1 /* 2 * Copyright (C) 2014 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.systemui; 18 19 import android.graphics.Bitmap; 20 import android.graphics.BitmapShader; 21 import android.graphics.Canvas; 22 import android.graphics.Matrix; 23 import android.graphics.Paint; 24 import android.graphics.RectF; 25 import android.graphics.Shader; 26 27 public class BitmapHelper { 28 /** 29 * Generate a new bitmap (width x height pixels, ARGB_8888) with the input bitmap scaled 30 * to fit and clipped to an inscribed circle. 31 * @param input Bitmap to resize and clip 32 * @param width Width of output bitmap (and diameter of circle) 33 * @param height Height of output bitmap 34 * @return A shiny new bitmap for you to use 35 */ 36 public static Bitmap createCircularClip(Bitmap input, int width, int height) { 37 if (input == null) return null; 38 39 final int inWidth = input.getWidth(); 40 final int inHeight = input.getHeight(); 41 final Bitmap output = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); 42 final Canvas canvas = new Canvas(output); 43 final Paint paint = new Paint(); 44 paint.setShader(new BitmapShader(input, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP)); 45 paint.setAntiAlias(true); 46 final RectF srcRect = new RectF(0, 0, inWidth, inHeight); 47 final RectF dstRect = new RectF(0, 0, width, height); 48 final Matrix m = new Matrix(); 49 m.setRectToRect(srcRect, dstRect, Matrix.ScaleToFit.CENTER); 50 canvas.setMatrix(m); 51 canvas.drawCircle(inWidth / 2, inHeight / 2, inWidth / 2, paint); 52 return output; 53 } 54 } 55
