Paint.cpp revision 36bef0bf30d6bae48cf3837df351075ca4fce654
1/* libs/android_runtime/android/graphics/Paint.cpp 2** 3** Copyright 2006, The Android Open Source Project 4** 5** Licensed under the Apache License, Version 2.0 (the "License"); 6** you may not use this file except in compliance with the License. 7** You may obtain a copy of the License at 8** 9** http://www.apache.org/licenses/LICENSE-2.0 10** 11** Unless required by applicable law or agreed to in writing, software 12** distributed under the License is distributed on an "AS IS" BASIS, 13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14** See the License for the specific language governing permissions and 15** limitations under the License. 16*/ 17 18#define LOG_TAG "Paint" 19 20#include <utils/Log.h> 21 22#include "jni.h" 23#include "GraphicsJNI.h" 24#include <android_runtime/AndroidRuntime.h> 25#include <ScopedUtfChars.h> 26 27#include "SkBlurDrawLooper.h" 28#include "SkColorFilter.h" 29#include "SkMaskFilter.h" 30#include "SkRasterizer.h" 31#include "SkShader.h" 32#include "SkTypeface.h" 33#include "SkXfermode.h" 34#include "unicode/uloc.h" 35#include "unicode/ushape.h" 36#include "TextLayout.h" 37 38// temporary for debugging 39#include <Caches.h> 40#include <utils/Log.h> 41 42namespace android { 43 44struct JMetricsID { 45 jfieldID top; 46 jfieldID ascent; 47 jfieldID descent; 48 jfieldID bottom; 49 jfieldID leading; 50}; 51 52static jclass gFontMetrics_class; 53static JMetricsID gFontMetrics_fieldID; 54 55static jclass gFontMetricsInt_class; 56static JMetricsID gFontMetricsInt_fieldID; 57 58static void defaultSettingsForAndroid(SkPaint* paint) { 59 // GlyphID encoding is required because we are using Harfbuzz shaping 60 paint->setTextEncoding(SkPaint::kGlyphID_TextEncoding); 61 62 SkPaintOptionsAndroid paintOpts = paint->getPaintOptionsAndroid(); 63 paintOpts.setUseFontFallbacks(true); 64 paint->setPaintOptionsAndroid(paintOpts); 65} 66 67class SkPaintGlue { 68public: 69 enum MoveOpt { 70 AFTER, AT_OR_AFTER, BEFORE, AT_OR_BEFORE, AT 71 }; 72 73 static void finalizer(JNIEnv* env, jobject clazz, jlong objHandle) { 74 SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle); 75 delete obj; 76 } 77 78 static jlong init(JNIEnv* env, jobject clazz) { 79 SkPaint* obj = new SkPaint(); 80 defaultSettingsForAndroid(obj); 81 return reinterpret_cast<jlong>(obj); 82 } 83 84 static jlong initWithPaint(JNIEnv* env, jobject clazz, jlong paintHandle) { 85 SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle); 86 SkPaint* obj = new SkPaint(*paint); 87 return reinterpret_cast<jlong>(obj); 88 } 89 90 static void reset(JNIEnv* env, jobject clazz, jlong objHandle) { 91 SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle); 92 obj->reset(); 93 defaultSettingsForAndroid(obj); 94 } 95 96 static void assign(JNIEnv* env, jobject clazz, jlong dstPaintHandle, jlong srcPaintHandle) { 97 SkPaint* dst = reinterpret_cast<SkPaint*>(dstPaintHandle); 98 const SkPaint* src = reinterpret_cast<SkPaint*>(srcPaintHandle); 99 *dst = *src; 100 } 101 102 static jint getFlags(JNIEnv* env, jobject paint) { 103 NPE_CHECK_RETURN_ZERO(env, paint); 104 int result; 105 result = GraphicsJNI::getNativePaint(env, paint)->getFlags(); 106 return static_cast<jint>(result); 107 } 108 109 static void setFlags(JNIEnv* env, jobject paint, jint flags) { 110 NPE_CHECK_RETURN_VOID(env, paint); 111 GraphicsJNI::getNativePaint(env, paint)->setFlags(flags); 112 } 113 114 static jint getHinting(JNIEnv* env, jobject paint) { 115 NPE_CHECK_RETURN_ZERO(env, paint); 116 return GraphicsJNI::getNativePaint(env, paint)->getHinting() 117 == SkPaint::kNo_Hinting ? 0 : 1; 118 } 119 120 static void setHinting(JNIEnv* env, jobject paint, jint mode) { 121 NPE_CHECK_RETURN_VOID(env, paint); 122 GraphicsJNI::getNativePaint(env, paint)->setHinting( 123 mode == 0 ? SkPaint::kNo_Hinting : SkPaint::kNormal_Hinting); 124 } 125 126 static void setAntiAlias(JNIEnv* env, jobject paint, jboolean aa) { 127 NPE_CHECK_RETURN_VOID(env, paint); 128 GraphicsJNI::getNativePaint(env, paint)->setAntiAlias(aa); 129 } 130 131 static void setLinearText(JNIEnv* env, jobject paint, jboolean linearText) { 132 NPE_CHECK_RETURN_VOID(env, paint); 133 GraphicsJNI::getNativePaint(env, paint)->setLinearText(linearText); 134 } 135 136 static void setSubpixelText(JNIEnv* env, jobject paint, jboolean subpixelText) { 137 NPE_CHECK_RETURN_VOID(env, paint); 138 GraphicsJNI::getNativePaint(env, paint)->setSubpixelText(subpixelText); 139 } 140 141 static void setUnderlineText(JNIEnv* env, jobject paint, jboolean underlineText) { 142 NPE_CHECK_RETURN_VOID(env, paint); 143 GraphicsJNI::getNativePaint(env, paint)->setUnderlineText(underlineText); 144 } 145 146 static void setStrikeThruText(JNIEnv* env, jobject paint, jboolean strikeThruText) { 147 NPE_CHECK_RETURN_VOID(env, paint); 148 GraphicsJNI::getNativePaint(env, paint)->setStrikeThruText(strikeThruText); 149 } 150 151 static void setFakeBoldText(JNIEnv* env, jobject paint, jboolean fakeBoldText) { 152 NPE_CHECK_RETURN_VOID(env, paint); 153 GraphicsJNI::getNativePaint(env, paint)->setFakeBoldText(fakeBoldText); 154 } 155 156 static void setFilterBitmap(JNIEnv* env, jobject paint, jboolean filterBitmap) { 157 NPE_CHECK_RETURN_VOID(env, paint); 158 GraphicsJNI::getNativePaint(env, paint)->setFilterBitmap(filterBitmap); 159 } 160 161 static void setDither(JNIEnv* env, jobject paint, jboolean dither) { 162 NPE_CHECK_RETURN_VOID(env, paint); 163 GraphicsJNI::getNativePaint(env, paint)->setDither(dither); 164 } 165 166 static jint getStyle(JNIEnv* env, jobject clazz,jlong objHandle) { 167 SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle); 168 return static_cast<jint>(obj->getStyle()); 169 } 170 171 static void setStyle(JNIEnv* env, jobject clazz, jlong objHandle, jint styleHandle) { 172 SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle); 173 SkPaint::Style style = static_cast<SkPaint::Style>(styleHandle); 174 obj->setStyle(style); 175 } 176 177 static jint getColor(JNIEnv* env, jobject paint) { 178 NPE_CHECK_RETURN_ZERO(env, paint); 179 int color; 180 color = GraphicsJNI::getNativePaint(env, paint)->getColor(); 181 return static_cast<jint>(color); 182 } 183 184 static jint getAlpha(JNIEnv* env, jobject paint) { 185 NPE_CHECK_RETURN_ZERO(env, paint); 186 int alpha; 187 alpha = GraphicsJNI::getNativePaint(env, paint)->getAlpha(); 188 return static_cast<jint>(alpha); 189 } 190 191 static void setColor(JNIEnv* env, jobject paint, jint color) { 192 NPE_CHECK_RETURN_VOID(env, paint); 193 GraphicsJNI::getNativePaint(env, paint)->setColor(color); 194 } 195 196 static void setAlpha(JNIEnv* env, jobject paint, jint a) { 197 NPE_CHECK_RETURN_VOID(env, paint); 198 GraphicsJNI::getNativePaint(env, paint)->setAlpha(a); 199 } 200 201 static jfloat getStrokeWidth(JNIEnv* env, jobject paint) { 202 NPE_CHECK_RETURN_ZERO(env, paint); 203 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeWidth()); 204 } 205 206 static void setStrokeWidth(JNIEnv* env, jobject paint, jfloat width) { 207 NPE_CHECK_RETURN_VOID(env, paint); 208 GraphicsJNI::getNativePaint(env, paint)->setStrokeWidth(SkFloatToScalar(width)); 209 } 210 211 static jfloat getStrokeMiter(JNIEnv* env, jobject paint) { 212 NPE_CHECK_RETURN_ZERO(env, paint); 213 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getStrokeMiter()); 214 } 215 216 static void setStrokeMiter(JNIEnv* env, jobject paint, jfloat miter) { 217 NPE_CHECK_RETURN_VOID(env, paint); 218 GraphicsJNI::getNativePaint(env, paint)->setStrokeMiter(SkFloatToScalar(miter)); 219 } 220 221 static jint getStrokeCap(JNIEnv* env, jobject clazz, jlong objHandle) { 222 SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle); 223 return static_cast<jint>(obj->getStrokeCap()); 224 } 225 226 static void setStrokeCap(JNIEnv* env, jobject clazz, jlong objHandle, jint capHandle) { 227 SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle); 228 SkPaint::Cap cap = static_cast<SkPaint::Cap>(capHandle); 229 obj->setStrokeCap(cap); 230 } 231 232 static jint getStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle) { 233 SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle); 234 return static_cast<jint>(obj->getStrokeJoin()); 235 } 236 237 static void setStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle, jint joinHandle) { 238 SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle); 239 SkPaint::Join join = (SkPaint::Join) joinHandle; 240 obj->setStrokeJoin(join); 241 } 242 243 static jboolean getFillPath(JNIEnv* env, jobject clazz, jlong objHandle, jlong srcHandle, jlong dstHandle) { 244 SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle); 245 SkPath* src = reinterpret_cast<SkPath*>(srcHandle); 246 SkPath* dst = reinterpret_cast<SkPath*>(dstHandle); 247 return obj->getFillPath(*src, dst) ? JNI_TRUE : JNI_FALSE; 248 } 249 250 static jlong setShader(JNIEnv* env, jobject clazz, jlong objHandle, jlong shaderHandle) { 251 SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle); 252 SkShader* shader = reinterpret_cast<SkShader*>(shaderHandle); 253 return reinterpret_cast<jlong>(obj->setShader(shader)); 254 } 255 256 static jlong setColorFilter(JNIEnv* env, jobject clazz, jlong objHandle, jlong filterHandle) { 257 SkPaint* obj = reinterpret_cast<SkPaint *>(objHandle); 258 SkColorFilter* filter = reinterpret_cast<SkColorFilter *>(filterHandle); 259 return reinterpret_cast<jlong>(obj->setColorFilter(filter)); 260 } 261 262 static jlong setXfermode(JNIEnv* env, jobject clazz, jlong objHandle, jlong xfermodeHandle) { 263 SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle); 264 SkXfermode* xfermode = reinterpret_cast<SkXfermode*>(xfermodeHandle); 265 return reinterpret_cast<jlong>(obj->setXfermode(xfermode)); 266 } 267 268 static jlong setPathEffect(JNIEnv* env, jobject clazz, jlong objHandle, jlong effectHandle) { 269 SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle); 270 SkPathEffect* effect = reinterpret_cast<SkPathEffect*>(effectHandle); 271 return reinterpret_cast<jlong>(obj->setPathEffect(effect)); 272 } 273 274 static jlong setMaskFilter(JNIEnv* env, jobject clazz, jlong objHandle, jlong maskfilterHandle) { 275 SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle); 276 SkMaskFilter* maskfilter = reinterpret_cast<SkMaskFilter*>(maskfilterHandle); 277 return reinterpret_cast<jlong>(obj->setMaskFilter(maskfilter)); 278 } 279 280 static jlong setTypeface(JNIEnv* env, jobject clazz, jlong objHandle, jlong typefaceHandle) { 281#ifndef USE_MINIKIN 282 SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle); 283 SkTypeface* typeface = reinterpret_cast<SkTypeface*>(typefaceHandle); 284 return reinterpret_cast<jlong>(obj->setTypeface(typeface)); 285#else 286 // TODO(raph): not yet implemented 287 return NULL; 288#endif 289 } 290 291 static jlong setRasterizer(JNIEnv* env, jobject clazz, jlong objHandle, jlong rasterizerHandle) { 292 SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle); 293 SkRasterizer* rasterizer = reinterpret_cast<SkRasterizer*>(rasterizerHandle); 294 return reinterpret_cast<jlong>(obj->setRasterizer(rasterizer)); 295 } 296 297 static jint getTextAlign(JNIEnv* env, jobject clazz, jlong objHandle) { 298 SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle); 299 return static_cast<jint>(obj->getTextAlign()); 300 } 301 302 static void setTextAlign(JNIEnv* env, jobject clazz, jlong objHandle, jint alignHandle) { 303 SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle); 304 SkPaint::Align align = static_cast<SkPaint::Align>(alignHandle); 305 obj->setTextAlign(align); 306 } 307 308 // generate bcp47 identifier for the supplied locale 309 static void toLanguageTag(char* output, size_t outSize, 310 const char* locale) { 311 if (output == NULL || outSize <= 0) { 312 return; 313 } 314 if (locale == NULL) { 315 output[0] = '\0'; 316 return; 317 } 318 char canonicalChars[ULOC_FULLNAME_CAPACITY]; 319 UErrorCode uErr = U_ZERO_ERROR; 320 uloc_canonicalize(locale, canonicalChars, ULOC_FULLNAME_CAPACITY, 321 &uErr); 322 if (U_SUCCESS(uErr)) { 323 char likelyChars[ULOC_FULLNAME_CAPACITY]; 324 uErr = U_ZERO_ERROR; 325 uloc_addLikelySubtags(canonicalChars, likelyChars, 326 ULOC_FULLNAME_CAPACITY, &uErr); 327 if (U_SUCCESS(uErr)) { 328 uErr = U_ZERO_ERROR; 329 uloc_toLanguageTag(likelyChars, output, outSize, FALSE, &uErr); 330 if (U_SUCCESS(uErr)) { 331 return; 332 } else { 333 ALOGD("uloc_toLanguageTag(\"%s\") failed: %s", likelyChars, 334 u_errorName(uErr)); 335 } 336 } else { 337 ALOGD("uloc_addLikelySubtags(\"%s\") failed: %s", 338 canonicalChars, u_errorName(uErr)); 339 } 340 } else { 341 ALOGD("uloc_canonicalize(\"%s\") failed: %s", locale, 342 u_errorName(uErr)); 343 } 344 // unable to build a proper language identifier 345 output[0] = '\0'; 346 } 347 348 static void setTextLocale(JNIEnv* env, jobject clazz, jlong objHandle, jstring locale) { 349 SkPaint* obj = reinterpret_cast<SkPaint*>(objHandle); 350 ScopedUtfChars localeChars(env, locale); 351 char langTag[ULOC_FULLNAME_CAPACITY]; 352 toLanguageTag(langTag, ULOC_FULLNAME_CAPACITY, localeChars.c_str()); 353 354 SkPaintOptionsAndroid paintOpts = obj->getPaintOptionsAndroid(); 355 paintOpts.setLanguage(langTag); 356 obj->setPaintOptionsAndroid(paintOpts); 357 } 358 359 static jfloat getTextSize(JNIEnv* env, jobject paint) { 360 NPE_CHECK_RETURN_ZERO(env, paint); 361 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSize()); 362 } 363 364 static void setTextSize(JNIEnv* env, jobject paint, jfloat textSize) { 365 NPE_CHECK_RETURN_VOID(env, paint); 366 GraphicsJNI::getNativePaint(env, paint)->setTextSize(SkFloatToScalar(textSize)); 367 } 368 369 static jfloat getTextScaleX(JNIEnv* env, jobject paint) { 370 NPE_CHECK_RETURN_ZERO(env, paint); 371 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextScaleX()); 372 } 373 374 static void setTextScaleX(JNIEnv* env, jobject paint, jfloat scaleX) { 375 NPE_CHECK_RETURN_VOID(env, paint); 376 GraphicsJNI::getNativePaint(env, paint)->setTextScaleX(SkFloatToScalar(scaleX)); 377 } 378 379 static jfloat getTextSkewX(JNIEnv* env, jobject paint) { 380 NPE_CHECK_RETURN_ZERO(env, paint); 381 return SkScalarToFloat(GraphicsJNI::getNativePaint(env, paint)->getTextSkewX()); 382 } 383 384 static void setTextSkewX(JNIEnv* env, jobject paint, jfloat skewX) { 385 NPE_CHECK_RETURN_VOID(env, paint); 386 GraphicsJNI::getNativePaint(env, paint)->setTextSkewX(SkFloatToScalar(skewX)); 387 } 388 389 static jfloat ascent(JNIEnv* env, jobject paint) { 390 NPE_CHECK_RETURN_ZERO(env, paint); 391 SkPaint::FontMetrics metrics; 392 (void)GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 393 return SkScalarToFloat(metrics.fAscent); 394 } 395 396 static jfloat descent(JNIEnv* env, jobject paint) { 397 NPE_CHECK_RETURN_ZERO(env, paint); 398 SkPaint::FontMetrics metrics; 399 (void)GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 400 return SkScalarToFloat(metrics.fDescent); 401 } 402 403 static jfloat getFontMetrics(JNIEnv* env, jobject paint, jobject metricsObj) { 404 NPE_CHECK_RETURN_ZERO(env, paint); 405 SkPaint::FontMetrics metrics; 406 SkScalar spacing = GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 407 408 if (metricsObj) { 409 SkASSERT(env->IsInstanceOf(metricsObj, gFontMetrics_class)); 410 env->SetFloatField(metricsObj, gFontMetrics_fieldID.top, SkScalarToFloat(metrics.fTop)); 411 env->SetFloatField(metricsObj, gFontMetrics_fieldID.ascent, SkScalarToFloat(metrics.fAscent)); 412 env->SetFloatField(metricsObj, gFontMetrics_fieldID.descent, SkScalarToFloat(metrics.fDescent)); 413 env->SetFloatField(metricsObj, gFontMetrics_fieldID.bottom, SkScalarToFloat(metrics.fBottom)); 414 env->SetFloatField(metricsObj, gFontMetrics_fieldID.leading, SkScalarToFloat(metrics.fLeading)); 415 } 416 return SkScalarToFloat(spacing); 417 } 418 419 static jint getFontMetricsInt(JNIEnv* env, jobject paint, jobject metricsObj) { 420 NPE_CHECK_RETURN_ZERO(env, paint); 421 SkPaint::FontMetrics metrics; 422 423 GraphicsJNI::getNativePaint(env, paint)->getFontMetrics(&metrics); 424 int ascent = SkScalarRound(metrics.fAscent); 425 int descent = SkScalarRound(metrics.fDescent); 426 int leading = SkScalarRound(metrics.fLeading); 427 428 if (metricsObj) { 429 SkASSERT(env->IsInstanceOf(metricsObj, gFontMetricsInt_class)); 430 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.top, SkScalarFloor(metrics.fTop)); 431 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.ascent, ascent); 432 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.descent, descent); 433 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.bottom, SkScalarCeil(metrics.fBottom)); 434 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.leading, leading); 435 } 436 return descent - ascent + leading; 437 } 438 439 static jfloat measureText_CIII(JNIEnv* env, jobject jpaint, jcharArray text, jint index, jint count, 440 jint bidiFlags) { 441 NPE_CHECK_RETURN_ZERO(env, jpaint); 442 NPE_CHECK_RETURN_ZERO(env, text); 443 444 size_t textLength = env->GetArrayLength(text); 445 if ((index | count) < 0 || (size_t)(index + count) > textLength) { 446 doThrowAIOOBE(env); 447 return 0; 448 } 449 if (count == 0) { 450 return 0; 451 } 452 453 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 454 const jchar* textArray = env->GetCharArrayElements(text, NULL); 455 jfloat result = 0; 456 457 TextLayout::getTextRunAdvances(paint, textArray, index, count, textLength, 458 bidiFlags, NULL /* dont need all advances */, &result); 459 460 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); 461 return result; 462 } 463 464 static jfloat measureText_StringIII(JNIEnv* env, jobject jpaint, jstring text, jint start, jint end, 465 jint bidiFlags) { 466 NPE_CHECK_RETURN_ZERO(env, jpaint); 467 NPE_CHECK_RETURN_ZERO(env, text); 468 469 size_t textLength = env->GetStringLength(text); 470 int count = end - start; 471 if ((start | count) < 0 || (size_t)end > textLength) { 472 doThrowAIOOBE(env); 473 return 0; 474 } 475 if (count == 0) { 476 return 0; 477 } 478 479 const jchar* textArray = env->GetStringChars(text, NULL); 480 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 481 jfloat width = 0; 482 483 TextLayout::getTextRunAdvances(paint, textArray, start, count, textLength, 484 bidiFlags, NULL /* dont need all advances */, &width); 485 486 env->ReleaseStringChars(text, textArray); 487 return width; 488 } 489 490 static jfloat measureText_StringI(JNIEnv* env, jobject jpaint, jstring text, jint bidiFlags) { 491 NPE_CHECK_RETURN_ZERO(env, jpaint); 492 NPE_CHECK_RETURN_ZERO(env, text); 493 494 size_t textLength = env->GetStringLength(text); 495 if (textLength == 0) { 496 return 0; 497 } 498 499 const jchar* textArray = env->GetStringChars(text, NULL); 500 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 501 jfloat width = 0; 502 503 TextLayout::getTextRunAdvances(paint, textArray, 0, textLength, textLength, 504 bidiFlags, NULL /* dont need all advances */, &width); 505 506 env->ReleaseStringChars(text, textArray); 507 return width; 508 } 509 510 static int dotextwidths(JNIEnv* env, SkPaint* paint, const jchar text[], int count, jfloatArray widths, 511 jint bidiFlags) { 512 NPE_CHECK_RETURN_ZERO(env, paint); 513 NPE_CHECK_RETURN_ZERO(env, text); 514 515 if (count < 0 || !widths) { 516 doThrowAIOOBE(env); 517 return 0; 518 } 519 if (count == 0) { 520 return 0; 521 } 522 size_t widthsLength = env->GetArrayLength(widths); 523 if ((size_t)count > widthsLength) { 524 doThrowAIOOBE(env); 525 return 0; 526 } 527 528 AutoJavaFloatArray autoWidths(env, widths, count); 529 jfloat* widthsArray = autoWidths.ptr(); 530 531 TextLayout::getTextRunAdvances(paint, text, 0, count, count, 532 bidiFlags, widthsArray, NULL /* dont need totalAdvance */); 533 534 return count; 535 } 536 537 static jint getTextWidths___CIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jcharArray text, 538 jint index, jint count, jint bidiFlags, jfloatArray widths) { 539 SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle); 540 const jchar* textArray = env->GetCharArrayElements(text, NULL); 541 count = dotextwidths(env, paint, textArray + index, count, widths, bidiFlags); 542 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 543 JNI_ABORT); 544 return count; 545 } 546 547 static jint getTextWidths__StringIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jstring text, 548 jint start, jint end, jint bidiFlags, jfloatArray widths) { 549 SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle); 550 const jchar* textArray = env->GetStringChars(text, NULL); 551 int count = dotextwidths(env, paint, textArray + start, end - start, widths, bidiFlags); 552 env->ReleaseStringChars(text, textArray); 553 return count; 554 } 555 556 static int doTextGlyphs(JNIEnv* env, SkPaint* paint, const jchar* text, jint start, jint count, 557 jint contextCount, jint flags, jcharArray glyphs) { 558 NPE_CHECK_RETURN_ZERO(env, paint); 559 NPE_CHECK_RETURN_ZERO(env, text); 560 561 if ((start | count | contextCount) < 0 || contextCount < count || !glyphs) { 562 doThrowAIOOBE(env); 563 return 0; 564 } 565 if (count == 0) { 566 return 0; 567 } 568 size_t glypthsLength = env->GetArrayLength(glyphs); 569 if ((size_t)count > glypthsLength) { 570 doThrowAIOOBE(env); 571 return 0; 572 } 573 574 jchar* glyphsArray = env->GetCharArrayElements(glyphs, NULL); 575 576 sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(paint, 577 text, start, count, contextCount, flags); 578 const jchar* shapedGlyphs = value->getGlyphs(); 579 size_t glyphsCount = value->getGlyphsCount(); 580 memcpy(glyphsArray, shapedGlyphs, sizeof(jchar) * glyphsCount); 581 582 env->ReleaseCharArrayElements(glyphs, glyphsArray, JNI_ABORT); 583 return glyphsCount; 584 } 585 586 static jint getTextGlyphs__StringIIIII_C(JNIEnv* env, jobject clazz, jlong paintHandle, 587 jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags, 588 jcharArray glyphs) { 589 SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle); 590 const jchar* textArray = env->GetStringChars(text, NULL); 591 int count = doTextGlyphs(env, paint, textArray + contextStart, start - contextStart, 592 end - start, contextEnd - contextStart, flags, glyphs); 593 env->ReleaseStringChars(text, textArray); 594 return count; 595 } 596 597 static jfloat doTextRunAdvances(JNIEnv *env, SkPaint *paint, const jchar *text, 598 jint start, jint count, jint contextCount, jint flags, 599 jfloatArray advances, jint advancesIndex) { 600 NPE_CHECK_RETURN_ZERO(env, paint); 601 NPE_CHECK_RETURN_ZERO(env, text); 602 603 if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) { 604 doThrowAIOOBE(env); 605 return 0; 606 } 607 if (count == 0) { 608 return 0; 609 } 610 if (advances) { 611 size_t advancesLength = env->GetArrayLength(advances); 612 if ((size_t)count > advancesLength) { 613 doThrowAIOOBE(env); 614 return 0; 615 } 616 } 617 jfloat advancesArray[count]; 618 jfloat totalAdvance = 0; 619 620 TextLayout::getTextRunAdvances(paint, text, start, count, contextCount, flags, 621 advancesArray, &totalAdvance); 622 623 if (advances != NULL) { 624 env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray); 625 } 626 return totalAdvance; 627 } 628 629 static jfloat getTextRunAdvances___CIIIII_FI(JNIEnv* env, jobject clazz, jlong paintHandle, 630 jcharArray text, jint index, jint count, jint contextIndex, jint contextCount, 631 jint flags, jfloatArray advances, jint advancesIndex) { 632 SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle); 633 jchar* textArray = env->GetCharArrayElements(text, NULL); 634 jfloat result = doTextRunAdvances(env, paint, textArray + contextIndex, 635 index - contextIndex, count, contextCount, flags, advances, advancesIndex); 636 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 637 return result; 638 } 639 640 static jfloat getTextRunAdvances__StringIIIII_FI(JNIEnv* env, jobject clazz, jlong paintHandle, 641 jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint flags, 642 jfloatArray advances, jint advancesIndex) { 643 SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle); 644 const jchar* textArray = env->GetStringChars(text, NULL); 645 jfloat result = doTextRunAdvances(env, paint, textArray + contextStart, 646 start - contextStart, end - start, contextEnd - contextStart, flags, 647 advances, advancesIndex); 648 env->ReleaseStringChars(text, textArray); 649 return result; 650 } 651 652 static jint doTextRunCursor(JNIEnv *env, SkPaint* paint, const jchar *text, jint start, 653 jint count, jint flags, jint offset, jint opt) { 654 jfloat scalarArray[count]; 655 656 TextLayout::getTextRunAdvances(paint, text, start, count, start + count, flags, 657 scalarArray, NULL /* dont need totalAdvance */); 658 659 jint pos = offset - start; 660 switch (opt) { 661 case AFTER: 662 if (pos < count) { 663 pos += 1; 664 } 665 // fall through 666 case AT_OR_AFTER: 667 while (pos < count && scalarArray[pos] == 0) { 668 ++pos; 669 } 670 break; 671 case BEFORE: 672 if (pos > 0) { 673 --pos; 674 } 675 // fall through 676 case AT_OR_BEFORE: 677 while (pos > 0 && scalarArray[pos] == 0) { 678 --pos; 679 } 680 break; 681 case AT: 682 default: 683 if (scalarArray[pos] == 0) { 684 pos = -1; 685 } 686 break; 687 } 688 689 if (pos != -1) { 690 pos += start; 691 } 692 693 return pos; 694 } 695 696 static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, jlong paintHandle, jcharArray text, 697 jint contextStart, jint contextCount, jint flags, jint offset, jint cursorOpt) { 698 SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle); 699 jchar* textArray = env->GetCharArrayElements(text, NULL); 700 jint result = doTextRunCursor(env, paint, textArray, contextStart, contextCount, flags, 701 offset, cursorOpt); 702 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 703 return result; 704 } 705 706 static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, jlong paintHandle, jstring text, 707 jint contextStart, jint contextEnd, jint flags, jint offset, jint cursorOpt) { 708 SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle); 709 const jchar* textArray = env->GetStringChars(text, NULL); 710 jint result = doTextRunCursor(env, paint, textArray, contextStart, 711 contextEnd - contextStart, flags, offset, cursorOpt); 712 env->ReleaseStringChars(text, textArray); 713 return result; 714 } 715 716 static void getTextPath(JNIEnv* env, SkPaint* paint, const jchar* text, jint count, 717 jint bidiFlags, jfloat x, jfloat y, SkPath *path) { 718 TextLayout::getTextPath(paint, text, count, bidiFlags, x, y, path); 719 } 720 721 static void getTextPath___C(JNIEnv* env, jobject clazz, jlong paintHandle, jint bidiFlags, 722 jcharArray text, jint index, jint count, jfloat x, jfloat y, jlong pathHandle) { 723 SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle); 724 SkPath* path = reinterpret_cast<SkPath*>(pathHandle); 725 const jchar* textArray = env->GetCharArrayElements(text, NULL); 726 getTextPath(env, paint, textArray + index, count, bidiFlags, x, y, path); 727 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); 728 } 729 730 static void getTextPath__String(JNIEnv* env, jobject clazz, jlong paintHandle, jint bidiFlags, 731 jstring text, jint start, jint end, jfloat x, jfloat y, jlong pathHandle) { 732 SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle); 733 SkPath* path = reinterpret_cast<SkPath*>(pathHandle); 734 const jchar* textArray = env->GetStringChars(text, NULL); 735 getTextPath(env, paint, textArray + start, end - start, bidiFlags, x, y, path); 736 env->ReleaseStringChars(text, textArray); 737 } 738 739 static void setShadowLayer(JNIEnv* env, jobject jpaint, jfloat radius, 740 jfloat dx, jfloat dy, jint color) { 741 NPE_CHECK_RETURN_VOID(env, jpaint); 742 743 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 744 if (radius <= 0) { 745 paint->setLooper(NULL); 746 } 747 else { 748 paint->setLooper(new SkBlurDrawLooper(SkFloatToScalar(radius), 749 SkFloatToScalar(dx), 750 SkFloatToScalar(dy), 751 (SkColor)color))->unref(); 752 } 753 } 754 755 static int breakText(JNIEnv* env, SkPaint& paint, const jchar text[], 756 int count, float maxWidth, jint bidiFlags, jfloatArray jmeasured, 757 SkPaint::TextBufferDirection tbd) { 758 sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(&paint, 759 text, 0, count, count, bidiFlags); 760 if (value == NULL) { 761 return 0; 762 } 763 SkScalar measured; 764 size_t bytes = paint.breakText(value->getGlyphs(), value->getGlyphsCount() << 1, 765 SkFloatToScalar(maxWidth), &measured, tbd); 766 SkASSERT((bytes & 1) == 0); 767 768 if (jmeasured && env->GetArrayLength(jmeasured) > 0) { 769 AutoJavaFloatArray autoMeasured(env, jmeasured, 1); 770 jfloat* array = autoMeasured.ptr(); 771 array[0] = SkScalarToFloat(measured); 772 } 773 return bytes >> 1; 774 } 775 776 static jint breakTextC(JNIEnv* env, jobject jpaint, jcharArray jtext, 777 jint index, jint count, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) { 778 NPE_CHECK_RETURN_ZERO(env, jpaint); 779 NPE_CHECK_RETURN_ZERO(env, jtext); 780 781 SkPaint::TextBufferDirection tbd; 782 if (count < 0) { 783 tbd = SkPaint::kBackward_TextBufferDirection; 784 count = -count; 785 } 786 else { 787 tbd = SkPaint::kForward_TextBufferDirection; 788 } 789 790 if ((index < 0) || (index + count > env->GetArrayLength(jtext))) { 791 doThrowAIOOBE(env); 792 return 0; 793 } 794 795 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 796 const jchar* text = env->GetCharArrayElements(jtext, NULL); 797 count = breakText(env, *paint, text + index, count, maxWidth, 798 bidiFlags, jmeasuredWidth, tbd); 799 env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text), 800 JNI_ABORT); 801 return count; 802 } 803 804 static jint breakTextS(JNIEnv* env, jobject jpaint, jstring jtext, 805 jboolean forwards, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) { 806 NPE_CHECK_RETURN_ZERO(env, jpaint); 807 NPE_CHECK_RETURN_ZERO(env, jtext); 808 809 SkPaint::TextBufferDirection tbd = forwards ? 810 SkPaint::kForward_TextBufferDirection : 811 SkPaint::kBackward_TextBufferDirection; 812 813 SkPaint* paint = GraphicsJNI::getNativePaint(env, jpaint); 814 int count = env->GetStringLength(jtext); 815 const jchar* text = env->GetStringChars(jtext, NULL); 816 count = breakText(env, *paint, text, count, maxWidth, bidiFlags, jmeasuredWidth, tbd); 817 env->ReleaseStringChars(jtext, text); 818 return count; 819 } 820 821 static void doTextBounds(JNIEnv* env, const jchar* text, int count, 822 jobject bounds, const SkPaint& paint, jint bidiFlags) { 823 SkRect r; 824 SkIRect ir; 825 826 sp<TextLayoutValue> value = TextLayoutEngine::getInstance().getValue(&paint, 827 text, 0, count, count, bidiFlags); 828 if (value == NULL) { 829 return; 830 } 831 paint.measureText(value->getGlyphs(), value->getGlyphsCount() << 1, &r); 832 r.roundOut(&ir); 833 GraphicsJNI::irect_to_jrect(ir, env, bounds); 834 } 835 836 static void getStringBounds(JNIEnv* env, jobject, jlong paintHandle, 837 jstring text, jint start, jint end, jint bidiFlags, jobject bounds) { 838 const SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle);; 839 const jchar* textArray = env->GetStringChars(text, NULL); 840 doTextBounds(env, textArray + start, end - start, bounds, *paint, bidiFlags); 841 env->ReleaseStringChars(text, textArray); 842 } 843 844 static void getCharArrayBounds(JNIEnv* env, jobject, jlong paintHandle, 845 jcharArray text, jint index, jint count, jint bidiFlags, jobject bounds) { 846 const SkPaint* paint = reinterpret_cast<SkPaint*>(paintHandle); 847 const jchar* textArray = env->GetCharArrayElements(text, NULL); 848 doTextBounds(env, textArray + index, count, bounds, *paint, bidiFlags); 849 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 850 JNI_ABORT); 851 } 852 853}; 854 855static JNINativeMethod methods[] = { 856 {"finalizer", "(J)V", (void*) SkPaintGlue::finalizer}, 857 {"native_init","()J", (void*) SkPaintGlue::init}, 858 {"native_initWithPaint","(J)J", (void*) SkPaintGlue::initWithPaint}, 859 {"native_reset","(J)V", (void*) SkPaintGlue::reset}, 860 {"native_set","(JJ)V", (void*) SkPaintGlue::assign}, 861 {"getFlags","()I", (void*) SkPaintGlue::getFlags}, 862 {"setFlags","(I)V", (void*) SkPaintGlue::setFlags}, 863 {"getHinting","()I", (void*) SkPaintGlue::getHinting}, 864 {"setHinting","(I)V", (void*) SkPaintGlue::setHinting}, 865 {"setAntiAlias","(Z)V", (void*) SkPaintGlue::setAntiAlias}, 866 {"setSubpixelText","(Z)V", (void*) SkPaintGlue::setSubpixelText}, 867 {"setLinearText","(Z)V", (void*) SkPaintGlue::setLinearText}, 868 {"setUnderlineText","(Z)V", (void*) SkPaintGlue::setUnderlineText}, 869 {"setStrikeThruText","(Z)V", (void*) SkPaintGlue::setStrikeThruText}, 870 {"setFakeBoldText","(Z)V", (void*) SkPaintGlue::setFakeBoldText}, 871 {"setFilterBitmap","(Z)V", (void*) SkPaintGlue::setFilterBitmap}, 872 {"setDither","(Z)V", (void*) SkPaintGlue::setDither}, 873 {"native_getStyle","(J)I", (void*) SkPaintGlue::getStyle}, 874 {"native_setStyle","(JI)V", (void*) SkPaintGlue::setStyle}, 875 {"getColor","()I", (void*) SkPaintGlue::getColor}, 876 {"setColor","(I)V", (void*) SkPaintGlue::setColor}, 877 {"getAlpha","()I", (void*) SkPaintGlue::getAlpha}, 878 {"setAlpha","(I)V", (void*) SkPaintGlue::setAlpha}, 879 {"getStrokeWidth","()F", (void*) SkPaintGlue::getStrokeWidth}, 880 {"setStrokeWidth","(F)V", (void*) SkPaintGlue::setStrokeWidth}, 881 {"getStrokeMiter","()F", (void*) SkPaintGlue::getStrokeMiter}, 882 {"setStrokeMiter","(F)V", (void*) SkPaintGlue::setStrokeMiter}, 883 {"native_getStrokeCap","(J)I", (void*) SkPaintGlue::getStrokeCap}, 884 {"native_setStrokeCap","(JI)V", (void*) SkPaintGlue::setStrokeCap}, 885 {"native_getStrokeJoin","(J)I", (void*) SkPaintGlue::getStrokeJoin}, 886 {"native_setStrokeJoin","(JI)V", (void*) SkPaintGlue::setStrokeJoin}, 887 {"native_getFillPath","(JJJ)Z", (void*) SkPaintGlue::getFillPath}, 888 {"native_setShader","(JJ)J", (void*) SkPaintGlue::setShader}, 889 {"native_setColorFilter","(JJ)J", (void*) SkPaintGlue::setColorFilter}, 890 {"native_setXfermode","(JJ)J", (void*) SkPaintGlue::setXfermode}, 891 {"native_setPathEffect","(JJ)J", (void*) SkPaintGlue::setPathEffect}, 892 {"native_setMaskFilter","(JJ)J", (void*) SkPaintGlue::setMaskFilter}, 893 {"native_setTypeface","(JJ)J", (void*) SkPaintGlue::setTypeface}, 894 {"native_setRasterizer","(JJ)J", (void*) SkPaintGlue::setRasterizer}, 895 {"native_getTextAlign","(J)I", (void*) SkPaintGlue::getTextAlign}, 896 {"native_setTextAlign","(JI)V", (void*) SkPaintGlue::setTextAlign}, 897 {"native_setTextLocale","(JLjava/lang/String;)V", (void*) SkPaintGlue::setTextLocale}, 898 {"getTextSize","()F", (void*) SkPaintGlue::getTextSize}, 899 {"setTextSize","(F)V", (void*) SkPaintGlue::setTextSize}, 900 {"getTextScaleX","()F", (void*) SkPaintGlue::getTextScaleX}, 901 {"setTextScaleX","(F)V", (void*) SkPaintGlue::setTextScaleX}, 902 {"getTextSkewX","()F", (void*) SkPaintGlue::getTextSkewX}, 903 {"setTextSkewX","(F)V", (void*) SkPaintGlue::setTextSkewX}, 904 {"ascent","()F", (void*) SkPaintGlue::ascent}, 905 {"descent","()F", (void*) SkPaintGlue::descent}, 906 {"getFontMetrics", "(Landroid/graphics/Paint$FontMetrics;)F", (void*)SkPaintGlue::getFontMetrics}, 907 {"getFontMetricsInt", "(Landroid/graphics/Paint$FontMetricsInt;)I", (void*)SkPaintGlue::getFontMetricsInt}, 908 {"native_measureText","([CIII)F", (void*) SkPaintGlue::measureText_CIII}, 909 {"native_measureText","(Ljava/lang/String;I)F", (void*) SkPaintGlue::measureText_StringI}, 910 {"native_measureText","(Ljava/lang/String;III)F", (void*) SkPaintGlue::measureText_StringIII}, 911 {"native_breakText","([CIIFI[F)I", (void*) SkPaintGlue::breakTextC}, 912 {"native_breakText","(Ljava/lang/String;ZFI[F)I", (void*) SkPaintGlue::breakTextS}, 913 {"native_getTextWidths","(J[CIII[F)I", (void*) SkPaintGlue::getTextWidths___CIII_F}, 914 {"native_getTextWidths","(JLjava/lang/String;III[F)I", (void*) SkPaintGlue::getTextWidths__StringIII_F}, 915 {"native_getTextRunAdvances","(J[CIIIII[FI)F", 916 (void*) SkPaintGlue::getTextRunAdvances___CIIIII_FI}, 917 {"native_getTextRunAdvances","(JLjava/lang/String;IIIII[FI)F", 918 (void*) SkPaintGlue::getTextRunAdvances__StringIIIII_FI}, 919 920 921 {"native_getTextGlyphs","(JLjava/lang/String;IIIII[C)I", 922 (void*) SkPaintGlue::getTextGlyphs__StringIIIII_C}, 923 {"native_getTextRunCursor", "(J[CIIIII)I", (void*) SkPaintGlue::getTextRunCursor___C}, 924 {"native_getTextRunCursor", "(JLjava/lang/String;IIIII)I", 925 (void*) SkPaintGlue::getTextRunCursor__String}, 926 {"native_getTextPath","(JI[CIIFFJ)V", (void*) SkPaintGlue::getTextPath___C}, 927 {"native_getTextPath","(JILjava/lang/String;IIFFJ)V", (void*) SkPaintGlue::getTextPath__String}, 928 {"nativeGetStringBounds", "(JLjava/lang/String;IIILandroid/graphics/Rect;)V", 929 (void*) SkPaintGlue::getStringBounds }, 930 {"nativeGetCharArrayBounds", "(J[CIIILandroid/graphics/Rect;)V", 931 (void*) SkPaintGlue::getCharArrayBounds }, 932 {"nSetShadowLayer", "(FFFI)V", (void*)SkPaintGlue::setShadowLayer} 933}; 934 935static jfieldID req_fieldID(jfieldID id) { 936 SkASSERT(id); 937 return id; 938} 939 940int register_android_graphics_Paint(JNIEnv* env) { 941 gFontMetrics_class = env->FindClass("android/graphics/Paint$FontMetrics"); 942 SkASSERT(gFontMetrics_class); 943 gFontMetrics_class = (jclass)env->NewGlobalRef(gFontMetrics_class); 944 945 gFontMetrics_fieldID.top = req_fieldID(env->GetFieldID(gFontMetrics_class, "top", "F")); 946 gFontMetrics_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetrics_class, "ascent", "F")); 947 gFontMetrics_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetrics_class, "descent", "F")); 948 gFontMetrics_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetrics_class, "bottom", "F")); 949 gFontMetrics_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetrics_class, "leading", "F")); 950 951 gFontMetricsInt_class = env->FindClass("android/graphics/Paint$FontMetricsInt"); 952 SkASSERT(gFontMetricsInt_class); 953 gFontMetricsInt_class = (jclass)env->NewGlobalRef(gFontMetricsInt_class); 954 955 gFontMetricsInt_fieldID.top = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "top", "I")); 956 gFontMetricsInt_fieldID.ascent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "ascent", "I")); 957 gFontMetricsInt_fieldID.descent = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "descent", "I")); 958 gFontMetricsInt_fieldID.bottom = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "bottom", "I")); 959 gFontMetricsInt_fieldID.leading = req_fieldID(env->GetFieldID(gFontMetricsInt_class, "leading", "I")); 960 961 int result = AndroidRuntime::registerNativeMethods(env, "android/graphics/Paint", methods, 962 sizeof(methods) / sizeof(methods[0])); 963 return result; 964} 965 966} 967