1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.messaging.datamodel.media; 17 18 import android.content.res.Resources; 19 import android.graphics.Bitmap; 20 import android.graphics.drawable.Drawable; 21 import android.media.ExifInterface; 22 import android.support.rastermill.FrameSequence; 23 import android.support.rastermill.FrameSequenceDrawable; 24 25 import com.android.messaging.util.Assert; 26 27 import java.io.IOException; 28 import java.io.InputStream; 29 30 public class GifImageResource extends ImageResource { 31 private FrameSequence mFrameSequence; 32 33 public GifImageResource(String key, FrameSequence frameSequence) { 34 // GIF does not support exif tags 35 super(key, ExifInterface.ORIENTATION_NORMAL); 36 mFrameSequence = frameSequence; 37 } 38 39 public static GifImageResource createGifImageResource(String key, InputStream inputStream) { 40 final FrameSequence frameSequence; 41 try { 42 frameSequence = FrameSequence.decodeStream(inputStream); 43 } finally { 44 try { 45 inputStream.close(); 46 } catch (IOException e) { 47 // Nothing to do if we fail closing the stream 48 } 49 } 50 if (frameSequence == null) { 51 return null; 52 } 53 return new GifImageResource(key, frameSequence); 54 } 55 56 @Override 57 public Drawable getDrawable(Resources resources) { 58 return new FrameSequenceDrawable(mFrameSequence); 59 } 60 61 @Override 62 public Bitmap getBitmap() { 63 Assert.fail("GetBitmap() should never be called on a gif."); 64 return null; 65 } 66 67 @Override 68 public byte[] getBytes() { 69 Assert.fail("GetBytes() should never be called on a gif."); 70 return null; 71 } 72 73 @Override 74 public Bitmap reuseBitmap() { 75 return null; 76 } 77 78 @Override 79 public boolean supportsBitmapReuse() { 80 // FrameSequenceDrawable a.) takes two bitmaps and thus does not fit into the current 81 // bitmap pool architecture b.) will rarely use bitmaps from one FrameSequenceDrawable to 82 // the next that are the same sizes since they are used by attachments. 83 return false; 84 } 85 86 @Override 87 public int getMediaSize() { 88 Assert.fail("GifImageResource should not be used by a media cache"); 89 // Only used by the media cache, which this does not use. 90 return 0; 91 } 92 93 @Override 94 public boolean isCacheable() { 95 return false; 96 } 97 98 @Override 99 protected void close() { 100 acquireLock(); 101 try { 102 if (mFrameSequence != null) { 103 mFrameSequence = null; 104 } 105 } finally { 106 releaseLock(); 107 } 108 } 109 110 } 111
