X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fglsl%2Freflect.cpp;h=151735ab18f3790d51b94bbf61da68726ce56a39;hp=688c99bf81b951ae288a23c9d5409e94fd7903c8;hb=8967d38bc578f1653c1dde01dce49a8f7b0c912e;hpb=42903b905cd3924ecc45d3cb08222bc3548cab91

diff --git a/source/glsl/reflect.cpp b/source/glsl/reflect.cpp
index 688c99bf..151735ab 100644
--- a/source/glsl/reflect.cpp
+++ b/source/glsl/reflect.cpp
@@ -44,6 +44,70 @@ void LocationCounter::visit(VariableDeclaration &var)
 }
 
 
+void MemoryRequirementsCalculator::visit(BasicTypeDeclaration &basic)
+{
+	if(basic.kind==BasicTypeDeclaration::BOOL)
+	{
+		r_size = 1;
+		r_alignment = 1;
+	}
+	else if(basic.kind==BasicTypeDeclaration::INT || basic.kind==BasicTypeDeclaration::FLOAT)
+	{
+		r_size = basic.size/8;
+		r_alignment = r_size;
+	}
+	else if(basic.kind==BasicTypeDeclaration::VECTOR || basic.kind==BasicTypeDeclaration::MATRIX)
+	{
+		basic.base_type->visit(*this);
+		unsigned n_elem = basic.size&0xFFFF;
+		r_size *= n_elem;
+		if(basic.kind==BasicTypeDeclaration::VECTOR)
+			r_alignment *= (n_elem==3 ? 4 : n_elem);
+	}
+	else if(basic.kind==BasicTypeDeclaration::ARRAY)
+		basic.base_type->visit(*this);
+}
+
+void MemoryRequirementsCalculator::visit(StructDeclaration &strct)
+{
+	unsigned total = 0;
+	unsigned max_align = 1;
+	for(NodeList<Statement>::iterator i=strct.members.body.begin(); i!=strct.members.body.end(); ++i)
+	{
+		r_size = 0;
+		r_alignment = 1;
+		r_offset = -1;
+		(*i)->visit(*this);
+		if(r_offset)
+			total = r_offset;
+		total += r_alignment-1;
+		total -= total%r_alignment;
+		total += r_size;
+		max_align = max(max_align, r_alignment);
+	}
+	r_size = total;
+	r_alignment = max_align;
+}
+
+void MemoryRequirementsCalculator::visit(VariableDeclaration &var)
+{
+	if(var.layout)
+	{
+		const vector<Layout::Qualifier> qualifiers = var.layout->qualifiers;
+		for(vector<Layout::Qualifier>::const_iterator i=qualifiers.begin(); (r_offset<0 && i!=qualifiers.end()); ++i)
+			if(i->name=="offset")
+				r_offset = i->value;
+	}
+
+	if(var.type_declaration)
+		var.type_declaration->visit(*this);
+	if(var.array)
+		if(const Literal *literal = dynamic_cast<const Literal *>(var.array_size.get()))
+			if(literal->value.check_type<int>())
+				r_size += r_alignment*(literal->value.value<int>()-1);
+}
+
+
 set<Node *> DependencyCollector::apply(FunctionDeclaration &func)
 {
 	func.visit(*this);