![]() Let’s tackle this problem from the C side of things back, outwards, to what we To do client-side image processing is one example. Zoomable and panning image viewer, but the concepts explored here could be usedįor any number of applications, using the speed of JavaScript produced Emscripten In this post, the imageĭata from an HTMLImageElement will be accessed and used within SDL2 to make a Run in the browser, but it can be equally useful to access parts of the HTMLĭocument from within an Emscripten compiled C program. Good for keeping changes down to a minimum when porting desktop applications to Previously, images were loaded using Emscripten’s concept of a virtualįilesystem, where assets are ‘preloaded’ with an XML HTTP request. Is how to somehow get the image data from the HTMLImageElement to beĪccessible from the Emscripten compiled C program. ![]() ![]() The main bit of ground here that I didn’t cover in my previous ImgViewer.changeImage(image) – changes the image shown by the image viewer to the.HTMLCanvasElement, canvas and show a pannable and zoomable copy of the ImgViewer(image, canvas) – sets up the viewer to use the.The end goal is to provide a JavaScript API to an image viewer, consisting of an Parts of the page’s HTML document outside of the Emscripten run-time. Image viewer using Emscripten and its proved to be a good exercise in accessing Recently I’ve ben playing around with developing a zoomable and panning
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