WebRoot/js/script.js

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$(window).load(function(){
	
	// We are listening to the window.load event, so we can be sure
	// that the images in the slideshow are loaded properly.


	// Testing wether the current browser supports the canvas element:
	var supportCanvas = 'getContext' in document.createElement('canvas');

	// The canvas manipulations of the images are CPU intensive,
	// this is why we are using setTimeout to make them asynchronous
	// and improve the responsiveness of the page.

	var slides = $('#slideshow li'),
		current = 0,
		slideshow = {width:0,height:0};

	setTimeout(function(){
		
		window.console && window.console.time && console.time('Generated In');
		
		if(supportCanvas){
			$('#slideshow img').each(function(){

				if(!slideshow.width){
					// Taking the dimensions of the first image:
					slideshow.width = this.width;
					slideshow.height = this.height;
				}
				
				// Rendering the modified versions of the images:
				createCanvasOverlay(this);
			});
		}
		
		window.console && window.console.timeEnd && console.timeEnd('Generated In');
		
		$('#slideshow .arrow').click(function(){
			var li			= slides.eq(current),
				canvas		= li.find('canvas'),
				nextIndex	= 0;

			// Depending on whether this is the next or previous
			// arrow, calculate the index of the next slide accordingly.
			
			if($(this).hasClass('next')){
				nextIndex = current >= slides.length-1 ? 0 : current+1;
			}
			else {
				nextIndex = current <= 0 ? slides.length-1 : current-1;
			}

			var next = slides.eq(nextIndex);
			
			if(supportCanvas){

				// This browser supports canvas, fade it into view:

				canvas.fadeIn(function(){