132 lines
4.5 KiB
C++
132 lines
4.5 KiB
C++
/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2000, 2010 Oracle and/or its affiliates.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org 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
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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// MARKER(update_precomp.py): autogen include statement, do not remove
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#include "precompiled_slideshow.hxx"
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#include <canvas/debug.hxx>
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#include "spiralwipe.hxx"
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#include "transitiontools.hxx"
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#include <basegfx/matrix/b2dhommatrix.hxx>
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#include <basegfx/polygon/b2dpolygon.hxx>
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#include <basegfx/numeric/ftools.hxx>
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#include <basegfx/matrix/b2dhommatrixtools.hxx>
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namespace slideshow {
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namespace internal {
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SpiralWipe::SpiralWipe( sal_Int32 nElements, bool flipOnYAxis )
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: m_elements(nElements),
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m_sqrtElements( static_cast<sal_Int32>(
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sqrt( static_cast<double>(nElements) ) ) ),
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m_flipOnYAxis(flipOnYAxis)
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{
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}
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::basegfx::B2DPolyPolygon SpiralWipe::calcNegSpiral( double t ) const
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{
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const double area = (t * m_elements);
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const double e = (sqrt(area) / 2.0);
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const sal_Int32 edge = (static_cast<sal_Int32>(e) * 2);
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basegfx::B2DHomMatrix aTransform(basegfx::tools::createTranslateB2DHomMatrix(-0.5, -0.5));
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const double edge_ = ::basegfx::pruneScaleValue(
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static_cast<double>(edge) / m_sqrtElements );
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aTransform.scale( edge_, edge_ );
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aTransform.translate( 0.5, 0.5 );
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::basegfx::B2DPolygon poly( createUnitRect() );
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poly.transform( aTransform );
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::basegfx::B2DPolyPolygon res(poly);
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if (! ::basegfx::fTools::equalZero( 1.0 - t )) {
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const sal_Int32 edge1 = (edge + 1);
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sal_Int32 len = static_cast<sal_Int32>( (e - (edge /2)) * edge1 * 4 );
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double w = M_PI_2;
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while (len > 0) {
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const sal_Int32 alen = (len > edge1 ? edge1 : len);
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len -= alen;
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poly = createUnitRect();
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aTransform = basegfx::tools::createScaleB2DHomMatrix(
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::basegfx::pruneScaleValue( static_cast<double>(alen) / m_sqrtElements ),
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::basegfx::pruneScaleValue( 1.0 / m_sqrtElements ) );
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aTransform.translate(
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- ::basegfx::pruneScaleValue(
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static_cast<double>(edge / 2) / m_sqrtElements ),
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::basegfx::pruneScaleValue(
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static_cast<double>(edge / 2) / m_sqrtElements ) );
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aTransform.rotate( w );
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w -= M_PI_2;
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aTransform.translate( 0.5, 0.5 );
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poly.transform( aTransform );
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res.append(poly);
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}
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}
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return res;
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}
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::basegfx::B2DPolyPolygon SpiralWipe::operator () ( double t )
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{
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::basegfx::B2DPolyPolygon res( createUnitRect() );
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::basegfx::B2DPolyPolygon innerSpiral( calcNegSpiral( 1.0 - t ) );
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innerSpiral.flip();
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res.append(innerSpiral);
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return m_flipOnYAxis ? flipOnYAxis(res) : res;
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}
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::basegfx::B2DPolyPolygon BoxSnakesWipe::operator () ( double t )
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{
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::basegfx::B2DPolyPolygon res( createUnitRect() );
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::basegfx::B2DPolyPolygon innerSpiral( calcNegSpiral( 1.0 - t ) );
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innerSpiral.flip();
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if (m_fourBox) {
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::basegfx::B2DHomMatrix aTransform;
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aTransform.scale( 0.5, 0.5 );
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innerSpiral.transform( aTransform );
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res.append(innerSpiral);
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res.append( flipOnXAxis(innerSpiral) );
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innerSpiral = flipOnYAxis(innerSpiral);
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res.append(innerSpiral);
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res.append( flipOnXAxis(innerSpiral) );
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}
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else {
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::basegfx::B2DHomMatrix aTransform;
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aTransform.scale( 1.0, 0.5 );
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innerSpiral.transform( aTransform );
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res.append(innerSpiral);
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res.append( flipOnXAxis(innerSpiral) );
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}
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return m_flipOnYAxis ? flipOnYAxis(res) : res;
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}
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}
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}
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