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index.js
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index.js
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//import OXIPNGencode from "./app/codecs/oxipng/oxipngEncode.js"; // 无损的 OXIPNG 编码
import {wasmpngEncode} from "./app/codecs/wasmpng/wasmpng_RUN.js"; // 无损的 WASMPNG 编码
import {mozjpegEncode} from "./app/codecs/mozjpeg/mozjpeg_RUN.js";
import { WorkerPool } from './workerPool.js';
const downloadButton = document.getElementById('downloadButton');
const canvas = document.getElementById('displayImg');
const inputImage = document.getElementById('inputImage');
const dropImage = document.getElementById('upload-area');
//const worker = await new Worker('./app/codecs/wasmpng/worker.js');
//建立任务池
const initialWorkerCount = 3;
const workerPool = new WorkerPool('./workerPool.js', initialWorkerCount);
//workerPool.addWorker('./app/codecs/wasmpng/worker.js','wasmpng');
//类型判断
const getFormatFromArrayBuffer = (buffer) => {
const uint8 = new Uint8Array(buffer);
if (
uint8[0] === 0x89 &&
uint8[1] === 0x50 &&
uint8[2] === 0x4e &&
uint8[3] === 0x47 &&
uint8[4] === 0x0d &&
uint8[5] === 0x0a &&
uint8[6] === 0x1a &&
uint8[7] === 0x0a
) {
return 'png';
}
if (uint8[0] === 0xff && uint8[1] === 0xd8) {
return 'jpeg';
}
return null;
}
// // 无损的 OXIPNG 编码
// // const decodeImg = await decodeJPG(inputImage,options);
// // const result = await OXIPNGencode(inputImage,options);
// }
//图片压缩功能
const compress = async (inputImage, options) => {
//const compressedImage = await encodeJPG(inputImage, options);
const arraybuffType = getFormatFromArrayBuffer(inputImage);
if(arraybuffType == 'png'){
const compressedImage = await wasmpngEncode(workerPool,inputImage);
//const fileLength = compressedImage.byteLength / 8 / (1024 * 1024);
//console.log(`压缩后 ${fileLength} MB`);
//const resultDec = await decodePngWithLibpng(inputImage);
return compressedImage;
}else if(arraybuffType == 'jpeg'){
//console.log(inputImage)
const compressedImage = await mozjpegEncode(workerPool,inputImage);
//console.log(compressedImage)
//const fileLength = compressedImage.byteLength / 8 / (1024 * 1024);
//console.log(`压缩后 ${fileLength} MB`);
//const resultDec = await decode(inputImage);
//console.log(resultDec);
return compressedImage;
}else{
console.log("error");
}
//return compressedImage;
};
//拖拽上传功能
inputImage.addEventListener('dragover', (event) => {
event.preventDefault();
$(".custom-file-upload").css("background-color", "#fffffffa");
$("#tips").text("Release to start compression.");
//console.log("dragover")
});
inputImage.addEventListener('dragleave', (event) => {
event.preventDefault();
$(".custom-file-upload").css("background-color", "#ffffff7b");
$("#tips").text("Drop your PNG or JPEG files here!");
//console.log("dragover")
});
//打包文件功能
const compressAndDownload = async (results) => {
const zip = new JSZip();
for(const result of results){
const arrayBuffer = await result[0].arrayBuffer();
zip.file(result[1], arrayBuffer);
}
zip.generateAsync({ type: "blob" }).then(function (content) {
const name = "COMPRESSED.zip";
const url = URL.createObjectURL(content);
$('#down_all').css('display', 'block');
$('#downloadAllButton').attr('href',url);
$('#downloadAllButton').attr('download',name);
// $('#main-card').after(
// // '<div class="container p-1 m-0"><div class="row"><div class="col-6">'
// // +name+
// // '</div><div class="col text-end"></div><div class="col text-end"><a href="'
// // +url+
// // '" download="'
// // +name+
// // '">download</a></div></div></div>');
// '<div class="container-lg p-1 " id="down_all"><div class="p-1 container w-100"><div class="row w-100 g-1 justify-content-center"><div class="col-3 text-center"><button type="button" class="btn btn-dark"><a id="downloadButton" href="'
// +url+
// '" download="'
// +name+
// '">Download All</a></button></div></div></div></div>'
// )
});
}
//监听文件上传情况
inputImage.addEventListener('change', async (event) => {
if (event.target.files.length === 0) {
return;
}
//const FileInputChane = (event) => {
const files = event.target.files;
const newFiles = [];
const template = $('#item-template');
const percentTemplate = $('#percent-template');
for(const file of files){
const item = template.clone().contents();
item.find('#displayName').text(file.name);
item.find('.listhead').attr('id', file.name);
$('#main-card').append(item);
}
// for (const file of files) {
//const file = event.target.files[0];
const promises = Array.from(files).map(async (file) => {
const readerImg = new FileReader();
readerImg.readAsArrayBuffer(file);
return new Promise((resolve, reject) => { // 存储每个promise
readerImg.onload = () => {
//$('#main-card').append(item);
const inputImageU8 = readerImg.result;
const beforeLength = inputImageU8.byteLength / 1024;
const blobFileO = new Blob([inputImageU8], { type: 'image/jpeg' });
//canvas.src = URL.createObjectURL(blobFileO);
const beforeSrc = URL.createObjectURL(blobFileO);
const outputImage = compress(inputImageU8).then((fileRender) => {
const blobFile = new Blob([fileRender], { type: 'image/jpeg' });
//console.log("BN",blobFile.name)
const afterLength = fileRender.byteLength / 1024;
const percentage = Math.round(1000-afterLength/beforeLength*1000)/10;
//canvas.src = URL.createObjectURL(blobFile);
// downloadButton.href = URL.createObjectURL(blobFile);
// downloadButton.download = file.name;
// downloadButton.style.display = 'block';
const url = URL.createObjectURL(blobFile);
const name = file.name;
const displayName = name.slice(0,name.lastIndexOf(".")).slice(0,12)+'..'+name.substring(name.lastIndexOf(".")+1);
const percentNum = afterLength.toFixed(1)+'KB'+' | '+(percentage >= 0 ? '-' : '+') + Math.abs(percentage)
// $('#main-card').append(
// '<div class="p-1 my-1 container list-item" data-link="'
// +beforeSrc+
// '"><div class="row w-100 g-1"><div class="col-4 d-flex align-items-center">'
// +displayName+
// '</div><div class="col-4 d-flex align-items-center text-center justify-content-center">'
// +afterLength.toFixed(1)+'KB'+' | '+(percentage >= 0 ? '-' : '+') + Math.abs(percentage)+
// '</div><div class="col-3 text-end campareBox"><button type="button" class="btn btn-dark"><a id="downloadButton" class="text-light">Compare</a></button></div><div class="col-1 text-end"><button type="button" class="btn btn-dark"><a id="downloadButton" class="text-light" href="'
// +url+
// '" download="'
// +name+
// '">Download</a></button></div></div></div>'
// )
// 在 item 中填充数据,例如:
const percentItem = percentTemplate.clone().contents();
percentItem.text(percentNum)
$('#' + name.replace(/\./g, '\\.')).parent().find('.downloadButton').attr('href', url);
$('#' + name.replace(/\./g, '\\.')).parent().find('.downloadButton').attr('download', name);
$('#' + name.replace(/\./g, '\\.')).parent().attr('data-link', beforeSrc);
$('#' + name.replace(/\./g, '\\.') + ' .progressHead').after(percentItem);
$('#' + name.replace(/\./g, '\\.') + ' .progressHead').remove();
//newFiles.push(blobFile);
resolve([blobFile,name]);
}).catch((error) => {
reject(error);
//console.error(error);
});
//promises.push(promise);
};
});
})
Promise.all(promises).then((results) => { // 等待所有promise完成后执行后续代码
//console.log(results)
const zipComp = compressAndDownload(results);
}).catch((error) => {
console.error(error);
});
})
//图片对比功能
var lastAppendedElement;
$('body').on('click', '.campareBox', function () {
// 判断当前点击的按钮是否与上次点击的按钮相同
var isSameButton = lastAppendedElement && $(this).parent().next().is(lastAppendedElement.prev());
// 如果相同的按钮被点击,收起图片
if (isSameButton) {
lastAppendedElement.remove();
lastAppendedElement = null;
return;
}
// 移除上次添加的标签
console.log('click compare')
if (lastAppendedElement) {
lastAppendedElement.remove();
}
// 获取新图片链接和旧图片链接
var oldImageLink = $(this).parent().parent().parent().attr('data-link');
var newImageLink = $(this).parent().next().find('a').attr('href');
console.log(oldImageLink)
console.log(newImageLink)
// 在当前点击的div后面添加新标签,包含两个图片
var newElement = $('<div class="box-container d-flex justify-content-center"><div class="box added" style="width: 100%; height: 300px; overflow: hidden;"><div class="images-container d-flex w-100 h-100"></div></div></div>');
$(this).parent().next().after(newElement);
// 添加图片到images-container div中
var checkerboardImageUrl = './app/grid.jpg';
var oldImage = $('<div class="image-wrapper w-50 h-100" style="background-image: url(' + checkerboardImageUrl + ');"><img src="' + oldImageLink + '" alt="旧图片" class="h-100" /></div>');
var newImage = $('<div class="image-wrapper w-50 h-100" style="background-image: url(' + checkerboardImageUrl + ');"><img src="' + newImageLink + '" alt="新图片" class="h-100" /></div>');
newElement.find('.images-container').append(oldImage).append(newImage);
// 初始化panzoom插件
var panzoomInstanceOld = Panzoom(oldImage.find('img')[0]);
var panzoomInstanceNew = Panzoom(newImage.find('img')[0]);
oldImage.find('img').data('panzoomInstance', panzoomInstanceOld);
newImage.find('img').data('panzoomInstance', panzoomInstanceNew);
// 监听鼠标滚轮事件,实现缩放功能
newElement.find('.images-container').on('wheel', function (event) {
event.preventDefault();
event.stopPropagation();
var currentZoomOld = panzoomInstanceOld.getScale();
var currentZoomNew = panzoomInstanceNew.getScale();
var zoomStep = 0.1;
var minZoom = 0.5;
var maxZoom = 5;
var delta = event.originalEvent.deltaY;
var zoomOut = delta > 0;
// Calculate new zoom level based on current zoom level and zoom step
var newZoomOld = zoomOut ? currentZoomOld * (1 - zoomStep) : currentZoomOld * (1 + zoomStep);
var newZoomNew = zoomOut ? currentZoomNew * (1 - zoomStep) : currentZoomNew * (1 + zoomStep);
// Clamp the new zoom levels to the min and max limits
newZoomOld = Math.min(Math.max(newZoomOld, minZoom), maxZoom);
newZoomNew = Math.min(Math.max(newZoomNew, minZoom), maxZoom);
// Set the new zoom levels without triggering zoom event
panzoomInstanceOld.zoom(newZoomOld, {silent: true});
panzoomInstanceNew.zoom(newZoomNew, {silent: true});
});
// 将新旧图片的拖拽事件同步
newElement.find('.images-container').on('down', function (event, panzoomInstance, transform) {
console.log("down")
panzoomInstanceOld.setOptions({disablePan: false});
panzoomInstanceNew.setOptions({disablePan: false});
});
newElement.find('.images-container').on('move', function (event) {
var targetInstance = $(event.target).data('panzoomInstance')
if (targetInstance == panzoomInstanceOld) {
//panzoomInstanceNew.pan('pan', x, y, { animate: false });
// console.log(targetInstance.getPan().x)
panzoomInstanceNew.pan(targetInstance.getPan().x, targetInstance.getPan().y, {relative: false, animate: false});
} else {
// console.log(targetInstance.getPan().x)
panzoomInstanceOld.pan(targetInstance.getPan().x, targetInstance.getPan().y, {relative: false, animate: false});
}
});
newElement.find('.images-container').on('up', function (event, panzoomInstance, transform) {
console.log("up")
panzoomInstanceOld.setOptions({disablePan: true});
panzoomInstanceNew.setOptions({disablePan: true});
});
lastAppendedElement = newElement;
});
//download按钮悬浮功能
const $stickyDiv = $(".sticky-div");
function checkStickyDivPosition() {
const windowHeight = $(window).height();
const stickyDivBottom = $stickyDiv[0].getBoundingClientRect().bottom;
if (stickyDivBottom >= windowHeight) {
$stickyDiv.css("position", "relative");
} else {
$stickyDiv.css("position", "-webkit-sticky");
$stickyDiv.css("position", "sticky");
}
}
$(window).on("scroll", checkStickyDivPosition);
$(window).on("resize", checkStickyDivPosition);
// Trigger the function when the dynamic div height changes
// You can call this function whenever the div height changes
checkStickyDivPosition();