)SkPaintGlue::setShadowLayer} 919}; 920 921static jfieldID req_fieldID(jfieldID id) { 922 SkASSERT(id); 923 return id; 924} 925 926int register_android_graphics_Paint(JNIEnv* env) { 927 gFontMetrics_class = env->FindClass("android/graphics/Paint$FontMetrics"); 928 SkASSERT(gFontMetrics_class); 929 gFontMetrics_class = (jclass)env->NewGlobalRef(gFontMetrics_class); 930 931 gFontMetrics_fieldID.top = req_fieldID(env->GetFieldID(gFontMetrics_class, "top", "F")); 932 gFontMetrics_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetrics_class, "ascent", "F")); 933 gFontMetrics_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetrics_class, "descent", "F")); 934 gFontMetrics_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetrics_class, "bottom", "F")); 935 gFontMetrics_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetrics_class, "leading", "F")); 936 937 gFontMetricsInt_class = env->FindClass("android/graphics/Paint$FontMetricsInt"); 938 SkASSERT(gFontMetricsInt_class); 939 gFontMetricsInt_class = (jclass)env->NewGlobalRef(gFontMetricsInt_class); 940 941 gFontMetricsInt_fieldID.top = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "top", "I")); 942 gFontMetricsInt_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "ascent", "I")); 943 gFontMetricsInt_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "descent", "I")); 944 gFontMetricsInt_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "bottom", "I")); 945 gFontMetricsInt_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "leading", "I")); 946 947 int result = AndroidRuntime::registerNativeMethods(env, "android/graphics/Paint", methods, 948 sizeof(methods) / sizeof(methods[0])); 949 return result; 950} 951 952} 953