Home | History | Annotate | Download | only in drawable 
      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.settingslib.drawable;
     18 
     19 import android.content.Context;
     20 import android.content.res.Resources;
     21 import android.graphics.Bitmap;
     22 import android.graphics.Canvas;
     23 import android.graphics.Color;
     24 import android.graphics.ColorFilter;
     25 import android.graphics.Paint;
     26 import android.graphics.Path;
     27 import android.graphics.PixelFormat;
     28 import android.graphics.PorterDuff;
     29 import android.graphics.PorterDuffXfermode;
     30 import android.graphics.Rect;
     31 import android.graphics.RectF;
     32 import android.graphics.drawable.Drawable;
     33 
     34 import com.android.settingslib.R;
     35 
     36 /**
     37  * Converts the user avatar icon to a circularly clipped one.
     38  * TODO: Move this to an internal framework class and share with the one in Keyguard.
     39  */
     40 public class CircleFramedDrawable extends Drawable {
     41 
     42     private final Bitmap mBitmap;
     43     private final int mSize;
     44     private final Paint mPaint;
     45 
     46     private float mScale;
     47     private Rect mSrcRect;
     48     private RectF mDstRect;
     49 
     50     public static CircleFramedDrawable getInstance(Context context, Bitmap icon) {
     51         Resources res = context.getResources();
     52         float iconSize = res.getDimension(R.dimen.circle_avatar_size);
     53 
     54         CircleFramedDrawable instance = new CircleFramedDrawable(icon, (int) iconSize);
     55         return instance;
     56     }
     57 
     58     public CircleFramedDrawable(Bitmap icon, int size) {
     59         super();
     60         mSize = size;
     61 
     62         mBitmap = Bitmap.createBitmap(mSize, mSize, Bitmap.Config.ARGB_8888);
     63         final Canvas canvas = new Canvas(mBitmap);
     64 
     65         final int width = icon.getWidth();
     66         final int height = icon.getHeight();
     67         final int square = Math.min(width, height);
     68 
     69         final Rect cropRect = new Rect((width - square) / 2, (height - square) / 2, square, square);
     70         final RectF circleRect = new RectF(0f, 0f, mSize, mSize);
     71 
     72         final Path fillPath = new Path();
     73         fillPath.addArc(circleRect, 0f, 360f);
     74 
     75         canvas.drawColor(0, PorterDuff.Mode.CLEAR);
     76 
     77         // opaque circle matte
     78         mPaint = new Paint();
     79         mPaint.setAntiAlias(true);
     80         mPaint.setColor(Color.BLACK);
     81         mPaint.setStyle(Paint.Style.FILL);
     82         canvas.drawPath(fillPath, mPaint);
     83 
     84         // mask in the icon where the bitmap is opaque
     85         mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
     86         canvas.drawBitmap(icon, cropRect, circleRect, mPaint);
     87 
     88         // prepare paint for frame drawing
     89         mPaint.setXfermode(null);
     90 
     91         mScale = 1f;
     92 
     93         mSrcRect = new Rect(0, 0, mSize, mSize);
     94         mDstRect = new RectF(0, 0, mSize, mSize);
     95     }
     96 
     97     @Override
     98     public void draw(Canvas canvas) {
     99         final float inside = mScale * mSize;
    100         final float pad = (mSize - inside) / 2f;
    101 
    102         mDstRect.set(pad, pad, mSize - pad, mSize - pad);
    103         canvas.drawBitmap(mBitmap, mSrcRect, mDstRect, null);
    104     }
    105 
    106     public void setScale(float scale) {
    107         mScale = scale;
    108     }
    109 
    110     public float getScale() {
    111         return mScale;
    112     }
    113 
    114     @Override
    115     public int getOpacity() {
    116         return PixelFormat.TRANSLUCENT;
    117     }
    118 
    119     @Override
    120     public void setAlpha(int alpha) {
    121     }
    122 
    123     @Override
    124     public void setColorFilter(ColorFilter cf) {
    125     }
    126 
    127     @Override
    128     public int getIntrinsicWidth() {
    129         return mSize;
    130     }
    131 
    132     @Override
    133     public int getIntrinsicHeight() {
    134         return mSize;
    135     }
    136 }
    137