lssl - Lisp Shading Language
lssl is a Lisp(y) graphics shader language that compiles to SPIR-V assembly. It is inspired by GLSL and Clojure (and also written in Clojure).
⚠️ lssl is just a personal experiment at this stage and shold not be used for anything serious⚠️ currently it only compiles very basic programs
Rationale
I'm not sure really at this point, maybe the power of Lisp macros could be useful for shaders.
Usage
To compile the file frag.lsl to frag.spv.asm, call the lsslc Compiler like this:
lsslc -o frag.spv.asm frag.lsl
The generated file is in human readable SPIR-V assembly representation and needs to be assembled by spirv-as before it can be used.
spirv-as frag.spv.asm -o frag.spv
Example
(defversion 460 core)
(defout FragColor vec4
{:layout {:location 0}})
(defuniform inputs Inputs
{:layout {:memory :std140
:binding 0}}
(color vec4))
(defun void main []
(reset! FragColor (get inputs color)))Development
A few useful commands when working on the compiler:
# Running the compiler via clj
clj -M:lsslc ...
# Generating LWJGL dependencies for dev
clj -M:lwjgl/deps
# MAC-OS repl
clj -M:cider-repl
# and then cider-connect-clj in Emacs
License
Copyright © 2020 Markus Walther
This program and the accompanying materials are made available under the terms of the Eclipse Public License 2.0 which is available at http://www.eclipse.org/legal/epl-2.0.
This Source Code may also be made available under the following Secondary Licenses when the conditions for such availability set forth in the Eclipse Public License, v. 2.0 are satisfied: GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version, with the GNU Classpath Exception which is available at https://www.gnu.org/software/classpath/license.html.