This library is used to generate all shaders in Unity for OpenGL, OpenGL ES 3.0+, Metal and Vulkan.
Changes from original HLSLCrossCompiler:
- Codebase changed to C++11, with major code reorganizations.
- Support for multiple language output backends (currently ToGLSL and ToMetal)
- Metal language output support
- Temp register type analysis: In DX bytecode the registers are typeless 32-bit 4-vectors. We do code analysis to infer the actual data types (to prevent the need for tons of bitcasts).
- Loop transformation: Detect constructs that look like for-loops and transform them back to their original form
- Support for partial precision variables in HLSL (min16float etc). Do extra analysis pass to infer the intended precision of samplers.
- Reflection interface to retrieve the shader inputs and their types.
- Lots of workarounds for various driver/shader compiler bugs.
- Lots of minor fixes and improvements for correctness
- Lots of Unity-specific tweaks to allow extending HLSL without having to change the D3D compiler itself.
This project does not include build files, or test suite, as they are integrated into the Unity build systems. However, building this library should be fairly straightforward: just compile `src/*.cpp` (in C++11 mode!) and `src/cbstring/*.c` with the following include paths:
