| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License |
| */ |
| |
| package com.android.systemui; |
| |
| import android.graphics.Bitmap; |
| import android.graphics.BitmapShader; |
| import android.graphics.Canvas; |
| import android.graphics.Matrix; |
| import android.graphics.Paint; |
| import android.graphics.RectF; |
| import android.graphics.Shader; |
| |
| public class BitmapHelper { |
| /** |
| * Generate a new bitmap (width x height pixels, ARGB_8888) with the input bitmap scaled |
| * to fit and clipped to an inscribed circle. |
| * @param input Bitmap to resize and clip |
| * @param width Width of output bitmap (and diameter of circle) |
| * @param height Height of output bitmap |
| * @return A shiny new bitmap for you to use |
| */ |
| public static Bitmap createCircularClip(Bitmap input, int width, int height) { |
| if (input == null) return null; |
| |
| final int inWidth = input.getWidth(); |
| final int inHeight = input.getHeight(); |
| final Bitmap output = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); |
| final Canvas canvas = new Canvas(output); |
| final Paint paint = new Paint(); |
| paint.setShader(new BitmapShader(input, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP)); |
| paint.setAntiAlias(true); |
| final RectF srcRect = new RectF(0, 0, inWidth, inHeight); |
| final RectF dstRect = new RectF(0, 0, width, height); |
| final Matrix m = new Matrix(); |
| m.setRectToRect(srcRect, dstRect, Matrix.ScaleToFit.CENTER); |
| canvas.setMatrix(m); |
| canvas.drawCircle(inWidth / 2, inHeight / 2, inWidth / 2, paint); |
| return output; |
| } |
| } |