| /* |
| * Copyright (C) 2015 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 com.android.messaging.datamodel.media; |
| |
| import android.content.res.Resources; |
| import android.graphics.Bitmap; |
| import android.graphics.drawable.Drawable; |
| import android.media.ExifInterface; |
| import android.support.rastermill.FrameSequence; |
| import android.support.rastermill.FrameSequenceDrawable; |
| |
| import com.android.messaging.util.Assert; |
| import com.android.messaging.util.LogUtil; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| public class GifImageResource extends ImageResource { |
| private FrameSequence mFrameSequence; |
| |
| public GifImageResource(String key, FrameSequence frameSequence) { |
| // GIF does not support exif tags |
| super(key, ExifInterface.ORIENTATION_NORMAL); |
| mFrameSequence = frameSequence; |
| } |
| |
| public static GifImageResource createGifImageResource(String key, InputStream inputStream) { |
| final FrameSequence frameSequence; |
| try { |
| frameSequence = FrameSequence.decodeStream(inputStream); |
| } finally { |
| try { |
| inputStream.close(); |
| } catch (IOException e) { |
| // Nothing to do if we fail closing the stream |
| } |
| } |
| if (frameSequence == null) { |
| return null; |
| } |
| return new GifImageResource(key, frameSequence); |
| } |
| |
| @Override |
| public Drawable getDrawable(Resources resources) { |
| try { |
| return new FrameSequenceDrawable(mFrameSequence); |
| } catch (final Exception e) { |
| // Malicious gif images can make platform throw different kind of exceptions. Catch |
| // them all. |
| LogUtil.e(LogUtil.BUGLE_TAG, "Error getting drawable for GIF", e); |
| return null; |
| } |
| } |
| |
| @Override |
| public Bitmap getBitmap() { |
| Assert.fail("GetBitmap() should never be called on a gif."); |
| return null; |
| } |
| |
| @Override |
| public byte[] getBytes() { |
| Assert.fail("GetBytes() should never be called on a gif."); |
| return null; |
| } |
| |
| @Override |
| public Bitmap reuseBitmap() { |
| return null; |
| } |
| |
| @Override |
| public boolean supportsBitmapReuse() { |
| // FrameSequenceDrawable a.) takes two bitmaps and thus does not fit into the current |
| // bitmap pool architecture b.) will rarely use bitmaps from one FrameSequenceDrawable to |
| // the next that are the same sizes since they are used by attachments. |
| return false; |
| } |
| |
| @Override |
| public int getMediaSize() { |
| Assert.fail("GifImageResource should not be used by a media cache"); |
| // Only used by the media cache, which this does not use. |
| return 0; |
| } |
| |
| @Override |
| public boolean isCacheable() { |
| return false; |
| } |
| |
| @Override |
| protected void close() { |
| acquireLock(); |
| try { |
| if (mFrameSequence != null) { |
| mFrameSequence = null; |
| } |
| } finally { |
| releaseLock(); |
| } |
| } |
| |
| } |