Added matrix_traits.hlsl

Author: Przemog1

include/nbl/builtin/hlsl/matrix_utils/matrix_traits.hlsl

@@ -0,0 +1,45 @@
+#ifndef _NBL_BUILTIN_HLSL_MATRIX_UTILS_MATRIX_TRAITS_INCLUDED_
+#define _NBL_BUILTIN_HLSL_MATRIX_UTILS_MATRIX_TRAITS_INCLUDED_
+
+#include <nbl/builtin/hlsl/cpp_compat.hlsl>
+
+namespace nbl
+{
+namespace hlsl
+{
+
+template<typename MatT>
+struct matrix_traits;
+
+// i choose to implement it this way because of this DXC bug: https://github.com/microsoft/DirectXShaderCompiler/issues/7007
+#define DEFINE_MATRIX_TRAITS_TEMPLATE_SPECIALIZATION(ROW_COUNT, COLUMN_COUNT) \
+template<typename T> \
+struct matrix_traits<matrix<T, ROW_COUNT, COLUMN_COUNT> > \
+{ \
+    using scalar_type = T; \
+    using row_type = vector<T, COLUMN_COUNT>; \
+    NBL_CONSTEXPR_STATIC_INLINE uint32_t RowCount = ROW_COUNT; \
+    NBL_CONSTEXPR_STATIC_INLINE uint32_t ColumnCount = COLUMN_COUNT; \
+    NBL_CONSTEXPR_STATIC_INLINE bool Square = RowCount == ColumnCount; \
+};
+
+DEFINE_MATRIX_TRAITS_TEMPLATE_SPECIALIZATION(2, 2)
+DEFINE_MATRIX_TRAITS_TEMPLATE_SPECIALIZATION(3, 3)
+DEFINE_MATRIX_TRAITS_TEMPLATE_SPECIALIZATION(4, 4)
+DEFINE_MATRIX_TRAITS_TEMPLATE_SPECIALIZATION(3, 4)
+
+// TODO: when this bug: https://github.com/microsoft/DirectXShaderCompiler/issues/7007 is fixed, uncomment and delete template specializations
+/*template<typename T, uint32_t N, uint32_t M>
+struct matrix_traits<matrix<T,N,M> >
+{
+    using scalar_type = T;
+    NBL_CONSTEXPR_STATIC_INLINE uint32_t RowCount = ROW_COUNT;
+    NBL_CONSTEXPR_STATIC_INLINE uint32_t ColumnCount = COLUMN_COUNT;
+    NBL_CONSTEXPR_STATIC_INLINE bool Square = RowCount == ColumnCount;
+};
+*/
+
+}
+}
+
+#endif