![]() ![]() Another advantage is that you don't need to load every image individually, which can improve load performance. For instance, if you want to make a chart you could have a PNG image containing all the necessary text in a single file and depending on your data could change the scale of your chart fairly easily. If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying. You could have all elements in a single image file and use this method to composite a complete drawing. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself. ![]() Slicing can be a useful tool when you want to make compositions. The last four parameters define the rectangle into which to draw the image on the destination canvas. This was a fun challenge cuz it involved a binary search until it finds the right size. ![]() The first four parameters define the location and size of the slice on the source image. ![]() To really understand what this does, it may help to look at this image: You can even use the image produced by other canvas elements. External images can be used in any format supported by the browser, such as PNG, GIF, or JPEG. These can be used to do dynamic photo compositing or as backdrops of graphs, for sprites in games, and so forth. Given an image, this function takes the area of the source image specified by the rectangle whose top-left corner is ( sx, sy) and whose width and height are sWidth and sHeight and draws it into the canvas, placing it on the canvas at ( dx, dy) and scaling it to the size specified by dWidth and dHeight. One of the more exciting features of
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