A library for parsing Unity shaders. Consists of a few distinct components:

• A parser for ShaderLab, Unity's own Shader DSL.
• A parser for HLSL, the shading language embedded in ShaderLab.
• A preprocessor for dealing with macros before parsing.
• A framework for analyzing syntax trees using the visitor pattern, and for making edits to the corresponding source code.

Example usages:

• Used in HLSLInterpreter, a library for running shader code on the CPU.
• Used in Slang shading language plugin for Unity, here.
• Used in Orels' Unity shaders, in a few places (example 1, example 2).
• Another small example in this issue.
• The tests contain many small examples.

Available as either a single portable C# file, a zip archive, or via nuget.

Acknowledgements

• http://code.google.com/p/fxdis-d3d1x/ for test data
• https://github.com/James-Jones/HLSLCrossCompiler for test data
• http://developer.download.nvidia.com/shaderlibrary/webpages/shader_library.html for test data
• https://github.com/pema99/UnityShaderParser/tree/master/UnityShaderParser.Tests/TestShaders/Sdk for test data
• https://github.com/microsoft/DirectX-Graphics-Samples/ for test data
• Unity Builtin Shaders used as ShaderLab test data, available on the Unity download page
• https://github.com/tgjones/HlslTools was used as inspiration and reference for some of the HLSL parsing techniques