235 lines
7.1 KiB
JavaScript
235 lines
7.1 KiB
JavaScript
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$(document).ready(function(){
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var binary_level = 100
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var url = document.location.origin
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var cropper = null
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var snap = null
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Cropper.setDefaults({
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viewMode: 1,
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autoCropArea: 0.9
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})
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// Grab elements, create settings, etc.
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var canvas = document.getElementById('canvas');
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var context = canvas.getContext('2d');
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var video = document.getElementById('video');
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var mediaConfig = { video: true };
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var errBack = function(e) {
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console.log('An error has occurred!', e)
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};
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/**
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Take a new snapshot from the camera and store it
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**/
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function doSnap(){
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cropper && cropper.destroy()
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let width = video.width
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let height = video.height
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context.drawImage(video, 0, 0, width, height);
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snap = context.createImageData(width, height);
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snap.data.set( context.getImageData(0, 0, width, height).data )
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binary(context)
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$("#result").show()
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// Animation removed: it was causing problems with the send button. Fix.
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//$('html, body').animate({scrollTop: $("#result").offset().top}, 2000);
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cropper = new Cropper(canvas);
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}
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function doContrast(){
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let cropperData = {}
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if( cropper ){
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cropperData = cropper.getData()
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cropper.destroy()
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}
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context.putImageData(snap,0,0)
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binary(context)
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cropper = new Cropper(canvas);
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setTimeout( () => { cropper.setData(cropperData) ; },30)
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}
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// Trigger photo take
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$('.snap').on('click', function() {
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doSnap()
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});
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function binary(context){
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/*
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To convert image into binary , we will threshold it.
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Based upon the threshold value
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thresh_red, thresh_blue, thresh_green ==> are the respective red, blue and green color threshold values. Any thing above this threshold value will be denoted by white color and anything below will be black
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*/
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var image = context.getImageData(0, 0, context.canvas.width, context.canvas.height);
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var thresh_red = binary_level;
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var thresh_green = binary_level;
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var thresh_blue = binary_level;
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var channels = image.data.length/4;
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for(var i=0;i<channels;i++){
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var r = image.data[i*4 + 0];
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var g = image.data[i*4 + 1];
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var b = image.data[i*4 + 2];
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if( r>= thresh_red && g>= thresh_green && b>=thresh_blue ){
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image.data[i*4 + 0] = 255;
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image.data[i*4 + 1] = 255;
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image.data[i*4 + 2] = 255;
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}else{
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image.data[i*4 + 0] = 0;
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image.data[i*4 + 1] = 0;
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image.data[i*4 + 2] = 0;
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}
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}
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context.putImageData(image, 0, 0);
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}
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$("#result").hide()
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var slider = $( "#slider" ).slider({
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range: false,
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value: 100,
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animate: 300,
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min : 0,
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max : 255,
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change: function(event,ui){
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binary_level = ui.value
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console.log(`binary_level:${binary_level}`)
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doContrast()
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}
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});
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$("#send").on("click",function(){
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var cropCanvas = cropper.getCroppedCanvas();
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image_data = cropCanvas.toDataURL();
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$("#messages").html('<div class="alert alert-primary" role="alert">Sending...</div>')
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$.ajax({
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timeout: 3000,
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url: url + "/image",
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method:"POST",
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dataType: "json",
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data:{
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image_data : image_data,
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text : $("#text").val()
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},
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}).done(function(d,m,j){
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if( d.errors ){
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msg = d.errors.join(" / ")
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$("#messages").html(`<div class="alert alert-danger" role="alert">Something went wrong: ${msg}</div>`)
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return
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}
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$("#messages").html(`<div class="alert alert-success" role="alert">OK, your image will be available in a few seconds as <a href="#${d.hash_name}" class="hash_name btn btn-sm btn-secondary">${d.hash_name}</a></div>`)
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imageList = localStorage.getItem("imageList") ? JSON.parse(localStorage.getItem("imageList")) : []
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imageList.push(d.hash_name)
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localStorage.setItem("imageList",JSON.stringify(imageList))
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refreshImageList()
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})
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.fail(function(d,m,jq){
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$("#messages").html(`<div class="alert alert-danger" role="alert">Ooops... Something went wrong: ${jq}</div>`)
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})
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})
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var simuCanvas = document.getElementById("simuCanvas");
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var ctx = simuCanvas.getContext("2d");
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var lastpoint = { x: 0, y: 0, color: 0};
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var zoom = 1;
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//ctx.save
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Point = function( l ){
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return {
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"x" : l[0],
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"y" : l[1],
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"color" : l[2]
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}
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}
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// Draws every segment received, except black colored target ones
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var drawSimu = function() {
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pointsList = document.pointsList
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if (pointsList.length > 0)
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{
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ctx.clearRect(0,0,simuCanvas.width,simuCanvas.height);
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lastpoint = new Point(pointsList[0])
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for (var i = 0; i < pointsList.length; i+=1)
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{
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point = new Point(pointsList[i])
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// if the target is black, skip drawing
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if( point.color != 0){
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ctx.beginPath()
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ctx.shadowBlur = 5;
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ctx.shadowColor = 'rgba(255, 255, 255, 1)';
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ctx.lineWidth = 2;
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ctx.strokeStyle = "#"+(point.color + Math.pow(16, 6)).toString(16).slice(-6);
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ctx.moveTo(lastpoint.x * zoom, lastpoint.y * zoom);
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ctx.lineTo(point.x * zoom, point.y * zoom);
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ctx.stroke();
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ctx.closePath()
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}
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lastpoint = point
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}
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}
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}
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function refreshImageList(){
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var imageList = localStorage.getItem("imageList") ? JSON.parse(localStorage.getItem("imageList")) : []
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if( 0 == imageList.length){
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$("#preview").hide()
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return
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}
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$("#preview").show()
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html = ''
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for( id in imageList.reverse()){
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hash_name = imageList[id]
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html += `<li class="list-group-item"><a href="#${hash_name}" class="hash_name btn-sm btn btn-secondary" rel="${hash_name}">${hash_name}</a></li>`
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}
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$("#imageList").html(`<ul class="list-group">${html}</ul>`)
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}
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refreshImageList()
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var showImage = function(e){
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var el = $(e.target)
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if( ! el.hasClass("hash_name") ) { return; }
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var hash_name = el.attr("rel")
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var u = `${url}/hash_name/${hash_name}`
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$.ajax({
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timeout: 3000,
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url: `${url}/hash_name/${hash_name}`,
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dataType: "json",
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}).done(function(d,m,j){
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if( d.errors ){
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msg = d.errors.join(" / ")
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$("#messages").html(`<div class="alert alert-danger" role="alert">Something went wrong: ${msg}</div>`)
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return
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}
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$("#messages").html("")
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document.pointsList = d.points_list
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drawSimu()
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})
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.fail(function(d,m,jq){
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$("#messages").html(`<div class="alert alert-danger" role="alert">Ooops... Something went wrong: ${jq}</div>`)
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})
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}
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$("#imageList").on("click", showImage)
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$("#messages").on("click", showImage)
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$(".contrast").on("click",function(el){
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let btn = el.target
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let val = Number($(btn).attr("rel"))
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let new_binary_level = binary_level + val;
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console.log(`new_binary_level:${new_binary_level}`)
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if( new_binary_level >= 0 && new_binary_level <= 255){
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binary_level = new_binary_level
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$("#slider").slider("option","value",binary_level)
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}
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})
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})
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