glslang

Descrizione

Khronos reference front-end for GLSL and ESSL, and sample SPIR-V generator

There are several components:

* Reference Validator and GLSL/ESSL -> AST Front End An OpenGL GLSL and OpenGL|ES GLSL (ESSL) front-end for reference validation and translation of GLSL/ESSL into an internal abstract syntax tree (AST). Status: Virtually complete, with results carrying similar weight as the specifications.

* HLSL -> AST Front End An HLSL front-end for translation of an approximation of HLSL to glslang's AST form. Status: Partially complete. Semantics are not reference quality and input is not validated. This is in contrast to the DXC project, which receives a much larger investment and attempts to have definitive/reference-level semantics. See issue 362 and issue 701 for current status.

* AST -> SPIR-V Back End Translates glslang's AST to the Khronos-specified SPIR-V intermediate language. Status: Virtually complete.

* Reflector An API for getting reflection information from the AST, reflection types/variables/etc. from the HLL source (not the SPIR-V). Status: There is a large amount of functionality present, but no specification/goal to measure completeness against. It is accurate for the input HLL and AST, but only approximate for what would later be emitted for SPIR-V.

* Standalone Wrapper glslangValidator is command-line tool for accessing the functionality above. Status: Complete. Tasks waiting to be done are documented as GitHub issues.