BitmapFactory.cpp revision 02eb6bfd66d0afc4b1d81824558e136649a5a4df
1#define LOG_TAG "BitmapFactory" 2 3#include "BitmapFactory.h" 4#include "NinePatchPeeker.h" 5#include "SkData.h" 6#include "SkFrontBufferedStream.h" 7#include "SkImageDecoder.h" 8#include "SkImageRef_ashmem.h" 9#include "SkImageRef_GlobalPool.h" 10#include "SkPixelRef.h" 11#include "SkStream.h" 12#include "SkTemplates.h" 13#include "SkUtils.h" 14#include "CreateJavaOutputStreamAdaptor.h" 15#include "AutoDecodeCancel.h" 16#include "Utils.h" 17#include "JNIHelp.h" 18#include "GraphicsJNI.h" 19 20#include <android_runtime/AndroidRuntime.h> 21#include <androidfw/Asset.h> 22#include <androidfw/ResourceTypes.h> 23#include <netinet/in.h> 24#include <sys/mman.h> 25#include <sys/stat.h> 26 27jfieldID gOptions_justBoundsFieldID; 28jfieldID gOptions_sampleSizeFieldID; 29jfieldID gOptions_configFieldID; 30jfieldID gOptions_premultipliedFieldID; 31jfieldID gOptions_mutableFieldID; 32jfieldID gOptions_ditherFieldID; 33jfieldID gOptions_purgeableFieldID; 34jfieldID gOptions_shareableFieldID; 35jfieldID gOptions_preferQualityOverSpeedFieldID; 36jfieldID gOptions_scaledFieldID; 37jfieldID gOptions_densityFieldID; 38jfieldID gOptions_screenDensityFieldID; 39jfieldID gOptions_targetDensityFieldID; 40jfieldID gOptions_widthFieldID; 41jfieldID gOptions_heightFieldID; 42jfieldID gOptions_mimeFieldID; 43jfieldID gOptions_mCancelID; 44jfieldID gOptions_bitmapFieldID; 45jfieldID gBitmap_nativeBitmapFieldID; 46jfieldID gBitmap_layoutBoundsFieldID; 47 48#if 0 49 #define TRACE_BITMAP(code) code 50#else 51 #define TRACE_BITMAP(code) 52#endif 53 54using namespace android; 55 56static inline int32_t validOrNeg1(bool isValid, int32_t value) { 57// return isValid ? value : -1; 58 SkASSERT((int)isValid == 0 || (int)isValid == 1); 59 return ((int32_t)isValid - 1) | value; 60} 61 62jstring getMimeTypeString(JNIEnv* env, SkImageDecoder::Format format) { 63 static const struct { 64 SkImageDecoder::Format fFormat; 65 const char* fMimeType; 66 } gMimeTypes[] = { 67 { SkImageDecoder::kBMP_Format, "image/bmp" }, 68 { SkImageDecoder::kGIF_Format, "image/gif" }, 69 { SkImageDecoder::kICO_Format, "image/x-ico" }, 70 { SkImageDecoder::kJPEG_Format, "image/jpeg" }, 71 { SkImageDecoder::kPNG_Format, "image/png" }, 72 { SkImageDecoder::kWEBP_Format, "image/webp" }, 73 { SkImageDecoder::kWBMP_Format, "image/vnd.wap.wbmp" } 74 }; 75 76 const char* cstr = NULL; 77 for (size_t i = 0; i < SK_ARRAY_COUNT(gMimeTypes); i++) { 78 if (gMimeTypes[i].fFormat == format) { 79 cstr = gMimeTypes[i].fMimeType; 80 break; 81 } 82 } 83 84 jstring jstr = 0; 85 if (NULL != cstr) { 86 jstr = env->NewStringUTF(cstr); 87 } 88 return jstr; 89} 90 91static bool optionsPurgeable(JNIEnv* env, jobject options) { 92 return options != NULL && env->GetBooleanField(options, gOptions_purgeableFieldID); 93} 94 95static bool optionsShareable(JNIEnv* env, jobject options) { 96 return options != NULL && env->GetBooleanField(options, gOptions_shareableFieldID); 97} 98 99static bool optionsJustBounds(JNIEnv* env, jobject options) { 100 return options != NULL && env->GetBooleanField(options, gOptions_justBoundsFieldID); 101} 102 103static void scaleNinePatchChunk(android::Res_png_9patch* chunk, float scale) { 104 chunk->paddingLeft = int(chunk->paddingLeft * scale + 0.5f); 105 chunk->paddingTop = int(chunk->paddingTop * scale + 0.5f); 106 chunk->paddingRight = int(chunk->paddingRight * scale + 0.5f); 107 chunk->paddingBottom = int(chunk->paddingBottom * scale + 0.5f); 108 109 int32_t* xDivs = chunk->getXDivs(); 110 for (int i = 0; i < chunk->numXDivs; i++) { 111 xDivs[i] = int32_t(xDivs[i] * scale + 0.5f); 112 if (i > 0 && xDivs[i] == xDivs[i - 1]) { 113 xDivs[i]++; 114 } 115 } 116 117 int32_t* yDivs = chunk->getYDivs(); 118 for (int i = 0; i < chunk->numYDivs; i++) { 119 yDivs[i] = int32_t(yDivs[i] * scale + 0.5f); 120 if (i > 0 && yDivs[i] == yDivs[i - 1]) { 121 yDivs[i]++; 122 } 123 } 124} 125 126static SkPixelRef* installPixelRef(SkBitmap* bitmap, SkStreamRewindable* stream, 127 int sampleSize, bool ditherImage) { 128 129 SkImageRef* pr; 130 // only use ashmem for large images, since mmaps come at a price 131 if (bitmap->getSize() >= 32 * 1024) { 132 pr = new SkImageRef_ashmem(stream, bitmap->config(), sampleSize); 133 } else { 134 pr = new SkImageRef_GlobalPool(stream, bitmap->config(), sampleSize); 135 } 136 pr->setDitherImage(ditherImage); 137 bitmap->setPixelRef(pr)->unref(); 138 pr->isOpaque(bitmap); 139 return pr; 140} 141 142static SkBitmap::Config configForScaledOutput(SkBitmap::Config config) { 143 switch (config) { 144 case SkBitmap::kNo_Config: 145 case SkBitmap::kIndex8_Config: 146 return SkBitmap::kARGB_8888_Config; 147 default: 148 break; 149 } 150 return config; 151} 152 153class ScaleCheckingAllocator : public SkBitmap::HeapAllocator { 154public: 155 ScaleCheckingAllocator(float scale, int size) 156 : mScale(scale), mSize(size) { 157 } 158 159 virtual bool allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) { 160 // accounts for scale in final allocation, using eventual size and config 161 const int bytesPerPixel = SkBitmap::ComputeBytesPerPixel( 162 configForScaledOutput(bitmap->getConfig())); 163 const int requestedSize = bytesPerPixel * 164 int(bitmap->width() * mScale + 0.5f) * 165 int(bitmap->height() * mScale + 0.5f); 166 if (requestedSize > mSize) { 167 ALOGW("bitmap for alloc reuse (%d bytes) can't fit scaled bitmap (%d bytes)", 168 mSize, requestedSize); 169 return false; 170 } 171 return SkBitmap::HeapAllocator::allocPixelRef(bitmap, ctable); 172 } 173private: 174 const float mScale; 175 const int mSize; 176}; 177 178class RecyclingPixelAllocator : public SkBitmap::Allocator { 179public: 180 RecyclingPixelAllocator(SkPixelRef* pixelRef, unsigned int size) 181 : mPixelRef(pixelRef), mSize(size) { 182 SkSafeRef(mPixelRef); 183 } 184 185 ~RecyclingPixelAllocator() { 186 SkSafeUnref(mPixelRef); 187 } 188 189 virtual bool allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) { 190 if (!bitmap->getSize64().is32() || bitmap->getSize() > mSize) { 191 ALOGW("bitmap marked for reuse (%d bytes) can't fit new bitmap (%d bytes)", 192 mSize, bitmap->getSize()); 193 return false; 194 } 195 196 // Create a new pixelref with the new ctable that wraps the previous pixelref 197 SkPixelRef* pr = new AndroidPixelRef(*static_cast<AndroidPixelRef*>(mPixelRef), 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 206private: 207 SkPixelRef* const mPixelRef; 208 const unsigned int mSize; 209}; 210 211// since we "may" create a purgeable imageref, we require the stream be ref'able 212// i.e. dynamically allocated, since its lifetime may exceed the current stack 213// frame. 214static jobject doDecode(JNIEnv* env, SkStreamRewindable* stream, jobject padding, 215 jobject options, bool allowPurgeable, bool forcePurgeable = false) { 216 217 int sampleSize = 1; 218 219 SkImageDecoder::Mode mode = SkImageDecoder::kDecodePixels_Mode; 220 SkBitmap::Config prefConfig = SkBitmap::kARGB_8888_Config; 221 222 bool doDither = true; 223 bool isMutable = false; 224 float scale = 1.0f; 225 bool isPurgeable = forcePurgeable || (allowPurgeable && optionsPurgeable(env, options)); 226 bool preferQualityOverSpeed = false; 227 bool requireUnpremultiplied = false; 228 229 jobject javaBitmap = NULL; 230 231 if (options != NULL) { 232 sampleSize = env->GetIntField(options, gOptions_sampleSizeFieldID); 233 if (optionsJustBounds(env, options)) { 234 mode = SkImageDecoder::kDecodeBounds_Mode; 235 } 236 237 // initialize these, in case we fail later on 238 env->SetIntField(options, gOptions_widthFieldID, -1); 239 env->SetIntField(options, gOptions_heightFieldID, -1); 240 env->SetObjectField(options, gOptions_mimeFieldID, 0); 241 242 jobject jconfig = env->GetObjectField(options, gOptions_configFieldID); 243 prefConfig = GraphicsJNI::getNativeBitmapConfig(env, jconfig); 244 isMutable = env->GetBooleanField(options, gOptions_mutableFieldID); 245 doDither = env->GetBooleanField(options, gOptions_ditherFieldID); 246 preferQualityOverSpeed = env->GetBooleanField(options, 247 gOptions_preferQualityOverSpeedFieldID); 248 requireUnpremultiplied = !env->GetBooleanField(options, gOptions_premultipliedFieldID); 249 javaBitmap = env->GetObjectField(options, gOptions_bitmapFieldID); 250 251 if (env->GetBooleanField(options, gOptions_scaledFieldID)) { 252 const int density = env->GetIntField(options, gOptions_densityFieldID); 253 const int targetDensity = env->GetIntField(options, gOptions_targetDensityFieldID); 254 const int screenDensity = env->GetIntField(options, gOptions_screenDensityFieldID); 255 if (density != 0 && targetDensity != 0 && density != screenDensity) { 256 scale = (float) targetDensity / density; 257 } 258 } 259 } 260 261 const bool willScale = scale != 1.0f; 262 isPurgeable &= !willScale; 263 264 SkImageDecoder* decoder = SkImageDecoder::Factory(stream); 265 if (decoder == NULL) { 266 return nullObjectReturn("SkImageDecoder::Factory returned null"); 267 } 268 269 decoder->setSampleSize(sampleSize); 270 decoder->setDitherImage(doDither); 271 decoder->setPreferQualityOverSpeed(preferQualityOverSpeed); 272 decoder->setRequireUnpremultipliedColors(requireUnpremultiplied); 273 274 SkBitmap* outputBitmap = NULL; 275 unsigned int existingBufferSize = 0; 276 if (javaBitmap != NULL) { 277 outputBitmap = (SkBitmap*) env->GetLongField(javaBitmap, gBitmap_nativeBitmapFieldID); 278 if (outputBitmap->isImmutable()) { 279 ALOGW("Unable to reuse an immutable bitmap as an image decoder target."); 280 javaBitmap = NULL; 281 outputBitmap = NULL; 282 } else { 283 existingBufferSize = GraphicsJNI::getBitmapAllocationByteCount(env, javaBitmap); 284 } 285 } 286 287 SkAutoTDelete<SkBitmap> adb(outputBitmap == NULL ? new SkBitmap : NULL); 288 if (outputBitmap == NULL) outputBitmap = adb.get(); 289 290 NinePatchPeeker peeker(decoder); 291 decoder->setPeeker(&peeker); 292 293 SkImageDecoder::Mode decodeMode = isPurgeable ? SkImageDecoder::kDecodeBounds_Mode : mode; 294 295 JavaPixelAllocator javaAllocator(env); 296 RecyclingPixelAllocator recyclingAllocator(outputBitmap->pixelRef(), existingBufferSize); 297 ScaleCheckingAllocator scaleCheckingAllocator(scale, existingBufferSize); 298 SkBitmap::Allocator* outputAllocator = (javaBitmap != NULL) ? 299 (SkBitmap::Allocator*)&recyclingAllocator : (SkBitmap::Allocator*)&javaAllocator; 300 if (decodeMode != SkImageDecoder::kDecodeBounds_Mode) { 301 if (!willScale) { 302 // If the java allocator is being used to allocate the pixel memory, the decoder 303 // need not write zeroes, since the memory is initialized to 0. 304 decoder->setSkipWritingZeroes(outputAllocator == &javaAllocator); 305 decoder->setAllocator(outputAllocator); 306 } else if (javaBitmap != NULL) { 307 // check for eventual scaled bounds at allocation time, so we don't decode the bitmap 308 // only to find the scaled result too large to fit in the allocation 309 decoder->setAllocator(&scaleCheckingAllocator); 310 } 311 } 312 313 // Only setup the decoder to be deleted after its stack-based, refcounted 314 // components (allocators, peekers, etc) are declared. This prevents RefCnt 315 // asserts from firing due to the order objects are deleted from the stack. 316 SkAutoTDelete<SkImageDecoder> add(decoder); 317 318 AutoDecoderCancel adc(options, decoder); 319 320 // To fix the race condition in case "requestCancelDecode" 321 // happens earlier than AutoDecoderCancel object is added 322 // to the gAutoDecoderCancelMutex linked list. 323 if (options != NULL && env->GetBooleanField(options, gOptions_mCancelID)) { 324 return nullObjectReturn("gOptions_mCancelID"); 325 } 326 327 SkBitmap decodingBitmap; 328 if (!decoder->decode(stream, &decodingBitmap, prefConfig, decodeMode)) { 329 return nullObjectReturn("decoder->decode returned false"); 330 } 331 332 int scaledWidth = decodingBitmap.width(); 333 int scaledHeight = decodingBitmap.height(); 334 335 if (willScale && mode != SkImageDecoder::kDecodeBounds_Mode) { 336 scaledWidth = int(scaledWidth * scale + 0.5f); 337 scaledHeight = int(scaledHeight * scale + 0.5f); 338 } 339 340 // update options (if any) 341 if (options != NULL) { 342 env->SetIntField(options, gOptions_widthFieldID, scaledWidth); 343 env->SetIntField(options, gOptions_heightFieldID, scaledHeight); 344 env->SetObjectField(options, gOptions_mimeFieldID, 345 getMimeTypeString(env, decoder->getFormat())); 346 } 347 348 // if we're in justBounds mode, return now (skip the java bitmap) 349 if (mode == SkImageDecoder::kDecodeBounds_Mode) { 350 return NULL; 351 } 352 353 jbyteArray ninePatchChunk = NULL; 354 if (peeker.fPatch != NULL) { 355 if (willScale) { 356 scaleNinePatchChunk(peeker.fPatch, scale); 357 } 358 359 size_t ninePatchArraySize = peeker.fPatch->serializedSize(); 360 ninePatchChunk = env->NewByteArray(ninePatchArraySize); 361 if (ninePatchChunk == NULL) { 362 return nullObjectReturn("ninePatchChunk == null"); 363 } 364 365 jbyte* array = (jbyte*) env->GetPrimitiveArrayCritical(ninePatchChunk, NULL); 366 if (array == NULL) { 367 return nullObjectReturn("primitive array == null"); 368 } 369 370 memcpy(array, peeker.fPatch, peeker.fPatchSize); 371 env->ReleasePrimitiveArrayCritical(ninePatchChunk, array, 0); 372 } 373 374 jintArray layoutBounds = NULL; 375 if (peeker.fLayoutBounds != NULL) { 376 layoutBounds = env->NewIntArray(4); 377 if (layoutBounds == NULL) { 378 return nullObjectReturn("layoutBounds == null"); 379 } 380 381 jint scaledBounds[4]; 382 if (willScale) { 383 for (int i=0; i<4; i++) { 384 scaledBounds[i] = (jint)((((jint*)peeker.fLayoutBounds)[i]*scale) + .5f); 385 } 386 } else { 387 memcpy(scaledBounds, (jint*)peeker.fLayoutBounds, sizeof(scaledBounds)); 388 } 389 env->SetIntArrayRegion(layoutBounds, 0, 4, scaledBounds); 390 if (javaBitmap != NULL) { 391 env->SetObjectField(javaBitmap, gBitmap_layoutBoundsFieldID, layoutBounds); 392 } 393 } 394 395 if (willScale) { 396 // This is weird so let me explain: we could use the scale parameter 397 // directly, but for historical reasons this is how the corresponding 398 // Dalvik code has always behaved. We simply recreate the behavior here. 399 // The result is slightly different from simply using scale because of 400 // the 0.5f rounding bias applied when computing the target image size 401 const float sx = scaledWidth / float(decodingBitmap.width()); 402 const float sy = scaledHeight / float(decodingBitmap.height()); 403 404 // TODO: avoid copying when scaled size equals decodingBitmap size 405 SkBitmap::Config config = configForScaledOutput(decodingBitmap.config()); 406 outputBitmap->setConfig(config, scaledWidth, scaledHeight); 407 outputBitmap->setIsOpaque(decodingBitmap.isOpaque()); 408 if (!outputBitmap->allocPixels(outputAllocator, NULL)) { 409 return nullObjectReturn("allocation failed for scaled bitmap"); 410 } 411 412 // If outputBitmap's pixels are newly allocated by Java, there is no need 413 // to erase to 0, since the pixels were initialized to 0. 414 if (outputAllocator != &javaAllocator) { 415 outputBitmap->eraseColor(0); 416 } 417 418 SkPaint paint; 419 paint.setFilterBitmap(true); 420 421 SkCanvas canvas(*outputBitmap); 422 canvas.scale(sx, sy); 423 canvas.drawBitmap(decodingBitmap, 0.0f, 0.0f, &paint); 424 } else { 425 outputBitmap->swap(decodingBitmap); 426 } 427 428 if (padding) { 429 if (peeker.fPatch != NULL) { 430 GraphicsJNI::set_jrect(env, padding, 431 peeker.fPatch->paddingLeft, peeker.fPatch->paddingTop, 432 peeker.fPatch->paddingRight, peeker.fPatch->paddingBottom); 433 } else { 434 GraphicsJNI::set_jrect(env, padding, -1, -1, -1, -1); 435 } 436 } 437 438 SkPixelRef* pr; 439 if (isPurgeable) { 440 pr = installPixelRef(outputBitmap, stream, sampleSize, doDither); 441 } else { 442 // if we get here, we're in kDecodePixels_Mode and will therefore 443 // already have a pixelref installed. 444 pr = outputBitmap->pixelRef(); 445 } 446 if (pr == NULL) { 447 return nullObjectReturn("Got null SkPixelRef"); 448 } 449 450 if (!isMutable && javaBitmap == NULL) { 451 // promise we will never change our pixels (great for sharing and pictures) 452 pr->setImmutable(); 453 } 454 455 // detach bitmap from its autodeleter, since we want to own it now 456 adb.detach(); 457 458 if (javaBitmap != NULL) { 459 bool isPremultiplied = !requireUnpremultiplied; 460 GraphicsJNI::reinitBitmap(env, javaBitmap, outputBitmap, isPremultiplied); 461 outputBitmap->notifyPixelsChanged(); 462 // If a java bitmap was passed in for reuse, pass it back 463 return javaBitmap; 464 } 465 466 int bitmapCreateFlags = 0x0; 467 if (isMutable) bitmapCreateFlags |= GraphicsJNI::kBitmapCreateFlag_Mutable; 468 if (!requireUnpremultiplied) bitmapCreateFlags |= GraphicsJNI::kBitmapCreateFlag_Premultiplied; 469 470 // now create the java bitmap 471 return GraphicsJNI::createBitmap(env, outputBitmap, javaAllocator.getStorageObj(), 472 bitmapCreateFlags, ninePatchChunk, layoutBounds, -1); 473} 474 475static jobject nativeDecodeStream(JNIEnv* env, jobject clazz, jobject is, jbyteArray storage, 476 jobject padding, jobject options) { 477 478 jobject bitmap = NULL; 479 SkAutoTUnref<SkStream> stream(CreateJavaInputStreamAdaptor(env, is, storage)); 480 481 if (stream.get()) { 482 // Need to buffer enough input to be able to rewind as much as might be read by a decoder 483 // trying to determine the stream's format. Currently the most is 64, read by 484 // SkImageDecoder_libwebp. 