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/* -*- 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_COLORBLENDACCESSORADAPTER_HXX
#define INCLUDED_BASEBMP_COLORBLENDACCESSORADAPTER_HXX
#include <basebmp/colortraits.hxx>
namespace basebmp
{
/** Accessor adapter that blends input value against fixed color value
Used to blend an alpha mask 'through' a fixed color value into the
destination.
The getter functors return a constant value (usually the zero of
the value type, this preserves the original destination content
when blitting through a mask) - there really isn't no other
sensible default behaviour for these methods.
*/
template< class WrappedAccessor,
typename AlphaType,
bool polarity > class ConstantColorBlendSetterAccessorAdapter
{
public:
typedef AlphaType alpha_type;
typedef AlphaType value_type;
typedef typename WrappedAccessor::value_type color_type;
private:
typename ColorTraits< color_type >::
template blend_functor<alpha_type,polarity>::type maFunctor;
WrappedAccessor maWrappee;
color_type maBlendColor;
value_type maGetterValue;
public:
ConstantColorBlendSetterAccessorAdapter() :
maFunctor(),
maWrappee(),
maBlendColor(),
maGetterValue()
{}
template< class T > explicit ConstantColorBlendSetterAccessorAdapter( T acc ) :
maFunctor(),
maWrappee(acc),
maBlendColor(),
maGetterValue()
{}
template< class T > ConstantColorBlendSetterAccessorAdapter( T acc,
color_type col ) :
maFunctor(),
maWrappee(acc),
maBlendColor(col),
maGetterValue()
{}
template< class T > ConstantColorBlendSetterAccessorAdapter( T acc,
color_type col,
value_type val ) :
maFunctor(),
maWrappee(acc),
maBlendColor(col),
maGetterValue(val)
{}
// -------------------------------------------------------
void setColor( color_type col ) { maBlendColor=col; }
color_type getColor() { return maBlendColor; }
void setGetterValue( value_type val ) { maGetterValue=val; }
value_type getGetterValue() { return maGetterValue; }
// -------------------------------------------------------
WrappedAccessor const& getWrappedAccessor() const { return maWrappee; }
WrappedAccessor& getWrappedAccessor() { return maWrappee; }
// -------------------------------------------------------
/// @return constant value, regardless of iterator content
template< typename IteratorType > value_type operator()(SAL_UNUSED_PARAMETER IteratorType const& ) const
{
return maGetterValue;
}
/// @return constant value, regardless of iterator content
template< typename IteratorType, class Difference >
value_type operator()(SAL_UNUSED_PARAMETER IteratorType const& , SAL_UNUSED_PARAMETER Difference const& ) const
{
return maGetterValue;
}
// -------------------------------------------------------
template< typename V, typename IteratorType >
void set(V const& value, IteratorType const& i) const
{
maWrappee.set(
maFunctor(
vigra::detail::RequiresExplicitCast<alpha_type>::cast(value),
maWrappee(i),
maBlendColor),
i );
}
template< typename V, typename IteratorType, class Difference >
void set(V const& value, IteratorType const& i, Difference const& diff) const
{
maWrappee.set(
maFunctor(
vigra::detail::RequiresExplicitCast<alpha_type>::cast(value),
maWrappee(i,diff),
maBlendColor),
i,
diff );
}
};
} // namespace basebmp
#endif /* INCLUDED_BASEBMP_COLORBLENDACCESSORADAPTER_HXX */
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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