Serious Sam Engine In The Web Browser

26 Jan 2021

After a fair bit of work, I was able to get the open sourced Serious Sam Engine working in the browser. This project was a great learning experience and the result runs fairly smoothly.

• Github source
• Try it out

Things that don’t work in the build:

• Mutliplayer
• Splitscreen
• There is a small audio delay

The overall process is to use Emscripten to compile the engine source code into wasm/js runtime. Here’s a quick summary of the steps involved porting the code base to emscripten:

• Remove threaded code (already done)
• Ensure 32bit build works (already done)
• Ensure static build works (except for libraries provided by emscripten)
• Use gl4es library that translates/maps the OpenGL calls to OpenGL ES.
• Replace the infinite main loop with function to be called at the desired FPS from emscripten (emscripten_set_main_loop(..))