X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fglsl%2Freflect.cpp;h=c2a913f982acfcb61c6ca7a0289f3233f3d434e9;hp=c38e3aecbb3d487c6c7c2f10f510b6495092e872;hb=523491787b2b0321748a53f139c1a4355d2f9e85;hpb=03b21dc33ad615efa26849323a2018dd989218c3

diff --git a/source/glsl/reflect.cpp b/source/glsl/reflect.cpp
index c38e3aec..c2a913f9 100644
--- a/source/glsl/reflect.cpp
+++ b/source/glsl/reflect.cpp
@@ -6,6 +6,44 @@ namespace Msp {
 namespace GL {
 namespace SL {
 
+bool is_scalar(const BasicTypeDeclaration &type)
+{
+	return (type.kind==BasicTypeDeclaration::INT || type.kind==BasicTypeDeclaration::FLOAT);
+}
+
+bool is_vector_or_matrix(const BasicTypeDeclaration &type)
+{
+	return (type.kind==BasicTypeDeclaration::VECTOR || type.kind==BasicTypeDeclaration::MATRIX);
+}
+
+BasicTypeDeclaration *get_element_type(BasicTypeDeclaration &type)
+{
+	if(is_vector_or_matrix(type) || type.kind==BasicTypeDeclaration::ARRAY)
+	{
+		BasicTypeDeclaration *basic_base = dynamic_cast<BasicTypeDeclaration *>(type.base_type);
+		return (basic_base ? get_element_type(*basic_base) : 0);
+	}
+	else
+		return &type;
+}
+
+bool can_convert(const BasicTypeDeclaration &from, const BasicTypeDeclaration &to)
+{
+	if(from.kind==BasicTypeDeclaration::INT && to.kind==BasicTypeDeclaration::FLOAT)
+		return from.size<=to.size;
+	else if(from.kind!=to.kind)
+		return false;
+	else if(is_vector_or_matrix(from) && from.size==to.size)
+	{
+		BasicTypeDeclaration *from_base = dynamic_cast<BasicTypeDeclaration *>(from.base_type);
+		BasicTypeDeclaration *to_base = dynamic_cast<BasicTypeDeclaration *>(to.base_type);
+		return (from_base && to_base && can_convert(*from_base, *to_base));
+	}
+	else
+		return false;
+}
+
+
 unsigned TypeComparer::next_tag = 1;
 
 TypeComparer::TypeComparer():