1 files changed, 124 insertions, 0 deletions
diff --git a/include/basebmp/accessortraits.hxx b/include/basebmp/accessortraits.hxx
new file mode 100644
index 000000000000..4ce9e6926e35
--- /dev/null
+++ b/include/basebmp/accessortraits.hxx
@@ -0,0 +1,124 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_BASEBMP_ACCESSORTRAITS_HXX
+#define INCLUDED_BASEBMP_ACCESSORTRAITS_HXX
+
+#include <basebmp/accessorfunctors.hxx>
+#include <basebmp/accessoradapters.hxx>
+#include <basebmp/metafunctions.hxx>
+
+#include <functional>
+
+namespace basebmp
+{
+
+struct FastMask;
+struct NoFastMask;
+
+/// Metafunction to select output mask functor from iterator and mask value type
+template< typename T, typename M, bool polarity, typename DUMMY > struct outputMaskFunctorSelector : public
+    ifBothScalarIntegral< T, M,
+                          IntegerOutputMaskFunctor< T, M, polarity >,
+                          GenericOutputMaskFunctor< T, M, polarity > >
+{
+};
+template< typename T, typename M, bool polarity > struct outputMaskFunctorSelector< T, M, polarity, FastMask > : public
+    ifBothScalarIntegral< T, M,
+                          FastIntegerOutputMaskFunctor< T, M, polarity >,
+                          GenericOutputMaskFunctor< T, M, polarity > >
+{
+};
+
+/** Metafunction providing a point of configuration for iterators
+    capable of employing the fast output mask functor.
+
+    Specialize this metafunction for your case, and pass FastMask to
+    the outputMaskFunctorSelector.
+ */
+template< class Accessor,
+          class MaskAccessor,
+          class Iterator,
+          class MaskIterator,
+          bool  polarity > struct maskedAccessorSelector
+{
+    typedef TernarySetterFunctionAccessorAdapter<
+        Accessor,
+        MaskAccessor,
+        typename outputMaskFunctorSelector<
+            typename Accessor::value_type,
+            typename MaskAccessor::value_type,
+            polarity,
+            NoFastMask > ::type >
+        type;
+};
+
+//-----------------------------------------------------------------------------
+
+/** Traits template for Accessor
+
+    Provides wrapped types for color lookup, raw pixel access, xor and
+    mask accessors.
+ */
+template< class Accessor > struct AccessorTraits
+{
+    /// value type of described accessor
+    typedef typename Accessor::value_type           value_type;
+
+    /// Retrieve stand-alone color lookup function for given Accessor type
+    typedef project2nd< Accessor, value_type > color_lookup;
+
+    /// Retrieve raw pixel data accessor for given Accessor type
+    typedef Accessor                                raw_accessor;
+
+    /// Retrieve wrapped accessor for XOR setter access
+    typedef BinarySetterFunctionAccessorAdapter<
+        Accessor,
+        XorFunctor< value_type > >                  xor_accessor;
+
+    /** Retrieve masked accessor for given types
+
+        A masked accessor works like a filter, where the mask gates
+        the accessor's setter methods (if the mask contains a 0 at a
+        given iterator position, the original value is
+        preserved. Otherwise, the new value gets set).
+
+        @attention be careful when retrieving a masked accessor for a
+        set of types, and using it for a different one - there are
+        partial specializations that take an optimized functor for
+        certain mask accessors.
+     */
+    template< class MaskAccessor,
+              class Iterator,
+              class MaskIterator,
+              bool  polarity > struct               masked_accessor :
+        public maskedAccessorSelector< Accessor,
+                                       MaskAccessor,
+                                       Iterator,
+                                       MaskIterator,
+                                       polarity >
+    {};
+
+};
+
+} // namespace basebmp
+
+#endif /* INCLUDED_BASEBMP_ACCESSORTRAITS_HXX */
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */