From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 10 Oct 2021 14:03:02 +0000 (+0300)
Subject: Reflect builtin decorators from SPIR-V modules
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=271760e6099bf5f4ad90894697dab911c236a0a3

Reflect builtin decorators from SPIR-V modules
---

diff --git a/source/core/module.cpp b/source/core/module.cpp
index eaed8a45..2326a5e7 100644
--- a/source/core/module.cpp
+++ b/source/core/module.cpp
@@ -37,6 +37,7 @@ enum SpirVConstants
 	DECO_SPEC_ID = 1,
 	DECO_ARRAY_STRIDE = 6,
 	DECO_MATRIX_STRIDE = 7,
+	DECO_BUILTIN = 11,
 	DECO_LOCATION = 30,
 	DECO_BINDING = 33,
 	DECO_DESCRIPTOR_SET = 34,
@@ -504,6 +505,9 @@ void SpirVModule::Reflection::reflect_decorate(CodeIterator op)
 	case DECO_ARRAY_STRIDE:
 		types[id].array_stride = *op;
 		break;
+	case DECO_BUILTIN:
+		variables[id].builtin = static_cast<BuiltinSemantic>(*op);
+		break;
 	case DECO_LOCATION:
 		variables[id].location = *op;
 		break;
@@ -531,6 +535,9 @@ void SpirVModule::Reflection::reflect_member_decorate(CodeIterator op)
 	case DECO_MATRIX_STRIDE:
 		member.matrix_stride = *op;
 		break;
+	case DECO_BUILTIN:
+		member.builtin = static_cast<BuiltinSemantic>(*op);
+		break;
 	case DECO_OFFSET:
 		member.offset = *op;
 		break;
diff --git a/source/core/module.h b/source/core/module.h
index 7713d3ce..9ac54d32 100644
--- a/source/core/module.h
+++ b/source/core/module.h
@@ -79,6 +79,15 @@ public:
 		OUTPUT = 3
 	};
 
+	enum BuiltinSemantic
+	{
+		NOT_BUILTIN = -1,
+		POSITION = 0,
+		CLIP_DISTANCE = 3,
+		LAYER = 9,
+		FRAG_DEPTH = 22
+	};
+
 	struct Constant;
 	struct Structure;
 	struct Variable;
@@ -100,6 +109,7 @@ public:
 		const Constant *array_size_spec = 0;
 		unsigned array_stride = 0;
 		unsigned matrix_stride = 0;
+		BuiltinSemantic builtin = NOT_BUILTIN;
 	};
 
 	struct Structure
@@ -120,6 +130,7 @@ public:
 		int location = -1;
 		int descriptor_set = -1;
 		int binding = -1;
+		BuiltinSemantic builtin = NOT_BUILTIN;
 
 		bool operator==(const Variable &) const;
 	};