X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fcore%2Fdatatype.cpp;h=4dd0b89fc2f8a2e7bd6c86bd75e9fd3465c4cbc3;hb=26634147dfbb5be9a4046a0d50b3b1d6857ad68d;hp=c43b8f44315432847e8d93ba55776ebb434d770f;hpb=e5881460cb0c2541fda9ff0b823d5ca1e0ecb986;p=libs%2Fgl.git

diff --git a/source/core/datatype.cpp b/source/core/datatype.cpp
index c43b8f44..4dd0b89f 100644
--- a/source/core/datatype.cpp
+++ b/source/core/datatype.cpp
@@ -88,11 +88,30 @@ namespace GL {
 
 GLenum get_gl_type(DataType type)
 {
-	const MappedType *ptr = lower_bound(type_map, type_map+type_map_size, type, type_compare);
-	if(ptr->type!=type)
+	const MappedType *end = type_map+type_map_size;
+	const MappedType *ptr = lower_bound(type_map, end, type, type_compare);
+	if(ptr==end || ptr->type!=type)
 		throw invalid_argument("get_gl_type");
 	return ptr->gl_type;
 }
 
+DataType from_gl_type(GLenum gl_type)
+{
+	for(unsigned i=0; i<type_map_size; ++i)
+		if(type_map[i].gl_type==gl_type)
+			return type_map[i].type;
+	throw invalid_argument("from_gl_type");
+}
+
+void require_type(DataType type)
+{
+	unsigned rows = ((type>>12)&3)+1;
+	unsigned cols = ((type>>14)&4)+1;
+	if(rows>1 && cols>1 && rows!=cols)
+		static Require _req(NV_non_square_matrices);
+	if((type&0x200) && get_type_size(type)/(rows*cols)==8)
+		static Require _req(ARB_gpu_shader_fp64);
+}
+
 } // namespace GL
 } // namespace Msp