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.car.overview.utils; 17 18 import android.graphics.Bitmap; 19 import android.graphics.Canvas; 20 import android.graphics.ColorMatrix; 21 import android.graphics.ColorMatrixColorFilter; 22 import android.graphics.Paint; 23 24 /** 25 * Utility functions used by the Stream Service. 26 */ 27 public class BitmapUtils { 28 /** 29 * Apply saturation to a bitmap 30 */ applySaturation(Bitmap bitmap, float saturation)31 public static Bitmap applySaturation(Bitmap bitmap, float saturation) { 32 Bitmap mutableBitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true); 33 Canvas canvas = new Canvas(mutableBitmap); 34 35 Paint paint = new Paint(); 36 ColorMatrix colorMatrix = new ColorMatrix(); 37 colorMatrix.setSaturation(saturation); 38 ColorMatrixColorFilter filter = new ColorMatrixColorFilter(colorMatrix); 39 paint.setColorFilter(filter); 40 canvas.drawBitmap(bitmap, 0, 0, paint); 41 return mutableBitmap; 42 } 43 } 44