485 // FIXME: Get this number from SkImageDecoder 486 SkAutoTUnref<SkStreamRewindable> bufferedStream(SkFrontBufferedStream::Create(stream, 64)); 487 SkASSERT(bufferedStream.get() != NULL); 488 // for now we don't allow purgeable with java inputstreams 489 bitmap = doDecode(env, bufferedStream, padding, options, false, false); 490 } 491 return bitmap; 492} 493 494static jobject nativeDecodeFileDescriptor(JNIEnv* env, jobject clazz, jobject fileDescriptor, 495 jobject padding, jobject bitmapFactoryOptions) { 496 497 NPE_CHECK_RETURN_ZERO(env, fileDescriptor); 498 499 jint descriptor = jniGetFDFromFileDescriptor(env, fileDescriptor); 500 501 struct stat fdStat; 502 if (fstat(descriptor, &fdStat) == -1) { 503 doThrowIOE(env, "broken file descriptor"); 504 return nullObjectReturn("fstat return -1"); 505 } 506 507 bool isPurgeable = optionsPurgeable(env, bitmapFactoryOptions); 508 bool isShareable = optionsShareable(env, bitmapFactoryOptions); 509 bool weOwnTheFD = false; 510 if (isPurgeable && isShareable) { 511 int newFD = ::dup(descriptor); 512 if (-1 != newFD) { 513 weOwnTheFD = true; 514 descriptor = newFD; 515 } 516 } 517 518 SkAutoTUnref<SkData> data(SkData::NewFromFD(descriptor)); 519 if (data.get() == NULL) { 520 return nullObjectReturn("NewFromFD failed in nativeDecodeFileDescriptor"); 521 } 522 SkAutoTUnref<SkMemoryStream> stream(new SkMemoryStream(data)); 523 524 /* Allow purgeable iff we own the FD, i.e., in the puregeable and 525 shareable case. 526 */ 527 return doDecode(env, stream, padding, bitmapFactoryOptions, weOwnTheFD); 528} 529 530static jobject nativeDecodeAsset(JNIEnv* env, jobject clazz, jlong native_asset, 531 jobject padding, jobject options) { 532 533 SkStreamRewindable* stream; 534 Asset* asset = reinterpret_cast<Asset*>(native_asset); 535 bool forcePurgeable = optionsPurgeable(env, options); 536 if (forcePurgeable) { 537 // if we could "ref/reopen" the asset, we may not need to copy it here 538 // and we could assume optionsShareable, since assets are always RO 539 stream = CopyAssetToStream(asset); 540 if (stream == NULL) { 541 return NULL; 542 } 543 } else { 544 // since we know we'll be done with the asset when we return, we can 545 // just use a simple wrapper 546 stream = new AssetStreamAdaptor(asset); 547 } 548 SkAutoUnref aur(stream); 549 return doDecode(env, stream, padding, options, forcePurgeable, forcePurgeable); 550} 551 552static jobject nativeDecodeByteArray(JNIEnv* env, jobject, jbyteArray byteArray, 553 jint offset, jint length, jobject options) { 554 555 /* If optionsShareable() we could decide to just wrap the java array and 556 share it, but that means adding a globalref to the java array object 557 and managing its lifetime. For now we just always copy the array's data 558 if optionsPurgeable(), unless we're just decoding bounds. 559 */ 560 bool purgeable = optionsPurgeable(env, options) && !optionsJustBounds(env, options); 561 AutoJavaByteArray ar(env, byteArray); 562 SkMemoryStream* stream = new SkMemoryStream(ar.ptr() + offset, length, purgeable); 563 SkAutoUnref aur(stream); 564 return doDecode(env, stream, NULL, options, purgeable); 565} 566 567static void nativeRequestCancel(JNIEnv*, jobject joptions) { 568 (void)AutoDecoderCancel::RequestCancel(joptions); 569} 570 571static jboolean nativeIsSeekable(JNIEnv* env, jobject, jobject fileDescriptor) { 572 jint descriptor = jniGetFDFromFileDescriptor(env, fileDescriptor); 573 return ::lseek64(descriptor, 0, SEEK_CUR) != -1 ? JNI_TRUE : JNI_FALSE; 574} 575 576/////////////////////////////////////////////////////////////////////////////// 577 578static JNINativeMethod gMethods[] = { 579 { "nativeDecodeStream", 580 "(Ljava/io/InputStream;[BLandroid/graphics/Rect;Landroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;", 581 (void*)nativeDecodeStream 582 }, 583 584 { "nativeDecodeFileDescriptor", 585 "(Ljava/io/FileDescriptor;Landroid/graphics/Rect;Landroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;", 586 (void*)nativeDecodeFileDescriptor 587 }, 588 589 { "nativeDecodeAsset", 590 "(JLandroid/graphics/Rect;Landroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;", 591 (void*)nativeDecodeAsset 592 }, 593 594 { "nativeDecodeByteArray", 595 "([BIILandroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;", 596 (void*)nativeDecodeByteArray 597 }, 598 599 { "nativeIsSeekable", 600 "(Ljava/io/FileDescriptor;)Z", 601 (void*)nativeIsSeekable 602 }, 603}; 604 605static JNINativeMethod gOptionsMethods[] = { 606 { "requestCancel", "()V", (void*)nativeRequestCancel } 607}; 608 609static jfieldID getFieldIDCheck(JNIEnv* env, jclass clazz, 610 const char fieldname[], const char type[]) { 611 jfieldID id = env->GetFieldID(clazz, fieldname, type); 612 SkASSERT(id); 613 return id; 614} 615 616int register_android_graphics_BitmapFactory(JNIEnv* env) { 617 jclass options_class = env->FindClass("android/graphics/BitmapFactory$Options"); 618 SkASSERT(options_class); 619 gOptions_bitmapFieldID = getFieldIDCheck(env, options_class, "inBitmap", 620 "Landroid/graphics/Bitmap;"); 621 gOptions_justBoundsFieldID = getFieldIDCheck(env, options_class, "inJustDecodeBounds", "Z"); 622 gOptions_sampleSizeFieldID = getFieldIDCheck(env, options_class, "inSampleSize", "I"); 623 gOptions_configFieldID = getFieldIDCheck(env, options_class, "inPreferredConfig", 624 "Landroid/graphics/Bitmap$Config;"); 625 gOptions_premultipliedFieldID = getFieldIDCheck(env, options_class, "inPremultiplied", "Z"); 626 gOptions_mutableFieldID = getFieldIDCheck(env, options_class, "inMutable", "Z"); 627 gOptions_ditherFieldID = getFieldIDCheck(env, options_class, "inDither", "Z"); 628 gOptions_purgeableFieldID = getFieldIDCheck(env, options_class, "inPurgeable", "Z"); 629 gOptions_shareableFieldID = getFieldIDCheck(env, options_class, "inInputShareable", "Z"); 630 gOptions_preferQualityOverSpeedFieldID = getFieldIDCheck(env, options_class, 631 "inPreferQualityOverSpeed", "Z"); 632 gOptions_scaledFieldID = getFieldIDCheck(env, options_class, "inScaled", "Z"); 633 gOptions_densityFieldID = getFieldIDCheck(env, options_class, "inDensity", "I"); 634 gOptions_screenDensityFieldID = getFieldIDCheck(env, options_class, "inScreenDensity", "I"); 635 gOptions_targetDensityFieldID = getFieldIDCheck(env, options_class, "inTargetDensity", "I"); 636 gOptions_widthFieldID = getFieldIDCheck(env, options_class, "outWidth", "I"); 637 gOptions_heightFieldID = getFieldIDCheck(env, options_class, "outHeight", "I"); 638 gOptions_mimeFieldID = getFieldIDCheck(env, options_class, "outMimeType", "Ljava/lang/String;"); 639 gOptions_mCancelID = getFieldIDCheck(env, options_class, "mCancel", "Z"); 640 641 jclass bitmap_class = env->FindClass("android/graphics/Bitmap"); 642 SkASSERT(bitmap_class); 643 gBitmap_nativeBitmapFieldID = getFieldIDCheck(env, bitmap_class, "mNativeBitmap", "J"); 644 gBitmap_layoutBoundsFieldID = getFieldIDCheck(env, bitmap_class, "mLayoutBounds", "[I"); 645 int ret = AndroidRuntime::registerNativeMethods(env, 646 "android/graphics/BitmapFactory$Options", 647 gOptionsMethods, 648 SK_ARRAY_COUNT(gOptionsMethods)); 649 if (ret) { 650 return ret; 651 } 652 return android::AndroidRuntime::registerNativeMethods(env, "android/graphics/BitmapFactory", 653 gMethods, SK_ARRAY_COUNT(gMethods)); 654} 655