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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_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 */
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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