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      1 /*
      2  * Copyright (C) 2018 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.car.dialer.ui;
     17 
     18 import android.content.res.Resources;
     19 import android.graphics.Bitmap;
     20 import android.graphics.Canvas;
     21 import android.graphics.ColorFilter;
     22 import android.graphics.PixelFormat;
     23 import android.graphics.Rect;
     24 import android.graphics.drawable.Drawable;
     25 import android.support.annotation.NonNull;
     26 import android.support.v4.graphics.drawable.RoundedBitmapDrawable;
     27 import android.support.v4.graphics.drawable.RoundedBitmapDrawableFactory;
     28 
     29 
     30 /**
     31  * A drawable for displaying a circular bitmap. This is a wrapper over {@link RoundedBitmapDrawable}
     32  * since that implementation doesn't behave quite as desired.
     33  *
     34  * <p>Note that not all drawable functionality is passed to the RoundedBitmapDrawable at this
     35  * time. Feel free to add more as necessary.
     36  */
     37 public class CircleBitmapDrawable extends Drawable {
     38     private final Resources mResources;
     39 
     40     private Bitmap mBitmap;
     41     private RoundedBitmapDrawable mDrawable;
     42     private int mAlpha = -1;
     43     private ColorFilter mCf = null;
     44 
     45     public CircleBitmapDrawable(@NonNull Resources res, @NonNull Bitmap bitmap) {
     46         mBitmap = bitmap;
     47         mResources = res;
     48     }
     49 
     50     @Override
     51     public void onBoundsChange(Rect bounds) {
     52         super.onBoundsChange(bounds);
     53         int width = bounds.right - bounds.left;
     54         int height = bounds.bottom - bounds.top;
     55 
     56         Bitmap processed = mBitmap;
     57         mDrawable = RoundedBitmapDrawableFactory.create(mResources, processed);
     58         mDrawable.setBounds(bounds);
     59         mDrawable.setAntiAlias(true);
     60         mDrawable.setCornerRadius(Math.min(width, height) / 2f);
     61         if (mAlpha != -1) {
     62             mDrawable.setAlpha(mAlpha);
     63         }
     64         if (mCf != null) {
     65             mDrawable.setColorFilter(mCf);
     66         }
     67         invalidateSelf();
     68     }
     69 
     70     @Override
     71     public void draw(Canvas canvas) {
     72         if (mDrawable != null) {
     73             mDrawable.draw(canvas);
     74         }
     75     }
     76 
     77     @Override
     78     public int getOpacity() {
     79         return mDrawable != null ? mDrawable.getOpacity() : PixelFormat.TRANSLUCENT;
     80     }
     81 
     82     @Override
     83     public void setAlpha(int alpha) {
     84         mAlpha = alpha;
     85         if (mDrawable != null) {
     86             mDrawable.setAlpha(alpha);
     87             invalidateSelf();
     88         }
     89     }
     90 
     91     @Override
     92     public void setColorFilter(ColorFilter cf) {
     93         mCf = cf;
     94         if (mDrawable != null) {
     95             mDrawable.setColorFilter(cf);
     96             invalidateSelf();
     97         }
     98     }
     99 
    100     /**
    101      * Convert the drawable to a bitmap.
    102      * @param size The target size of the bitmap in pixels.
    103      * @return A bitmap representation of the drawable.
    104      */
    105     public Bitmap toBitmap(int size) {
    106         Bitmap largeIcon = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
    107         Canvas canvas = new Canvas(largeIcon);
    108         Rect bounds = getBounds();
    109         setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
    110         draw(canvas);
    111         setBounds(bounds);
    112         return largeIcon;
    113     }
    114 }
    115 
    116