Paint.cpp revision 27f0b17d853d8bef918c3d869044e50cf3904ee3
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#include "jni.h" 19#include "GraphicsJNI.h" 20#include <android_runtime/AndroidRuntime.h> 21 22#include "SkBlurDrawLooper.h" 23#include "SkColorFilter.h" 24#include "SkMaskFilter.h" 25#include "SkRasterizer.h" 26#include "SkShader.h" 27#include "SkTypeface.h" 28#include "SkXfermode.h" 29#include "unicode/ushape.h" 30#include "TextLayout.h" 31 32// temporary for debugging 33#include <Caches.h> 34#include <utils/Log.h> 35 36namespace android { 37 38struct JMetricsID { 39 jfieldID top; 40 jfieldID ascent; 41 jfieldID descent; 42 jfieldID bottom; 43 jfieldID leading; 44}; 45 46static jclass gFontMetrics_class; 47static JMetricsID gFontMetrics_fieldID; 48 49static jclass gFontMetricsInt_class; 50static JMetricsID gFontMetricsInt_fieldID; 51 52static void defaultSettingsForAndroid(SkPaint* paint) { 53 // looks best we decided 54 paint->setHinting(SkPaint::kSlight_Hinting); 55 // utf16 is required for java 56 paint->setTextEncoding(SkPaint::kUTF16_TextEncoding); 57} 58 59class SkPaintGlue { 60public: 61 enum MoveOpt { 62 AFTER, AT_OR_AFTER, BEFORE, AT_OR_BEFORE, AT 63 }; 64 65 static void finalizer(JNIEnv* env, jobject clazz, SkPaint* obj) { 66#ifdef USE_OPENGL_RENDERER 67 if (android::uirenderer::Caches::hasInstance()) { 68 android::uirenderer::Caches::getInstance().resourceCache.destructor(obj); 69 return; 70 } 71#endif // USE_OPENGL_RENDERER 72 delete obj; 73 } 74 75 static SkPaint* init(JNIEnv* env, jobject clazz) { 76 SkPaint* obj = new SkPaint(); 77 defaultSettingsForAndroid(obj); 78 return obj; 79 } 80 81 static SkPaint* intiWithPaint(JNIEnv* env, jobject clazz, SkPaint* paint) { 82 SkPaint* obj = new SkPaint(*paint); 83 return obj; 84 } 85 86 static void reset(JNIEnv* env, jobject clazz, SkPaint* obj) { 87 obj->reset(); 88 defaultSettingsForAndroid(obj); 89 } 90 91 static void assign(JNIEnv* env, jobject clazz, SkPaint* dst, const SkPaint* src) { 92 *dst = *src; 93 } 94 95 static jint getFlags(JNIEnv* env, jobject paint) { 96 NPE_CHECK_RETURN_ZERO(env, paint); 97 return GraphicsJNI::getNativePaint(env, paint)->getFlags(); 98 } 99 100 static void setFlags(JNIEnv* env, jobject paint, jint flags) { 101 NPE_CHECK_RETURN_VOID(env, paint); 102 GraphicsJNI::getNativePaint(env, paint)->setFlags(flags); 103 } 104 105 static void setAntiAlias(JNIEnv* env, jobject paint, jboolean aa) { 106 NPE_CHECK_RETURN_VOID(env, paint); 107 GraphicsJNI::getNativePaint(env, paint)->setAntiAlias(aa); 108 } 109 110 static void setLinearText(JNIEnv* env, jobject paint, jboolean linearText) { 111 NPE_CHECK_RETURN_VOID(env, paint); 112 GraphicsJNI::getNativePaint(env, paint)->setLinearText(linearText); 113 } 114 115 static void setSubpixelText(JNIEnv* env, jobject paint, jboolean subpixelText) { 116 NPE_CHECK_RETURN_VOID(env, paint); 117 GraphicsJNI::getNativePaint(env, paint)->setSubpixelText(subpixelText); 118 } 119 120 static void setUnderlineText(JNIEnv* env, jobject paint, jboolean underlineText) { 121 NPE_CHECK_RETURN_VOID(env, paint); 122 GraphicsJNI::getNativePaint(env, paint)->setUnderlineText(underlineText); 123 } 124 125 static void setStrikeThruText(JNIEnv* env, jobject paint, jboolean strikeThruText) { 126 NPE_CHECK_RETURN_VOID(env, paint); 127 GraphicsJNI::getNativePaint(env, paint)->setStrikeThruText(strikeThruText); 128 } 129 130 static void setFakeBoldText(JNIEnv* env, jobject paint, jboolean fakeBoldText) { 131 NPE_CHECK_RETURN_VOID(env, paint); 132 GraphicsJNI::getNativePaint(env, paint)->setFakeBoldText(fakeBoldText); 133 } 134 135 static void setFilterBitmap(JNIEnv* env, jobject paint, jboolean filterBitmap) { 136 NPE_CHECK_RETURN_VOID(env, paint); 137 GraphicsJNI::getNativePaint(env, paint)->setFilterBitmap(filterBitmap); 138 } 139 140 static void setDither(JNIEnv* env, jobject paint, jboolean dither) { 141 NPE_CHECK_RETURN_VOID(env, paint); 142 GraphicsJNI::getNativePaint(env, paint)->setDither(dither); 143 } 144 145 static jint getStyle(JNIEnv* env, jobject clazz, SkPaint* obj) { 146 return obj->getStyle(); 147 } 148 149 static void setStyle(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Style style) { 150 obj->setStyle(style); 151 } 152 153 static jint getColor(JNIEnv* env, jobject paint) { 154 NPE_CHECK_RETURN_ZERO(env, paint); 155 return GraphicsJNI::getNativePaint(env, paint)->getColor(); 156 } 157 158 static jint getAlpha(JNIEnv* env, jobject paint) { 159 NPE_CHECK_RETURN_ZERO(env, paint); 160 return GraphicsJNI::getNativePaint(env, paint)->getAlpha(); 161 } 162 163 static void setColor(JNIEnv* env, jobject paint, jint color) { 164 NPE_CHECK_RETURN_VOID(env, paint); 165 GraphicsJNI::getNativePaint(env, paint)->setColor(color); 166 } 167 168 static void setAlpha(JNIEnv* env, jobject paint, jint a) { 169 NPE_CHECK_RETURN_VOID(env, paint); 170 GraphicsJNI::getNativePaint(env, paint)->setAlpha(a); 171 } 172 173 static jfloat getStrokeWidth(JNIEnv* env, jobject paint) { 174 NPE_CHECK_RETURN_ZERO(env, paint); 175 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeWidth()); 176 } 177 178 static void setStrokeWidth(JNIEnv* env, jobject paint, jfloat width) { 179 NPE_CHECK_RETURN_VOID(env, paint); 180 GraphicsJNI::getNativePaint(env, paint)->setStrokeWidth(SkFloatToScalar(width)); 181 } 182 183 static jfloat getStrokeMiter(JNIEnv* env, jobject paint) { 184 NPE_CHECK_RETURN_ZERO(env, paint); 185 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeMiter()); 186 } 187 188 static void setStrokeMiter(JNIEnv* env, jobject paint, jfloat miter) { 189 NPE_CHECK_RETURN_VOID(env, paint); 190 GraphicsJNI::getNativePaint(env, paint)->setStrokeMiter(SkFloatToScalar(miter)); 191 } 192 193 static jint getStrokeCap(JNIEnv* env, jobject clazz, SkPaint* obj) { 194 return obj->getStrokeCap(); 195 } 196 197 static void setStrokeCap(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Cap cap) { 198 obj->setStrokeCap(cap); 199 } 200 201 static jint getStrokeJoin(JNIEnv* env, jobject clazz, SkPaint* obj) { 202 return obj->getStrokeJoin(); 203 } 204 205 static void setStrokeJoin(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Join join) { 206 obj->setStrokeJoin(join); 207 } 208 209 static jboolean getFillPath(JNIEnv* env, jobject clazz, SkPaint* obj, SkPath* src, SkPath* dst) { 210 return obj->getFillPath(*src, dst); 211 } 212 213 static SkShader* setShader(JNIEnv* env, jobject clazz, SkPaint* obj, SkShader* shader) { 214 return obj->setShader(shader); 215 } 216 217 static SkColorFilter* setColorFilter(JNIEnv* env, jobject clazz, SkPaint* obj, SkColorFilter* filter) { 218 return obj->setColorFilter(filter); 219 } 220 221 static SkXfermode* setXfermode(JNIEnv* env, jobject clazz, SkPaint* obj, SkXfermode* xfermode) { 222 return obj->setXfermode(xfermode); 223 } 224 225 static SkPathEffect* setPathEffect(JNIEnv* env, jobject clazz, SkPaint* obj, SkPathEffect* effect) { 226 return obj->setPathEffect(effect); 227 } 228 229 static SkMaskFilter* setMaskFilter(JNIEnv* env, jobject clazz, SkPaint* obj, SkMaskFilter* maskfilter) { 230 return obj->setMaskFilter(maskfilter); 231 } 232 233 static SkTypeface* setTypeface(JNIEnv* env, jobject clazz, SkPaint* obj, SkTypeface* typeface) { 234 return obj->setTypeface(typeface); 235 } 236 237 static SkRasterizer* setRasterizer(JNIEnv* env, jobject clazz, SkPaint* obj, SkRasterizer* rasterizer) { 238 return obj->setRasterizer(rasterizer); 239 } 240 241 static jint getTextAlign(JNIEnv* env, jobject clazz, SkPaint* obj) { 242 return obj->getTextAlign(); 243 } 244 245 static void setTextAlign(JNIEnv* env, jobject clazz, SkPaint* obj, SkPaint::Align align) { 246 obj->setTextAlign(align); 247 } 248 249 static jfloat getTextSize(JNIEnv* env, jobject paint) { 250 NPE_CHECK_RETURN_ZERO(env, paint); 251 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSize()); 252 } 253 254 static void setTextSize(JNIEnv* env, jobject paint, jfloat textSize) { 255 NPE_CHECK_RETURN_VOID(env, paint); 256 GraphicsJNI::getNativePaint(env, paint)->setTextSize(SkFloatToScalar(textSize)); 257 } 258 259 static jfloat getTextScaleX(JNIEnv* env, jobject paint) { 260 NPE_CHECK_RETURN_ZERO(env, paint); 261 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextScaleX()); 262 } 263 264 static void setTextScaleX(JNIEnv* env, jobject paint, jfloat scaleX) { 265 NPE_CHECK_RETURN_VOID(env, paint); 266 GraphicsJNI::getNativePaint(env, paint)->setTextScaleX(SkFloatToScalar(scaleX)); 267 } 268 269 static jfloat getTextSkewX(JNIEnv* env, jobject paint) { 270 NPE_CHECK_RETURN_ZERO(env, paint); 271 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSkewX()); 272 } 273 274 static void setTextSkewX(JNIEnv* env, jobject paint, jfloat skewX) { 275 NPE_CHECK_RETURN_VOID(env, paint); 276 GraphicsJNI::getNativePaint(env, paint)->setTextSkewX(SkFloatToScalar(skewX)); 277 } 278 279 static jfloat ascent(JNIEnv* env, jobject paint) { 280 NPE_CHECK_RETURN_ZERO(env, paint); 281 SkPaint::FontMetrics metrics; 282 (void)GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 283 return SkScalarToFloat(metrics.fAscent); 284 } 285 286 static jfloat descent(JNIEnv* env, jobject paint) { 287 NPE_CHECK_RETURN_ZERO(env, paint); 288 SkPaint::FontMetrics metrics; 289 (void)GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 290 return SkScalarToFloat(metrics.fDescent); 291 } 292 293 static jfloat getFontMetrics(JNIEnv* env, jobject paint, jobject metricsObj) { 294 NPE_CHECK_RETURN_ZERO(env, paint); 295 SkPaint::FontMetrics metrics; 296 SkScalar spacing = GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 297 298 if (metricsObj) { 299 SkASSERT(env->IsInstanceOf(metricsObj, gFontMetrics_class)); 300 env->SetFloatField(metricsObj, gFontMetrics_fieldID.top, SkScalarToFloat(metrics.fTop)); 301 env->SetFloatField(metricsObj, gFontMetrics_fieldID.ascent, SkScalarToFloat(metrics.fAscent)); 302 env->SetFloatField(metricsObj, gFontMetrics_fieldID.descent, SkScalarToFloat(metrics.fDescent)); 303 env->SetFloatField(metricsObj, gFontMetrics_fieldID.bottom, SkScalarToFloat(metrics.fBottom)); 304 env->SetFloatField(metricsObj, gFontMetrics_fieldID.leading, SkScalarToFloat(metrics.fLeading)); 305 } 306 return SkScalarToFloat(spacing); 307 } 308 309 static jint getFontMetricsInt(JNIEnv* env, jobject paint, jobject metricsObj) { 310 NPE_CHECK_RETURN_ZERO(env, paint); 311 SkPaint::FontMetrics metrics; 312 313 GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 314 int ascent = SkScalarRound(metrics.fAscent); 315 int descent = SkScalarRound(metrics.fDescent); 316 int leading = SkScalarRound(metrics.fLeading); 317 318 if (metricsObj) { 319 SkASSERT(env->IsInstanceOf(metricsObj, gFontMetricsInt_class)); 320 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.top, SkScalarFloor(metrics.fTop)); 321 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.ascent, ascent); 322 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.descent, descent); 323 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.bottom, SkScalarCeil(metrics.fBottom)); 324 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.leading, leading); 325 } 326 return descent - ascent + leading; 327 } 328 329 static jfloat measureText_CII(JNIEnv* env, jobject jpaint, jcharArray text, int index, int count) { 330 NPE_CHECK_RETURN_ZERO(env, jpaint); 331 NPE_CHECK_RETURN_ZERO(env, text); 332 333 size_t textLength = env->GetArrayLength(text); 334 335 if ((index | count) < 0 || (size_t)(index + count) > textLength) { 336 doThrow(env, "java/lang/ArrayIndexOutOfBoundsException"); 337 return 0; 338 } 339 340 const SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 341 const jchar* textArray = env->GetCharArrayElements(text, NULL); 342 // we double count, since measureText wants a byteLength 343 SkScalar width = paint->measureText(textArray + index, count << 1); 344 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 345 JNI_ABORT); 346 347 return SkScalarToFloat(width); 348 } 349 350 static jfloat measureText_StringII(JNIEnv* env, jobject jpaint, jstring text, int start, int end) { 351 NPE_CHECK_RETURN_ZERO(env, jpaint); 352 NPE_CHECK_RETURN_ZERO(env, text); 353 354 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 355 const jchar* textArray = env->GetStringChars(text, NULL); 356 size_t textLength = env->GetStringLength(text); 357 358 int count = end - start; 359 if ((start | count) < 0 || (size_t)count > textLength) { 360 doThrow(env, "java/lang/IndexOutOfBoundsException"); 361 return 0; 362 } 363 364 jfloat width = SkScalarToFloat(paint->measureText(textArray + start, count << 1)); 365 env->ReleaseStringChars(text, textArray); 366 return width; 367 } 368 369 static jfloat measureText_String(JNIEnv* env, jobject jpaint, jstring text) { 370 NPE_CHECK_RETURN_ZERO(env, jpaint); 371 NPE_CHECK_RETURN_ZERO(env, text); 372 373 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 374 const jchar* textArray = env->GetStringChars(text, NULL); 375 size_t textLength = env->GetStringLength(text); 376 377 jfloat width = SkScalarToFloat(paint->measureText(textArray, textLength << 1)); 378 env->ReleaseStringChars(text, textArray); 379 return width; 380 } 381 382 static int dotextwidths(JNIEnv* env, SkPaint* paint, const jchar text[], int count, jfloatArray widths) { 383 AutoJavaFloatArray autoWidths(env, widths, count); 384 jfloat* widthsArray = autoWidths.ptr(); 385 SkScalar* scalarArray = (SkScalar*)widthsArray; 386 387 count = paint->getTextWidths(text, count << 1, scalarArray); 388 for (int i = 0; i < count; i++) { 389 widthsArray[i] = SkScalarToFloat(scalarArray[i]); 390 } 391 return count; 392 } 393 394 static int getTextWidths___CII_F(JNIEnv* env, jobject clazz, SkPaint* paint, jcharArray text, int index, int count, jfloatArray widths) { 395 const jchar* textArray = env->GetCharArrayElements(text, NULL); 396 count = dotextwidths(env, paint, textArray + index, count, widths); 397 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 398 JNI_ABORT); 399 return count; 400 } 401 402 static int getTextWidths__StringII_F(JNIEnv* env, jobject clazz, SkPaint* paint, jstring text, int start, int end, jfloatArray widths) { 403 const jchar* textArray = env->GetStringChars(text, NULL); 404 int count = dotextwidths(env, paint, textArray + start, end - start, widths); 405 env->ReleaseStringChars(text, textArray); 406 return count; 407 } 408 409 static jfloat doTextRunAdvances(JNIEnv *env, SkPaint *paint, const jchar *text, 410 jint start, jint count, jint contextCount, jint flags, 411 jfloatArray advances, jint advancesIndex) { 412 jfloat advancesArray[count]; 413 jfloat totalAdvance; 414 415 TextLayout::getTextRunAdvances(paint, text, start, count, contextCount, flags, 416 advancesArray, totalAdvance); 417 418 if (advances != NULL) { 419 env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray); 420 } 421 return totalAdvance; 422 } 423 424 static float getTextRunAdvances___CIIIII_FI(JNIEnv* env, jobject clazz, SkPaint* paint, 425 jcharArray text, jint index, jint count, jint contextIndex, jint contextCount, 426 jint flags, jfloatArray advances, jint advancesIndex) { 427 jchar* textArray = env->GetCharArrayElements(text, NULL); 428 jfloat result = doTextRunAdvances(env, paint, textArray + contextIndex, 429 index - contextIndex, count, contextCount, flags, advances, advancesIndex); 430 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 431 return result; 432 } 433 434 static float getTextRunAdvances__StringIIIII_FI(JNIEnv* env, jobject clazz, SkPaint* paint, 435 jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags, 436 jfloatArray advances, jint advancesIndex) { 437 const jchar* textArray = env->GetStringChars(text, NULL); 438 jfloat result = doTextRunAdvances(env, paint, textArray + contextStart, 439 start - contextStart, end - start, contextEnd - contextStart, flags, advances, 440 advancesIndex); 441 env->ReleaseStringChars(text, textArray); 442 return result; 443 } 444 445 static jint doTextRunCursor(JNIEnv *env, SkPaint* paint, const jchar *text, jint start, 446 jint count, jint flags, jint offset, jint opt) { 447 SkScalar scalarArray[count]; 448 jchar buffer[count]; 449 450 // this is where we'd call harfbuzz 451 // for now we just use ushape.c and widths returned from skia 452 453 int widths; 454 if (flags & 0x1) { // rtl, call arabic shaping in case 455 UErrorCode status = U_ZERO_ERROR; 456 // Use fixed length since we need to keep start and count valid 457 u_shapeArabic(text + start, count, buffer, count, 458 U_SHAPE_LENGTH_FIXED_SPACES_NEAR | U_SHAPE_TEXT_DIRECTION_LOGICAL | 459 U_SHAPE_LETTERS_SHAPE | U_SHAPE_X_LAMALEF_SUB_ALTERNATE, &status); 460 // we shouldn't fail unless there's an out of memory condition, 461 // in which case we're hosed anyway 462 for (int i = 0; i < count; ++i) { 463 if (buffer[i] == 0xffff) { 464 buffer[i] = 0x200b; // zero-width-space for skia 465 } 466 } 467 widths = paint->getTextWidths(buffer, count << 1, scalarArray); 468 } else { 469 widths = paint->getTextWidths(text + start, count << 1, scalarArray); 470 } 471 472 if (widths < count) { 473 // Skia operates on code points, not code units, so surrogate pairs return only one 474 // value. Expand the result so we have one value per UTF-16 code unit. 475 476 // Note, skia's getTextWidth gets confused if it encounters a surrogate pair, 477 // leaving the remaining widths zero. Not nice. 478 const jchar *chars = text + start; 479 for (int i = count, p = widths - 1; --i > p;) { 480 if (chars[i] >= 0xdc00 && chars[i] < 0xe000 && 481 chars[i-1] >= 0xd800 && chars[i-1] < 0xdc00) { 482 scalarArray[i] = 0; 483 } else { 484 scalarArray[i] = scalarArray[--p]; 485 } 486 } 487 } 488 489 jint pos = offset - start; 490 switch (opt) { 491 case AFTER: 492 if (pos < count) { 493 pos += 1; 494 } 495 // fall through 496 case AT_OR_AFTER: 497 while (pos < count && scalarArray[pos] == 0) { 498 ++pos; 499 } 500 break; 501 case BEFORE: 502 if (pos > 0) { 503 --pos; 504 } 505 // fall through 506 case AT_OR_BEFORE: 507 while (pos > 0 && scalarArray[pos] == 0) { 508 --pos; 509 } 510 break; 511 case AT: 512 default: 513 if (scalarArray[pos] == 0) { 514 pos = -1; 515 } 516 break; 517 } 518 519 if (pos != -1) { 520 pos += start; 521 } 522 523 return pos; 524 } 525 526 static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, SkPaint* paint, jcharArray text, 527 jint contextStart, jint contextCount, jint flags, jint offset, jint cursorOpt) { 528 jchar* textArray = env->GetCharArrayElements(text, NULL); 529 jint result = doTextRunCursor(env, paint, textArray, contextStart, contextCount, flags, 530 offset, cursorOpt); 531 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 532 return result; 533 } 534 535 static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, SkPaint* paint, jstring text, 536 jint contextStart, jint contextEnd, jint flags, jint offset, jint cursorOpt) { 537 const jchar* textArray = env->GetStringChars(text, NULL); 538 jint result = doTextRunCursor(env, paint, textArray, contextStart, 539 contextEnd - contextStart, flags, offset, cursorOpt); 540 env->ReleaseStringChars(text, textArray); 541 return result; 542 } 543 544 static void getTextPath(JNIEnv* env, SkPaint* paint, const jchar* text, jint count, 545 jint bidiFlags, jfloat x, jfloat y, SkPath *path) { 546 TextLayout::getTextPath(paint, text, count, bidiFlags, x, y, path); 547 } 548 549 static void getTextPath___C(JNIEnv* env, jobject clazz, SkPaint* paint, jint bidiFlags, 550 jcharArray text, int index, int count, jfloat x, jfloat y, SkPath* path) { 551 const jchar* textArray = env->GetCharArrayElements(text, NULL); 552 getTextPath(env, paint, textArray + index, count, bidiFlags, x, y, path); 553 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); 554 } 555 556 static void getTextPath__String(JNIEnv* env, jobject clazz, SkPaint* paint, jint bidiFlags, 557 jstring text, int start, int end, jfloat x, jfloat y, SkPath* path) { 558 const jchar* textArray = env->GetStringChars(text, NULL); 559 getTextPath(env, paint, textArray + start, end - start, bidiFlags, x, y, path); 560 env->ReleaseStringChars(text, textArray); 561 } 562 563 static void setShadowLayer(JNIEnv* env, jobject jpaint, jfloat radius, 564 jfloat dx, jfloat dy, int color) { 565 NPE_CHECK_RETURN_VOID(env, jpaint); 566 567 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 568 if (radius <= 0) { 569 paint->setLooper(NULL); 570 } 571 else { 572 paint->setLooper(new SkBlurDrawLooper(SkFloatToScalar(radius), 573 SkFloatToScalar(dx), 574 SkFloatToScalar(dy), 575 (SkColor)color))->unref(); 576 } 577 } 578 579 static int breakText(JNIEnv* env, const SkPaint& paint, const jchar text[], 580 int count, float maxWidth, jfloatArray jmeasured, 581 SkPaint::TextBufferDirection tbd) { 582 SkASSERT(paint.getTextEncoding() == SkPaint::kUTF16_TextEncoding); 583 584 SkScalar measured; 585 size_t bytes = paint.breakText(text, count << 1, 586 SkFloatToScalar(maxWidth), &measured, tbd); 587 SkASSERT((bytes & 1) == 0); 588 589 if (jmeasured && env->GetArrayLength(jmeasured) > 0) { 590 AutoJavaFloatArray autoMeasured(env, jmeasured, 1); 591 jfloat* array = autoMeasured.ptr(); 592 array[0] = SkScalarToFloat(measured); 593 } 594 return bytes >> 1; 595 } 596 597 static int breakTextC(JNIEnv* env, jobject jpaint, jcharArray jtext, 598 int index, int count, float maxWidth, jfloatArray jmeasuredWidth) { 599 NPE_CHECK_RETURN_ZERO(env, jpaint); 600 NPE_CHECK_RETURN_ZERO(env, jtext); 601 602 SkPaint::TextBufferDirection tbd; 603 if (count < 0) { 604 tbd = SkPaint::kBackward_TextBufferDirection; 605 count = -count; 606 } 607 else { 608 tbd = SkPaint::kForward_TextBufferDirection; 609 } 610 611 if ((index < 0) || (index + count > env->GetArrayLength(jtext))) { 612 doThrow(env, "java/lang/ArrayIndexOutOfBoundsException"); 613 return 0; 614 } 615 616 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 617 const jchar* text = env->GetCharArrayElements(jtext, NULL); 618 count = breakText(env, *paint, text + index, count, maxWidth, 619 jmeasuredWidth, tbd); 620 env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text), 621 JNI_ABORT); 622 return count; 623 } 624 625 static int breakTextS(JNIEnv* env, jobject jpaint, jstring jtext, 626 bool forwards, float maxWidth, jfloatArray jmeasuredWidth) { 627 NPE_CHECK_RETURN_ZERO(env, jpaint); 628 NPE_CHECK_RETURN_ZERO(env, jtext); 629 630 SkPaint::TextBufferDirection tbd = forwards ? 