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      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.support.v8.renderscript.Allocation;
     22 import android.support.v8.renderscript.RenderScript;
     23 import android.util.Log;
     24 import com.android.gallery3d.filtershow.cache.BitmapCache;
     25 import com.android.gallery3d.filtershow.imageshow.MasterImage;
     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 
     34     public Buffer(Bitmap bitmap) {
     35         RenderScript rs = CachingPipeline.getRenderScriptContext();
     36         if (bitmap != null) {
     37             BitmapCache cache = MasterImage.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 
     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 
     59     public synchronized void useBitmap(Bitmap bitmap) {
     60         Canvas canvas = new Canvas(mBitmap);
     61         canvas.drawBitmap(bitmap, 0, 0, null);
     62     }
     63 
     64     public synchronized Bitmap getBitmap() {
     65         return mBitmap;
     66     }
     67 
     68     public Allocation getAllocation() {
     69         return mAllocation;
     70     }
     71 
     72     public void sync() {
     73         if (mUseAllocation) {
     74             mAllocation.copyTo(mBitmap);
     75         }
     76     }
     77 
     78     public ImagePreset getPreset() {
     79         return mPreset;
     80     }
     81 
     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 
     90     public void remove() {
     91         BitmapCache cache = MasterImage.getImage().getBitmapCache();
     92         if (cache.cache(mBitmap)) {
     93             mBitmap = null;
     94         }
     95     }
     96 }
     97 
     98