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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/snakewipe.cxx | |
parent | Initial commit. (diff) | |
download | libreoffice-upstream/1%7.0.4.tar.xz libreoffice-upstream/1%7.0.4.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/snakewipe.cxx')
-rw-r--r-- | slideshow/source/engine/transitions/snakewipe.cxx | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/slideshow/source/engine/transitions/snakewipe.cxx b/slideshow/source/engine/transitions/snakewipe.cxx new file mode 100644 index 000000000..ceaa1d001 --- /dev/null +++ b/slideshow/source/engine/transitions/snakewipe.cxx @@ -0,0 +1,238 @@ +/* -*- 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 <sal/config.h> + +#include <cmath> + +#include <o3tl/temporary.hxx> +#include <osl/diagnose.h> +#include <basegfx/matrix/b2dhommatrix.hxx> +#include <basegfx/point/b2dpoint.hxx> +#include <basegfx/polygon/b2dpolygon.hxx> +#include <basegfx/matrix/b2dhommatrixtools.hxx> +#include "snakewipe.hxx" +#include "transitiontools.hxx" + + +namespace slideshow::internal { + +SnakeWipe::SnakeWipe( sal_Int32 nElements, bool diagonal, bool flipOnYAxis ) + : m_sqrtElements( static_cast<sal_Int32>( + sqrt( static_cast<double>(nElements) ) ) ), + m_elementEdge( 1.0 / m_sqrtElements ), + m_diagonal(diagonal), + m_flipOnYAxis(flipOnYAxis) +{ +} + +::basegfx::B2DPolyPolygon SnakeWipe::calcSnake( double t ) const +{ + ::basegfx::B2DPolyPolygon res; + const double area = t * m_sqrtElements * m_sqrtElements; + const sal_Int32 line_ = static_cast<sal_Int32>(area) / m_sqrtElements; + const double line = ::basegfx::pruneScaleValue( + static_cast<double>(line_) / m_sqrtElements ); + const double col = ::basegfx::pruneScaleValue( + (area - (line_ * m_sqrtElements)) / m_sqrtElements ); + + if (! ::basegfx::fTools::equalZero( line )) { + ::basegfx::B2DPolygon poly; + poly.append( ::basegfx::B2DPoint( 0.0, 0.0 ) ); + poly.append( ::basegfx::B2DPoint( 0.0, line ) ); + poly.append( ::basegfx::B2DPoint( 1.0, line ) ); + poly.append( ::basegfx::B2DPoint( 1.0, 0.0 ) ); + poly.setClosed(true); + res.append(poly); + } + if (! ::basegfx::fTools::equalZero( col )) + { + double offset = 0.0; + if ((line_ & 1) == 1) { + // odd line: => right to left + offset = (1.0 - col); + } + ::basegfx::B2DPolygon poly; + poly.append( ::basegfx::B2DPoint( offset, line ) ); + poly.append( ::basegfx::B2DPoint( offset, + line + m_elementEdge ) ); + poly.append( ::basegfx::B2DPoint( offset + col, + line + m_elementEdge ) ); + poly.append( ::basegfx::B2DPoint( offset + col, line ) ); + poly.setClosed(true); + res.append(poly); + } + + return res; +} + +::basegfx::B2DPolyPolygon SnakeWipe::calcHalfDiagonalSnake( + double t, bool in ) const +{ + ::basegfx::B2DPolyPolygon res; + + if (in) { + const double sqrtArea2 = sqrt( t * m_sqrtElements * m_sqrtElements ); + const double edge = ::basegfx::pruneScaleValue( + std::trunc(sqrtArea2) / + m_sqrtElements ); + + ::basegfx::B2DPolygon poly; + if (! ::basegfx::fTools::equalZero( edge )) { + poly.append( ::basegfx::B2DPoint( 0.0, 0.0 ) ); + poly.append( ::basegfx::B2DPoint( 0.0, edge ) ); + poly.append( ::basegfx::B2DPoint( edge, 0.0 ) ); + poly.setClosed(true); + res.append(poly); + } + const double a = M_SQRT1_2 / m_sqrtElements; + const double d = std::modf(sqrtArea2, &o3tl::temporary(double())); + const double len = t * M_SQRT2 * d; + const double height = ::basegfx::pruneScaleValue( M_SQRT1_2 / m_sqrtElements ); + poly.clear(); + poly.append( ::basegfx::B2DPoint( 0.0, 0.0 ) ); + poly.append( ::basegfx::B2DPoint( 0.0, height ) ); + poly.append( ::basegfx::B2DPoint( len + a, height ) ); + poly.append( ::basegfx::B2DPoint( len + a, 0.0 ) ); + poly.setClosed(true); + ::basegfx::B2DHomMatrix aTransform; + + if ((static_cast<sal_Int32>(sqrtArea2) & 1) == 1) + { + // odd line + aTransform = basegfx::utils::createRotateB2DHomMatrix(M_PI_2 + M_PI_4); + aTransform.translate(edge + m_elementEdge, 0.0); + } + else + { + aTransform = basegfx::utils::createTranslateB2DHomMatrix(-a, 0.0); + aTransform.rotate( -M_PI_4 ); + aTransform.translate( 0.0, edge ); + } + + poly.transform( aTransform ); + res.append(poly); + } + else // out + { + const double sqrtArea2 = sqrt( t * m_sqrtElements * m_sqrtElements ); + const double edge = ::basegfx::pruneScaleValue( + std::trunc(sqrtArea2) / + m_sqrtElements ); + + ::basegfx::B2DPolygon poly; + if (! ::basegfx::fTools::equalZero( edge )) { + poly.append( ::basegfx::B2DPoint( 0.0, 1.0 ) ); + poly.append( ::basegfx::B2DPoint( edge, 1.0 ) ); + poly.append( ::basegfx::B2DPoint( 1.0, edge ) ); + poly.append( ::basegfx::B2DPoint( 1.0, 0.0 ) ); + poly.setClosed(true); + res.append(poly); + } + const double a = M_SQRT1_2 / m_sqrtElements; + const double d = std::modf(sqrtArea2, &o3tl::temporary(double())); + const double len = (1.0 - t) * M_SQRT2 * d; + const double height = ::basegfx::pruneScaleValue( M_SQRT1_2 / m_sqrtElements ); + poly.clear(); + poly.append( ::basegfx::B2DPoint( 0.0, 0.0 ) ); + poly.append( ::basegfx::B2DPoint( 0.0, height ) ); + poly.append( ::basegfx::B2DPoint( len + a, height ) ); + poly.append( ::basegfx::B2DPoint( len + a, 0.0 ) ); + poly.setClosed(true); + ::basegfx::B2DHomMatrix aTransform; + + if ((static_cast<sal_Int32>(sqrtArea2) & 1) == 1) + { + // odd line + aTransform = basegfx::utils::createTranslateB2DHomMatrix(0.0, -height); + aTransform.rotate( M_PI_2 + M_PI_4 ); + aTransform.translate( 1.0, edge ); + } + else + { + aTransform = basegfx::utils::createRotateB2DHomMatrix(-M_PI_4); + aTransform.translate( edge, 1.0 ); + } + poly.transform( aTransform ); + res.append(poly); + } + + return res; +} + +::basegfx::B2DPolyPolygon SnakeWipe::operator () ( double t ) +{ + ::basegfx::B2DPolyPolygon res; + if (m_diagonal) + { + if (t >= 0.5) { + res.append( calcHalfDiagonalSnake( 1.0, true ) ); + res.append( calcHalfDiagonalSnake( 2.0 * (t - 0.5), false ) ); + } + else + res.append( calcHalfDiagonalSnake( 2.0 * t, true ) ); + } + else + res = calcSnake(t); + + return m_flipOnYAxis ? flipOnYAxis(res) : res; +} + +::basegfx::B2DPolyPolygon ParallelSnakesWipe::operator () ( double t ) +{ + ::basegfx::B2DPolyPolygon res; + if (m_diagonal) + { + OSL_ASSERT( m_opposite ); + ::basegfx::B2DPolyPolygon half( + calcHalfDiagonalSnake( t, false /* out */ ) ); + // flip on x axis and rotate 90 degrees: + basegfx::B2DHomMatrix aTransform(basegfx::utils::createScaleB2DHomMatrix(1.0, -1.0)); + aTransform.translate( -0.5, 0.5 ); + aTransform.rotate( M_PI_2 ); + aTransform.translate( 0.5, 0.5 ); + half.transform( aTransform ); + half.flip(); + res.append( half ); + + // rotate 180 degrees: + aTransform = basegfx::utils::createTranslateB2DHomMatrix(-0.5, -0.5); + aTransform.rotate( M_PI ); + aTransform.translate( 0.5, 0.5 ); + half.transform( aTransform ); + res.append( half ); + } + else + { + ::basegfx::B2DPolyPolygon half( calcSnake( t / 2.0 ) ); + // rotate 90 degrees: + basegfx::B2DHomMatrix aTransform(basegfx::utils::createTranslateB2DHomMatrix(-0.5, -0.5)); + aTransform.rotate( M_PI_2 ); + aTransform.translate( 0.5, 0.5 ); + half.transform( aTransform ); + res.append( flipOnYAxis(half) ); + res.append( m_opposite ? flipOnXAxis(half) : half ); + } + + return m_flipOnYAxis ? flipOnYAxis(res) : res; +} + +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |