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No image files are saved server side in this example, only rendered back to the page using Data URL's to allow Javascript to work with the images on a canvas. I prefer using heavily commented code to ...
Canvas to data URL is a useful feature of HTML5 that allows you to convert a canvas element into a data URI scheme, which can be used as a source for images, links, or downloads. However, using ...
As it proxies the regular toDataURL() function of the canvas, usage is similar to how one would get a data url for jpeg. var canvas = document.getElementById("your-canvas-id"); var BMPData = ...