>
</field>
</class>
+<class name="BitmapRegionDecoder"
+ extends="java.lang.Object"
+ abstract="false"
+ static="false"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<method name="decodeRegion"
+ return="android.graphics.Bitmap"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="rect" type="android.graphics.Rect">
+</parameter>
+<parameter name="options" type="android.graphics.BitmapFactory.Options">
+</parameter>
+</method>
+<method name="getHeight"
+ return="int"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</method>
+<method name="getWidth"
+ return="int"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</method>
+<method name="isRecycled"
+ return="boolean"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</method>
+<method name="newInstance"
+ return="android.graphics.BitmapRegionDecoder"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="true"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="data" type="byte[]">
+</parameter>
+<parameter name="offset" type="int">
+</parameter>
+<parameter name="length" type="int">
+</parameter>
+<parameter name="isShareable" type="boolean">
+</parameter>
+<exception name="IOException" type="java.io.IOException">
+</exception>
+</method>
+<method name="newInstance"
+ return="android.graphics.BitmapRegionDecoder"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="true"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="fd" type="java.io.FileDescriptor">
+</parameter>
+<parameter name="isShareable" type="boolean">
+</parameter>
+<exception name="IOException" type="java.io.IOException">
+</exception>
+</method>
+<method name="newInstance"
+ return="android.graphics.BitmapRegionDecoder"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="true"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="is" type="java.io.InputStream">
+</parameter>
+<parameter name="isShareable" type="boolean">
+</parameter>
+<exception name="IOException" type="java.io.IOException">
+</exception>
+</method>
+<method name="newInstance"
+ return="android.graphics.BitmapRegionDecoder"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="true"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+<parameter name="pathName" type="java.lang.String">
+</parameter>
+<parameter name="isShareable" type="boolean">
+</parameter>
+<exception name="IOException" type="java.io.IOException">
+</exception>
+</method>
+<method name="recycle"
+ return="void"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</method>
+</class>
<class name="BitmapShader"
extends="android.graphics.Shader"
abstract="false"
android_graphics_PixelFormat.cpp \
android/graphics/Picture.cpp \
android/graphics/PorterDuff.cpp \
- android/graphics/LargeBitmap.cpp \
+ android/graphics/BitmapRegionDecoder.cpp \
android/graphics/Rasterizer.cpp \
android/graphics/Region.cpp \
android/graphics/Shader.cpp \
android/graphics/Typeface.cpp \
+ android/graphics/Utils.cpp \
android/graphics/Xfermode.cpp \
android/graphics/YuvToJpegEncoder.cpp \
android_media_AudioRecord.cpp \
extern int register_android_os_Process(JNIEnv* env);
extern int register_android_graphics_Bitmap(JNIEnv*);
extern int register_android_graphics_BitmapFactory(JNIEnv*);
-extern int register_android_graphics_LargeBitmap(JNIEnv*);
+extern int register_android_graphics_BitmapRegionDecoder(JNIEnv*);
extern int register_android_graphics_Camera(JNIEnv* env);
extern int register_android_graphics_Graphics(JNIEnv* env);
extern int register_android_graphics_Interpolator(JNIEnv* env);
REG_JNI(register_android_graphics_Bitmap),
REG_JNI(register_android_graphics_BitmapFactory),
- REG_JNI(register_android_graphics_LargeBitmap),
+ REG_JNI(register_android_graphics_BitmapRegionDecoder),
REG_JNI(register_android_graphics_Camera),
REG_JNI(register_android_graphics_Canvas),
REG_JNI(register_android_graphics_ColorFilter),
#include "SkUtils.h"
#include "CreateJavaOutputStreamAdaptor.h"
#include "AutoDecodeCancel.h"
+#include "Utils.h"
#include <android_runtime/AndroidRuntime.h>
#include <utils/Asset.h>
}
};
-class AssetStreamAdaptor : public SkStream {
-public:
- AssetStreamAdaptor(Asset* a) : fAsset(a) {}
-
- virtual bool rewind() {
- off_t pos = fAsset->seek(0, SEEK_SET);
- if (pos == (off_t)-1) {
- SkDebugf("----- fAsset->seek(rewind) failed\n");
- return false;
- }
- return true;
- }
-
- virtual size_t read(void* buffer, size_t size) {
- ssize_t amount;
-
- if (NULL == buffer) {
- if (0 == size) { // caller is asking us for our total length
- return fAsset->getLength();
- }
- // asset->seek returns new total offset
- // we want to return amount that was skipped
-
- off_t oldOffset = fAsset->seek(0, SEEK_CUR);
- if (-1 == oldOffset) {
- SkDebugf("---- fAsset->seek(oldOffset) failed\n");
- return 0;
- }
- off_t newOffset = fAsset->seek(size, SEEK_CUR);
- if (-1 == newOffset) {
- SkDebugf("---- fAsset->seek(%d) failed\n", size);
- return 0;
- }
- amount = newOffset - oldOffset;
- } else {
- amount = fAsset->read(buffer, size);
- if (amount <= 0) {
- SkDebugf("---- fAsset->read(%d) returned %d\n", size, amount);
- }
- }
-
- if (amount < 0) {
- amount = 0;
- }
- return amount;
- }
-
-private:
- Asset* fAsset;
-};
-
///////////////////////////////////////////////////////////////////////////////
static inline int32_t validOrNeg1(bool isValid, int32_t value) {
!env->GetBooleanField(options, gOptions_nativeAllocFieldID);
}
-static jobject nullObjectReturn(const char msg[]) {
- if (msg) {
- SkDebugf("--- %s\n", msg);
- }
- return NULL;
-}
static SkPixelRef* installPixelRef(SkBitmap* bitmap, SkStream* stream,
int sampleSize, bool ditherImage) {
return size;
}
-/** Restore the file descriptor's offset in our destructor
- */
-class AutoFDSeek {
-public:
- AutoFDSeek(int fd) : fFD(fd) {
- fCurr = ::lseek(fd, 0, SEEK_CUR);
- }
- ~AutoFDSeek() {
- if (fCurr >= 0) {
- ::lseek(fFD, fCurr, SEEK_SET);
- }
- }
-private:
- int fFD;
- off_t fCurr;
-};
-
static jobject nativeDecodeFileDescriptor(JNIEnv* env, jobject clazz,
jobject fileDescriptor,
jobject padding,
}
}
-static SkMemoryStream* buildSkMemoryStream(SkStream *stream) {
- size_t bufferSize = 4096;
- size_t streamLen = 0;
- size_t len;
- char* data = (char*)sk_malloc_throw(bufferSize);
-
- while ((len = stream->read(data + streamLen,
- bufferSize - streamLen)) != 0) {
- streamLen += len;
- if (streamLen == bufferSize) {
- bufferSize *= 2;
- data = (char*)sk_realloc_throw(data, bufferSize);
- }
- }
- data = (char*)sk_realloc_throw(data, streamLen);
- SkMemoryStream* streamMem = new SkMemoryStream();
- streamMem->setMemoryOwned(data, streamLen);
- return streamMem;
-}
-
-static jobject doBuildTileIndex(JNIEnv* env, SkStream* 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, true);
- decoder->setAllocator(javaAllocator);
- JavaMemoryUsageReporter *javaMemoryReporter = new JavaMemoryUsageReporter(env);
- decoder->setReporter(javaMemoryReporter);
- javaAllocator->unref();
- javaMemoryReporter->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);
- return nullObjectReturn("decoder->buildTileIndex returned false");
- }
-
- SkLargeBitmap *bm = new SkLargeBitmap(decoder, width, height);
-
- return GraphicsJNI::createLargeBitmap(env, bm);
-}
-
-static jobject nativeCreateLargeBitmapFromByteArray(JNIEnv* env, jobject, jbyteArray byteArray,
- int offset, int 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);
- SkStream* stream = new SkMemoryStream(ar.ptr() + offset, length, true);
- return doBuildTileIndex(env, stream);
-}
-
-static jobject nativeCreateLargeBitmapFromFileDescriptor(JNIEnv* env, jobject clazz,
- jobject fileDescriptor, jboolean isShareable) {
- NPE_CHECK_RETURN_ZERO(env, fileDescriptor);
-
- jint descriptor = env->GetIntField(fileDescriptor,
- gFileDescriptor_descriptor);
- SkStream *stream = NULL;
- struct stat fdStat;
- int newFD;
- if (fstat(descriptor, &fdStat) == -1) {
- doThrowIOE(env, "broken file descriptor");
- return nullObjectReturn("fstat return -1");
- }
-
- if (isShareable &&
- S_ISREG(fdStat.st_mode) &&
- (newFD = ::dup(descriptor)) != -1) {
- SkFDStream* fdStream = new SkFDStream(newFD, true);
- if (!fdStream->isValid()) {
- fdStream->unref();
- return NULL;
- }
- stream = fdStream;
- } else {
- SkFDStream* fdStream = new SkFDStream(descriptor, false);
- if (!fdStream->isValid()) {
- fdStream->unref();
- return NULL;
- }
- stream = buildSkMemoryStream(fdStream);
- fdStream->unref();
- }
-
- /* Restore our offset when we leave, so we can be called more than once
- with the same descriptor. This is only required if we didn't dup the
- file descriptor, but it is OK to do it all the time.
