b0a8cac914
2007/02/02 08:47:51 thb 1.5.12.2: #i37778# Moved all old-style casts to sal::static_int_cast 2007/01/29 14:01:59 thb 1.5.12.1: Issue number: #i37778# Larger slideshow refactoring. Wrote design and coding style manifest, and adapted the code to actually conform to this. In detail: - cleaned up ownership/disposable/weak_ptr story. removed hacks and explicit Disposable implementations, where workaround were available - removed object mutices, where superfluous - reworked EventMultiplexer (using templatized listener class now), added more events. EventMultiplexer now serves as a true blackboard - reworked directory structure: disjunct parts are now physically separated into directories, instantiation happens via factories & abstract interfaces - added CursorManager, to make setting mouse cursor less hackish - reworked DrawShape, to implement SeparateListener pattern - reworked IntrinsicAnimationActivity, to avoid cyclic references - modified hyperlink & shape cursor handling to communicate via EventMultiplexer - renamed & cleaned up files (presentation.cxx now named slideshowimpl.cxx, etc.) - added first version of the z-order fix to layer/layermanager - cleaned up include guards and include syntax
196 lines
8.2 KiB
C++
196 lines
8.2 KiB
C++
/*************************************************************************
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* $RCSfile: interpolation.hxx,v $
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*
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* $Revision: 1.6 $
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*
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* last change: $Author: obo $ $Date: 2007-07-17 14:45:46 $
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*
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* The Contents of this file are made available subject to
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* the terms of GNU Lesser General Public License Version 2.1.
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*
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*
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* GNU Lesser General Public License Version 2.1
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* =============================================
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* Copyright 2005 by Sun Microsystems, Inc.
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* 901 San Antonio Road, Palo Alto, CA 94303, USA
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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************************************************************************/
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#ifndef INCLUDED_SLIDESHOW_INTERPOLATION_HXX
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#define INCLUDED_SLIDESHOW_INTERPOLATION_HXX
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#include "lerp.hxx"
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namespace slideshow
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{
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namespace internal
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{
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// Interpolator specializations
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// ============================
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// NOTE: generic lerp is included from lerp.hxx. Following
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// are some specializations for various
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// not-straight-forward-interpolatable types
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/// Specialization for RGBColor, to employ color-specific interpolator
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template<> RGBColor lerp< RGBColor >( const RGBColor& rFrom,
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const RGBColor& rTo,
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double t )
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{
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return interpolate( rFrom, rTo, t );
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}
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/// Specialization also for sal_Int16, although this code should not be called
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template<> sal_Int16 lerp< sal_Int16 >( const sal_Int16&,
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const sal_Int16& rTo,
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double )
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{
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OSL_ENSURE( false,
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"lerp<sal_Int16> called" );
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return rTo;
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}
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/// Specialization also for string, although this code should not be called
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template<> ::rtl::OUString lerp< ::rtl::OUString >( const ::rtl::OUString&,
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const ::rtl::OUString& rTo,
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double )
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{
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OSL_ENSURE( false,
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"lerp<::rtl::OUString> called" );
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return rTo;
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}
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/// Specialization also for bool, although this code should not be called
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template<> bool lerp< bool >( const bool&,
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const bool& rTo,
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double )
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{
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OSL_ENSURE( false,
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"lerp<bool> called" );
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return rTo;
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}
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template< typename ValueType > struct Interpolator
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{
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ValueType operator()( const ValueType& rFrom,
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const ValueType& rTo,
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double t ) const
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{
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return lerp( rFrom, rTo, t );
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}
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};
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/// Specialization for HSLColor, to employ color-specific interpolator
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template<> struct Interpolator< HSLColor >
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{
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Interpolator( bool bCCW ) :
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mbCCW( bCCW )
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{
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}
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HSLColor operator()( const HSLColor& rFrom,
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const HSLColor& rTo,
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double t ) const
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{
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return interpolate( rFrom, rTo, t, mbCCW );
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}
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private:
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/// When true: interpolate counter-clockwise
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const bool mbCCW;
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};
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/** Generic linear interpolator
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@tpl ValueType
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Must have operator+ and operator* defined, and should
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have value semantics.
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@param rInterpolator
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Interpolator to use for lerp
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@param nFrame
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Must be in the [0,nTotalFrames) range
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@param nTotalFrames
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Total number of frames. Should be greater than zero.
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*/
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template< typename ValueType > ValueType lerp( const Interpolator< ValueType >& rInterpolator,
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const ValueType& rFrom,
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const ValueType& rTo,
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sal_uInt32 nFrame,
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::std::size_t nTotalFrames )
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{
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// TODO(P1): There's a nice HAKMEM trick for that
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// nTotalFrames > 1 condition below
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// for 1 and 0 frame animations, always take end value
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const double nFraction( nTotalFrames > 1 ? double(nFrame)/(nTotalFrames-1) : 1.0 );
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return rInterpolator( rFrom, rTo, nFraction );
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}
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/// Specialization for non-interpolatable constants/enums
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template<> sal_Int16 lerp< sal_Int16 >( const Interpolator< sal_Int16 >& /*rInterpolator*/,
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const sal_Int16& rFrom,
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const sal_Int16& rTo,
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sal_uInt32 nFrame,
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::std::size_t nTotalFrames )
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{
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// until one half of the total frames are over, take from value.
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// after that, take to value.
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// For nFrames not divisable by 2, we prefer to over from, which
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// also neatly yields to for 1 frame activities
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return nFrame < nTotalFrames/2 ? rFrom : rTo;
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}
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/// Specialization for non-interpolatable strings
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template<> ::rtl::OUString lerp< ::rtl::OUString >( const Interpolator< ::rtl::OUString >& /*rInterpolator*/,
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const ::rtl::OUString& rFrom,
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const ::rtl::OUString& rTo,
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sal_uInt32 nFrame,
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::std::size_t nTotalFrames )
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{
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// until one half of the total frames are over, take from value.
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// after that, take to value.
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// For nFrames not divisable by 2, we prefer to over from, which
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// also neatly yields to for 1 frame activities
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return nFrame < nTotalFrames/2 ? rFrom : rTo;
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}
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/// Specialization for non-interpolatable bools
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template<> bool lerp< bool >( const Interpolator< bool >& /*rInterpolator*/,
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const bool& bFrom,
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const bool& bTo,
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sal_uInt32 nFrame,
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::std::size_t nTotalFrames )
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{
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// until one half of the total frames are over, take from value.
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// after that, take to value.
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// For nFrames not divisable by 2, we prefer to over from, which
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// also neatly yields to for 1 frame activities
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return nFrame < nTotalFrames/2 ? bFrom : bTo;
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}
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}
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}
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#endif /* INCLUDED_SLIDESHOW_INTERPOLATION_HXX */
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