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glitch011.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<style>
body {
margin: 0px;
padding: 0px;
}
#myCanvas {
border: none;
}
#box {
position: absolute;
color: white;
bottom: 0px;
left: 0px;
width: 100px;
height: 100px;
background-color: #000;
visibility: visible;
opacity: 0.5;
border-top: 3px solid #ccc;
border-bottom: 3px solid #ccc;
margin-top: 5.0em;
}
#box p {
top: 4.7em;
}
</style>
<title>Glitch</title>
<script type="text/javascript">
var fSizeOut;
function randomRange(minValue, maxValue){
var vMin = minValue;
var vMax = maxValue;
return Math.floor((Math.random()*vMax)+vMin);
}
//drawImage(image, sx, sy, sw, sh, dx, dy, dw, dh) takes an image, clips it to the rectangle (sx, sy, sw, sh), scales it to dimensions (dw, dh), and draws it on the canvas at coordinates (dx, dy)
var canvas, context;
var dateNow, h, m, s, out;
function displayIMG_canvas() {
canvas = document.getElementById("myCanvas");
context = canvas.getContext("2d");
context.canvas.width = window.innerWidth;
context.canvas.height = window.innerHeight;
showTime();
}
function callBG(){
//draw image on canvas
var myIMG = new Image();
var myIMG_xPos = 0;
var myIMG_yPos = 0;
myIMG.src = "images/ca001.jpg";
context.drawImage(myIMG, myIMG_xPos, myIMG_yPos, canvas.width, canvas.height);
pixelate(25);
//drawImage(canvasCopy, 0, 0, canvasCopy.width, canvasCopy.height, 0, 0, canvas.width, canvas.height);
}
function showTime(){
context.canvas.width = window.innerWidth;
context.canvas.height = window.innerHeight;
//Variables
dateNow = new Date();
h = dateNow.getHours();
m = dateNow.getMinutes();
s = dateNow.getSeconds();
if (h <= 9){
h = "0" + h;
}
if (m <= 9){
m = "0" + m;
}
if (s <= 9){
s = "0" + s;
}
out = h + ":" + m + ":" + s;
callBG();
var wPos = (canvas.width/100)*3;
var fSize = (450)*((canvas.width-wPos*2)/(300*6));
var hPos = ((canvas.height)/2)+(fSize/3);
context.font = 'bold ' + fSize +'px sans-serif';
context.fillStyle = 'white';
context.fillText(out, wPos, hPos);
callFX();
displayBox();
setTimeout(showTime, 1000);
fSizeOut = fSize;
console.log("fSizeOut inside: ", fSizeOut);
}
console.log("fSizeOut outside: ", fSizeOut);
console.log("window.innerHeight: ", window.innerHeight);
//----------------------------------------------------------------------------- pixelate();
function pixelate(pixelSize){
//get image data
var imgData = context.getImageData(0, 0, canvas.width, canvas.height);
//get pixel data
var pixelData = imgData.data; //array de pixels
var cols = imgData.width;
var rows = imgData.height;
//mosaic routine
for(var y=0; y<rows; y += pixelSize) {
for(var x=0; x<cols; x += pixelSize) {
var r = pixelData[((cols * y) + x) * 4 +0];
var g = pixelData[((cols * y) + x) * 4 +1];
var b = pixelData[((cols * y) + x) * 4 +2];
var a = pixelData[((cols * y) + x) * 4 +3];
for(var n=0; n<pixelSize; n++){
for(var m = 0; m < pixelSize; m++) {
if(x + m < cols) {
pixelData[((cols * (y + n)) + (x + m)) * 4 + 0] = r;
pixelData[((cols * (y + n)) + (x + m)) * 4 + 1] = g;
pixelData[((cols * (y + n)) + (x + m)) * 4 + 2] = b;
}
}
}
}
}
//put image dat back
context.putImageData(imgData, 0, 0);
}
//----------------------------------------------------------------------------- slash();
function slash(line, stroke, offset){
//get image data
var imgData = context.getImageData(0, 0, canvas.width, canvas.height);
//get pixel data
var pixelData = imgData.data;
var alength = pixelData.length;
//set slash variables
var start = canvas.width*line
var range = canvas.width*stroke;
var myArray = new Array();
//slash routine
for (var j=0; j<range; j+=4){
myArray[j] = pixelData[j+start];
myArray[j+1] = pixelData[j+start+1];
myArray[j+2] = pixelData[j+start+2];
myArray[j+3] = pixelData[j+start+3];
}
for(var n=0; n<range; n++){
pixelData[n+start+offset] = myArray[n];
}
//put image data back
context.putImageData(imgData, 0, 0);
}
//----------------------------------------------------------------------------- chroma();
function chroma(displace, glitch, lPos, tPos, rPos, bPos){
//get image data
var imgData = context.getImageData(0, 0, canvas.width, canvas.height);
//get pixel data
var pixelData = imgData.data;
var cols = imgData.width;
var rows = imgData.height;
//selection
var lefPos = lPos;
var topPos = tPos;
var rigPos = rPos+100;
var botPos = bPos+100;
var selWidth = imgData.width-rigPos;
var selHeight = imgData.height-botPos;
var selX = (cols-((imgData.width-lefPos)-selWidth));
var selY = (rows-((imgData.height-topPos)-selHeight));
//chromatic aberration routine
for (var y = tPos; y < selY; y++) {
for (var x = lPos; x < selX; x++) {
var r = pixelData[((cols * y) + x) * 4- (glitch-1) * (displace*20)];
var g = pixelData[((cols * y) + x) * 4 +1];
var b = pixelData[((cols * y) + x) * 4 +1 + (glitch-1) * (displace*20)];
var a = pixelData[((cols * y) + x) * 4 +3];
var bw = r*.3 + g*.59 + b*.11;
pixelData[((cols * y) + x) * 4 +0] = r;
pixelData[((cols * y) + x) * 4 +1] = g;
pixelData[((cols * y) + x) * 4 +2] = b;
}
}
//put image data back
context.putImageData(imgData, 0, 0);
}
//-----------------------------------------------------------------------------
function callFX(){
//pixelate(randomRange(10,30));
slash(
randomRange(0,canvas.height*4),
randomRange(2,60),
-128);
slash(
randomRange(0,canvas.height*4),
randomRange(2,60),
60);
slash(600,60,-192);
if (randomRange(0,10)>8){
showTime();
pixelate(randomRange(20,30));
}
pixelate(4);
chroma(1, 0, 0, 0, 0, 0);
}
//----------------------------------------------------------------------------- displayBox();
function displayBox(){
var boxHeight = 100;
var borderHeight = (context.canvas.height - fSizeOut)/2;
console.log("borderHeight: " + borderHeight);
if (borderHeight <= boxHeight) {
document.getElementById("box").style.visibility="hidden";
console.log("hide box!");
}
else {
document.getElementById("box").style.visibility="visible";
console.log("show box");
}
}
</script>
</head>
<body onLoad="displayIMG_canvas()">
<canvas id="myCanvas"></canvas>
<div id="box">
<p>Test!!!!</p>
</div>
<script type="text/javascript">
// function displayResult()
// {
// document.getElementById("test1").style.visibility="hidden";
// console.log("teste");
// }
//displayResult();
</script>
</body>
</html>