631 SkPaint::kForward_TextBufferDirection : 632 SkPaint::kBackward_TextBufferDirection; 633 634 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 635 int count = env->GetStringLength(jtext); 636 const jchar* text = env->GetStringChars(jtext, NULL); 637 count = breakText(env, *paint, text, count, maxWidth, 638 jmeasuredWidth, tbd); 639 env->ReleaseStringChars(jtext, text); 640 return count; 641 } 642 643 static void doTextBounds(JNIEnv* env, const jchar* text, int count, 644 jobject bounds, const SkPaint& paint) 645 { 646 SkRect r; 647 SkIRect ir; 648 649 paint.measureText(text, count << 1, &r); 650 r.roundOut(&ir); 651 GraphicsJNI::irect_to_jrect(ir, env, bounds); 652 } 653 654 static void getStringBounds(JNIEnv* env, jobject, const SkPaint* paint, 655 jstring text, int start, int end, jobject bounds) 656 { 657 const jchar* textArray = env->GetStringChars(text, NULL); 658 doTextBounds(env, textArray + start, end - start, bounds, *paint); 659 env->ReleaseStringChars(text, textArray); 660 } 661 662 static void getCharArrayBounds(JNIEnv* env, jobject, const SkPaint* paint, 663 jcharArray text, int index, int count, jobject bounds) 664 { 665 const jchar* textArray = env->GetCharArrayElements(text, NULL); 666 doTextBounds(env, textArray + index, count, bounds, *paint); 667 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 668 JNI_ABORT); 669 } 670 671}; 672 673static JNINativeMethod methods[] = { 674 {"finalizer", "(I)V", (void*) SkPaintGlue::finalizer}, 675 {"native_init","()I", (void*) SkPaintGlue::init}, 676 {"native_initWithPaint","(I)I", (void*) SkPaintGlue::intiWithPaint}, 677 {"native_reset","(I)V", (void*) SkPaintGlue::reset}, 678 {"native_set","(II)V", (void*) SkPaintGlue::assign}, 679 {"getFlags","()I", (void*) SkPaintGlue::getFlags}, 680 {"setFlags","(I)V", (void*) SkPaintGlue::setFlags}, 681 {"setAntiAlias","(Z)V", (void*) SkPaintGlue::setAntiAlias}, 682 {"setSubpixelText","(Z)V", (void*) SkPaintGlue::setSubpixelText}, 683 {"setLinearText","(Z)V", (void*) SkPaintGlue::setLinearText}, 684 {"setUnderlineText","(Z)V", (void*) SkPaintGlue::setUnderlineText}, 685 {"setStrikeThruText","(Z)V", (void*) SkPaintGlue::setStrikeThruText}, 686 {"setFakeBoldText","(Z)V", (void*) SkPaintGlue::setFakeBoldText}, 687 {"setFilterBitmap","(Z)V", (void*) SkPaintGlue::setFilterBitmap}, 688 {"setDither","(Z)V", (void*) SkPaintGlue::setDither}, 689 {"native_getStyle","(I)I", (void*) SkPaintGlue::getStyle}, 690 {"native_setStyle","(II)V", (void*) SkPaintGlue::setStyle}, 691 {"getColor","()I", (void*) SkPaintGlue::getColor}, 692 {"setColor","(I)V", (void*) SkPaintGlue::setColor}, 693 {"getAlpha","()I", (void*) SkPaintGlue::getAlpha}, 694 {"setAlpha","(I)V", (void*) SkPaintGlue::setAlpha}, 695 {"getStrokeWidth","()F", (void*) SkPaintGlue::getStrokeWidth}, 696 {"setStrokeWidth","(F)V", (void*) SkPaintGlue::setStrokeWidth}, 697 {"getStrokeMiter","()F", (void*) SkPaintGlue::getStrokeMiter}, 698 {"setStrokeMiter","(F)V", (void*) SkPaintGlue::setStrokeMiter}, 699 {"native_getStrokeCap","(I)I", (void*) SkPaintGlue::getStrokeCap}, 700 {"native_setStrokeCap","(II)V", (void*) SkPaintGlue::setStrokeCap}, 701 {"native_getStrokeJoin","(I)I", (void*) SkPaintGlue::getStrokeJoin}, 702 {"native_setStrokeJoin","(II)V", (void*) SkPaintGlue::setStrokeJoin}, 703 {"native_getFillPath","(III)Z", (void*) SkPaintGlue::getFillPath}, 704 {"native_setShader","(II)I", (void*) SkPaintGlue::setShader}, 705 {"native_setColorFilter","(II)I", (void*) SkPaintGlue::setColorFilter}, 706 {"native_setXfermode","(II)I", (void*) SkPaintGlue::setXfermode}, 707 {"native_setPathEffect","(II)I", (void*) SkPaintGlue::setPathEffect}, 708 {"native_setMaskFilter","(II)I", (void*) SkPaintGlue::setMaskFilter}, 709 {"native_setTypeface","(II)I", (void*) SkPaintGlue::setTypeface}, 710 {"native_setRasterizer","(II)I", (void*) SkPaintGlue::setRasterizer}, 711 {"native_getTextAlign","(I)I", (void*) SkPaintGlue::getTextAlign}, 712 {"native_setTextAlign","(II)V", (void*) SkPaintGlue::setTextAlign}, 713 {"getTextSize","()F", (void*) SkPaintGlue::getTextSize}, 714 {"setTextSize","(F)V", (void*) SkPaintGlue::setTextSize}, 715 {"getTextScaleX","()F", (void*) SkPaintGlue::getTextScaleX}, 716 {"setTextScaleX","(F)V", (void*) SkPaintGlue::setTextScaleX}, 717 {"getTextSkewX","()F", (void*) SkPaintGlue::getTextSkewX}, 718 {"setTextSkewX","(F)V", (void*) SkPaintGlue::setTextSkewX}, 719 {"ascent","()F", (void*) SkPaintGlue::ascent}, 720 {"descent","()F", (void*) SkPaintGlue::descent}, 721 {"getFontMetrics", "(Landroid/graphics/Paint$FontMetrics;)F", (void*)SkPaintGlue::getFontMetrics}, 722 {"getFontMetricsInt", "(Landroid/graphics/Paint$FontMetricsInt;)I", (void*)SkPaintGlue::getFontMetricsInt}, 723 {"native_measureText","([CII)F", (void*) SkPaintGlue::measureText_CII}, 724 {"native_measureText","(Ljava/lang/String;)F", (void*) SkPaintGlue::measureText_String}, 725 {"native_measureText","(Ljava/lang/String;II)F", (void*) SkPaintGlue::measureText_StringII}, 726 {"native_breakText","([CIIF[F)I", (void*) SkPaintGlue::breakTextC}, 727 {"native_breakText","(Ljava/lang/String;ZF[F)I", (void*) SkPaintGlue::breakTextS}, 728 {"native_getTextWidths","(I[CII[F)I", (void*) SkPaintGlue::getTextWidths___CII_F}, 729 {"native_getTextWidths","(ILjava/lang/String;II[F)I", (void*) SkPaintGlue::getTextWidths__StringII_F}, 730 {"native_getTextRunAdvances","(I[CIIIII[FI)F", (void*) 731 SkPaintGlue::getTextRunAdvances___CIIIII_FI}, 732 {"native_getTextRunAdvances","(ILjava/lang/String;IIIII[FI)F", 733 (void*) SkPaintGlue::getTextRunAdvances__StringIIIII_FI}, 734 {"native_getTextRunCursor", "(I[CIIIII)I", (void*) SkPaintGlue::getTextRunCursor___C}, 735 {"native_getTextRunCursor", "(ILjava/lang/String;IIIII)I", 736 (void*) SkPaintGlue::getTextRunCursor__String}, 737 {"native_getTextPath","(II[CIIFFI)V", (void*) SkPaintGlue::getTextPath___C}, 738 {"native_getTextPath","(IILjava/lang/String;IIFFI)V", (void*) SkPaintGlue::getTextPath__String}, 739 {"nativeGetStringBounds", "(ILjava/lang/String;IILandroid/graphics/Rect;)V", 740 (void*) SkPaintGlue::getStringBounds }, 741 {"nativeGetCharArrayBounds", "(I[CIILandroid/graphics/Rect;)V", 742 (void*) SkPaintGlue::getCharArrayBounds }, 743 {"nSetShadowLayer", "(FFFI)V", (void*)SkPaintGlue::setShadowLayer} 744}; 745 746static jfieldID req_fieldID(jfieldID id) { 747 SkASSERT(id); 748 return id; 749} 750 751int register_android_graphics_Paint(JNIEnv* env) { 752 gFontMetrics_class = env->FindClass("android/graphics/Paint$FontMetrics"); 753 SkASSERT(gFontMetrics_class); 754 gFontMetrics_class = (jclass)env->NewGlobalRef(gFontMetrics_class); 755 756 gFontMetrics_fieldID.top = req_fieldID(env->GetFieldID(gFontMetrics_class, "top", "F")); 757 gFontMetrics_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetrics_class, "ascent", "F")); 758 gFontMetrics_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetrics_class, "descent", "F")); 759 gFontMetrics_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetrics_class, "bottom", "F")); 760 gFontMetrics_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetrics_class, "leading", "F")); 761 762 gFontMetricsInt_class = env->FindClass("android/graphics/Paint$FontMetricsInt"); 763 SkASSERT(gFontMetricsInt_class); 764 gFontMetricsInt_class = (jclass)env->NewGlobalRef(gFontMetricsInt_class); 765 766 gFontMetricsInt_fieldID.top = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "top", "I")); 767 gFontMetricsInt_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "ascent", "I")); 768 gFontMetricsInt_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "descent", "I")); 769 gFontMetricsInt_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "bottom", "I")); 770 gFontMetricsInt_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "leading", "I")); 771 772 int result = AndroidRuntime::registerNativeMethods(env, "android/graphics/Paint", methods, 773 sizeof(methods) / sizeof(methods[0])); 774 return result; 775} 776 777} 778