| #define LOG_TAG "BitmapFactory" |
| |
| #include "BitmapFactory.h" |
| #include "NinePatchPeeker.h" |
| #include "SkData.h" |
| #include "SkFrontBufferedStream.h" |
| #include "SkImageDecoder.h" |
| #include "SkImageRef_ashmem.h" |
| #include "SkImageRef_GlobalPool.h" |
| #include "SkPixelRef.h" |
| #include "SkStream.h" |
| #include "SkTemplates.h" |
| #include "SkUtils.h" |
| #include "CreateJavaOutputStreamAdaptor.h" |
| #include "AutoDecodeCancel.h" |
| #include "Utils.h" |
| #include "JNIHelp.h" |
| #include "GraphicsJNI.h" |
| |
| #include <android_runtime/AndroidRuntime.h> |
| #include <androidfw/Asset.h> |
| #include <androidfw/ResourceTypes.h> |
| #include <netinet/in.h> |
| #include <stdio.h> |
| #include <sys/mman.h> |
| #include <sys/stat.h> |
| |
| jfieldID gOptions_justBoundsFieldID; |
| jfieldID gOptions_sampleSizeFieldID; |
| jfieldID gOptions_configFieldID; |
| jfieldID gOptions_premultipliedFieldID; |
| jfieldID gOptions_mutableFieldID; |
| jfieldID gOptions_ditherFieldID; |
| jfieldID gOptions_purgeableFieldID; |
| jfieldID gOptions_shareableFieldID; |
| jfieldID gOptions_preferQualityOverSpeedFieldID; |
| jfieldID gOptions_scaledFieldID; |
| jfieldID gOptions_densityFieldID; |
| jfieldID gOptions_screenDensityFieldID; |
| jfieldID gOptions_targetDensityFieldID; |
| jfieldID gOptions_widthFieldID; |
| jfieldID gOptions_heightFieldID; |
| jfieldID gOptions_mimeFieldID; |
| jfieldID gOptions_mCancelID; |
| jfieldID gOptions_bitmapFieldID; |
| jfieldID gBitmap_nativeBitmapFieldID; |
| jfieldID gBitmap_layoutBoundsFieldID; |
| |
| #if 0 |
| #define TRACE_BITMAP(code) code |
| #else |
| #define TRACE_BITMAP(code) |
| #endif |
| |
| using namespace android; |
| |
| static inline int32_t validOrNeg1(bool isValid, int32_t value) { |
| // return isValid ? value : -1; |
| SkASSERT((int)isValid == 0 || (int)isValid == 1); |
| return ((int32_t)isValid - 1) | value; |
| } |
| |
| jstring getMimeTypeString(JNIEnv* env, SkImageDecoder::Format format) { |
| static const struct { |
| SkImageDecoder::Format fFormat; |
| const char* fMimeType; |
| } gMimeTypes[] = { |
| { SkImageDecoder::kBMP_Format, "image/bmp" }, |
| { SkImageDecoder::kGIF_Format, "image/gif" }, |
| { SkImageDecoder::kICO_Format, "image/x-ico" }, |
| { SkImageDecoder::kJPEG_Format, "image/jpeg" }, |
| { SkImageDecoder::kPNG_Format, "image/png" }, |
| { SkImageDecoder::kWEBP_Format, "image/webp" }, |
| { SkImageDecoder::kWBMP_Format, "image/vnd.wap.wbmp" } |
| }; |
| |
| const char* cstr = NULL; |
| for (size_t i = 0; i < SK_ARRAY_COUNT(gMimeTypes); i++) { |
| if (gMimeTypes[i].fFormat == format) { |
| cstr = gMimeTypes[i].fMimeType; |
| break; |
| } |
| } |
| |
| jstring jstr = 0; |
| if (NULL != cstr) { |
| jstr = env->NewStringUTF(cstr); |
| } |
| return jstr; |
| } |
| |
| static bool optionsPurgeable(JNIEnv* env, jobject options) { |
| return options != NULL && env->GetBooleanField(options, gOptions_purgeableFieldID); |
| } |
| |
| static bool optionsShareable(JNIEnv* env, jobject options) { |
| return options != NULL && env->GetBooleanField(options, gOptions_shareableFieldID); |
| } |
| |
| static bool optionsJustBounds(JNIEnv* env, jobject options) { |
| return options != NULL && env->GetBooleanField(options, gOptions_justBoundsFieldID); |
| } |
| |
