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authorWei-Ta Chen <weita@google.com>2010-09-30 16:31:38 -0700
committerWei-Ta Chen <weita@google.com>2010-10-01 12:16:38 -0700
commitf7681f84918c27f6a626681ce37ed2a236c44e82 (patch)
treef5240cc798f23a57561f60e8a7c1be3bf143ba7e /graphics
parente619a9da44e4c00f9034917aef67f86da0bc207f (diff)
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Do not merge.
Fix 3052285 by not publishing the BitmapRegionDecoder API until the honeycomb release. Bug: 3052285 Change-Id: Ie339e414c1a5581e1d38684621e0e97162616977
Diffstat (limited to 'graphics')
-rw-r--r--graphics/java/android/graphics/BitmapRegionDecoder.java263
1 files changed, 0 insertions, 263 deletions
diff --git a/graphics/java/android/graphics/BitmapRegionDecoder.java b/graphics/java/android/graphics/BitmapRegionDecoder.java
deleted file mode 100644
index 454eb4a..0000000
--- a/graphics/java/android/graphics/BitmapRegionDecoder.java
+++ /dev/null
@@ -1,263 +0,0 @@
-/* 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);
-}