1 /*
2  * Copyright (C) 2013 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 
17 package com.android.gallery3d.filtershow.pipeline;
18 
19 import android.graphics.Bitmap;
20 import android.graphics.Canvas;
21 import android.renderscript.Allocation;
22 import android.renderscript.RenderScript;
23 import android.util.Log;
24 import com.android.gallery3d.filtershow.cache.BitmapCache;
25 import com.android.gallery3d.filtershow.imageshow.PrimaryImage;
26 
27 public class Buffer {
28     private static final String LOGTAG = "Buffer";
29     private Bitmap mBitmap;
30     private Allocation mAllocation;
31     private boolean mUseAllocation = false;
32     private ImagePreset mPreset;
33 
Buffer(Bitmap bitmap)34     public Buffer(Bitmap bitmap) {
35         RenderScript rs = CachingPipeline.getRenderScriptContext();
36         if (bitmap != null) {
37             BitmapCache cache = PrimaryImage.getImage().getBitmapCache();
38             mBitmap = cache.getBitmapCopy(bitmap, BitmapCache.PREVIEW_CACHE);
39         }
40         if (mUseAllocation) {
41             // TODO: recreate the allocation when the RS context changes
42             mAllocation = Allocation.createFromBitmap(rs, mBitmap,
43                     Allocation.MipmapControl.MIPMAP_NONE,
44                     Allocation.USAGE_SHARED | Allocation.USAGE_SCRIPT);
45         }
46     }
47 
isSameSize(Bitmap bitmap)48     public boolean isSameSize(Bitmap bitmap) {
49         if (mBitmap == null || bitmap == null) {
50             return false;
51         }
52         if (mBitmap.getWidth() == bitmap.getWidth()
53                 && mBitmap.getHeight() == bitmap.getHeight()) {
54             return true;
55         }
56         return false;
57     }
58 
useBitmap(Bitmap bitmap)59     public synchronized void useBitmap(Bitmap bitmap) {
60         Canvas canvas = new Canvas(mBitmap);
61         canvas.drawBitmap(bitmap, 0, 0, null);
62     }
63 
getBitmap()64     public synchronized Bitmap getBitmap() {
65         return mBitmap;
66     }
67 
getAllocation()68     public Allocation getAllocation() {
69         return mAllocation;
70     }
71 
sync()72     public void sync() {
73         if (mUseAllocation) {
74             mAllocation.copyTo(mBitmap);
75         }
76     }
77 
getPreset()78     public ImagePreset getPreset() {
79         return mPreset;
80     }
81 
setPreset(ImagePreset preset)82     public void setPreset(ImagePreset preset) {
83         if ((mPreset == null) || (!mPreset.same(preset))) {
84             mPreset = new ImagePreset(preset);
85         } else {
86             mPreset.updateWith(preset);
87         }
88     }
89 
remove()90     public void remove() {
91         BitmapCache cache = PrimaryImage.getImage().getBitmapCache();
92         if (cache.cache(mBitmap)) {
93             mBitmap = null;
94         }
95     }
96 }
97