| static void scaleNinePatchChunk(android::Res_png_9patch* chunk, float scale) { |
| chunk->paddingLeft = int(chunk->paddingLeft * scale + 0.5f); |
| chunk->paddingTop = int(chunk->paddingTop * scale + 0.5f); |
| chunk->paddingRight = int(chunk->paddingRight * scale + 0.5f); |
| chunk->paddingBottom = int(chunk->paddingBottom * scale + 0.5f); |
| |
| for (int i = 0; i < chunk->numXDivs; i++) { |
| chunk->xDivs[i] = int(chunk->xDivs[i] * scale + 0.5f); |
| if (i > 0 && chunk->xDivs[i] == chunk->xDivs[i - 1]) { |
| chunk->xDivs[i]++; |
| } |
| } |
| |
| for (int i = 0; i < chunk->numYDivs; i++) { |
| chunk->yDivs[i] = int(chunk->yDivs[i] * scale + 0.5f); |
| if (i > 0 && chunk->yDivs[i] == chunk->yDivs[i - 1]) { |
| chunk->yDivs[i]++; |
| } |
| } |
| } |
| |
| static SkPixelRef* installPixelRef(SkBitmap* bitmap, SkStreamRewindable* stream, |
| int sampleSize, bool ditherImage) { |
| |
| SkImageInfo bitmapInfo; |
| if (!bitmap->asImageInfo(&bitmapInfo)) { |
| ALOGW("bitmap has unknown configuration so no memory has been allocated"); |
| return NULL; |
| } |
| |
| SkImageRef* pr; |
| // only use ashmem for large images, since mmaps come at a price |
| if (bitmap->getSize() >= 32 * 1024) { |
| pr = new SkImageRef_ashmem(bitmapInfo, stream, sampleSize); |
| } else { |
| pr = new SkImageRef_GlobalPool(bitmapInfo, stream, sampleSize); |
| } |
| pr->setDitherImage(ditherImage); |
| bitmap->setPixelRef(pr)->unref(); |
| pr->isOpaque(bitmap); |
| return pr; |
| } |
| |
| static SkBitmap::Config configForScaledOutput(SkBitmap::Config config) { |
| switch (config) { |
| case SkBitmap::kNo_Config: |
| case SkBitmap::kIndex8_Config: |
| return SkBitmap::kARGB_8888_Config; |
| default: |
| break; |
| } |
| return config; |
| } |
| |
| class ScaleCheckingAllocator : public SkBitmap::HeapAllocator { |
| public: |
| ScaleCheckingAllocator(float scale, int size) |
| : mScale(scale), mSize(size) { |
| } |
| |
| virtual bool allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) { |
| // accounts for scale in final allocation, using eventual size and config |
| const int bytesPerPixel = SkBitmap::ComputeBytesPerPixel( |
| configForScaledOutput(bitmap->config())); |
| const int requestedSize = bytesPerPixel * |
| int(bitmap->width() * mScale + 0.5f) * |
| int(bitmap->height() * mScale + 0.5f); |
| if (requestedSize > mSize) { |
| ALOGW("bitmap for alloc reuse (%d bytes) can't fit scaled bitmap (%d bytes)", |
| mSize, requestedSize); |
| return false; |
| } |
| return SkBitmap::HeapAllocator::allocPixelRef(bitmap, ctable); |
| } |
| private: |
| const float mScale; |
| const int mSize; |
| }; |
| |
| class RecyclingPixelAllocator : public SkBitmap::Allocator { |
| public: |
| RecyclingPixelAllocator(SkPixelRef* pixelRef, unsigned int size) |
| : mPixelRef(pixelRef), mSize(size) { |
| SkSafeRef(mPixelRef); |
| } |
| |
| ~RecyclingPixelAllocator() { |
| SkSafeUnref(mPixelRef); |
| } |
| |
| virtual bool allocPixelRef(SkBitmap* bitmap, SkColorTable* ctable) { |
| if (!bitmap->getSize64().is32() || bitmap->getSize() > mSize) { |
| ALOGW("bitmap marked for reuse (%d bytes) can't fit new bitmap (%d bytes)", |
| mSize, bitmap->getSize()); |
| return false; |
| } |
| |
| SkImageInfo bitmapInfo; |
| if (!bitmap->asImageInfo(&bitmapInfo)) { |
| ALOGW("unable to reuse a bitmap as the target has an unknown bitmap configuration"); |
| return false; |
| } |
| |
| // Create a new pixelref with the new ctable that wraps the previous pixelref |
| SkPixelRef* pr = new AndroidPixelRef(*static_cast<AndroidPixelRef*>(mPixelRef), |
| bitmapInfo, bitmap->rowBytes(), ctable); |
| |
| bitmap->setPixelRef(pr)->unref(); |
| // since we're already allocated, we lockPixels right away |
| // HeapAllocator/JavaPixelAllocator behaves this way too |
| bitmap->lockPixels(); |
| return true; |
| } |
| |
| private: |
| SkPixelRef* const mPixelRef; |
| const unsigned int mSize; |
| }; |
| |
| // since we "may" create a purgeable imageref, we require the stream be ref'able |
| // i.e. dynamically allocated, since its lifetime may exceed the current stack |
| // frame. |
| static jobject doDecode(JNIEnv* env, SkStreamRewindable* stream, jobject padding, |
| jobject options, bool allowPurgeable, bool forcePurgeable = false) { |
| |
| int sampleSize = 1; |
| |
| SkImageDecoder::Mode mode = SkImageDecoder::kDecodePixels_Mode; |
| SkBitmap::Config prefConfig = SkBitmap::kARGB_8888_Config; |
| |
| bool doDither = true; |
| bool isMutable = false; |
| float scale = 1.0f; |
| bool isPurgeable = forcePurgeable || (allowPurgeable && optionsPurgeable(env, options)); |
| bool preferQualityOverSpeed = false; |
| bool requireUnpremultiplied = false; |
| |
| jobject javaBitmap = NULL; |
| |
| if (options != NULL) { |
| sampleSize = env->GetIntField(options, gOptions_sampleSizeFieldID); |
| if (optionsJustBounds(env, options)) { |
| mode = SkImageDecoder::kDecodeBounds_Mode; |
| } |
| |
| // initialize these, in case we fail later on |
| env->SetIntField(options, gOptions_widthFieldID, -1); |
| env->SetIntField(options, gOptions_heightFieldID, -1); |
| env->SetObjectField(options, gOptions_mimeFieldID, 0); |
| |
| jobject jconfig = env->GetObjectField(options, gOptions_configFieldID); |
| prefConfig = GraphicsJNI::getNativeBitmapConfig(env, jconfig); |
| isMutable = env->GetBooleanField(options, gOptions_mutableFieldID); |
| doDither = env->GetBooleanField(options, gOptions_ditherFieldID); |
| preferQualityOverSpeed = env->GetBooleanField(options, |
| gOptions_preferQualityOverSpeedFieldID); |
| requireUnpremultiplied = !env->GetBooleanField(options, gOptions_premultipliedFieldID); |
| javaBitmap = env->GetObjectField(options, gOptions_bitmapFieldID); |
| |
| if (env->GetBooleanField(options, gOptions_scaledFieldID)) { |
| const int density = env->GetIntField(options, gOptions_densityFieldID); |
| const int targetDensity = env->GetIntField(options, gOptions_targetDensityFieldID); |
| const int screenDensity = env->GetIntField(options, gOptions_screenDensityFieldID); |
| if (density != 0 && targetDensity != 0 && density != screenDensity) { |
| scale = (float) targetDensity / density; |
| } |
| } |
| } |
| |
| const bool willScale = scale != 1.0f; |
| isPurgeable &= !willScale; |
| |
| SkImageDecoder* decoder = SkImageDecoder::Factory(stream); |
| if (decoder == NULL) { |
| return nullObjectReturn("SkImageDecoder::Factory returned null"); |
| } |
| |
| decoder->setSampleSize(sampleSize); |
| decoder->setDitherImage(doDither); |
| decoder->setPreferQualityOverSpeed(preferQualityOverSpeed); |
| decoder->setRequireUnpremultipliedColors(requireUnpremultiplied); |
| |
| SkBitmap* outputBitmap = NULL; |
| unsigned int existingBufferSize = 0; |
| if (javaBitmap != NULL) { |
| outputBitmap = (SkBitmap*) env->GetIntField(javaBitmap, gBitmap_nativeBitmapFieldID); |
| if (outputBitmap->isImmutable()) { |
| ALOGW("Unable to reuse an immutable bitmap as an image decoder target."); |
| javaBitmap = NULL; |
| outputBitmap = NULL; |
| } else { |
| existingBufferSize = GraphicsJNI::getBitmapAllocationByteCount(env, javaBitmap); |
| } |
| } |
| |
| SkAutoTDelete<SkBitmap> adb(outputBitmap == NULL ? new SkBitmap : NULL); |
| if (outputBitmap == NULL) outputBitmap = adb.get(); |
| |
| NinePatchPeeker peeker(decoder); |
| decoder->setPeeker(&peeker); |
| |
| SkImageDecoder::Mode decodeMode = isPurgeable ? SkImageDecoder::kDecodeBounds_Mode : mode; |
| |
| JavaPixelAllocator javaAllocator(env); |
| RecyclingPixelAllocator recyclingAllocator(outputBitmap->pixelRef(), existingBufferSize); |
| ScaleCheckingAllocator scaleCheckingAllocator(scale, existingBufferSize); |
| SkBitmap::Allocator* outputAllocator = (javaBitmap != NULL) ? |
| (SkBitmap::Allocator*)&recyclingAllocator : (SkBitmap::Allocator*)&javaAllocator; |
| if (decodeMode != SkImageDecoder::kDecodeBounds_Mode) { |
| if (!willScale) { |
| // If the java allocator is being used to allocate the pixel memory, the decoder |
| // need not write zeroes, since the memory is initialized to 0. |
| decoder->setSkipWritingZeroes(outputAllocator == &javaAllocator); |
| decoder->setAllocator(outputAllocator); |
| } else if (javaBitmap != NULL) { |
| // check for eventual scaled bounds at allocation time, so we don't decode the bitmap |
| // only to find the scaled result too large to fit in the allocation |
| decoder->setAllocator(&scaleCheckingAllocator); |
| } |
| } |
| |
| // Only setup the decoder to be deleted after its stack-based, refcounted |
| // components (allocators, peekers, etc) are declared. This prevents RefCnt |
| // asserts from firing due to the order objects are deleted from the stack. |
| SkAutoTDelete<SkImageDecoder> add(decoder); |
| |
| AutoDecoderCancel adc(options, decoder); |
| |
| // To fix the race condition in case "requestCancelDecode" |
| // happens earlier than AutoDecoderCancel object is added |
| // to the gAutoDecoderCancelMutex linked list. |
| if (options != NULL && env->GetBooleanField(options, gOptions_mCancelID)) { |
| return nullObjectReturn("gOptions_mCancelID"); |
| } |
| |
| SkBitmap decodingBitmap; |
| if (!decoder->decode(stream, &decodingBitmap, prefConfig, decodeMode)) { |
| return nullObjectReturn("decoder->decode returned false"); |
| } |
| |
| int scaledWidth = decodingBitmap.width(); |
| int scaledHeight = decodingBitmap.height(); |
| |
| if (willScale && mode != SkImageDecoder::kDecodeBounds_Mode) { |
| scaledWidth = int(scaledWidth * scale + 0.5f); |
| scaledHeight = int(scaledHeight * scale + 0.5f); |
| } |
| |
| // update options (if any) |
| if (options != NULL) { |
| env->SetIntField(options, gOptions_widthFieldID, scaledWidth); |
| env->SetIntField(options, gOptions_heightFieldID, scaledHeight); |
| env->SetObjectField(options, gOptions_mimeFieldID, |
| getMimeTypeString(env, decoder->getFormat())); |
| } |
| |
| // if we're in justBounds mode, return now (skip the java bitmap) |
| if (mode == SkImageDecoder::kDecodeBounds_Mode) { |
| return NULL; |
| } |
| |
| jbyteArray ninePatchChunk = NULL; |
| if (peeker.fPatch != NULL) { |
| if (willScale) { |
| scaleNinePatchChunk(peeker.fPatch, scale); |
| } |
| |
| size_t ninePatchArraySize = peeker.fPatch->serializedSize(); |
| ninePatchChunk = env->NewByteArray(ninePatchArraySize); |
| if (ninePatchChunk == NULL) { |
| return nullObjectReturn("ninePatchChunk == null"); |
| } |
| |
| jbyte* array = (jbyte*) env->GetPrimitiveArrayCritical(ninePatchChunk, NULL); |
| if (array == NULL) { |
| return nullObjectReturn("primitive array == null"); |
| } |
| |
| peeker.fPatch->serialize(array); |
| env->ReleasePrimitiveArrayCritical(ninePatchChunk, array, 0); |
| } |
| |
| jintArray layoutBounds = NULL; |
| if (peeker.fLayoutBounds != NULL) { |
| layoutBounds = env->NewIntArray(4); |
| if (layoutBounds == NULL) { |
| return nullObjectReturn("layoutBounds == null"); |
| } |
| |
| jint scaledBounds[4]; |
| if (willScale) { |
| for (int i=0; i<4; i++) { |
| scaledBounds[i] = (jint)((((jint*)peeker.fLayoutBounds)[i]*scale) + .5f); |
| } |
| } else { |
| memcpy(scaledBounds, (jint*)peeker.fLayoutBounds, sizeof(scaledBounds)); |
| } |
| env->SetIntArrayRegion(layoutBounds, 0, 4, scaledBounds); |
| if (javaBitmap != NULL) { |
| env->SetObjectField(javaBitmap, gBitmap_layoutBoundsFieldID, layoutBounds); |
| } |
| } |
| |
| if (willScale) { |
| // This is weird so let me explain: we could use the scale parameter |
| // directly, but for historical reasons this is how the corresponding |
| // Dalvik code has always behaved. We simply recreate the behavior here. |
| // The result is slightly different from simply using scale because of |
| // the 0.5f rounding bias applied when computing the target image size |
| const float sx = scaledWidth / float(decodingBitmap.width()); |
| const float sy = scaledHeight / float(decodingBitmap.height()); |
| |
| // TODO: avoid copying when scaled size equals decodingBitmap size |
| SkBitmap::Config config = configForScaledOutput(decodingBitmap.config()); |
| // FIXME: If the alphaType is kUnpremul and the image has alpha, the |
| // colors may not be correct, since Skia does not yet support drawing |
| // to/from unpremultiplied bitmaps. |
| outputBitmap->setConfig(config, scaledWidth, scaledHeight, 0, |
| decodingBitmap.alphaType()); |
| if (!outputBitmap->allocPixels(outputAllocator, NULL)) { |
| return nullObjectReturn("allocation failed for scaled bitmap"); |
| } |
| |
| // If outputBitmap's pixels are newly allocated by Java, there is no need |
| // to erase to 0, since the pixels were initialized to 0. |
| if (outputAllocator != &javaAllocator) { |
| outputBitmap->eraseColor(0); |
| } |
| |
| SkPaint paint; |
| paint.setFilterLevel(SkPaint::kLow_FilterLevel); |
| |
| SkCanvas canvas(*outputBitmap); |
| canvas.scale(sx, sy); |
| canvas.drawBitmap(decodingBitmap, 0.0f, 0.0f, &paint); |
| } else { |
| outputBitmap->swap(decodingBitmap); |
| } |
| |
| if (padding) { |
| if (peeker.fPatch != NULL) { |
| GraphicsJNI::set_jrect(env, padding, |
| peeker.fPatch->paddingLeft, peeker.fPatch->paddingTop, |
| peeker.fPatch->paddingRight, peeker.fPatch->paddingBottom); |
| } else { |
| GraphicsJNI::set_jrect(env, padding, -1, -1, -1, -1); |
| } |
| } |
| |
| SkPixelRef* pr; |
| if (isPurgeable) { |
| pr = installPixelRef(outputBitmap, stream, sampleSize, doDither); |
| } else { |
| // if we get here, we're in kDecodePixels_Mode and will therefore |
| // already have a pixelref installed. |
| pr = outputBitmap->pixelRef(); |
| } |
| if (pr == NULL) { |
| return nullObjectReturn("Got null SkPixelRef"); |
| } |
| |
| if (!isMutable && javaBitmap == NULL) { |
| // promise we will never change our pixels (great for sharing and pictures) |
| pr->setImmutable(); |
| } |
| |
| // detach bitmap from its autodeleter, since we want to own it now |
| adb.detach(); |
| |
| if (javaBitmap != NULL) { |
| bool isPremultiplied = !requireUnpremultiplied; |
| GraphicsJNI::reinitBitmap(env, javaBitmap, outputBitmap, isPremultiplied); |
| outputBitmap->notifyPixelsChanged(); |
| // If a java bitmap was passed in for reuse, pass it back |
| return javaBitmap; |
| } |
| |
| int bitmapCreateFlags = 0x0; |
| if (isMutable) bitmapCreateFlags |= GraphicsJNI::kBitmapCreateFlag_Mutable; |
| if (!requireUnpremultiplied) bitmapCreateFlags |= GraphicsJNI::kBitmapCreateFlag_Premultiplied; |
| |
| // now create the java bitmap |
| return GraphicsJNI::createBitmap(env, outputBitmap, javaAllocator.getStorageObj(), |
| bitmapCreateFlags, ninePatchChunk, layoutBounds, -1); |
| } |
| |
| // Need to buffer enough input to be able to rewind as much as might be read by a decoder |
| // trying to determine the stream's format. Currently the most is 64, read by |
| // SkImageDecoder_libwebp. |
| // FIXME: Get this number from SkImageDecoder |
| #define BYTES_TO_BUFFER 64 |
| |
| static jobject nativeDecodeStream(JNIEnv* env, jobject clazz, jobject is, jbyteArray storage, |
| jobject padding, jobject options) { |
| |
| jobject bitmap = NULL; |
| SkAutoTUnref<SkStream> stream(CreateJavaInputStreamAdaptor(env, is, storage)); |
| |
| if (stream.get()) { |
| SkAutoTUnref<SkStreamRewindable> bufferedStream( |
| SkFrontBufferedStream::Create(stream, BYTES_TO_BUFFER)); |
| SkASSERT(bufferedStream.get() != NULL); |
| // for now we don't allow purgeable with java inputstreams |
| bitmap = doDecode(env, bufferedStream, padding, options, false, false); |
| } |
| return bitmap; |
| } |
| |
| static jobject nativeDecodeFileDescriptor(JNIEnv* env, jobject clazz, jobject fileDescriptor, |
| jobject padding, jobject bitmapFactoryOptions) { |
| |
| NPE_CHECK_RETURN_ZERO(env, fileDescriptor); |
| |
| jint descriptor = jniGetFDFromFileDescriptor(env, fileDescriptor); |
| |
| struct stat fdStat; |
| if (fstat(descriptor, &fdStat) == -1) { |
| doThrowIOE(env, "broken file descriptor"); |
| return nullObjectReturn("fstat return -1"); |
| } |
| |
| // Restore the descriptor's offset on exiting this function. |
| AutoFDSeek autoRestore(descriptor); |
| |
| FILE* file = fdopen(descriptor, "r"); |
| if (file == NULL) { |
| return nullObjectReturn("Could not open file"); |
| } |
| |
| SkAutoTUnref<SkFILEStream> fileStream(new SkFILEStream(file, |
| SkFILEStream::kCallerRetains_Ownership)); |
| |
| SkAutoTUnref<SkStreamRewindable> stream; |
| |
| // Retain the old behavior of allowing purgeable if both purgeable and |
| // shareable are set to true. |
| bool isPurgeable = optionsPurgeable(env, bitmapFactoryOptions) |
| && optionsShareable(env, bitmapFactoryOptions); |
| if (isPurgeable) { |
| // Copy the stream, so the image can be decoded multiple times without |
| // continuing to modify the original file descriptor. |
| // Copy beginning from the current position. |
| const size_t fileSize = fileStream->getLength() - fileStream->getPosition(); |
| void* buffer = sk_malloc_flags(fileSize, 0); |
| if (buffer == NULL) { |
| return nullObjectReturn("Could not make a copy for ashmem"); |
| } |
| |
| SkAutoTUnref<SkData> data(SkData::NewFromMalloc(buffer, fileSize)); |
| |
| if (fileStream->read(buffer, fileSize) != fileSize) { |
| return nullObjectReturn("Could not read the file."); |
| } |
| |
| stream.reset(new SkMemoryStream(data)); |
| } else { |
| // Use a buffered stream. Although an SkFILEStream can be rewound, this |
| // ensures that SkImageDecoder::Factory never rewinds beyond the |
| // current position of the file descriptor. |
| stream.reset(SkFrontBufferedStream::Create(fileStream, BYTES_TO_BUFFER)); |
| } |
| |
| return doDecode(env, stream, padding, bitmapFactoryOptions, isPurgeable); |
| } |
| |
| static jobject nativeDecodeAsset(JNIEnv* env, jobject clazz, jint native_asset, |
| jobject padding, jobject options) { |
| |
| SkStreamRewindable* stream; |
| Asset* asset = reinterpret_cast<Asset*>(native_asset); |
| bool forcePurgeable = optionsPurgeable(env, options); |
| if (forcePurgeable) { |
| // if we could "ref/reopen" the asset, we may not need to copy it here |
| // and we could assume optionsShareable, since assets are always RO |
| stream = CopyAssetToStream(asset); |
| if (stream == NULL) { |
| return NULL; |
| } |
| } else { |
| // since we know we'll be done with the asset when we return, we can |
| // just use a simple wrapper |
| stream = new AssetStreamAdaptor(asset, |
| AssetStreamAdaptor::kNo_OwnAsset, |
| AssetStreamAdaptor::kNo_HasMemoryBase); |
| } |
| SkAutoUnref aur(stream); |
| return doDecode(env, stream, padding, options, forcePurgeable, forcePurgeable); |
| } |
| |
| static jobject nativeDecodeByteArray(JNIEnv* env, jobject, jbyteArray byteArray, |
| int offset, int length, jobject options) { |
| |
| /* If optionsShareable() we could decide to just wrap the java array and |
| share it, but that means adding a globalref to the java array object |
| and managing its lifetime. For now we just always copy the array's data |
| if optionsPurgeable(), unless we're just decoding bounds. |
| */ |
| bool purgeable = optionsPurgeable(env, options) && !optionsJustBounds(env, options); |
| AutoJavaByteArray ar(env, byteArray); |
| SkMemoryStream* stream = new SkMemoryStream(ar.ptr() + offset, length, purgeable); |
| SkAutoUnref aur(stream); |
| return doDecode(env, stream, NULL, options, purgeable); |
| } |
| |
| static void nativeRequestCancel(JNIEnv*, jobject joptions) { |
| (void)AutoDecoderCancel::RequestCancel(joptions); |
| } |
| |
| static jboolean nativeIsSeekable(JNIEnv* env, jobject, jobject fileDescriptor) { |
| jint descriptor = jniGetFDFromFileDescriptor(env, fileDescriptor); |
| return ::lseek64(descriptor, 0, SEEK_CUR) != -1 ? JNI_TRUE : JNI_FALSE; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static JNINativeMethod gMethods[] = { |
| { "nativeDecodeStream", |
| "(Ljava/io/InputStream;[BLandroid/graphics/Rect;Landroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;", |
| (void*)nativeDecodeStream |
| }, |
| |
| { "nativeDecodeFileDescriptor", |
| "(Ljava/io/FileDescriptor;Landroid/graphics/Rect;Landroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;", |
| (void*)nativeDecodeFileDescriptor |
| }, |
| |
| { "nativeDecodeAsset", |
| "(ILandroid/graphics/Rect;Landroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;", |
| (void*)nativeDecodeAsset |
| }, |
| |
| { "nativeDecodeByteArray", |
| "([BIILandroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;", |
| (void*)nativeDecodeByteArray |
| }, |
| |
| { "nativeIsSeekable", |
| "(Ljava/io/FileDescriptor;)Z", |
| (void*)nativeIsSeekable |
| }, |
| }; |
| |
| static JNINativeMethod gOptionsMethods[] = { |
| { "requestCancel", "()V", (void*)nativeRequestCancel } |
| }; |
| |
| static jfieldID getFieldIDCheck(JNIEnv* env, jclass clazz, |
| const char fieldname[], const char type[]) { |
| jfieldID id = env->GetFieldID(clazz, fieldname, type); |
| SkASSERT(id); |
| return id; |
| } |
| |
| int register_android_graphics_BitmapFactory(JNIEnv* env) { |
| jclass options_class = env->FindClass("android/graphics/BitmapFactory$Options"); |
| SkASSERT(options_class); |
| gOptions_bitmapFieldID = getFieldIDCheck(env, options_class, "inBitmap", |
| "Landroid/graphics/Bitmap;"); |
| gOptions_justBoundsFieldID = getFieldIDCheck(env, options_class, "inJustDecodeBounds", "Z"); |
| gOptions_sampleSizeFieldID = getFieldIDCheck(env, options_class, "inSampleSize", "I"); |
| gOptions_configFieldID = getFieldIDCheck(env, options_class, "inPreferredConfig", |
| "Landroid/graphics/Bitmap$Config;"); |
| gOptions_premultipliedFieldID = getFieldIDCheck(env, options_class, "inPremultiplied", "Z"); |
| gOptions_mutableFieldID = getFieldIDCheck(env, options_class, "inMutable", "Z"); |
| gOptions_ditherFieldID = getFieldIDCheck(env, options_class, "inDither", "Z"); |
| gOptions_purgeableFieldID = getFieldIDCheck(env, options_class, "inPurgeable", "Z"); |
| gOptions_shareableFieldID = getFieldIDCheck(env, options_class, "inInputShareable", "Z"); |
| gOptions_preferQualityOverSpeedFieldID = getFieldIDCheck(env, options_class, |
| "inPreferQualityOverSpeed", "Z"); |
| gOptions_scaledFieldID = getFieldIDCheck(env, options_class, "inScaled", "Z"); |
| gOptions_densityFieldID = getFieldIDCheck(env, options_class, "inDensity", "I"); |
| gOptions_screenDensityFieldID = getFieldIDCheck(env, options_class, "inScreenDensity", "I"); |
| gOptions_targetDensityFieldID = getFieldIDCheck(env, options_class, "inTargetDensity", "I"); |
| gOptions_widthFieldID = getFieldIDCheck(env, options_class, "outWidth", "I"); |
| gOptions_heightFieldID = getFieldIDCheck(env, options_class, "outHeight", "I"); |
| gOptions_mimeFieldID = getFieldIDCheck(env, options_class, "outMimeType", "Ljava/lang/String;"); |
| gOptions_mCancelID = getFieldIDCheck(env, options_class, "mCancel", "Z"); |
| |
| jclass bitmap_class = env->FindClass("android/graphics/Bitmap"); |
| SkASSERT(bitmap_class); |
| gBitmap_nativeBitmapFieldID = getFieldIDCheck(env, bitmap_class, "mNativeBitmap", "I"); |
| gBitmap_layoutBoundsFieldID = getFieldIDCheck(env, bitmap_class, "mLayoutBounds", "[I"); |
| int ret = AndroidRuntime::registerNativeMethods(env, |
| "android/graphics/BitmapFactory$Options", |
| gOptionsMethods, |
| SK_ARRAY_COUNT(gOptionsMethods)); |
| if (ret) { |
| return ret; |
| } |
| return android::AndroidRuntime::registerNativeMethods(env, "android/graphics/BitmapFactory", |
| gMethods, SK_ARRAY_COUNT(gMethods)); |
| } |