- */
- AutoFDSeek as(descriptor);
-
- return doBuildTileIndex(env, stream);
-}
-
-static jobject nativeCreateLargeBitmapFromStream(JNIEnv* env, jobject clazz,
- jobject is, // InputStream
- jbyteArray storage, // byte[]
- jboolean isShareable) {
- jobject largeBitmap = NULL;
- SkStream* stream = CreateJavaInputStreamAdaptor(env, is, storage, 1024);
-
- if (stream) {
- // for now we don't allow shareable with java inputstreams
- SkMemoryStream *mStream = buildSkMemoryStream(stream);
- largeBitmap = doBuildTileIndex(env, mStream);
- stream->unref();
- }
- return largeBitmap;
-}
-
-static jobject nativeCreateLargeBitmapFromAsset(JNIEnv* env, jobject clazz,
- jint native_asset, // Asset
- jboolean isShareable) {
- SkStream* stream, *assStream;
- Asset* asset = reinterpret_cast<Asset*>(native_asset);
- assStream = new AssetStreamAdaptor(asset);
- stream = buildSkMemoryStream(assStream);
- assStream->unref();
- return doBuildTileIndex(env, stream);
-}
-
///////////////////////////////////////////////////////////////////////////////
static JNINativeMethod gMethods[] = {
},
{ "nativeSetDefaultConfig", "(I)V", (void*)nativeSetDefaultConfig },
-
- { "nativeCreateLargeBitmap",
- "([BIIZ)Landroid/graphics/LargeBitmap;",
- (void*)nativeCreateLargeBitmapFromByteArray
- },
-
- { "nativeCreateLargeBitmap",
- "(Ljava/io/InputStream;[BZ)Landroid/graphics/LargeBitmap;",
- (void*)nativeCreateLargeBitmapFromStream
- },
-
- { "nativeCreateLargeBitmap",
- "(Ljava/io/FileDescriptor;Z)Landroid/graphics/LargeBitmap;",
- (void*)nativeCreateLargeBitmapFromFileDescriptor
- },
-
- { "nativeCreateLargeBitmap",
- "(IZ)Landroid/graphics/LargeBitmap;",
- (void*)nativeCreateLargeBitmapFromAsset
- },
};
static JNINativeMethod gOptionsMethods[] = {
--- /dev/null
+/*
+ * 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 "SkImageEncoder.h"
+#include "GraphicsJNI.h"
+#include "SkUtils.h"
+#include "SkTemplates.h"
+#include "SkPixelRef.h"
+#include "SkStream.h"
+#include "BitmapFactory.h"
+#include "AutoDecodeCancel.h"
+#include "SkBitmapRegionDecoder.h"
+#include "CreateJavaOutputStreamAdaptor.h"
+#include "Utils.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 <utils/Asset.h>
+#include <sys/stat.h>
+
+static jclass gFileDescriptor_class;
+static jfieldID gFileDescriptor_descriptor;
+
+#if 0
+ #define TRACE_BITMAP(code) code
+#else
+ #define TRACE_BITMAP(code)
+#endif
+
+using namespace android;
+
+static SkMemoryStream* buildSkMemoryStream(SkStream *stream) {
+ size_t bufferSize = 4096;
+ size_t streamLen = 0;
+ size_t len;
+ char* data = (char*)sk_malloc_throw(bufferSize);
+
+ while ((len = stream->read(data + streamLen,
+ bufferSize - streamLen)) != 0) {
+ streamLen += len;
+ if (streamLen == bufferSize) {
+ bufferSize *= 2;
+ data = (char*)sk_realloc_throw(data, bufferSize);
+ }
+ }
+ data = (char*)sk_realloc_throw(data, streamLen);
+ SkMemoryStream* streamMem = new SkMemoryStream();
+ streamMem->setMemoryOwned(data, streamLen);
+ return streamMem;
+}
+
+static jobject doBuildTileIndex(JNIEnv* env, SkStream* 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, true);
+ decoder->setAllocator(javaAllocator);
+ JavaMemoryUsageReporter *javaMemoryReporter = new JavaMemoryUsageReporter(env);
+ decoder->setReporter(javaMemoryReporter);
+ javaAllocator->unref();
+ javaMemoryReporter->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);
+ 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,
+ int offset, int 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);
+ SkStream* stream = new SkMemoryStream(ar.ptr() + offset, length, true);
+ return doBuildTileIndex(env, stream);
+}
+
+static jobject nativeNewInstanceFromFileDescriptor(JNIEnv* env, jobject clazz,
+ jobject fileDescriptor, jboolean isShareable) {
+ NPE_CHECK_RETURN_ZERO(env, fileDescriptor);
+
+ jint descriptor = env->GetIntField(fileDescriptor,
+ gFileDescriptor_descriptor);
+ SkStream *stream = NULL;
+ struct stat fdStat;
+ int newFD;
+ if (fstat(descriptor, &fdStat) == -1) {
+ doThrowIOE(env, "broken file descriptor");
+ return nullObjectReturn("fstat return -1");
+ }
+
+ if (isShareable &&
+ S_ISREG(fdStat.st_mode) &&
+ (newFD = ::dup(descriptor)) != -1) {
+ SkFDStream* fdStream = new SkFDStream(newFD, true);
+ if (!fdStream->isValid()) {
+ fdStream->unref();
+ return NULL;
+ }
+ stream = fdStream;
+ } else {
+ SkFDStream* fdStream = new SkFDStream(descriptor, false);
+ if (!fdStream->isValid()) {
+ fdStream->unref();
+ return NULL;
+ }
+ stream = buildSkMemoryStream(fdStream);
+ fdStream->unref();
+ }
+
+ /* Restore our offset when we leave, so we can be called more than once
+ with the same descriptor. This is only required if we didn't dup the
+ file descriptor, but it is OK to do it all the time.
+ */
+ AutoFDSeek as(descriptor);
+
+ return doBuildTileIndex(env, stream);
+}
+
+static jobject nativeNewInstanceFromStream(JNIEnv* env, jobject clazz,
+ jobject is, // InputStream
+ jbyteArray storage, // byte[]
+ jboolean isShareable) {
+ jobject largeBitmap = NULL;
+ SkStream* stream = CreateJavaInputStreamAdaptor(env, is, storage, 1024);
+
+ if (stream) {
+ // for now we don't allow shareable with java inputstreams
+ SkMemoryStream *mStream = buildSkMemoryStream(stream);
+ largeBitmap = doBuildTileIndex(env, mStream);
+ stream->unref();
+ }
+ return largeBitmap;
+}
+
+static jobject nativeNewInstanceFromAsset(JNIEnv* env, jobject clazz,
+ jint native_asset, // Asset
+ jboolean isShareable) {
+ SkStream* stream, *assStream;
+ Asset* asset = reinterpret_cast<Asset*>(native_asset);
+ assStream = new AssetStreamAdaptor(asset);
+ stream = buildSkMemoryStream(assStream);
+ assStream->unref();
+ return doBuildTileIndex(env, stream);
+}
+
+/*
+ * nine patch not supported
+ *
+ * purgeable not supported
+ * reportSizeToVM not supported
+ */
+static jobject nativeDecodeRegion(JNIEnv* env, jobject, SkBitmapRegionDecoder *brd,
+ int start_x, int start_y, int width, int height, jobject options) {
+ SkImageDecoder *decoder = brd->getDecoder();
+ int sampleSize = 1;
+ SkBitmap::Config prefConfig = SkBitmap::kNo_Config;
+ bool doDither = true;
+
+ 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);
+ prefConfig = GraphicsJNI::getNativeBitmapConfig(env, jconfig);
+ doDither = env->GetBooleanField(options, gOptions_ditherFieldID);
+ }
+
+ decoder->setDitherImage(doDither);
+ SkBitmap* bitmap = new SkBitmap;
+ SkAutoTDelete<SkBitmap> adb(bitmap);
+ 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;
+
+ if (!brd->decodeRegion(bitmap, region, prefConfig, 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()));
+ }
+
+ // detach bitmap from its autotdeleter, since we want to own it now
+ adb.detach();
+
+ SkPixelRef* pr;
+ pr = bitmap->pixelRef();
+ // promise we will never change our pixels (great for sharing and pictures)
+ pr->setImmutable();
+ // now create the java bitmap
+ return GraphicsJNI::createBitmap(env, bitmap, false, NULL);
+}
+
+static int nativeGetHeight(JNIEnv* env, jobject, SkBitmapRegionDecoder *brd) {
+ return brd->getHeight();
+}
+
+static int nativeGetWidth(JNIEnv* env, jobject, SkBitmapRegionDecoder *brd) {
+ return brd->getWidth();
+}
+
+static void nativeClean(JNIEnv* env, jobject, SkBitmapRegionDecoder *brd) {
+ delete brd;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+#include <android_runtime/AndroidRuntime.h>
+
+static JNINativeMethod gBitmapRegionDecoderMethods[] = {
+ { "nativeDecodeRegion",
+ "(IIIIILandroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;",
+ (void*)nativeDecodeRegion},
+
+ { "nativeGetHeight", "(I)I", (void*)nativeGetHeight},
+
+ { "nativeGetWidth", "(I)I", (void*)nativeGetWidth},
+
+ { "nativeClean", "(I)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",
+ "(IZ)Landroid/graphics/BitmapRegionDecoder;",
+ (void*)nativeNewInstanceFromAsset
+ },
+};
+
+#define kClassPathName "android/graphics/BitmapRegionDecoder"
+
+int register_android_graphics_BitmapRegionDecoder(JNIEnv* env);
+int register_android_graphics_BitmapRegionDecoder(JNIEnv* env)
+{
+ return android::AndroidRuntime::registerNativeMethods(env, kClassPathName,
+ gBitmapRegionDecoderMethods, SK_ARRAY_COUNT(gBitmapRegionDecoderMethods));
+}
static jclass gBitmapConfig_class;
static jfieldID gBitmapConfig_nativeInstanceID;
-static jclass gLargeBitmap_class;
-static jmethodID gLargeBitmap_constructorMethodID;
+static jclass gBitmapRegionDecoder_class;
+static jmethodID gBitmapRegionDecoder_constructorMethodID;
static jclass gCanvas_class;
static jfieldID gCanvas_nativeInstanceID;
}
return obj;
}
-jobject GraphicsJNI::createLargeBitmap(JNIEnv* env, SkLargeBitmap* bitmap)
+
+jobject GraphicsJNI::createBitmapRegionDecoder(JNIEnv* env, SkBitmapRegionDecoder* bitmap)
{
SkASSERT(bitmap != NULL);
- jobject obj = env->AllocObject(gLargeBitmap_class);
+ jobject obj = env->AllocObject(gBitmapRegionDecoder_class);
if (hasException(env)) {
obj = NULL;
return obj;
}
if (obj) {
- env->CallVoidMethod(obj, gLargeBitmap_constructorMethodID, (jint)bitmap);
+ env->CallVoidMethod(obj, gBitmapRegionDecoder_constructorMethodID, (jint)bitmap);
if (hasException(env)) {
obj = NULL;
}
gBitmap_constructorMethodID = env->GetMethodID(gBitmap_class, "<init>",
"(IZ[BI)V");
- gLargeBitmap_class = make_globalref(env, "android/graphics/LargeBitmap");
- gLargeBitmap_constructorMethodID = env->GetMethodID(gLargeBitmap_class, "<init>", "(I)V");
+ gBitmapRegionDecoder_class = make_globalref(env, "android/graphics/BitmapRegionDecoder");
+ gBitmapRegionDecoder_constructorMethodID = env->GetMethodID(gBitmapRegionDecoder_class, "<init>", "(I)V");
gBitmapConfig_class = make_globalref(env, "android/graphics/Bitmap$Config");
gBitmapConfig_nativeInstanceID = getFieldIDCheck(env, gBitmapConfig_class,
return 0;
}
-
#include "SkPoint.h"
#include "SkRect.h"
#include "SkBitmap.h"
-#include "../images/SkLargeBitmap.h"
+#include "../images/SkBitmapRegionDecoder.h"
#include "../images/SkImageDecoder.h"
#include <jni.h>
static jobject createRegion(JNIEnv* env, SkRegion* region);
- static jobject createLargeBitmap(JNIEnv* env, SkLargeBitmap* bitmap);
+ static jobject createBitmapRegionDecoder(JNIEnv* env, SkBitmapRegionDecoder* bitmap);
/** Set a pixelref for the bitmap (needs setConfig to already be called)
Returns true on success. If it returns false, then it failed, and the
do { if (NULL == (object)) { doThrowNPE(env); return; } } while (0)
#endif
-
+++ /dev/null
-#define LOG_TAG "LargeBitmap"
-
-#include "SkBitmap.h"
-#include "SkImageEncoder.h"
-#include "SkColorPriv.h"
-#include "GraphicsJNI.h"
-#include "SkDither.h"
-#include "SkUnPreMultiply.h"
-#include "SkUtils.h"
-#include "SkTemplates.h"
-#include "SkPixelRef.h"
-#include "BitmapFactory.h"
-#include "AutoDecodeCancel.h"
-#include "SkLargeBitmap.h"
-
-#include <binder/Parcel.h>
-#include "android_util_Binder.h"
-#include "android_nio_utils.h"
-#include "CreateJavaOutputStreamAdaptor.h"
-
-#include <jni.h>
-
-#if 0
- #define TRACE_BITMAP(code) code
-#else
- #define TRACE_BITMAP(code)
-#endif
-
-static jobject nullObjectReturn(const char msg[]) {
- if (msg) {
- SkDebugf("--- %s\n", msg);
- }
- return NULL;
-}
-
-/*
- * nine patch not supported
- *
- * purgeable not supported
- * reportSizeToVM not supported
- */
-static jobject nativeDecodeRegion(JNIEnv* env, jobject, SkLargeBitmap *bm,
- int start_x, int start_y, int width, int height, jobject options) {
- SkImageDecoder *decoder = bm->getDecoder();
- int sampleSize = 1;
- SkBitmap::Config prefConfig = SkBitmap::kNo_Config;
- bool doDither = true;
-
- 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);
- prefConfig = GraphicsJNI::getNativeBitmapConfig(env, jconfig);
- doDither = env->GetBooleanField(options, gOptions_ditherFieldID);
- }
-
- decoder->setDitherImage(doDither);
- SkBitmap* bitmap = new SkBitmap;
- SkAutoTDelete<SkBitmap> adb(bitmap);
- 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;
-
- if (!bm->decodeRegion(bitmap, region, prefConfig, 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()));
- }
-
- // detach bitmap from its autotdeleter, since we want to own it now
- adb.detach();
-
- SkPixelRef* pr;
- pr = bitmap->pixelRef();
- // promise we will never change our pixels (great for sharing and pictures)
- pr->setImmutable();
- // now create the java bitmap
- return GraphicsJNI::createBitmap(env, bitmap, false, NULL);
-}
-
-static int nativeGetHeight(JNIEnv* env, jobject, SkLargeBitmap *bm) {
- return bm->getHeight();
-}
-
-static int nativeGetWidth(JNIEnv* env, jobject, SkLargeBitmap *bm) {
- return bm->getWidth();
-}
-
-static void nativeClean(JNIEnv* env, jobject, SkLargeBitmap *bm) {
- delete bm;
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-#include <android_runtime/AndroidRuntime.h>
-
-static JNINativeMethod gLargeBitmapMethods[] = {
- { "nativeDecodeRegion",
- "(IIIIILandroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;",
- (void*)nativeDecodeRegion},
- { "nativeGetHeight", "(I)I", (void*)nativeGetHeight},
- { "nativeGetWidth", "(I)I", (void*)nativeGetWidth},
- { "nativeClean", "(I)V", (void*)nativeClean},
-};
-
-#define kClassPathName "android/graphics/LargeBitmap"
-
-int register_android_graphics_LargeBitmap(JNIEnv* env);
-int register_android_graphics_LargeBitmap(JNIEnv* env)
-{
- return android::AndroidRuntime::registerNativeMethods(env, kClassPathName,
- gLargeBitmapMethods, SK_ARRAY_COUNT(gLargeBitmapMethods));
-}
-
--- /dev/null
+/*
+ * 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.
+ */
+
+#include "Utils.h"
+#include "SkUtils.h"
+
+using namespace android;
+
+bool AssetStreamAdaptor::rewind() {
+ off_t pos = fAsset->seek(0, SEEK_SET);
+ if (pos == (off_t)-1) {
+ SkDebugf("----- fAsset->seek(rewind) failed\n");
+ return false;
+ }
+ return true;
+}
+
+size_t AssetStreamAdaptor::read(void* buffer, size_t size) {
+ ssize_t amount;
+
+ if (NULL == buffer) {
+ if (0 == size) { // caller is asking us for our total length
+ return fAsset->getLength();
+ }
+ // asset->seek returns new total offset
+ // we want to return amount that was skipped
+
+ off_t oldOffset = fAsset->seek(0, SEEK_CUR);
+ if (-1 == oldOffset) {
+ SkDebugf("---- fAsset->seek(oldOffset) failed\n");
+ return 0;
+ }
+ off_t newOffset = fAsset->seek(size, SEEK_CUR);
+ if (-1 == newOffset) {
+ SkDebugf("---- fAsset->seek(%d) failed\n", size);
+ return 0;
+ }
+ amount = newOffset - oldOffset;
+ } else {
+ amount = fAsset->read(buffer, size);
+ if (amount <= 0) {
+ SkDebugf("---- fAsset->read(%d) returned %d\n", size, amount);
+ }
+ }
+
+ if (amount < 0) {
+ amount = 0;
+ }
+ return amount;
+}
+
+jobject android::nullObjectReturn(const char msg[]) {
+ if (msg) {
+ SkDebugf("--- %s\n", msg);
+ }
+ return NULL;
+}
--- /dev/null
+/*
+ * Copyright (C) 2006 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.
+ */
+
+#ifndef UTILS_DEFINED
+#define UTILS_DEFINED
+
+#include "SkStream.h"
+
+#include "android_util_Binder.h"
+
+#include <jni.h>
+#include <utils/Asset.h>
+
+namespace android {
+
+class AssetStreamAdaptor : public SkStream {
+public:
+ AssetStreamAdaptor(Asset* a) : fAsset(a) {}
+ virtual bool rewind();
+ virtual size_t read(void* buffer, size_t size);
+
+private:
+ Asset* fAsset;
+};
+
+
+/** Restore the file descriptor's offset in our destructor
+ */
+class AutoFDSeek {
+public:
+ AutoFDSeek(int fd) : fFD(fd) {
+ fCurr = ::lseek(fd, 0, SEEK_CUR);
+ }
+ ~AutoFDSeek() {
+ if (fCurr >= 0) {
+ ::lseek(fFD, fCurr, SEEK_SET);
+ }
+ }
+private:
+ int fFD;
+ off_t fCurr;
+};
+
+jobject nullObjectReturn(const char msg[]);
+
+}; // namespace android
+
+#endif
nativeSetDefaultConfig(config.nativeInt);
}
- /**
- * Create a LargeBitmap from the specified byte array.
- * Currently only the Jpeg format is supported.
- *
- * @param data byte array of compressed image data.
- * @param offset offset into data for where the decoder should begin
- * parsing.
- * @param length the number of bytes, beginning at offset, to parse
- * @param isShareable If this is true, then the LargeBitmap may keep a
- * shallow reference to the input. If this is false,
- * then the LargeBitmap will explicitly make a copy of the
- * input data, and keep that. Even if sharing is allowed,
- * the implementation may still decide to make a deep
- * copy of the input data. If an image is progressively encoded,
- * allowing sharing may degrade the decoding speed.
- * @return LargeBitmap, or null if the image data could not be decoded.
- * @throws IOException if the image format is not supported or can not be decoded.
- * @hide
- */
- public static LargeBitmap createLargeBitmap(byte[] data,
- int offset, int length, boolean isShareable) throws IOException {
- if ((offset | length) < 0 || data.length < offset + length) {
- throw new ArrayIndexOutOfBoundsException();
- }
- return nativeCreateLargeBitmap(data, offset, length, isShareable);
- }
-
- /**
- * Create a LargeBitmap from the file descriptor.
- * The position within the descriptor will not be changed when
- * this returns, so the descriptor can be used again as is.
- * Currently only the Jpeg format is supported.
- *
- * @param fd The file descriptor containing the data to decode
- * @param isShareable If this is true, then the LargeBitmap may keep a
- * shallow reference to the input. If this is false,
- * then the LargeBitmap will explicitly make a copy of the
- * input data, and keep that. Even if sharing is allowed,
- * the implementation may still decide to make a deep
- * copy of the input data. If an image is progressively encoded,
- * allowing sharing may degrade the decoding speed.
- * @return LargeBitmap, or null if the image data could not be decoded.
- * @throws IOException if the image format is not supported or can not be decoded.
- * @hide
- */
- public static LargeBitmap createLargeBitmap(
- FileDescriptor fd, boolean isShareable) throws IOException {
- return nativeCreateLargeBitmap(fd, isShareable);
- }
-
- /**
- * Create a LargeBitmap from an input stream.
- * The stream's position will be where ever it was after the encoded data
- * was read.
- * Currently only the Jpeg format is supported.
- *
- * @param is The input stream that holds the raw data to be decoded into a
- * LargeBitmap.
- * @param isShareable If this is true, then the LargeBitmap may keep a
- * shallow reference to the input. If this is false,
- * then the LargeBitmap will explicitly make a copy of the
- * input data, and keep that. Even if sharing is allowed,
- * the implementation may still decide to make a deep
- * copy of the input data. If an image is progressively encoded,
- * allowing sharing may degrade the decoding speed.
- * @return LargeBitmap, or null if the image data could not be decoded.
- * @throws IOException if the image format is not supported or can not be decoded.
- * @hide
- */
- public static LargeBitmap createLargeBitmap(InputStream is,
- boolean isShareable) throws IOException {
- // we need mark/reset to work properly in JNI
-
- if (!is.markSupported()) {
- is = new BufferedInputStream(is, 16 * 1024);
- }
-
- if (is instanceof AssetManager.AssetInputStream) {
- return nativeCreateLargeBitmap(
- ((AssetManager.AssetInputStream) is).getAssetInt(),
- isShareable);
- } else {
- // pass some temp storage down to the native code. 1024 is made up,
- // but should be large enough to avoid too many small calls back
- // into is.read(...).
- byte [] tempStorage = new byte[16 * 1024];
- return nativeCreateLargeBitmap(is, tempStorage, isShareable);
- }
- }
-
- /**
- * Create a LargeBitmap from a file path.
- * Currently only the Jpeg format is supported.
- *
- * @param pathName complete path name for the file to be decoded.
- * @param isShareable If this is true, then the LargeBitmap may keep a
- * shallow reference to the input. If this is false,
- * then the LargeBitmap will explicitly make a copy of the
- * input data, and keep that. Even if sharing is allowed,
- * the implementation may still decide to make a deep
- * copy of the input data. If an image is progressively encoded,
- * allowing sharing may degrade the decoding speed.
- * @return LargeBitmap, or null if the image data could not be decoded.
- * @throws IOException if the image format is not supported or can not be decoded.
- * @hide
- */
- public static LargeBitmap createLargeBitmap(String pathName, boolean isShareable)
- throws IOException {
- LargeBitmap bm = null;
- InputStream stream = null;
-
- try {
- stream = new FileInputStream(pathName);
- bm = createLargeBitmap(stream, isShareable);
- } finally {
- if (stream != null) {
- try {
- stream.close();
- } catch (IOException e) {
- // do nothing here
- }
- }
- }
- return bm;
- }
-
private static native void nativeSetDefaultConfig(int nativeConfig);
private static native Bitmap nativeDecodeStream(InputStream is, byte[] storage,
Rect padding, Options opts);
private static native Bitmap nativeDecodeByteArray(byte[] data, int offset,
int length, Options opts);
private static native byte[] nativeScaleNinePatch(byte[] chunk, float scale, Rect pad);
-
- private static native LargeBitmap nativeCreateLargeBitmap(
- byte[] data, int offset, int length, boolean isShareable);
- private static native LargeBitmap nativeCreateLargeBitmap(
- FileDescriptor fd, boolean isShareable);
- private static native LargeBitmap nativeCreateLargeBitmap(
- InputStream is, byte[] storage, boolean isShareable);
- private static native LargeBitmap nativeCreateLargeBitmap(
- int asset, boolean isShareable);
}
-
--- /dev/null
+/* 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.
+ */
+
+package android.graphics;
+
+import android.content.res.AssetManager;
+
+import java.io.BufferedInputStream;
+import java.io.FileDescriptor;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+/**
+ * BitmapRegionDecoder can be used to decode a rectangle region from an image.
+ * BitmapRegionDecoder is particularly useful when an original image is large and
+ * you only need parts of the image.
+ *
+ * <p>To create a BitmapRegionDecoder, call newInstance(...).
+ * Given a BitmapRegionDecoder, users can call decodeRegion() repeatedly
+ * to get a decoded Bitmap of the specified region.
+ *
+ */
+public final class BitmapRegionDecoder {
+ private int mNativeBitmapRegionDecoder;
+ private boolean mRecycled;
+
+ /**
+ * Create a BitmapRegionDecoder from the specified byte array.
+ * Currently only the Jpeg format is supported.
+ *
+ * @param data byte array of compressed image data.
+ * @param offset offset into data for where the decoder should begin
+ * parsing.
+ * @param length the number of bytes, beginning at offset, to parse
+ * @param isShareable If this is true, then the BitmapRegionDecoder may keep a
+ * shallow reference to the input. If this is false,
+ * then the BitmapRegionDecoder will explicitly make a copy of the
+ * input data, and keep that. Even if sharing is allowed,
+ * the implementation may still decide to make a deep
+ * copy of the input data. If an image is progressively encoded,
+ * allowing sharing may degrade the decoding speed.
+ * @return BitmapRegionDecoder, or null if the image data could not be decoded.
+ * @throws IOException if the image format is not supported or can not be decoded.
+ */
+ public static BitmapRegionDecoder newInstance(byte[] data,
+ int offset, int length, boolean isShareable) throws IOException {
+ if ((offset | length) < 0 || data.length < offset + length) {
+ throw new ArrayIndexOutOfBoundsException();
+ }
+ return nativeNewInstance(data, offset, length, isShareable);
+ }
+
+ /**
+ * Create a BitmapRegionDecoder from the file descriptor.
+ * The position within the descriptor will not be changed when
+ * this returns, so the descriptor can be used again as is.
+ * Currently only the Jpeg format is supported.
+ *
+ * @param fd The file descriptor containing the data to decode
+ * @param isShareable If this is true, then the BitmapRegionDecoder may keep a
+ * shallow reference to the input. If this is false,
+ * then the BitmapRegionDecoder will explicitly make a copy of the
+ * input data, and keep that. Even if sharing is allowed,
+ * the implementation may still decide to make a deep
+ * copy of the input data. If an image is progressively encoded,
+ * allowing sharing may degrade the decoding speed.
+ * @return BitmapRegionDecoder, or null if the image data could not be decoded.
+ * @throws IOException if the image format is not supported or can not be decoded.
+ */
+ public static BitmapRegionDecoder newInstance(
+ FileDescriptor fd, boolean isShareable) throws IOException {
+ return nativeNewInstance(fd, isShareable);
+ }
+
+ /**
+ * Create a BitmapRegionDecoder from an input stream.
+ * The stream's position will be where ever it was after the encoded data
+ * was read.
+ * Currently only the Jpeg format is supported.
+ *
+ * @param is The input stream that holds the raw data to be decoded into a
+ * BitmapRegionDecoder.
+ * @param isShareable If this is true, then the BitmapRegionDecoder may keep a
+ * shallow reference to the input. If this is false,
+ * then the BitmapRegionDecoder will explicitly make a copy of the
+ * input data, and keep that. Even if sharing is allowed,
+ * the implementation may still decide to make a deep
+ * copy of the input data. If an image is progressively encoded,
+ * allowing sharing may degrade the decoding speed.
+ * @return BitmapRegionDecoder, or null if the image data could not be decoded.
+ * @throws IOException if the image format is not supported or can not be decoded.
+ */
+ public static BitmapRegionDecoder newInstance(InputStream is,
+ boolean isShareable) throws IOException {
+ // we need mark/reset to work properly in JNI
+
+ if (!is.markSupported()) {
+ is = new BufferedInputStream(is, 16 * 1024);
+ }
+
+ if (is instanceof AssetManager.AssetInputStream) {
+ return nativeNewInstance(
+ ((AssetManager.AssetInputStream) is).getAssetInt(),
+ isShareable);
+ } else {
+ // pass some temp storage down to the native code. 1024 is made up,
+ // but should be large enough to avoid too many small calls back
+ // into is.read(...).
+ byte [] tempStorage = new byte[16 * 1024];
+ return nativeNewInstance(is, tempStorage, isShareable);
+ }
+ }
+
+ /**
+ * Create a BitmapRegionDecoder from a file path.
+ * Currently only the Jpeg format is supported.
+ *
+ * @param pathName complete path name for the file to be decoded.
+ * @param isShareable If this is true, then the BitmapRegionDecoder may keep a
+ * shallow reference to the input. If this is false,
+ * then the BitmapRegionDecoder will explicitly make a copy of the
+ * input data, and keep that. Even if sharing is allowed,
+ * the implementation may still decide to make a deep
+ * copy of the input data. If an image is progressively encoded,
+ * allowing sharing may degrade the decoding speed.
+ * @return BitmapRegionDecoder, or null if the image data could not be decoded.
+ * @throws IOException if the image format is not supported or can not be decoded.
+ */
+ public static BitmapRegionDecoder newInstance(String pathName,
+ boolean isShareable) throws IOException {
+ BitmapRegionDecoder decoder = null;
+ InputStream stream = null;
+
+ try {
+ stream = new FileInputStream(pathName);
+ decoder = newInstance(stream, isShareable);
+ } finally {
+ if (stream != null) {
+ try {
+ stream.close();
+ } catch (IOException e) {
+ // do nothing here
+ }
+ }
+ }
+ return decoder;
+ }
+
+ /* Private constructor that must receive an already allocated native
+ region decoder int (pointer).
+
+ This can be called from JNI code.
+ */
+ private BitmapRegionDecoder(int decoder) {
+ mNativeBitmapRegionDecoder = decoder;
+ mRecycled = false;
+ }
+
+ /**
+ * Decodes a rectangle region in the image specified by rect.
+ *
+ * @param rect The rectangle that specified the region to be decode.
+ * @param options null-ok; Options that control downsampling.
+ * inPurgeable is not supported.
+ * @return The decoded bitmap, or null if the image data could not be
+ * decoded.
+ */
+ public Bitmap decodeRegion(Rect rect, BitmapFactory.Options options) {
+ checkRecycled("decodeRegion called on recycled region decoder");
+ if (rect.left < 0 || rect.top < 0 || rect.right > getWidth()
+ || rect.bottom > getHeight())
+ throw new IllegalArgumentException("rectangle is not inside the image");
+ return nativeDecodeRegion(mNativeBitmapRegionDecoder, rect.left, rect.top,
+ rect.right - rect.left, rect.bottom - rect.top, options);
+ }
+
+ /** Returns the original image's width */
+ public int getWidth() {
+ checkRecycled("getWidth called on recycled region decoder");
+ return nativeGetWidth(mNativeBitmapRegionDecoder);
+ }
+
+ /** Returns the original image's height */
+ public int getHeight() {
+ checkRecycled("getHeight called on recycled region decoder");
+ return nativeGetHeight(mNativeBitmapRegionDecoder);
+ }
+
+ /**
+ * Frees up the memory associated with this region decoder, and mark the
+ * region decoder as "dead", meaning it will throw an exception if decodeRegion(),
+ * getWidth() or getHeight() is called.
+ *
+ * <p>This operation cannot be reversed, so it should only be called if you are
+ * sure there are no further uses for the region decoder. This is an advanced call,
+ * and normally need not be called, since the normal GC process will free up this
+ * memory when there are no more references to this region decoder.
+ */
+ public void recycle() {
+ if (!mRecycled) {
+ nativeClean(mNativeBitmapRegionDecoder);
+ mRecycled = true;
+ }
+ }
+
+ /**
+ * Returns true if this region decoder has been recycled.
+ * If so, then it is an error to try use its method.
+ *
+ * @return true if the region decoder has been recycled
+ */
+ public final boolean isRecycled() {
+ return mRecycled;
+ }
+
+ /**
+ * Called by methods that want to throw an exception if the region decoder
+ * has already been recycled.
+ */
+ private void checkRecycled(String errorMessage) {
+ if (mRecycled) {
+ throw new IllegalStateException(errorMessage);
+ }
+ }
+
+ @Override
+ protected void finalize() throws Throwable {
+ try {
+ recycle();
+ } finally {
+ super.finalize();
+ }
+ }
+
+ private static native Bitmap nativeDecodeRegion(int lbm,
+ int start_x, int start_y, int width, int height,
+ BitmapFactory.Options options);
+ private static native int nativeGetWidth(int lbm);
+ private static native int nativeGetHeight(int lbm);
+ private static native void nativeClean(int lbm);
+
+ private static native BitmapRegionDecoder nativeNewInstance(
+ byte[] data, int offset, int length, boolean isShareable);
+ private static native BitmapRegionDecoder nativeNewInstance(
+ FileDescriptor fd, boolean isShareable);
+ private static native BitmapRegionDecoder nativeNewInstance(
+ InputStream is, byte[] storage, boolean isShareable);
+ private static native BitmapRegionDecoder nativeNewInstance(
+ int asset, boolean isShareable);
+}
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