| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define LOG_TAG "BitmapRegionDecoder" |
| |
| #include "SkBitmap.h" |
| #include "SkData.h" |
| #include "SkImageEncoder.h" |
| #include "GraphicsJNI.h" |
| #include "SkUtils.h" |
| #include "SkTemplates.h" |
| #include "SkPixelRef.h" |
| #include "SkStream.h" |
| #include "BitmapFactory.h" |
| #include "AutoDecodeCancel.h" |
| #include "CreateJavaOutputStreamAdaptor.h" |
| #include "Utils.h" |
| #include "JNIHelp.h" |
| |
| #include <android_runtime/AndroidRuntime.h> |
| #include "android_util_Binder.h" |
| #include "android_nio_utils.h" |
| #include "CreateJavaOutputStreamAdaptor.h" |
| |
| #include <binder/Parcel.h> |
| #include <jni.h> |
| #include <androidfw/Asset.h> |
| #include <sys/stat.h> |
| |
| #if 0 |
| #define TRACE_BITMAP(code) code |
| #else |
| #define TRACE_BITMAP(code) |
| #endif |
| |
| using namespace android; |
| |
| class SkBitmapRegionDecoder { |
| public: |
| SkBitmapRegionDecoder(SkImageDecoder* decoder, int width, int height) { |
| fDecoder = decoder; |
| fWidth = width; |
| fHeight = height; |
| } |
| ~SkBitmapRegionDecoder() { |
| SkDELETE(fDecoder); |
| } |
| |
| bool decodeRegion(SkBitmap* bitmap, const SkIRect& rect, |
| SkColorType pref, int sampleSize) { |
| fDecoder->setSampleSize(sampleSize); |
| return fDecoder->decodeSubset(bitmap, rect, pref); |
| } |
| |
| SkImageDecoder* getDecoder() const { return fDecoder; } |
| int getWidth() const { return fWidth; } |
| int getHeight() const { return fHeight; } |
| |
| private: |
| SkImageDecoder* fDecoder; |
| int fWidth; |
| int fHeight; |
| }; |
| |
| static jobject createBitmapRegionDecoder(JNIEnv* env, SkStreamRewindable* stream) { |
| SkImageDecoder* decoder = SkImageDecoder::Factory(stream); |
| int width, height; |
| if (NULL == decoder) { |
| doThrowIOE(env, "Image format not supported"); |
| return nullObjectReturn("SkImageDecoder::Factory returned null"); |
| } |
| |
| JavaPixelAllocator *javaAllocator = new JavaPixelAllocator(env); |
| decoder->setAllocator(javaAllocator); |
| javaAllocator->unref(); |
| |
| if (!decoder->buildTileIndex(stream, &width, &height)) { |
| char msg[100]; |
| snprintf(msg, sizeof(msg), "Image failed to decode using %s decoder", |
| decoder->getFormatName()); |
| doThrowIOE(env, msg); |
| SkDELETE(decoder); |
| return nullObjectReturn("decoder->buildTileIndex returned false"); |
| } |
| |
| SkBitmapRegionDecoder *bm = new SkBitmapRegionDecoder(decoder, width, height); |
| return GraphicsJNI::createBitmapRegionDecoder(env, bm); |
| } |
| |
| static jobject nativeNewInstanceFromByteArray(JNIEnv* env, jobject, jbyteArray byteArray, |
| jint offset, jint length, jboolean isShareable) { |
| /* If isShareable we could decide to just wrap the java array and |
| share it, but that means adding a globalref to the java array object |
| For now we just always copy the array's data if isShareable. |
| */ |
| AutoJavaByteArray ar(env, byteArray); |
| SkMemoryStream* stream = new SkMemoryStream(ar.ptr() + offset, length, true); |
| |
| jobject brd = createBitmapRegionDecoder(env, stream); |
| SkSafeUnref(stream); // the decoder now holds a reference |
| return brd; |
| } |
| |
| static jobject nativeNewInstanceFromFileDescriptor(JNIEnv* env, jobject clazz, |
| jobject fileDescriptor, jboolean isShareable) { |
| 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"); |
| } |
| |
| SkAutoTUnref<SkData> data(SkData::NewFromFD(descriptor)); |
| SkMemoryStream* stream = new SkMemoryStream(data); |
| |
| jobject brd = createBitmapRegionDecoder(env, stream); |
| SkSafeUnref(stream); // the decoder now holds a reference |
| return brd; |
| } |
| |
| static jobject nativeNewInstanceFromStream(JNIEnv* env, jobject clazz, |
| jobject is, // InputStream |
| jbyteArray storage, // byte[] |
| jboolean isShareable) { |
| jobject brd = NULL; |
| // for now we don't allow shareable with java inputstreams |
| SkStreamRewindable* stream = CopyJavaInputStream(env, is, storage); |
| |
| if (stream) { |
| brd = createBitmapRegionDecoder(env, stream); |
| stream->unref(); // the decoder now holds a reference |
| } |
| return brd; |
| } |
| |
| static jobject nativeNewInstanceFromAsset(JNIEnv* env, jobject clazz, |
| jlong native_asset, // Asset |
| jboolean isShareable) { |
| Asset* asset = reinterpret_cast<Asset*>(native_asset); |
| SkAutoTUnref<SkMemoryStream> stream(CopyAssetToStream(asset)); |
| if (NULL == stream.get()) { |
| return NULL; |
| } |
| |
| jobject brd = createBitmapRegionDecoder(env, stream.get()); |
| // The decoder now holds a reference to stream. |
| return brd; |
| } |
| |
| /* |
| * nine patch not supported |
| * |
| * purgeable not supported |
| * reportSizeToVM not supported |
| */ |
| static jobject nativeDecodeRegion(JNIEnv* env, jobject, jlong brdHandle, |
| jint start_x, jint start_y, jint width, jint height, jobject options) { |
| SkBitmapRegionDecoder *brd = reinterpret_cast<SkBitmapRegionDecoder*>(brdHandle); |
| jobject tileBitmap = NULL; |
| SkImageDecoder *decoder = brd->getDecoder(); |
| int sampleSize = 1; |
| SkColorType prefColorType = kUnknown_SkColorType; |
| bool doDither = true; |
| bool preferQualityOverSpeed = false; |
| bool requireUnpremultiplied = false; |
| |
| if (NULL != options) { |
| sampleSize = env->GetIntField(options, gOptions_sampleSizeFieldID); |
| // 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); |
| prefColorType = GraphicsJNI::getNativeBitmapColorType(env, jconfig); |
| doDither = env->GetBooleanField(options, gOptions_ditherFieldID); |
| preferQualityOverSpeed = env->GetBooleanField(options, |
| gOptions_preferQualityOverSpeedFieldID); |
| // Get the bitmap for re-use if it exists. |
| tileBitmap = env->GetObjectField(options, gOptions_bitmapFieldID); |
| requireUnpremultiplied = !env->GetBooleanField(options, gOptions_premultipliedFieldID); |
| } |
| |
| decoder->setDitherImage(doDither); |
| decoder->setPreferQualityOverSpeed(preferQualityOverSpeed); |
| decoder->setRequireUnpremultipliedColors(requireUnpremultiplied); |
| 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 (NULL != options && env->GetBooleanField(options, gOptions_mCancelID)) { |
| return nullObjectReturn("gOptions_mCancelID");; |
| } |
| |
| SkIRect region; |
| region.fLeft = start_x; |
| region.fTop = start_y; |
| region.fRight = start_x + width; |
| region.fBottom = start_y + height; |
| SkBitmap* bitmap = NULL; |
| SkAutoTDelete<SkBitmap> adb; |
| |
| if (tileBitmap != NULL) { |
| // Re-use bitmap. |
| bitmap = GraphicsJNI::getNativeBitmap(env, tileBitmap); |
| } |
| if (bitmap == NULL) { |
| bitmap = new SkBitmap; |
| adb.reset(bitmap); |
| } |
| |
| if (!brd->decodeRegion(bitmap, region, prefColorType, sampleSize)) { |
| return nullObjectReturn("decoder->decodeRegion returned false"); |
| } |
| |
| // update options (if any) |
| if (NULL != options) { |
| env->SetIntField(options, gOptions_widthFieldID, bitmap->width()); |
| env->SetIntField(options, gOptions_heightFieldID, bitmap->height()); |
| // TODO: set the mimeType field with the data from the codec. |
| // but how to reuse a set of strings, rather than allocating new one |
| // each time? |
| env->SetObjectField(options, gOptions_mimeFieldID, |
| getMimeTypeString(env, decoder->getFormat())); |
| } |
| |
| if (tileBitmap != NULL) { |
| bitmap->notifyPixelsChanged(); |
| return tileBitmap; |
| } |
| |
| // detach bitmap from its autodeleter, since we want to own it now |
| adb.detach(); |
| |
| JavaPixelAllocator* allocator = (JavaPixelAllocator*) decoder->getAllocator(); |
| jbyteArray buff = allocator->getStorageObjAndReset(); |
| |
| int bitmapCreateFlags = 0; |
| if (!requireUnpremultiplied) bitmapCreateFlags |= GraphicsJNI::kBitmapCreateFlag_Premultiplied; |
| return GraphicsJNI::createBitmap(env, bitmap, buff, bitmapCreateFlags, NULL, NULL, -1); |
| } |
| |
| static jint nativeGetHeight(JNIEnv* env, jobject, jlong brdHandle) { |
| SkBitmapRegionDecoder *brd = reinterpret_cast<SkBitmapRegionDecoder*>(brdHandle); |
| return static_cast<jint>(brd->getHeight()); |
| } |
| |
| static jint nativeGetWidth(JNIEnv* env, jobject, jlong brdHandle) { |
| SkBitmapRegionDecoder *brd = reinterpret_cast<SkBitmapRegionDecoder*>(brdHandle); |
| return static_cast<jint>(brd->getWidth()); |
| } |
| |
| static void nativeClean(JNIEnv* env, jobject, jlong brdHandle) { |
| SkBitmapRegionDecoder *brd = reinterpret_cast<SkBitmapRegionDecoder*>(brdHandle); |
| delete brd; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #include <android_runtime/AndroidRuntime.h> |
| |
| static JNINativeMethod gBitmapRegionDecoderMethods[] = { |
| { "nativeDecodeRegion", |
| "(JIIIILandroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;", |
| (void*)nativeDecodeRegion}, |
| |
| { "nativeGetHeight", "(J)I", (void*)nativeGetHeight}, |
| |
| { "nativeGetWidth", "(J)I", (void*)nativeGetWidth}, |
| |
| { "nativeClean", "(J)V", (void*)nativeClean}, |
| |
| { "nativeNewInstance", |
| "([BIIZ)Landroid/graphics/BitmapRegionDecoder;", |
| (void*)nativeNewInstanceFromByteArray |
| }, |
| |
| { "nativeNewInstance", |
| "(Ljava/io/InputStream;[BZ)Landroid/graphics/BitmapRegionDecoder;", |
| (void*)nativeNewInstanceFromStream |
| }, |
| |
| { "nativeNewInstance", |
| "(Ljava/io/FileDescriptor;Z)Landroid/graphics/BitmapRegionDecoder;", |
| (void*)nativeNewInstanceFromFileDescriptor |
| }, |
| |
| { "nativeNewInstance", |
| "(JZ)Landroid/graphics/BitmapRegionDecoder;", |
| (void*)nativeNewInstanceFromAsset |
| }, |
| }; |
| |
| #define kClassPathName "android/graphics/BitmapRegionDecoder" |
| |
| int register_android_graphics_BitmapRegionDecoder(JNIEnv* env) |
| { |
| return android::AndroidRuntime::registerNativeMethods(env, kClassPathName, |
| gBitmapRegionDecoderMethods, SK_ARRAY_COUNT(gBitmapRegionDecoderMethods)); |
| } |