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/*************************************************************************
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: intconversion.hxx,v $
*
* $Revision: 1.1 $
*
* last change: $Author: thb $ $Date: 2006-07-11 11:38:56 $
*
* The Contents of this file are made available subject to
* the terms of GNU Lesser General Public License Version 2.1.
*
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2005 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library 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 for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
************************************************************************/
#ifndef INCLUDED_BASEBMP_INTCONVERSION_HXX
#define INCLUDED_BASEBMP_INTCONVERSION_HXX
#include <vigra/rgbvalue.hxx>
#include <functional>
namespace basebmp
{
// metafunctions to retrieve correct POD from/to basebmp::Color
//------------------------------------------------------------------------
/// type-safe conversion from RgbValue to packed int32
template< class RgbVal > struct UInt32FromRgbValue
{
sal_uInt32 operator()( RgbVal const& c ) const
{
return (c[0] << 16) | (c[1] << 8) | c[2];
}
};
/// type-safe conversion from packed int32 to RgbValue
template< class RgbVal > struct RgbValueFromUInt32
{
RgbVal operator()( sal_uInt32 c ) const
{
return RgbVal((c >> 16) & 0xFF,
(c >> 8) & 0xFF,
c & 0xFF);
}
};
/// Get converter from given data type to sal_uInt32
template< typename DataType > struct uInt32Converter
{
typedef std::identity<DataType> to;
typedef std::identity<DataType> from;
};
template< unsigned int RedIndex,
unsigned int GreenIndex,
unsigned int BlueIndex > struct uInt32Converter<
vigra::RGBValue< sal_uInt8,
RedIndex,
GreenIndex,
BlueIndex > >
{
typedef UInt32FromRgbValue<
vigra::RGBValue< sal_uInt8,
RedIndex,
GreenIndex,
BlueIndex > >
to;
typedef RgbValueFromUInt32<
vigra::RGBValue< sal_uInt8,
RedIndex,
GreenIndex,
BlueIndex > >
from;
};
}
#endif /* INCLUDED_BASEBMP_INTCONVERSION_HXX */
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