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+/*************************************************************************
+ *
+ * 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_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 */