Mike Dodd | d3b009a | 2015-08-11 11:16:59 -0700 | [diff] [blame] | 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; |
Tom Taylor | e4e1199 | 2017-06-20 14:26:43 -0700 | [diff] [blame] | 26 | import com.android.messaging.util.LogUtil; |
Mike Dodd | d3b009a | 2015-08-11 11:16:59 -0700 | [diff] [blame] | 27 | |
| 28 | import java.io.IOException; |
| 29 | import java.io.InputStream; |
| 30 | |
| 31 | public class GifImageResource extends ImageResource { |
| 32 | private FrameSequence mFrameSequence; |
| 33 | |
| 34 | public GifImageResource(String key, FrameSequence frameSequence) { |
| 35 | // GIF does not support exif tags |
| 36 | super(key, ExifInterface.ORIENTATION_NORMAL); |
| 37 | mFrameSequence = frameSequence; |
| 38 | } |
| 39 | |
| 40 | public static GifImageResource createGifImageResource(String key, InputStream inputStream) { |
| 41 | final FrameSequence frameSequence; |
| 42 | try { |
| 43 | frameSequence = FrameSequence.decodeStream(inputStream); |
| 44 | } finally { |
| 45 | try { |
| 46 | inputStream.close(); |
| 47 | } catch (IOException e) { |
| 48 | // Nothing to do if we fail closing the stream |
| 49 | } |
| 50 | } |
| 51 | if (frameSequence == null) { |
| 52 | return null; |
| 53 | } |
| 54 | return new GifImageResource(key, frameSequence); |
| 55 | } |
| 56 | |
| 57 | @Override |
| 58 | public Drawable getDrawable(Resources resources) { |
Tom Taylor | e4e1199 | 2017-06-20 14:26:43 -0700 | [diff] [blame] | 59 | try { |
| 60 | return new FrameSequenceDrawable(mFrameSequence); |
| 61 | } catch (final Exception e) { |
| 62 | // Malicious gif images can make platform throw different kind of exceptions. Catch |
| 63 | // them all. |
| 64 | LogUtil.e(LogUtil.BUGLE_TAG, "Error getting drawable for GIF", e); |
| 65 | return null; |
| 66 | } |
Mike Dodd | d3b009a | 2015-08-11 11:16:59 -0700 | [diff] [blame] | 67 | } |
| 68 | |
| 69 | @Override |
| 70 | public Bitmap getBitmap() { |
| 71 | Assert.fail("GetBitmap() should never be called on a gif."); |
| 72 | return null; |
| 73 | } |
| 74 | |
| 75 | @Override |
| 76 | public byte[] getBytes() { |
| 77 | Assert.fail("GetBytes() should never be called on a gif."); |
| 78 | return null; |
| 79 | } |
| 80 | |
| 81 | @Override |
| 82 | public Bitmap reuseBitmap() { |
| 83 | return null; |
| 84 | } |
| 85 | |
| 86 | @Override |
| 87 | public boolean supportsBitmapReuse() { |
| 88 | // FrameSequenceDrawable a.) takes two bitmaps and thus does not fit into the current |
| 89 | // bitmap pool architecture b.) will rarely use bitmaps from one FrameSequenceDrawable to |
| 90 | // the next that are the same sizes since they are used by attachments. |
| 91 | return false; |
| 92 | } |
| 93 | |
| 94 | @Override |
| 95 | public int getMediaSize() { |
| 96 | Assert.fail("GifImageResource should not be used by a media cache"); |
| 97 | // Only used by the media cache, which this does not use. |
| 98 | return 0; |
| 99 | } |
| 100 | |
| 101 | @Override |
| 102 | public boolean isCacheable() { |
| 103 | return false; |
| 104 | } |
| 105 | |
| 106 | @Override |
| 107 | protected void close() { |
| 108 | acquireLock(); |
| 109 | try { |
| 110 | if (mFrameSequence != null) { |
| 111 | mFrameSequence = null; |
| 112 | } |
| 113 | } finally { |
| 114 | releaseLock(); |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | } |