OpenZoo/Go

After C, C++ and Free Pascal, comes an attempt at a port of ZZT in Go.

Compiling

SDL2 (Desktop)

Dependencies:

• Latest version of Go
• Latest version of SDL2 (on Windows, adding SDL2.dll to the build directory is sufficient)

Commands:

$ go generate
$ go build -x -tags sdl2,editor

WebAssembly (Web, Go)

Dependencies:

• Latest version of Go
• Recent version of Node.js

Commands:

$ mkdir out
$ cd web
$ npm run build && cp zeta.js ../out/zeta.min.js && cp res/* ../out/
$ cd ..
$ GOOS=js GOARCH=wasm go build -tags wasm -o out/openzoo-go.wasm

Tricks to make the binary a little smaller:

• Add -trimpath -ldflags="-s -w" at the end of the go build comamnd to remove/reduce debugging information. (~40KB as of 2022/10/06)
• Replace go build with garble -tiny build to remove debugging information/stack traces even further. (Install instructions for garble here.) (~150KB as of 2022/10/06)
• Use wasm-opt -Oz -o out/openzoo-go-optimized.wasm out/openzoo-go.wasm to run a separate optimization pass on the WASM binary. (~100KB as of 2022/10/06)

Tricks to make the binary a little smaller, if you really want to:

• Use -gcflags=all="-B" to disable bounds checking. (~100KB as of 2022/10/06)

WebAssembly (Web, TinyGo)

Warning: This version generates much smaller binaries, but currently runs into high GC pauses.

Dependencies:

• Latest version of TinyGo (>= 0.26.0)
• Recent version of Node.js

Commands:

$ mkdir out
$ cd web
$ npm run build && cp zeta.js ../out/zeta.min.js && cp res/* res_tinygo/* ../out/
$ cd ..
$ tinygo build -target wasm -wasm-abi js -scheduler asyncify -opt z -llvm-features "+bulk-memory"
$ cp openzoo-go.wasm out/