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      1 /*
      2  * Copyright (C) 2016 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.emergency;
     17 
     18 import android.content.Context;
     19 import android.content.res.Resources;
     20 import android.graphics.Bitmap;
     21 import android.graphics.Canvas;
     22 import android.graphics.Color;
     23 import android.graphics.ColorFilter;
     24 import android.graphics.Paint;
     25 import android.graphics.Path;
     26 import android.graphics.PixelFormat;
     27 import android.graphics.PorterDuff;
     28 import android.graphics.PorterDuffXfermode;
     29 import android.graphics.Rect;
     30 import android.graphics.RectF;
     31 import android.graphics.drawable.Drawable;
     32 
     33 /**
     34  * Converts the user avatar icon to a circularly clipped one.
     35  * TODO: Use CircleFramedDrawable from Settings once it's moved to frameworks.
     36  */
     37 public class CircleFramedDrawable extends Drawable {
     38 
     39     private final Bitmap mBitmap;
     40     private final int mSize;
     41     private final Paint mPaint;
     42 
     43     private float mScale;
     44     private Rect mSrcRect;
     45     private RectF mDstRect;
     46 
     47     public static CircleFramedDrawable getInstance(Context context, Bitmap icon) {
     48         Resources res = context.getResources();
     49         float iconSize = res.getDimension(R.dimen.circle_avatar_size);
     50 
     51         CircleFramedDrawable instance = new CircleFramedDrawable(icon, (int) iconSize);
     52         return instance;
     53     }
     54 
     55     public CircleFramedDrawable(Bitmap icon, int size) {
     56         super();
     57         mSize = size;
     58 
     59         mBitmap = Bitmap.createBitmap(mSize, mSize, Bitmap.Config.ARGB_8888);
     60         final Canvas canvas = new Canvas(mBitmap);
     61 
     62         final int width = icon.getWidth();
     63         final int height = icon.getHeight();
     64         final int square = Math.min(width, height);
     65 
     66         final Rect cropRect = new Rect((width - square) / 2, (height - square) / 2, square, square);
     67         final RectF circleRect = new RectF(0f, 0f, mSize, mSize);
     68 
     69         final Path fillPath = new Path();
     70         fillPath.addArc(circleRect, 0f, 360f);
     71 
     72         canvas.drawColor(0, PorterDuff.Mode.CLEAR);
     73 
     74         // opaque circle matte
     75         mPaint = new Paint();
     76         mPaint.setAntiAlias(true);
     77         mPaint.setColor(Color.BLACK);
     78         mPaint.setStyle(Paint.Style.FILL);
     79         canvas.drawPath(fillPath, mPaint);
     80 
     81         // mask in the icon where the bitmap is opaque
     82         mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
     83         canvas.drawBitmap(icon, cropRect, circleRect, mPaint);
     84 
     85         // prepare paint for frame drawing
     86         mPaint.setXfermode(null);
     87 
     88         mScale = 1f;
     89 
     90         mSrcRect = new Rect(0, 0, mSize, mSize);
     91         mDstRect = new RectF(0, 0, mSize, mSize);
     92     }
     93 
     94     @Override
     95     public void draw(Canvas canvas) {
     96         final float inside = mScale * mSize;
     97         final float pad = (mSize - inside) / 2f;
     98 
     99         mDstRect.set(pad, pad, mSize - pad, mSize - pad);
    100         canvas.drawBitmap(mBitmap, mSrcRect, mDstRect, null);
    101     }
    102 
    103     public void setScale(float scale) {
    104         mScale = scale;
    105     }
    106 
    107     public float getScale() {
    108         return mScale;
    109     }
    110 
    111     @Override
    112     public int getOpacity() {
    113         return PixelFormat.TRANSLUCENT;
    114     }
    115 
    116     @Override
    117     public void setAlpha(int alpha) {
    118     }
    119 
    120     @Override
    121     public void setColorFilter(ColorFilter cf) {
    122     }
    123 
    124     @Override
    125     public int getIntrinsicWidth() {
    126         return mSize;
    127     }
    128 
    129     @Override
    130     public int getIntrinsicHeight() {
    131         return mSize;
    132     }
    133 }
    134 
    135