Renderer/ShaderAst: Add Swizzle

src/Nazara/Renderer/GlslWriter.cpp

@@ -278,6 +278,34 @@ namespace Nz
 		}
 	}
 
+	void GlslWriter::Write(const ShaderAst::SwizzleOp& node)
+	{
+		Write(node.expression);
+		Append(".");
+
+		for (std::size_t i = 0; i < node.componentCount; ++i)
+		{
+			switch (node.components[i])
+			{
+				case ShaderAst::SwizzleComponent::First:
+					Append("x");
+					break;
+
+				case ShaderAst::SwizzleComponent::Second:
+					Append("y");
+					break;
+
+				case ShaderAst::SwizzleComponent::Third:
+					Append("z");
+					break;
+
+				case ShaderAst::SwizzleComponent::Fourth:
+					Append("w");
+					break;
+			}
+		}
+	}
+
 	void GlslWriter::Append(ShaderAst::BuiltinEntry builtin)
 	{
 		switch (builtin)

src/Nazara/Renderer/ShaderAst.cpp

@@ -163,5 +163,21 @@ namespace Nz { namespace ShaderAst
 	{
 		visitor.Write(*this);
 	}
+
+
+	ExpressionType ShaderAst::SwizzleOp::GetExpressionType() const
+	{
+		return GetComponentType(expression->GetExpressionType());
+	}
+
+	void SwizzleOp::Register(ShaderWriter& visitor)
+	{
+		expression->Register(visitor);
+	}
+
+	void SwizzleOp::Visit(ShaderWriter& visitor)
+	{
+		visitor.Write(*this);
+	}
 }
 }