1/* 2 * Copyright (c) 2022 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16import type { Releasable } from '@ohos/common'; 17import { PixelMapWrapper } from './PixelMapWrapper'; 18 19export abstract class ImageFilterBase implements Releasable { 20 private filterName: string; 21 private cache: PixelMapWrapper = undefined; 22 23 constructor(name: string) { 24 this.filterName = name; 25 } 26 27 abstract render(pixelMap: PixelMapWrapper): PixelMapWrapper; 28 29 setCache(pixelMap: PixelMapWrapper) { 30 this.release(); 31 this.cache = pixelMap; 32 } 33 34 getCache(): PixelMapWrapper { 35 return this.cache; 36 } 37 38 release(): void { 39 if (this.isCached()) { 40 this.cache.release(); 41 this.cache = undefined; 42 } 43 } 44 45 isCached(): boolean { 46 return (this.cache != null && this.cache != undefined); 47 } 48 49 name(): string { 50 return this.filterName; 51 } 52}