64k-starter

This is a template repository that can be used as a starting point when making (somewhat) small demoscene productions in Rust.

Out of the box it will:

• Minify shader sources as a build step using Shader_Minifier
• Create a fullscreen 1920x1080 window
• Load a fragment shader (the default example from Shadertoy)
• Load and play a WaveSabre song using wavesabre-rs
• Update the shader uniform (iTime) each frame
• Render until the song ends

Size

A release build (cargo build --release) of this project as is will result in a binary size of 27 136 bytes.

Packing it with UPX can then reduce it down to 15 360 bytes.

Without music

If you have a demo without music, or if you bring your own software synth, the size without music may be of interest.

3 584 bytes as is, but with some more linker tweaks it can be brought down further to 2 192 bytes, which UPX cannot improve.

Thanks to

• in4k/isystem1k4k for showing the bare minimum Win32 calls required to set everything up.
• mcountryman/min-sized-rust-windows for the linker flags I use in build.rs to reduce the size of the binary.