X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fcore%2Fdatatype.cpp;fp=source%2Fcore%2Fdatatype.cpp;h=af7446eb1f86916e23af1c2c84cd4e57c7fcf3ca;hb=096481bcb88844ec28fd33147ed5010bfe2e15d9;hp=c43b8f44315432847e8d93ba55776ebb434d770f;hpb=e5881460cb0c2541fda9ff0b823d5ca1e0ecb986;p=libs%2Fgl.git

diff --git a/source/core/datatype.cpp b/source/core/datatype.cpp
index c43b8f44..af7446eb 100644
--- a/source/core/datatype.cpp
+++ b/source/core/datatype.cpp
@@ -94,5 +94,23 @@ GLenum get_gl_type(DataType 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