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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 16:51:28 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 16:51:28 +0000 |
commit | 940b4d1848e8c70ab7642901a68594e8016caffc (patch) | |
tree | eb72f344ee6c3d9b80a7ecc079ea79e9fba8676d /slideshow/source/engine/transitions/spiralwipe.cxx | |
parent | Initial commit. (diff) | |
download | libreoffice-upstream.tar.xz libreoffice-upstream.zip |
Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'slideshow/source/engine/transitions/spiralwipe.cxx')
-rw-r--r-- | slideshow/source/engine/transitions/spiralwipe.cxx | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/slideshow/source/engine/transitions/spiralwipe.cxx b/slideshow/source/engine/transitions/spiralwipe.cxx new file mode 100644 index 000000000..3d1dc0282 --- /dev/null +++ b/slideshow/source/engine/transitions/spiralwipe.cxx @@ -0,0 +1,120 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + + +#include "spiralwipe.hxx" +#include "transitiontools.hxx" + +#include <basegfx/matrix/b2dhommatrix.hxx> +#include <basegfx/polygon/b2dpolygon.hxx> +#include <basegfx/numeric/ftools.hxx> +#include <basegfx/matrix/b2dhommatrixtools.hxx> + + +namespace slideshow::internal { + +SpiralWipe::SpiralWipe( sal_Int32 nElements, bool flipOnYAxis ) + : m_elements(nElements), + m_sqrtElements( static_cast<sal_Int32>( + sqrt( static_cast<double>(nElements) ) ) ), + m_flipOnYAxis(flipOnYAxis) +{ +} + +::basegfx::B2DPolyPolygon SpiralWipe::calcNegSpiral( double t ) const +{ + const double area = t * m_elements; + const double e = sqrt(area) / 2.0; + const sal_Int32 edge = static_cast<sal_Int32>(e) * 2; + + basegfx::B2DHomMatrix aTransform(basegfx::utils::createTranslateB2DHomMatrix(-0.5, -0.5)); + const double edge_ = ::basegfx::pruneScaleValue( + static_cast<double>(edge) / m_sqrtElements ); + aTransform.scale( edge_, edge_ ); + aTransform.translate( 0.5, 0.5 ); + ::basegfx::B2DPolygon poly( createUnitRect() ); + poly.transform( aTransform ); + ::basegfx::B2DPolyPolygon res(poly); + + if (! ::basegfx::fTools::equalZero( 1.0 - t )) { + const sal_Int32 edge1 = edge + 1; + sal_Int32 len = static_cast<sal_Int32>( (e - (edge /2)) * edge1 * 4 ); + double w = M_PI_2; + while (len > 0) { + const sal_Int32 alen = std::min(len, edge1); + len -= alen; + poly = createUnitRect(); + aTransform = basegfx::utils::createScaleB2DHomMatrix( + ::basegfx::pruneScaleValue( static_cast<double>(alen) / m_sqrtElements ), + ::basegfx::pruneScaleValue( 1.0 / m_sqrtElements ) ); + aTransform.translate( + - ::basegfx::pruneScaleValue( + static_cast<double>(edge / 2) / m_sqrtElements ), + ::basegfx::pruneScaleValue( + static_cast<double>(edge / 2) / m_sqrtElements ) ); + aTransform.rotate( w ); + w -= M_PI_2; + aTransform.translate( 0.5, 0.5 ); + poly.transform( aTransform ); + res.append(poly); + } + } + + return res; +} + +::basegfx::B2DPolyPolygon SpiralWipe::operator () ( double t ) +{ + ::basegfx::B2DPolyPolygon res( createUnitRect() ); + ::basegfx::B2DPolyPolygon innerSpiral( calcNegSpiral( 1.0 - t ) ); + innerSpiral.flip(); + res.append(innerSpiral); + return m_flipOnYAxis ? flipOnYAxis(res) : res; +} + +::basegfx::B2DPolyPolygon BoxSnakesWipe::operator () ( double t ) +{ + ::basegfx::B2DPolyPolygon res( createUnitRect() ); + ::basegfx::B2DPolyPolygon innerSpiral( calcNegSpiral( 1.0 - t ) ); + innerSpiral.flip(); + + if (m_fourBox) { + ::basegfx::B2DHomMatrix aTransform; + aTransform.scale( 0.5, 0.5 ); + innerSpiral.transform( aTransform ); + res.append(innerSpiral); + res.append( flipOnXAxis(innerSpiral) ); + innerSpiral = flipOnYAxis(innerSpiral); + res.append(innerSpiral); + res.append( flipOnXAxis(innerSpiral) ); + } + else { + ::basegfx::B2DHomMatrix aTransform; + aTransform.scale( 1.0, 0.5 ); + innerSpiral.transform( aTransform ); + res.append(innerSpiral); + res.append( flipOnXAxis(innerSpiral) ); + } + + return m_flipOnYAxis ? flipOnYAxis(res) : res; +} + +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |