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-rw-r--r--basebmp/source/intconversion.hxx98
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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);
- }
- };
-
- //Current c++0x draft (apparently) has std::identity, but not operator()
- template<typename T> struct SGI_identity : public std::unary_function<T,T>
- {
- T& operator()(T& x) const { return x; }
- const T& operator()(const T& x) const { return x; }
- };
-
- /// Get converter from given data type to sal_uInt32
- template< typename DataType > struct uInt32Converter
- {
- typedef SGI_identity<DataType> to;
- typedef SGI_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: */