1 /* 2 * Copyright (C) 2017 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.dialer.callcomposer.util; 18 19 import android.graphics.Bitmap; 20 import android.graphics.Matrix; 21 import android.support.annotation.VisibleForTesting; 22 import com.android.dialer.common.Assert; 23 import com.android.dialer.common.LogUtil; 24 25 /** Utility class for resizing images before sending them as enriched call attachments. */ 26 public final class BitmapResizer { 27 @VisibleForTesting static final int MAX_OUTPUT_RESOLUTION = 640; 28 29 /** 30 * Returns a bitmap that is a resized version of the parameter image. The image will only be 31 * resized down and sized to be appropriate for an enriched call. 32 * 33 * @param image to be resized 34 * @param rotation degrees to rotate the image clockwise 35 * @return resized image 36 */ resizeForEnrichedCalling(Bitmap image, int rotation)37 public static Bitmap resizeForEnrichedCalling(Bitmap image, int rotation) { 38 Assert.isWorkerThread(); 39 40 int width = image.getWidth(); 41 int height = image.getHeight(); 42 43 Matrix matrix = new Matrix(); 44 matrix.postRotate(rotation); 45 46 LogUtil.i( 47 "BitmapResizer.resizeForEnrichedCalling", "starting height: %d, width: %d", height, width); 48 49 if (width <= MAX_OUTPUT_RESOLUTION && height <= MAX_OUTPUT_RESOLUTION) { 50 LogUtil.i("BitmapResizer.resizeForEnrichedCalling", "no resizing needed"); 51 return Bitmap.createBitmap(image, 0, 0, width, height, matrix, true); 52 } 53 54 float ratio = 1; 55 if (width > height) { 56 // landscape 57 ratio = MAX_OUTPUT_RESOLUTION / (float) width; 58 } else { 59 // portrait & square 60 ratio = MAX_OUTPUT_RESOLUTION / (float) height; 61 } 62 63 LogUtil.i( 64 "BitmapResizer.resizeForEnrichedCalling", 65 "ending height: %f, width: %f", 66 height * ratio, 67 width * ratio); 68 69 matrix.postScale(ratio, ratio); 70 return Bitmap.createBitmap(image, 0, 0, width, height, matrix, true); 71 } 72 } 73