1 files changed, 129 insertions, 0 deletions
diff --git a/include/basebmp/greylevelformats.hxx b/include/basebmp/greylevelformats.hxx
new file mode 100644
index 000000000000..3fcd90fcda5f
--- /dev/null
+++ b/include/basebmp/greylevelformats.hxx
@@ -0,0 +1,129 @@
+/* -*- 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_GREYLEVELFORMATS_HXX
+#define INCLUDED_BASEBMP_GREYLEVELFORMATS_HXX
+
+#include <basebmp/color.hxx>
+#include <basebmp/colortraits.hxx>
+#include <basebmp/accessor.hxx>
+#include <basebmp/pixeliterator.hxx>
+#include <basebmp/packedpixeliterator.hxx>
+#include <basebmp/pixelformatadapters.hxx>
+#include <basebmp/metafunctions.hxx>
+
+#include <vigra/numerictraits.hxx>
+#include <vigra/metaprogramming.hxx>
+
+#include <functional>
+
+namespace basebmp
+{
+
+template< typename PixelType,
+          typename ColorType,
+          int      UsedRange > struct GreylevelGetter :
+        public std::unary_function<PixelType, ColorType>
+{
+    ColorType operator()( PixelType const& c ) const
+    {
+        return ColorTraits<ColorType>::fromGreyscale(
+            vigra::NumericTraits<PixelType>::toPromote(c) *
+            vigra::NumericTraits<PixelType>::maxConst / UsedRange );
+    }
+};
+
+template< typename PixelType,
+          typename ColorType,
+          int      UsedRange > struct GreylevelSetter :
+    public std::unary_function<ColorType, PixelType>
+{
+    PixelType operator()( ColorType const& c ) const
+    {
+        return vigra::NumericTraits<PixelType>::toPromote(
+            ColorTraits<ColorType>::toGreyscale(c)) *
+            UsedRange /
+            vigra::NumericTraits<PixelType>::maxConst;
+    }
+};
+
+//-----------------------------------------------------------------------------
+
+template< class Iterator,
+          class Accessor,
+          int   UsedRange > struct PixelFormatTraitsTemplate_Greylevel
+{
+    typedef typename Iterator::value_type       pixel_type;
+
+    typedef GreylevelGetter<pixel_type,
+                            Color,
+                            UsedRange>          getter_type;
+    typedef GreylevelSetter<pixel_type,
+                            Color,
+                            UsedRange>          setter_type;
+
+    typedef Iterator                            iterator_type;
+    typedef Accessor                            raw_accessor_type;
+    typedef AccessorSelector<
+        getter_type,
+        setter_type >                           accessor_selector;
+};
+
+template< int BitsPerPixel,
+          bool MsbFirst > struct PixelFormatTraitsTemplate_PackedGreylevel :
+    public PixelFormatTraitsTemplate_Greylevel<
+               PackedPixelIterator< sal_uInt8,
+                                    BitsPerPixel,
+                                    true >,
+               NonStandardAccessor< sal_uInt8 >,
+               (1UL << BitsPerPixel)-1 >
+{};
+
+//-----------------------------------------------------------------------------
+
+// 1bpp MSB
+typedef PixelFormatTraitsTemplate_PackedGreylevel<1, true> PixelFormatTraits_GREY1_MSB;
+
+// 1bpp LSB
+typedef PixelFormatTraitsTemplate_PackedGreylevel<1, false> PixelFormatTraits_GREY1_LSB;
+BASEBMP_SPECIALIZE_ACCESSORTRAITS(PixelFormatTraits_GREY1_MSB::getter_type,
+                                  PixelFormatTraits_GREY1_MSB::setter_type);
+
+
+// 4bpp MSB
+typedef PixelFormatTraitsTemplate_PackedGreylevel<4, true> PixelFormatTraits_GREY4_MSB;
+
+// 4bpp LSB
+typedef PixelFormatTraitsTemplate_PackedGreylevel<4, false> PixelFormatTraits_GREY4_LSB;
+BASEBMP_SPECIALIZE_ACCESSORTRAITS(PixelFormatTraits_GREY4_MSB::getter_type,
+                                  PixelFormatTraits_GREY4_MSB::setter_type);
+
+// 8bpp
+typedef PixelFormatTraitsTemplate_Greylevel<
+    PixelIterator< sal_uInt8 >,
+    StandardAccessor< sal_uInt8 >,
+    255 >                                                   PixelFormatTraits_GREY8;
+BASEBMP_SPECIALIZE_ACCESSORTRAITS(PixelFormatTraits_GREY8::getter_type,
+                                  PixelFormatTraits_GREY8::setter_type);
+
+} // namespace basebmp
+
+#endif /* INCLUDED_BASEBMP_GREYLEVELFORMATS_HXX */
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */