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, 28 insertions, 0 deletions

diff --git a/source/slang/slang-preprocessor.cpp b/source/slang/slang-preprocessor.cpp
index aefbf7619..02f46103b 100644
--- a/source/slang/slang-preprocessor.cpp
+++ b/source/slang/slang-preprocessor.cpp
@@ -3635,6 +3635,29 @@ static void HandlePragmaDirective(PreprocessorDirectiveContext* context)
     (subDirective->callback)(context, subDirectiveToken);
 }
 
+static void HandleExtensionDirective(PreprocessorDirectiveContext* context)
+{
+    SkipToEndOfLine(context);
+}
+
+static void HandleVersionDirective(PreprocessorDirectiveContext* context)
+{
+    [[maybe_unused]]
+    int version;
+    switch(PeekTokenType(context))
+    {
+    case TokenType::IntegerLiteral:
+        version = stringToInt(AdvanceToken(context).getContent());
+        break;
+    default:
+        GetSink(context)->diagnose(GetDirectiveLoc(context), Diagnostics::expectedIntegralVersionNumber);
+        break;
+    }
+
+    SkipToEndOfLine(context);
+    // TODO, just skip the version for now
+}
+
 // Handle an invalid directive
 static void HandleInvalidDirective(PreprocessorDirectiveContext* context)
 {
@@ -3689,6 +3712,11 @@ static const PreprocessorDirective kDirectives[] =
     { "line",       &HandleLineDirective,       0 },
     { "pragma",     &HandlePragmaDirective,     0 },
 
+    // GLSL
+    { "version",    &HandleVersionDirective,    0 },
+    { "extension",  &HandleExtensionDirective,    0 },
+
+
     { nullptr, nullptr, 0 },
 };