YASL

Yet Another Shading Language.

A strong typed functional(not really) IR that compiles to GLSL.

See doc for syntax definition.

WARN

This is a demo project at very early stage. The code generation logic only works with primitive data and structs, GLSL opaque types like sampler are not supported.

The compiler only emits fragment shader and we provide a shader toy style viewer.

Requirement

• OCaml 4.11
• C++ 17
• Python 3

Download

git clone https://github.com/huisedenanhai/YASL.git

Build

To build the YASL to GLSL compiler

cd compiler
dune build

To build the viewer

First update dependencies

cd viewer/third_party/shaderc/utils
python3 git-sync-deps

Then build the viewer project with default cmake options

Usage

Compile YASL to GLSL

yasl [-ast] filename [-o output]
  -ast dump ast
  -o set output file name
  -help  Display this list of options
  --help  Display this list of options

Default output name is filename.gen.frag

Then feed the compiled fragment shader to the viewer

viewer filename.gen.frag

Sample YASL prorgams are in compiler/samples.

If one does correctly for the sample fractal.ysl, a fractal shape will be shown in the viewer.

Viewer

The viewer provides following uniforms

uniform iTime: float  /* Time from start */
uniform iResolution: vec2   /* Screen resolution */