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Details for the Doom on the Web demo
Usage
The demo works well on Firefox and Safari. Works, but slowly, on Opera. Extremely slow on Chrome due to V8 issue 947.
Use the normal Doom keyboard controls: For the menu, arrow keys and enter; for the game, arrow keys, control, space and alt (hold to strafe).
Use your browser's zoom to adjust the screen size (usually control + and control -).
Loading and saving games do work, but only until you leave the page. TODO: Use IndexedDB for persistent storage.
Technical details
The Doom source code was compiled from C to JavaScript using Emscripten and Clang. Optimized using the Closure Compiler.
Doom renders and handles input using the SDL API, which Emscripten implements in JavaScript.
Video output is done by an HTML canvas element.
Typed arrays are used for additional speed, if available in your browser.
Uses only well-accepted web standards. The only exception is audio which is done using the Mozilla Audio Data API, as sadly there is no universal standard for a simple, usable audio API yet. (The demo will still run if the Audo Data API is not present, just without sound.)
