Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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: */