92 lines
3.7 KiB
Plaintext
92 lines
3.7 KiB
Plaintext
/*
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* Copyright (C) 2021 Huawei Device Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the 'License');
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an 'AS IS' BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { IParseImage } from '../interface/IParseImage'
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import image from '@ohos.multimedia.image';
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import { BusinessError } from '@ohos.base'
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import taskpool from '@ohos.taskpool';
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import { LogUtil } from './LogUtil';
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export class ParseImageUtil implements IParseImage<PixelMap> {
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parseImage(imageinfo: ArrayBuffer, onCompleteFunction: (value: PixelMap) => void | PromiseLike<PixelMap>, onErrorFunction: (reason?: BusinessError | string) => void) {
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this.parseImageThumbnail(1, imageinfo, onCompleteFunction, onErrorFunction)
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}
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// scale(0,1)
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parseImageThumbnail(scale: number, imageinfo: ArrayBuffer, onCompleteFunction: (value: PixelMap) => void | PromiseLike<PixelMap>, onErrorFunction: (reason?: BusinessError | string) => void) {
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let imageSource: image.ImageSource = image.createImageSource(imageinfo); // 步骤一：文件转为pixelMap 然后变换 给Image组件
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imageSource.getImageInfo().then((value) => {
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let hValue = Math.round(value.size.height * scale);
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let wValue = Math.round(value.size.width * scale);
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let defaultSize: image.Size = {
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height: hValue,
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width: wValue
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};
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let opts: image.DecodingOptions = {
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editable: true,
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desiredSize: defaultSize
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};
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imageSource.createPixelMap(opts).then((pixelMap: image.PixelMap) => {
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onCompleteFunction(pixelMap);
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imageSource.release()
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}).catch((err: string) => {
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onErrorFunction(err);
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imageSource.release()
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})
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}).catch((err: string) => {
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onErrorFunction(err);
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imageSource.release()
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})
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// taskPoolExecutePixelMap(imageinfo,scale,onCompleteFunction,onErrorFunction); //多线程接口
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}
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}
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@Concurrent
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async function taskParseImage(arrayBuffer: ArrayBuffer, scale: number): Promise<PixelMap> {
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let imageSource: image.ImageSource = image.createImageSource(arrayBuffer); // 步骤一：文件转为pixelMap 然后变换 给Image组件
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let value = await imageSource.getImageInfo();
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let hValue = Math.round(value.size.height * scale);
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let wValue = Math.round(value.size.width * scale);
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let defaultSize: image.Size = {
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height: hValue,
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width: wValue
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};
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let opts: image.DecodingOptions = {
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editable: true,
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desiredSize: defaultSize
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};
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let pixelMap = await imageSource.createPixelMap(opts)
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LogUtil.log("ceshi321 : Succeeded in creating pixelmap taskpool " + pixelMap.getPixelBytesNumber())
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imageSource.release()
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return pixelMap;
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}
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function taskPoolExecutePixelMap(arrayBuffer: ArrayBuffer, scale: number, onCompleteFunction: (value: PixelMap) => void | PromiseLike<PixelMap>, onErrorFunction: (reason?: BusinessError | string) => void) {
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LogUtil.log("ceshi321 : arrayBuffer长度" + arrayBuffer.byteLength);
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let task = new taskpool.Task(taskParseImage, arrayBuffer, scale);
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task.setTransferList([]);
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taskpool.execute(task).then((pixelmap: Object) => {
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LogUtil.log('ceshi321 : Succeeded in creating pixelmap Ui .' + (pixelmap as image.PixelMap).getPixelBytesNumber())
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onCompleteFunction(pixelmap as image.PixelMap);
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}).catch((err: string) => {
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LogUtil.log("ceshi321 : test occur error: " + err);
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onErrorFunction(err);
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});
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} |