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 package com.android.wallpaper.module; 17 18 import android.graphics.Rect; 19 20 import com.android.wallpaper.asset.Asset; 21 22 /** 23 * Default implementation of BitmapCropper, which actually crops and scales bitmaps. 24 */ 25 public class DefaultBitmapCropper implements BitmapCropper { 26 27 @Override cropAndScaleBitmap(Asset asset, float scale, Rect cropRect, boolean isRtl, Callback callback)28 public void cropAndScaleBitmap(Asset asset, float scale, Rect cropRect, 29 boolean isRtl, Callback callback) { 30 int targetWidth = (int) (cropRect.width() / scale); 31 int targetHeight = (int) (cropRect.height() / scale); 32 // Giving the target width and height can down-sample a large bitmap to a smaller target 33 // size, which saves memory use. 34 asset.decodeBitmapRegion(cropRect, targetWidth, targetHeight, isRtl, 35 bitmap -> { 36 if (bitmap == null) { 37 callback.onError(null); 38 return; 39 } 40 callback.onBitmapCropped(bitmap); 41 }); 42 } 43 } 44