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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 16:51:28 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 16:51:28 +0000
commit940b4d1848e8c70ab7642901a68594e8016caffc (patch)
treeeb72f344ee6c3d9b80a7ecc079ea79e9fba8676d /slideshow/source/engine/transitions/spiralwipe.cxx
parentInitial commit. (diff)
downloadlibreoffice-940b4d1848e8c70ab7642901a68594e8016caffc.tar.xz
libreoffice-940b4d1848e8c70ab7642901a68594e8016caffc.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')
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1 files changed, 120 insertions, 0 deletions
diff --git a/slideshow/source/engine/transitions/spiralwipe.cxx b/slideshow/source/engine/transitions/spiralwipe.cxx
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+/* -*- 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: */