Server that listens on incoming requests and plays some graphics on the desktop.

What it does

This program listens on port 8081 for incoming requests. If a request comes in it blows a ton of confetti on your desktop using a compute-shader on your GPU.

How is it useful?

Well. Usefulness is a very subjective term. I use it so that I get notified when a chat-message from twitch comes in using this little program: https://github.com/michaeleggers/obs-twitch-bot.

TODOs

• Use native networking API to listen for requests and send a response.
• Start SDL window with OpenGL context.
• Move request-handling into its own thread.
• Experiment with wayland directly to make window non-clickable (failed, but was fun).
• Load GLSL code from disk and compile to SPIR-V via glslang.
• Create uniform buffer to animate shader with CPU-side data.
• Render a shit-load of particles using a compute-shader.
• Allow multiple events to be played at the same time.
• Investigate possible read/write hazard in compute shader. Weird artifacts appear sometimes.
• Load external models (OBJ).

Build requirements

• Linux OS
• clang++
• glslang (comes with eg. the Vulkan SDK)

Create Makefile (or whatever you need) via CMake. Then build the program. It will be put into the /bin/ directory.

Starting the program

The program expects you to either have the shaders next to the executable directory:

cp -r shaders bin/

or you pass the base-directory as a commandline-argument eg:

./curltest /home/<usename>/<...>/opengl-request-handler/

Wayland

Start the program with

SDL_VIDEODRIVER=x11 ./curltest

Otherwise the window will not be placed as the top-most one.