Add GLSL Compatibility. (#3321)

* Parse glsl buffer blocks to GLSLInterfaceBlockDecl

* Parse glsl local size layout declarations

* Parse (and ignore) glsl version directives

* spelling

* Better l-value interpretation for glsl interface blocks

* Better l-value interpretation for glsl interface blocks

* Add compile flag for enabling glsl

* Parse and ignore precision modifiers.

* Automatically import `glsl` module for compatiblity.

* Complete vector and matrix types for glsl

* Remove generated file from repo

* Bump .gitignore

* do not mark out globals as params

* Synthesize entrypoint layout from global inout vars.

* update test result.

* Allow HLSL semantic on global variables.

* Fix.

* Fix test.

* Fix win32 compile error.

* Add more builtin input/output and texture intrinsics.

* Add struct/array constructor syntax.

* Skip `#extension` lines.

* overide operator * for matrix/vector multiplication.

* Add `matrixCompMult`.

* Parse modifiers in for loop init var declr.

* Add more glsl intrinsics, add stage into to var layout.

* Allow `int[3] x` syntax.

* Fix array type syntax.

---------

Co-authored-by: Ellie Hermaszewska <ellieh@nvidia.com>
Co-authored-by: Yong He <yhe@nvidia.com>

1 files changed, 9 insertions, 2 deletions

diff --git a/source/slang/slang-options.cpp b/source/slang/slang-options.cpp
index 67f95df1e..1c1ad8f1c 100644
--- a/source/slang/slang-options.cpp
+++ b/source/slang/slang-options.cpp
@@ -141,6 +141,7 @@ enum class OptionKind
     FileSystem,
     Heterogeneous,
     NoMangle,
+    AllowGLSL,
 
     // Internal
 
@@ -621,7 +622,8 @@ void initCommandOptions(CommandOptions& options)
         { OptionKind::FileSystem, "-file-system", "-file-system <file-system-type>", 
         "Set the filesystem hook to use for a compile request."},
         { OptionKind::Heterogeneous, "-heterogeneous", nullptr, "Output heterogeneity-related code." },
-        { OptionKind::NoMangle, "-no-mangle", nullptr, "Do as little mangling of names as possible." }
+        { OptionKind::NoMangle, "-no-mangle", nullptr, "Do as little mangling of names as possible." },
+        { OptionKind::AllowGLSL, "-allow-glsl", nullptr, "Enable GLSL as an input language." },
     };
     _addOptions(makeConstArrayView(experimentalOpts), options);
 
@@ -912,6 +914,8 @@ struct OptionsParser
 
     String m_spirvCoreGrammarJSONPath;
 
+    bool m_allowGLSLInput = false;
+
     CommandLineReader m_reader;
 
     CommandOptionsWriter::Style m_helpStyle = CommandOptionsWriter::Style::Text;
@@ -1812,6 +1816,7 @@ SlangResult OptionsParser::_parse(
         switch (optionKind)
         {
             case OptionKind::NoMangle: m_flags |= SLANG_COMPILE_FLAG_NO_MANGLING; break;
+            case OptionKind::AllowGLSL: m_allowGLSLInput = true; break;
             case OptionKind::EmitIr: m_requestImpl->m_emitIr = true; break;
             case OptionKind::LoadStdLib:
             {
@@ -2152,7 +2157,7 @@ SlangResult OptionsParser::_parse(
                 m_compileRequest->setEnableEffectAnnotations(true);
                 break;
             }
-            
+
             case OptionKind::EntryPointName:
             {
                 CommandLineArg name;
@@ -2482,6 +2487,8 @@ SlangResult OptionsParser::_parse(
 
     m_compileRequest->setCompileFlags(m_flags);
 
+    m_compileRequest->setAllowGLSLInput(m_allowGLSLInput);
+
     // As a compatability feature, if the user didn't list any explicit entry
     // point names, *and* they are compiling a single translation unit, *and* they
     // have either specified a stage, or we can assume one from the naming