1 files changed, 111 insertions, 0 deletions
diff --git a/basebmp/inc/basebmp/pixelformatadapters.hxx b/basebmp/inc/basebmp/pixelformatadapters.hxx
new file mode 100644
index 000000000000..a769b3b3acae
--- /dev/null
+++ b/basebmp/inc/basebmp/pixelformatadapters.hxx
@@ -0,0 +1,111 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ * 
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef INCLUDED_BASEBMP_PIXELFORMATADAPTERS_HXX
+#define INCLUDED_BASEBMP_PIXELFORMATADAPTERS_HXX
+
+#include <basebmp/accessortraits.hxx>
+#include <basebmp/accessoradapters.hxx>
+
+#include <vigra/metaprogramming.hxx>
+
+namespace basebmp
+{
+
+// convenience functionality, providing everything necessary for a new
+// pixel format. simply plug in two conversion functors from/to a
+// common color format.
+
+/** Accessor selection metafunction, used to wrap a given accessor
+    with one converting between the pixel and color types
+
+    Use the nested template's typedef type, to retrieve an
+    AccessorAdapter which operates on a pixel value accessor, and
+    provides color values to the outside.
+
+    Nested like this, to avoid template template parameters at other
+    places: an instantiated version of AccessorSelector can be passed
+    to other templates, which in turn can invoke the nested meta
+    function.
+ */
+template< typename Getter, 
+          typename Setter > struct AccessorSelector
+{
+    template< typename Accessor > struct wrap_accessor
+    {
+        typedef UnaryFunctionAccessorAdapter< Accessor, 
+                                              Getter,
+                                              Setter > type;
+    };
+};
+
+//-----------------------------------------------------------------------------
+
+/** Convert color value to pixel data type
+ */    
+template< class Accessor, typename DataType > struct ColorConvert
+{
+    DataType operator()( const Accessor&               acc,
+                         typename Accessor::value_type v ) const
+    {
+        return acc.setter(v);
+    }
+};
+
+//-----------------------------------------------------------------------------
+
+/** Macro generates partial specialization for color-conversion
+    UnaryFunctionAccessorAdapter, and the given getter/setter functors
+ */
+#define BASEBMP_SPECIALIZE_ACCESSORTRAITS(Getter,Setter)          \
+template< class Accessor > struct AccessorTraits<                 \
+    UnaryFunctionAccessorAdapter< Accessor,                       \
+                                  Getter,                         \
+                                  Setter > >                      \
+{                                                                 \
+    typedef typename Accessor::value_type          data_type;     \
+    typedef UnaryFunctionAccessorAdapter<                         \
+        Accessor,                                                 \
+        Getter,                                                   \
+        Setter >                                   accessor_type; \
+    typedef typename accessor_type::value_type     value_type;    \
+    typedef ColorConvert< accessor_type,                          \
+                          data_type >              color_lookup;  \
+    typedef Accessor                               raw_accessor;  \
+    typedef vigra::VigraFalseType                  xor_accessor;  \
+    template< class MaskAccessor,                                 \
+              class Iterator,                                     \
+              class MaskIterator > struct          masked_accessor\
+    { typedef vigra::VigraFalseType type; };                      \
+}
+
+} // namespace basebmp
+
+#endif /* INCLUDED_BASEBMP_PIXELFORMATADAPTERS_HXX */
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */