This is the full source code for ochre 4K intro. All code is pure Rust and glsl. Please do not use this code to learn how to write good Rust code but you can use it to learn how to write code that compiles very small.
A more detailed explanation about the different size optimizations can be found here
During development use following to enable loading shader from shader.glsl and have movable camera and logs
xargo run --target i686-pc-windows-msvc --features logger
First compile release version
xargo rustc --release --target i686-pc-windows-msvc -- --emit=obj
Then use crinkler to compress ( the precise path to the windows sdk will depend on your version )
..\..\..\..\..\tools\crinkler /OUT:mini.exe /SUBSYSTEM:WINDOWS miniwin.o /ENTRY:mainCRTStartup "/LIBPATH:C:\Program Files (x86)\Windows Kits\10\Lib\10.0.18362.0\um\x86" gdi32.lib user32.lib opengl32.lib kernel32.lib winmm.lib
To analyze the compiled assembly code run
xargo rustc --release --features fullscreen --target i686-pc-windows-msvc -- --emit=asm
The glsl shader is compressed by the minifier using the command line
.\tools\shader_minifier.exe .\shader.glsl --preserve-externals --format none
This will create the the file shader_code.h from where you need to manually copy and paste the minified code into shader.rs