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      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.Context;
     19 import android.graphics.Bitmap;
     20 import android.graphics.Canvas;
     21 import android.graphics.Matrix;
     22 import android.graphics.Paint;
     23 import android.graphics.RectF;
     24 import android.media.ExifInterface;
     25 
     26 import com.android.messaging.util.Assert;
     27 import com.android.messaging.util.ImageUtils;
     28 
     29 import java.io.FileNotFoundException;
     30 import java.io.InputStream;
     31 import java.util.List;
     32 
     33 /**
     34  * Requests a composite image resource. The composite image resource is constructed by first
     35  * sequentially requesting a number of sub image resources specified by
     36  * {@link CompositeImageRequestDescriptor#getChildRequestDescriptors()}. After this, the
     37  * individual sub images are composed into the final image onto their respective target rects
     38  * returned by {@link CompositeImageRequestDescriptor#getChildRequestTargetRects()}.
     39  */
     40 public class CompositeImageRequest<D extends CompositeImageRequestDescriptor>
     41         extends ImageRequest<D> {
     42     private final Bitmap mBitmap;
     43     private final Canvas mCanvas;
     44     private final Paint mPaint;
     45 
     46     public CompositeImageRequest(final Context context, final D descriptor) {
     47         super(context, descriptor);
     48         mBitmap = getBitmapPool().createOrReuseBitmap(
     49                 mDescriptor.desiredWidth, mDescriptor.desiredHeight);
     50         mCanvas = new Canvas(mBitmap);
     51         mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
     52     }
     53 
     54     @Override
     55     protected ImageResource loadMediaInternal(List<MediaRequest<ImageResource>> chainedTask) {
     56         final List<? extends ImageRequestDescriptor> descriptors =
     57                 mDescriptor.getChildRequestDescriptors();
     58         final List<RectF> targetRects = mDescriptor.getChildRequestTargetRects();
     59         Assert.equals(descriptors.size(), targetRects.size());
     60         Assert.isTrue(descriptors.size() > 1);
     61 
     62         for (int i = 0; i < descriptors.size(); i++) {
     63             final MediaRequest<ImageResource> request =
     64                     descriptors.get(i).buildSyncMediaRequest(mContext);
     65             // Synchronously request the child image.
     66             final ImageResource resource =
     67                     MediaResourceManager.get().requestMediaResourceSync(request);
     68             if (resource != null) {
     69                 try {
     70                     final RectF avatarDestOnGroup = targetRects.get(i);
     71 
     72                     // Draw the bitmap into a smaller size with a circle mask.
     73                     final Bitmap resourceBitmap = resource.getBitmap();
     74                     final RectF resourceRect = new RectF(
     75                             0, 0, resourceBitmap.getWidth(), resourceBitmap.getHeight());
     76                     final Bitmap smallCircleBitmap = getBitmapPool().createOrReuseBitmap(
     77                             Math.round(avatarDestOnGroup.width()),
     78                             Math.round(avatarDestOnGroup.height()));
     79                     final RectF smallCircleRect = new RectF(
     80                             0, 0, smallCircleBitmap.getWidth(), smallCircleBitmap.getHeight());
     81                     final Canvas smallCircleCanvas = new Canvas(smallCircleBitmap);
     82                     ImageUtils.drawBitmapWithCircleOnCanvas(resource.getBitmap(), smallCircleCanvas,
     83                             resourceRect, smallCircleRect, null /* bitmapPaint */,
     84                             false /* fillBackground */,
     85                             ImageUtils.DEFAULT_CIRCLE_BACKGROUND_COLOR /* circleBackgroundColor */,
     86                             ImageUtils.DEFAULT_CIRCLE_STROKE_COLOR /* circleStrokeColor */);
     87                     final Matrix matrix = new Matrix();
     88                     matrix.setRectToRect(smallCircleRect, avatarDestOnGroup,
     89                             Matrix.ScaleToFit.FILL);
     90                     mCanvas.drawBitmap(smallCircleBitmap, matrix, mPaint);
     91                 } finally {
     92                     resource.release();
     93                 }
     94             }
     95         }
     96 
     97         return new DecodedImageResource(getKey(), mBitmap, ExifInterface.ORIENTATION_NORMAL);
     98     }
     99 
    100     @Override
    101     public int getCacheId() {
    102         return BugleMediaCacheManager.AVATAR_IMAGE_CACHE;
    103     }
    104 
    105     @Override
    106     protected InputStream getInputStreamForResource() throws FileNotFoundException {
    107         throw new IllegalStateException("Composite image request doesn't support input stream!");
    108     }
    109 }
    110