diff options
Diffstat (limited to 'js/oekaki.js')
| -rw-r--r-- | js/oekaki.js | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/js/oekaki.js b/js/oekaki.js new file mode 100644 index 00000000..7bea3832 --- /dev/null +++ b/js/oekaki.js @@ -0,0 +1,203 @@ +$(function() { +var canvas = $("#cvs"); +var context = canvas[0].getContext("2d"); +var is_drawing = false; +var text = ""; +var eraser = getcolor = fill = false; +context.strokeStyle = context.fillStyle = "black"; + +//http://stackoverflow.com/a/5624139/1901658 +function hexToRgb(hex) { + var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex); + return result ? { + r: parseInt(result[1], 16), + g: parseInt(result[2], 16), + b: parseInt(result[3], 16) + } : null; +} + +//http://stackoverflow.com/a/4025958/1901658 +function arraysEqual(arr1, arr2) { + if(arr1.length !== arr2.length) + return false; + for(var i = arr1.length; i--;) { + if(arr1[i] !== arr2[i]) + return false; + } + + return true; +} + +function getmousepos(e){ + var r = canvas[0].getBoundingClientRect(); + mouseX = Math.round(e.clientX - r.left); + mouseY = Math.round(e.clientY - r.top); +} + +function setcolor(){ + context.strokeStyle = context.fillStyle = "#"+$(".color").val(); +} + +function flood_fill(x, y, target){ + var pixel = context.createImageData(1,1); + var color = hexToRgb("#"+$(".color").val()); + pixel.data[0] = color.r; pixel.data[1] = color.g; pixel.data[2] = color.b; pixel.data[3] = 255; + var queue = []; + var node = [x, y]; + queue.push(node); + //var iters = 0; + while (queue.length > 0) { + var n = queue.pop(); + var data = context.getImageData(n[0], n[1], 1, 1).data; + var d = [data[0], data[1], data[2], data[3]]; + var t = [target[0], target[1], target[2], target[3]]; + if (arraysEqual(d, t) && n[0] < 500 && n[1] < 250 && n[0] > -1 && n[1] > -1){ + context.putImageData(pixel, n[0], n[1]); + queue.push([n[0], n[1]-1]); + queue.push([n[0], n[1]+1]); + queue.push([n[0]-1, n[1]]); + queue.push([n[0]+1, n[1]]); + //iters++; + } + //if (iters%100===0){console.log(n[0]);console.log(n[1])} + + } + return; +} + +function color_under_pixel(x, y){ + return context.getImageData(x, y, 1, 1).data; +} + +canvas.on("mousedown", function(e){ + getmousepos(e); + $(this).css("cursor","none"); + if (getcolor) { + var imagedata = color_under_pixel(mouseX, mouseY); + $("#color")[0].color.fromRGB(imagedata[0], imagedata[1], imagedata[2]); + getcolor = false; + setcolor(); + } + else if (fill && !eraser) { + flood_fill(mouseX, mouseY, color_under_pixel(mouseX, mouseY)); + fill = false; + } + else { + is_drawing = true; + context.beginPath(); + context.moveTo(mouseX,mouseY); + context.fillText(text,mouseX,mouseY); + $("#confirm_oekaki").attr("checked",true); + } + +}); + +canvas.on("mousemove", function(e){ + getmousepos(e); + if (is_drawing) { + context.lineTo(mouseX,mouseY); + context.stroke() + } +}); + +canvas.on("mouseup mouseout", function(e){ + context.stroke() + $(this).css("cursor","auto"); + is_drawing = false; +}); + +$("#brushsize").on("click",function(){ + var size = prompt("Enter brush size"); + if (parseInt(size) == NaN) { + return + } + else { + context.lineWidth = size; + } +}); + +$(".color").on("change", setcolor); + +$("#text").on("click", function(e){ + text = prompt("Enter some text") || ""; + context.font = prompt("Enter font or leave alone", context.font) +}); + +function clear(){ + context.beginPath(); + context.clearRect(0,0,canvas.width(),canvas.height()); + $("#confirm_oekaki").attr("checked",false) +}; + +$("#clear").on("click", clear); + +$("#save").on("click",function(){ + $("#savebox").val(canvas[0].toDataURL()); +}); + +$("#load").on("click", function(){ + clear(); + var img = new Image(); + img.src = $("#savebox").val(); + img.onload = function(){context.drawImage(img,0,0);}; + $("#confirm_oekaki").attr("checked",true) +}); + +$("#eraser").on("click", function(){ + if (eraser) { + eraser = false; + context.strokeStyle = context.fillStyle = "#"+$(".color").val(); + context.globalCompositeOperation = old_gco; + } + else { + eraser = true; + old_gco = context.globalCompositeOperation; + context.globalCompositeOperation = "destination-out"; + context.strokeStyle = "rgba(0,0,0,1)"; + } +}); + +$("#getcolor").on("click", function(){ + getcolor = true; +}); + +$("#fill").on("click", function(){ + fill = true; +}); + +function dataURItoBlob(dataURI) { + var binary = atob(dataURI.split(',')[1]); + var array = new Array(binary.length); + for(var i = 0; i < binary.length; i++) { + array[i] = binary.charCodeAt(i); + } + return new Blob([new Uint8Array(array)], {type: 'image/jpeg'}); +} + +$("form[name='post']").on("submit", function(e){ + if ($("#confirm_oekaki").is(":checked")) { + e.preventDefault(); + $("input[type='file']").remove(); + var dataURL = canvas[0].toDataURL(); + var blob = dataURItoBlob(dataURL); + var fd = new FormData(document.forms[0]); + fd.append("file", blob, "Oekaki.png"); + fd.append("post", $("input[name='post']").val()); + $.ajax({ + type: "POST", + url: "/post.php", + data: fd, + processData: false, + contentType: false, + success: function(data) { + location.reload(); + }, + error: function(data) {alert("Something went wrong!"); console.log(data)} + }); + } + + else { + return true; + }; +}); +}); |