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Diffstat (limited to 'basebmp/inc/basebmp/pixelformatadapters.hxx')
-rw-r--r-- | basebmp/inc/basebmp/pixelformatadapters.hxx | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/basebmp/inc/basebmp/pixelformatadapters.hxx b/basebmp/inc/basebmp/pixelformatadapters.hxx new file mode 100644 index 000000000000..2acd90b5bea8 --- /dev/null +++ b/basebmp/inc/basebmp/pixelformatadapters.hxx @@ -0,0 +1,108 @@ +/************************************************************************* + * + * 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 */ |