1 #define LOG_TAG "BitmapFactory" 2 3 #include "BitmapFactory.h" 4 #include "NinePatchPeeker.h" 5 #include "SkFrontBufferedStream.h" 6 #include "SkImageDecoder.h" 7 #include "SkMath.h" 8 #include "SkPixelRef.h" 9 #include "SkStream.h" 10 #include "SkTemplates.h" 11 #include "SkUtils.h" 12 #include "CreateJavaOutputStreamAdaptor.h" 13 #include "AutoDecodeCancel.h" 14 #include "Utils.h" 15 #include "JNIHelp.h" 16 #include "GraphicsJNI.h" 17 18 #include <android_runtime/AndroidRuntime.h> 19 #include <androidfw/Asset.h> 20 #include <androidfw/ResourceTypes.h> 21 #include <cutils/compiler.h> 22 #include <netinet/in.h> 23 #include <stdio.h> 24 #include <sys/mman.h> 25 #include <sys/stat.h> 26 27 jfieldID gOptions_justBoundsFieldID; 28 jfieldID gOptions_sampleSizeFieldID; 29 jfieldID gOptions_configFieldID; 30 jfieldID gOptions_premultipliedFieldID; 31 jfieldID gOptions_mutableFieldID; 32 jfieldID gOptions_ditherFieldID; 33 jfieldID gOptions_preferQualityOverSpeedFieldID; 34 jfieldID gOptions_scaledFieldID; 35 jfieldID gOptions_densityFieldID; 36 jfieldID gOptions_screenDensityFieldID; 37 jfieldID gOptions_targetDensityFieldID; 38 jfieldID gOptions_widthFieldID; 39 jfieldID gOptions_heightFieldID; 40 jfieldID gOptions_mimeFieldID; 41 jfieldID gOptions_mCancelID; 42 jfieldID gOptions_bitmapFieldID; 43 44 jfieldID gBitmap_nativeBitmapFieldID; 45 jfieldID gBitmap_ninePatchInsetsFieldID; 46 47 jclass gInsetStruct_class; 48 jmethodID gInsetStruct_constructorMethodID; 49 50 using namespace android; 51 52 static inline int32_t validOrNeg1(bool isValid, int32_t value) { 53 // return isValid ? value : -1; 54 SkASSERT((int)isValid == 0 || (int)isValid == 1); 55 return ((int32_t)isValid - 1) | value; 56 } 57 58 jstring getMimeTypeString(JNIEnv* env, SkImageDecoder::Format format) { 59 static const struct { 60 SkImageDecoder::Format fFormat; 61 const char* fMimeType; 62 } gMimeTypes[] = { 63 { SkImageDecoder::kBMP_Format, "image/bmp" }, 64 { SkImageDecoder::kGIF_Format, "image/gif" }, 65 { SkImageDecoder::kICO_Format, "image/x-ico" }, 66 { SkImageDecoder::kJPEG_Format, "image/jpeg" }, 67 { SkImageDecoder::kPNG_Format, "image/png" }, 68 { SkImageDecoder::kWEBP_Format, "image/webp" }, 69 { SkImageDecoder::kWBMP_Format, "image/vnd.wap.wbmp" } 70 }; 71 72 const char* cstr = NULL; 73 for (size_t i = 0; i < SK_ARRAY_COUNT(gMimeTypes); i++) { 74 if (gMimeTypes[i].fFormat == format) { 75 cstr = gMimeTypes[i].fMimeType; 76 break; 77 } 78 } 79 80 jstring jstr = NULL; 81 if (cstr != NULL) { 82 // NOTE: Caller should env->ExceptionCheck() for OOM 83 // (can't check for NULL as it's a valid return value) 84 jstr = env->NewStringUTF(cstr); 85 } 86 return jstr; 87 } 88 89 static bool optionsJustBounds(JNIEnv* env, jobject options) { 90 return options != NULL && env->GetBooleanField(options, gOptions_justBoundsFieldID); 91 } 92 93 static void scaleDivRange(int32_t* divs, int count, float scale, int maxValue) { 94 for (int i = 0; i < count; i++) { 95 divs[i] = int32_t(divs[i] * scale + 0.5f); 96 if (i > 0 && divs[i] == divs[i - 1]) { 97 divs[i]++; // avoid collisions 98 } 99 } 100 101 if (CC_UNLIKELY(divs[count - 1] > maxValue)) { 102 // if the collision avoidance above put some divs outside the bounds of the bitmap, 103 // slide outer stretchable divs inward to stay within bounds 104 int highestAvailable = maxValue; 105 for (int i = count - 1; i >= 0; i--) { 106 divs[i] = highestAvailable; 107 if (i > 0 && divs[i] <= divs[i-1]){ 108 // keep shifting 109 highestAvailable = divs[i] - 1; 110 } else { 111 break; 112 } 113 } 114 } 115 } 116 117 static void scaleNinePatchChunk(android::Res_png_9patch* chunk, float scale, 118 int scaledWidth, int scaledHeight) { 119 chunk->paddingLeft = int(chunk->paddingLeft * scale + 0.5f); 120 chunk->paddingTop = int(chunk->paddingTop * scale + 0.5f); 121 chunk->paddingRight = int(chunk->paddingRight * scale + 0.5f); 122 chunk->paddingBottom = int(chunk->paddingBottom * scale + 0.5f); 123 124 scaleDivRange(chunk->getXDivs(), chunk->numXDivs, scale, scaledWidth); 125 scaleDivRange(chunk->getYDivs(), chunk->numYDivs, scale, scaledHeight); 126 } 127 128 static SkColorType colorTypeForScaledOutput(SkColorType colorType) { 129 switch (colorType) { 130 case kUnknown_SkColorType: 131 case kIndex_8_SkColorType: 132 return kN32_SkColorType; 133 default: 134 break; 135 } 136 return colorType; 137 } 138 139 class ScaleCheckingAllocator : public SkBitmap::HeapAllocator { 140 public: 141 ScaleCheckingAllocator(float scale, int size) 142 : mScale(scale), mSize(size) { 143 } 144 145 virtual bool allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) { 146 // accounts for scale in final allocation, using eventual size and config 147 const int bytesPerPixel = SkColorTypeBytesPerPixel( 148 colorTypeForScaledOutput(bitmap->colorType())); 149 const int requestedSize = bytesPerPixel * 150 int(bitmap->width() * mScale + 0.5f) * 151 int(bitmap->height() * mScale + 0.5f); 152 if (requestedSize > mSize) { 153 ALOGW("bitmap for alloc reuse (%d bytes) can't fit scaled bitmap (%d bytes)", 154 mSize, requestedSize); 155 return false; 156 } 157 return SkBitmap::HeapAllocator::allocPixelRef(bitmap, ctable); 158 } 159 private: 160 const float mScale; 161 const int mSize; 162 }; 163 164 class RecyclingPixelAllocator : public SkBitmap::Allocator { 165 public: 166 RecyclingPixelAllocator(SkPixelRef* pixelRef, unsigned int size) 167 : mPixelRef(pixelRef), mSize(size) { 168 SkSafeRef(mPixelRef); 169 } 170 171 ~RecyclingPixelAllocator() { 172 SkSafeUnref(mPixelRef); 173 } 174 175 virtual bool allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) { 176 const SkImageInfo& info = bitmap->info(); 177 if (info.fColorType == kUnknown_SkColorType) { 178 ALOGW("unable to reuse a bitmap as the target has an unknown bitmap configuration"); 179 return false; 180 } 181 182 const int64_t size64 = info.getSafeSize64(bitmap->rowBytes()); 183 if (!sk_64_isS32(size64)) { 184 ALOGW("bitmap is too large"); 185 return false; 186 } 187 188 const size_t size = sk_64_asS32(size64); 189 if (size > mSize) { 190 ALOGW("bitmap marked for reuse (%d bytes) can't fit new bitmap (%d bytes)", 191 mSize, size); 192 return false; 193 } 194 195 // Create a new pixelref with the new ctable that wraps the previous pixelref 196 SkPixelRef* pr = new AndroidPixelRef(*static_cast<AndroidPixelRef*>(mPixelRef), 197 info, bitmap->rowBytes(), ctable); 198 199 bitmap->setPixelRef(pr)->unref(); 200 // since we're already allocated, we lockPixels right away 201 // HeapAllocator/JavaPixelAllocator behaves this way too 202 bitmap->lockPixels(); 203 return true; 204 } 205 206 private: 207 SkPixelRef* const mPixelRef; 208 const unsigned int mSize; 209 }; 210 211 static jobject doDecode(JNIEnv* env, SkStreamRewindable* stream, jobject padding, jobject options) { 212 213 int sampleSize = 1; 214 215 SkImageDecoder::Mode decodeMode = SkImageDecoder::kDecodePixels_Mode; 216 SkColorType prefColorType = kN32_SkColorType; 217 218 bool doDither = true; 219 bool isMutable = false; 220 float scale = 1.0f; 221 bool preferQualityOverSpeed = false; 222 bool requireUnpremultiplied = false; 223 224 jobject javaBitmap = NULL; 225 226 if (options != NULL) { 227 sampleSize = env->GetIntField(options, gOptions_sampleSizeFieldID); 228 if (optionsJustBounds(env, options)) { 229 decodeMode = SkImageDecoder::kDecodeBounds_Mode; 230 } 231 232 // initialize these, in case we fail later on 233 env->SetIntField(options, gOptions_widthFieldID, -1); 234 env->SetIntField(options, gOptions_heightFieldID, -1); 235 env->SetObjectField(options, gOptions_mimeFieldID, 0); 236 237 jobject jconfig = env->GetObjectField(options, gOptions_configFieldID); 238 prefColorType = GraphicsJNI::getNativeBitmapColorType(env, jconfig); 239 isMutable = env->GetBooleanField(options, gOptions_mutableFieldID); 240 doDither = env->GetBooleanField(options, gOptions_ditherFieldID); 241 preferQualityOverSpeed = env->GetBooleanField(options, 242 gOptions_preferQualityOverSpeedFieldID); 243 requireUnpremultiplied = !env->GetBooleanField(options, gOptions_premultipliedFieldID); 244 javaBitmap = env->GetObjectField(options, gOptions_bitmapFieldID); 245 246 if (env->GetBooleanField(options, gOptions_scaledFieldID)) { 247 const int density = env->GetIntField(options, gOptions_densityFieldID); 248 const int targetDensity = env->GetIntField(options, gOptions_targetDensityFieldID); 249 const int screenDensity = env->GetIntField(options, gOptions_screenDensityFieldID); 250 if (density != 0 && targetDensity != 0 && density != screenDensity) { 251 scale = (float) targetDensity / density; 252 } 253 } 254 } 255 256 const bool willScale = scale != 1.0f; 257 258 SkImageDecoder* decoder = SkImageDecoder::Factory(stream); 259 if (decoder == NULL) { 260 return nullObjectReturn("SkImageDecoder::Factory returned null"); 261 } 262 263 decoder->setSampleSize(sampleSize); 264 decoder->setDitherImage(doDither); 265 decoder->setPreferQualityOverSpeed(preferQualityOverSpeed); 266 decoder->setRequireUnpremultipliedColors(requireUnpremultiplied); 267 268 SkBitmap* outputBitmap = NULL; 269 unsigned int existingBufferSize = 0; 270 if (javaBitmap != NULL) { 271 outputBitmap = (SkBitmap*) env->GetLongField(javaBitmap, gBitmap_nativeBitmapFieldID); 272 if (outputBitmap->isImmutable()) { 273 ALOGW("Unable to reuse an immutable bitmap as an image decoder target."); 274 javaBitmap = NULL; 275 outputBitmap = NULL; 276 } else { 277 existingBufferSize = GraphicsJNI::getBitmapAllocationByteCount(env, javaBitmap); 278 } 279 } 280 281 SkAutoTDelete<SkBitmap> adb(outputBitmap == NULL ? new SkBitmap : NULL); 282 if (outputBitmap == NULL) outputBitmap = adb.get(); 283 284 NinePatchPeeker peeker(decoder); 285 decoder->setPeeker(&peeker); 286 287 JavaPixelAllocator javaAllocator(env); 288 RecyclingPixelAllocator recyclingAllocator(outputBitmap->pixelRef(), existingBufferSize); 289 ScaleCheckingAllocator scaleCheckingAllocator(scale, existingBufferSize); 290 SkBitmap::Allocator* outputAllocator = (javaBitmap != NULL) ? 291 (SkBitmap::Allocator*)&recyclingAllocator : (SkBitmap::Allocator*)&javaAllocator; 292 if (decodeMode != SkImageDecoder::kDecodeBounds_Mode) { 293 if (!willScale) { 294 // If the java allocator is being used to allocate the pixel memory, the decoder 295 // need not write zeroes, since the memory is initialized to 0. 296 decoder->setSkipWritingZeroes(outputAllocator == &javaAllocator); 297 decoder->setAllocator(outputAllocator); 298 } else if (javaBitmap != NULL) { 299 // check for eventual scaled bounds at allocation time, so we don't decode the bitmap 300 // only to find the scaled result too large to fit in the allocation 301 decoder->setAllocator(&scaleCheckingAllocator); 302 } 303 } 304 305 // Only setup the decoder to be deleted after its stack-based, refcounted 306 // components (allocators, peekers, etc) are declared. This prevents RefCnt 307 // asserts from firing due to the order objects are deleted from the stack. 308 SkAutoTDelete<SkImageDecoder> add(decoder); 309 310 AutoDecoderCancel adc(options, decoder); 311 312 // To fix the race condition in case "requestCancelDecode" 313 // happens earlier than AutoDecoderCancel object is added 314 // to the gAutoDecoderCancelMutex linked list. 315 if (options != NULL && env->GetBooleanField(options, gOptions_mCancelID)) { 316 return nullObjectReturn("gOptions_mCancelID"); 317 } 318 319 SkBitmap decodingBitmap; 320 if (decoder->decode(stream, &decodingBitmap, prefColorType, decodeMode) 321 != SkImageDecoder::kSuccess) { 322 return nullObjectReturn("decoder->decode returned false"); 323 } 324 325 int scaledWidth = decodingBitmap.width(); 326 int scaledHeight = decodingBitmap.height(); 327 328 if (willScale && decodeMode != SkImageDecoder::kDecodeBounds_Mode) { 329 scaledWidth = int(scaledWidth * scale + 0.5f); 330 scaledHeight = int(scaledHeight * scale + 0.5f); 331 } 332 333 // update options (if any) 334 if (options != NULL) { 335 jstring mimeType = getMimeTypeString(env, decoder->getFormat()); 336 if (env->ExceptionCheck()) { 337 return nullObjectReturn("OOM in getMimeTypeString()"); 338 } 339 env->SetIntField(options, gOptions_widthFieldID, scaledWidth); 340 env->SetIntField(options, gOptions_heightFieldID, scaledHeight); 341 env->SetObjectField(options, gOptions_mimeFieldID, mimeType); 342 } 343 344 // if we're in justBounds mode, return now (skip the java bitmap) 345 if (decodeMode == SkImageDecoder::kDecodeBounds_Mode) { 346 return NULL; 347 } 348 349 jbyteArray ninePatchChunk = NULL; 350 if (peeker.mPatch != NULL) { 351 if (willScale) { 352 scaleNinePatchChunk(peeker.mPatch, scale, scaledWidth, scaledHeight); 353 } 354 355 size_t ninePatchArraySize = peeker.mPatch->serializedSize(); 356 ninePatchChunk = env->NewByteArray(ninePatchArraySize); 357 if (ninePatchChunk == NULL) { 358 return nullObjectReturn("ninePatchChunk == null"); 359 } 360 361 jbyte* array = (jbyte*) env->GetPrimitiveArrayCritical(ninePatchChunk, NULL); 362 if (array == NULL) { 363 return nullObjectReturn("primitive array == null"); 364 } 365 366 memcpy(array, peeker.mPatch, peeker.mPatchSize); 367 env->ReleasePrimitiveArrayCritical(ninePatchChunk, array, 0); 368 } 369 370 jobject ninePatchInsets = NULL; 371 if (peeker.mHasInsets) { 372 ninePatchInsets = env->NewObject(gInsetStruct_class, gInsetStruct_constructorMethodID, 373 peeker.mOpticalInsets[0], peeker.mOpticalInsets[1], peeker.mOpticalInsets[2], peeker.mOpticalInsets[3], 374 peeker.mOutlineInsets[0], peeker.mOutlineInsets[1], peeker.mOutlineInsets[2], peeker.mOutlineInsets[3], 375 peeker.mOutlineRadius, peeker.mOutlineAlpha, scale); 376 if (ninePatchInsets == NULL) { 377 return nullObjectReturn("nine patch insets == null"); 378 } 379 if (javaBitmap != NULL) { 380 env->SetObjectField(javaBitmap, gBitmap_ninePatchInsetsFieldID, ninePatchInsets); 381 } 382 } 383 384 if (willScale) { 385 // This is weird so let me explain: we could use the scale parameter 386 // directly, but for historical reasons this is how the corresponding 387 // Dalvik code has always behaved. We simply recreate the behavior here. 388 // The result is slightly different from