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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_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 std::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 */
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