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Diffstat (limited to 'basebmp/source/intconversion.hxx')
-rw-r--r-- | basebmp/source/intconversion.hxx | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/basebmp/source/intconversion.hxx b/basebmp/source/intconversion.hxx new file mode 100644 index 000000000000..966f1d3d7583 --- /dev/null +++ b/basebmp/source/intconversion.hxx @@ -0,0 +1,91 @@ +/* -*- 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: */ |