lainchan/js/oekaki.js
ctrlcctrlv 78ea9af97c Oekaki
2013-08-08 22:15:59 +00:00

204 lines
4.8 KiB
JavaScript

$(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;
};
});
});