simply using scale because of 389 // the 0.5f rounding bias applied when computing the target image size 390 const float sx = scaledWidth / float(decodingBitmap.width()); 391 const float sy = scaledHeight / float(decodingBitmap.height()); 392 393 // TODO: avoid copying when scaled size equals decodingBitmap size 394 SkColorType colorType = colorTypeForScaledOutput(decodingBitmap.colorType()); 395 // FIXME: If the alphaType is kUnpremul and the image has alpha, the 396 // colors may not be correct, since Skia does not yet support drawing 397 // to/from unpremultiplied bitmaps. 398 outputBitmap->setInfo(SkImageInfo::Make(scaledWidth, scaledHeight, 399 colorType, decodingBitmap.alphaType())); 400 if (!outputBitmap->allocPixels(outputAllocator, NULL)) { 401 return nullObjectReturn("allocation failed for scaled bitmap"); 402 } 403 404 // If outputBitmap's pixels are newly allocated by Java, there is no need 405 // to erase to 0, since the pixels were initialized to 0. 406 if (outputAllocator != &javaAllocator) { 407 outputBitmap->eraseColor(0); 408 } 409 410 SkPaint paint; 411 paint.setFilterLevel(SkPaint::kLow_FilterLevel); 412 413 SkCanvas canvas(*outputBitmap); 414 canvas.scale(sx, sy); 415 canvas.drawBitmap(decodingBitmap, 0.0f, 0.0f, &paint); 416 } else { 417 outputBitmap->swap(decodingBitmap); 418 } 419 420 if (padding) { 421 if (peeker.mPatch != NULL) { 422 GraphicsJNI::set_jrect(env, padding, 423 peeker.mPatch->paddingLeft, peeker.mPatch->paddingTop, 424 peeker.mPatch->paddingRight, peeker.mPatch->paddingBottom); 425 } else { 426 GraphicsJNI::set_jrect(env, padding, -1, -1, -1, -1); 427 } 428 } 429 430 // if we get here, we're in kDecodePixels_Mode and will therefore 431 // already have a pixelref installed. 432 if (outputBitmap->pixelRef() == NULL) { 433 return nullObjectReturn("Got null SkPixelRef"); 434 } 435 436 if (!isMutable && javaBitmap == NULL) { 437 // promise we will never change our pixels (great for sharing and pictures) 438 outputBitmap->setImmutable(); 439 } 440 441 // detach bitmap from its autodeleter, since we want to own it now 442 adb.detach(); 443 444 if (javaBitmap != NULL) { 445 bool isPremultiplied = !requireUnpremultiplied; 446 GraphicsJNI::reinitBitmap(env, javaBitmap, outputBitmap, isPremultiplied); 447 outputBitmap->notifyPixelsChanged(); 448 // If a java bitmap was passed in for reuse, pass it back 449 return javaBitmap; 450 } 451 452 int bitmapCreateFlags = 0x0; 453 if (isMutable) bitmapCreateFlags |= GraphicsJNI::kBitmapCreateFlag_Mutable; 454 if (!requireUnpremultiplied) bitmapCreateFlags |= GraphicsJNI::kBitmapCreateFlag_Premultiplied; 455 456 // now create the java bitmap 457 return GraphicsJNI::createBitmap(env, outputBitmap, javaAllocator.getStorageObj(), 458 bitmapCreateFlags, ninePatchChunk, ninePatchInsets, -1); 459 } 460 461 // Need to buffer enough input to be able to rewind as much as might be read by a decoder 462 // trying to determine the stream's format. Currently the most is 64, read by 463 // SkImageDecoder_libwebp. 