I am trying to build a pixel that would track the current URL the user is on when they visit. I can use either JS (preferred) or a 1x1 image pixel. With JS I am assuming that I'd need to run an AJAX request to a PHP script to capture the info t...
I have an image on a browser.  I want to get the top left pixel of the image color (at coordinates: 0,0), no matter whether the image is rotated or not.    How can I do that, using javascript or php code?...
I am looking for a easy way to add a line of code to a plugin of mine, to convert a couple of pixel values into em values, because the layout of my project needs to be in ems. Is there an easy way to do this, because I don't want to add a third-p...
Maybe this is a noob question but...  I have a site where I want the footer to appear in the same place all the time. Assuming my users are all on >= IE8, Chrome and Firefox I figured it was just a question of getting the Window.outerHeight.  But...
I have a map that is a per pixel terrain. If you draw these pixels individually, it takes a lot of render time.  So my idea is to draw them in blocks of 100x100 images when the pixels are changed, and render those images.  The pixels in "chunk...
I would like to know a way to generate a single pixel in JavaScript converting it to base64. The ideal function would be:  function createPixel(hexColor, opacity){    //...Calculate    return base64DataURL; }   I am not very familiar with image proce...
In my HTML i have a <div> (call it the panel) with fixed width that contains some text; that text is set to font-size: 25px; line-height: 25px; in the accompanying CSS. It so happens that the text ends up as 36 lines.   Given that all margins,...
I need to process pixeldata from a 1000x1000px *.bmp image (~1MiB) in javascript At the moment i am a bit stuck, because the page freezes when i try to dump the data to the console. the important code so far:    var img = new Image(); img.src = '...
In html5, when you draw to a canvas using putImageData(), if some of the pixels you are drawing are transparent (or semi-transparent), how do you keep old pixels in the canvas unaffected?  example:  var imgData = context.createImageData(30,30); for(v...
I am wondering how I can get the number of pixels (or measurement in general) from a div to the top of the window in Javascript.  I am not looking for an offset y in relation to the document, simply to the top of where the browser is displaying.  I t...

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