464 // FIXME: Get this number from SkImageDecoder 465 #define BYTES_TO_BUFFER 64 466 467 static jobject nativeDecodeStream(JNIEnv* env, jobject clazz, jobject is, jbyteArray storage, 468 jobject padding, jobject options) { 469 470 jobject bitmap = NULL; 471 SkAutoTUnref<SkStream> stream(CreateJavaInputStreamAdaptor(env, is, storage)); 472 473 if (stream.get()) { 474 SkAutoTUnref<SkStreamRewindable> bufferedStream( 475 SkFrontBufferedStream::Create(stream, BYTES_TO_BUFFER)); 476 SkASSERT(bufferedStream.get() != NULL); 477 bitmap = doDecode(env, bufferedStream, padding, options); 478 } 479 return bitmap; 480 } 481 482 static jobject nativeDecodeFileDescriptor(JNIEnv* env, jobject clazz, jobject fileDescriptor, 483 jobject padding, jobject bitmapFactoryOptions) { 484 485 NPE_CHECK_RETURN_ZERO(env, fileDescriptor); 486 487 int descriptor = jniGetFDFromFileDescriptor(env, fileDescriptor); 488 489 struct stat fdStat; 490 if (fstat(descriptor, &fdStat) == -1) { 491 doThrowIOE(env, "broken file descriptor"); 492 return nullObjectReturn("fstat return -1"); 493 } 494 495 // Restore the descriptor's offset on exiting this function. Even though 496 // we dup the descriptor, both the original and dup refer to the same open 497 // file description and changes to the file offset in one impact the other. 498 AutoFDSeek autoRestore(descriptor); 499 500 // Duplicate the descriptor here to prevent leaking memory. A leak occurs 501 // if we only close the file descriptor and not the file object it is used to 502 // create. If we don't explicitly clean up the file (which in turn closes the 503 // descriptor) the buffers allocated internally by fseek will be leaked. 504 int dupDescriptor = dup(descriptor); 505 506 FILE* file = fdopen(dupDescriptor, "r"); 507 if (file == NULL) { 508 // cleanup the duplicated descriptor since it will not be closed when the 509 // file is cleaned up (fclose). 510 close(dupDescriptor); 511 return nullObjectReturn("Could not open file"); 512 } 513 514 SkAutoTUnref<SkFILEStream> fileStream(new SkFILEStream(file, 515 SkFILEStream::kCallerPasses_Ownership)); 516 517 // Use a buffered stream. Although an SkFILEStream can be rewound, this 518 // ensures that SkImageDecoder::Factory never rewinds beyond the 519 // current position of the file descriptor. 520 SkAutoTUnref<SkStreamRewindable> stream(SkFrontBufferedStream::Create(fileStream, 521 BYTES_TO_BUFFER)); 522 523 return doDecode(env, stream, padding, bitmapFactoryOptions); 524 } 525 526 static jobject nativeDecodeAsset(JNIEnv* env, jobject clazz, jlong native_asset, 527 jobject padding, jobject options) { 528 529 Asset* asset = reinterpret_cast<Asset*>(native_asset); 530 // since we know we'll be done with the asset when we return, we can 531 // just use a simple wrapper 532 SkAutoTUnref<SkStreamRewindable> stream(new AssetStreamAdaptor(asset, 533 AssetStreamAdaptor::kNo_OwnAsset, AssetStreamAdaptor::kNo_HasMemoryBase)); 534 return doDecode(env, stream, padding, options); 535 } 536 537 static jobject nativeDecodeByteArray(JNIEnv* env, jobject, jbyteArray byteArray, 538 jint offset, jint length, jobject options) { 539 540 AutoJavaByteArray ar(env, byteArray); 541 SkMemoryStream* stream = new SkMemoryStream(ar.ptr() + offset, length, false); 542 SkAutoUnref aur(stream); 543 return doDecode(env, stream, NULL, options); 544 } 545 546 static void nativeRequestCancel(JNIEnv*, jobject joptions) { 547 (void)AutoDecoderCancel::RequestCancel(joptions); 548 } 549 550 static jboolean nativeIsSeekable(JNIEnv* env, jobject, jobject fileDescriptor) { 551 jint descriptor = jniGetFDFromFileDescriptor(env, fileDescriptor); 552 return ::lseek64(descriptor, 0, SEEK_CUR) != -1 ? JNI_TRUE : JNI_FALSE; 553 } 554 555 /////////////////////////////////////////////////////////////////////////////// 556 557 static JNINativeMethod gMethods[] = { 558 { "nativeDecodeStream", 559 "(Ljava/io/InputStream;[BLandroid/graphics/Rect;Landroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;", 560 (void*)nativeDecodeStream 561 }, 562 563 { "nativeDecodeFileDescriptor", 564 "(Ljava/io/FileDescriptor;Landroid/graphics/Rect;Landroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;", 565 (void*)nativeDecodeFileDescriptor 566 }, 567 568 { "nativeDecodeAsset", 569 "(JLandroid/graphics/Rect;Landroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;", 570 (void*)nativeDecodeAsset 571 }, 572 573 { "nativeDecodeByteArray", 574 "([BIILandroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;", 575 (void*)nativeDecodeByteArray 576 }, 577 578 { "nativeIsSeekable", 579 "(Ljava/io/FileDescriptor;)Z", 580 (void*)nativeIsSeekable 581 }, 582 }; 583 584 static JNINativeMethod gOptionsMethods[] = { 585 { "requestCancel", "()V", (void*)nativeRequestCancel } 586 }; 587 588 static jfieldID getFieldIDCheck(JNIEnv* env, jclass clazz, 589 const char fieldname[], const char type[]) { 590 jfieldID id = env->GetFieldID(clazz, fieldname, type); 591 SkASSERT(id); 592 return id; 593 } 594 595 int register_android_graphics_BitmapFactory(JNIEnv* env) { 596 jclass options_class = env->FindClass("android/graphics/BitmapFactory$Options"); 597 SkASSERT(options_class); 598 gOptions_bitmapFieldID = getFieldIDCheck(env, options_class, "inBitmap", 599 "Landroid/graphics/Bitmap;"); 600 gOptions_justBoundsFieldID = getFieldIDCheck(env, options_class, "inJustDecodeBounds", "Z"); 601 gOptions_sampleSizeFieldID = getFieldIDCheck(env, options_class, "inSampleSize", "I"); 602 gOptions_configFieldID = getFieldIDCheck(env, options_class, "inPreferredConfig", 603 "Landroid/graphics/Bitmap$Config;"); 604 gOptions_premultipliedFieldID = getFieldIDCheck(env, options_class, "inPremultiplied", "Z"); 605 gOptions_mutableFieldID = getFieldIDCheck(env, options_class, "inMutable", "Z"); 606 gOptions_ditherFieldID = getFieldIDCheck(env, options_class, "inDither", "Z"); 607 gOptions_preferQualityOverSpeedFieldID = getFieldIDCheck(env, options_class, 608 "inPreferQualityOverSpeed", "Z"); 609 gOptions_scaledFieldID = getFieldIDCheck(env, options_class, "inScaled", "Z"); 610 gOptions_densityFieldID = getFieldIDCheck(env, options_class, "inDensity", "I"); 611 gOptions_screenDensityFieldID = getFieldIDCheck(env, options_class, "inScreenDensity", "I"); 612 gOptions_targetDensityFieldID = getFieldIDCheck(env, options_class, "inTargetDensity", "I"); 613 gOptions_widthFieldID = getFieldIDCheck(env, options_class, "outWidth", "I"); 614 gOptions_heightFieldID = getFieldIDCheck(env, options_class, "outHeight", "I"); 615 gOptions_mimeFieldID = getFieldIDCheck(env, options_class, "outMimeType", "Ljava/lang/String;"); 616 gOptions_mCancelID = getFieldIDCheck(env, options_class, "mCancel", "Z"); 617 618 jclass bitmap_class = env->FindClass("android/graphics/Bitmap"); 619 SkASSERT(bitmap_class); 620 gBitmap_nativeBitmapFieldID = getFieldIDCheck(env, bitmap_class, "mNativeBitmap", "J"); 621 gBitmap_ninePatchInsetsFieldID = getFieldIDCheck(env, bitmap_class, "mNinePatchInsets", 622 "Landroid/graphics/NinePatch$InsetStruct;"); 623 624 gInsetStruct_class = (jclass) env->NewGlobalRef(env->FindClass("android/graphics/NinePatch$InsetStruct")); 625 gInsetStruct_constructorMethodID = env->GetMethodID(gInsetStruct_class, "<init>", "(IIIIIIIIFIF)V"); 626 627 int ret = AndroidRuntime::registerNativeMethods(env, 628 "android/graphics/BitmapFactory$Options", 629 gOptionsMethods, 630 SK_ARRAY_COUNT(gOptionsMethods)); 631 if (ret) { 632 return ret; 633 } 634 return android::AndroidRuntime::registerNativeMethods(env, "android/graphics/BitmapFactory", 635 gMethods, SK_ARRAY_COUNT(gMethods)); 636 } 637