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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 05:54:39 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 05:54:39 +0000
commit267c6f2ac71f92999e969232431ba04678e7437e (patch)
tree358c9467650e1d0a1d7227a21dac2e3d08b622b2 /include/basegfx/matrix/b2dhommatrix.hxx
parentInitial commit. (diff)
downloadlibreoffice-267c6f2ac71f92999e969232431ba04678e7437e.tar.xz
libreoffice-267c6f2ac71f92999e969232431ba04678e7437e.zip
Adding upstream version 4:24.2.0.upstream/4%24.2.0
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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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 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <ostream>
+
+#include <sal/types.h>
+#include <basegfx/basegfxdllapi.h>
+#include <array>
+
+namespace basegfx
+{
+ class B2DTuple;
+
+ class SAL_WARN_UNUSED BASEGFX_DLLPUBLIC B2DHomMatrix
+ {
+ private:
+ // Since this is a graphics matrix, the last row is always 0 0 1, so we don't bother to store it.
+ std::array<std::array<double, 3>, 2> mfValues {
+ std::array<double, 3>{ 1.0, 0.0, 0.0 },
+ std::array<double, 3>{ 0.0, 1.0, 0.0 } };
+
+ public:
+ constexpr B2DHomMatrix() = default;
+
+ /** constructor to allow setting all needed values for a 3x2 matrix at once. The
+ parameter f_0x1 e.g. is the same as using set(0, 1, f)
+ */
+ constexpr B2DHomMatrix(double f_0x0, double f_0x1, double f_0x2, double f_1x0, double f_1x1, double f_1x2)
+ {
+ mfValues[0][0] = f_0x0;
+ mfValues[0][1] = f_0x1;
+ mfValues[0][2] = f_0x2;
+ mfValues[1][0] = f_1x0;
+ mfValues[1][1] = f_1x1;
+ mfValues[1][2] = f_1x2;
+ }
+
+ /** Convenience creator for declaration of the matrix that is commonly
+ used by web standards (SVG, CSS, HTML).
+
+ Values a,b,c,d,e,f represent the following values in the matrix:
+ [a,c,e] [a,c,e]
+ [b,d,f] or [b,d,f]
+ [0,0,1]
+
+ */
+ static B2DHomMatrix abcdef(double da, double db, double dc, double dd, double de, double df)
+ {
+ return B2DHomMatrix(da, dc, de, db, dd, df);
+ }
+
+ // Convenience accessor for value at 0,0 position in the matrix
+ double a() const { return get(0,0); }
+ // Convenience accessor for value at 1,0 position in the matrix
+ double b() const { return get(1,0); }
+ // Convenience accessor for value at 0,1 position in the matrix
+ double c() const { return get(0,1); }
+ // Convenience accessor for value at 1,1 position in the matrix
+ double d() const { return get(1,1); }
+ // Convenience accessor for value at 0,2 position in the matrix
+ double e() const { return get(0,2); }
+ // Convenience accessor for value at 1,2 position in the matrix
+ double f() const { return get(1,2); }
+
+ double get(sal_uInt16 nRow, sal_uInt16 nColumn) const
+ {
+ return mfValues[nRow][nColumn];
+ }
+
+ void set(sal_uInt16 nRow, sal_uInt16 nColumn, double fValue)
+ {
+ mfValues[nRow][nColumn] = fValue;
+ }
+
+ /** allow setting all needed values for a 3x2 matrix in one call. The
+ parameter f_0x1 e.g. is the same as using set(0, 1, f)
+ */
+ void set3x2(double f_0x0, double f_0x1, double f_0x2, double f_1x0, double f_1x1, double f_1x2);
+
+ // reset to a standard matrix
+ bool isIdentity() const;
+ void identity();
+
+ bool isInvertible() const;
+ bool invert();
+
+ void rotate(double fRadiant);
+
+ void translate(double fX, double fY);
+ void translate(const B2DTuple& rTuple);
+
+ void scale(double fX, double fY);
+ void scale(const B2DTuple& rTuple);
+
+ // Shearing-Matrices
+ void shearX(double fSx);
+ void shearY(double fSy);
+
+ bool operator==(const B2DHomMatrix& rMat) const;
+ bool operator!=(const B2DHomMatrix& rMat) const;
+
+ // matrix multiplication from the left to the local
+ B2DHomMatrix& operator*=(const B2DHomMatrix& rMat);
+
+ /**
+ * Help routine to decompose given homogen 3x3 matrix to components. A correction of the
+ * components is done to avoid inaccuracies.
+ *
+ * See basegfx::utils::createScaleShearXRotateTranslateB2DHomMatrix() for the opposite, to
+ * compose a homogen 3x3 matrix from components.
+ */
+ bool decompose(B2DTuple& rScale, B2DTuple& rTranslate, double& rRotate, double& rShearX) const;
+
+ private:
+ void computeAdjoint(double (&dst)[6]) const;
+ double computeDeterminant(double (&dst)[6]) const;
+ void doMulMatrix(const B2DHomMatrix& rMat);
+ };
+
+ inline B2DHomMatrix operator*(const B2DHomMatrix& rMatA, const B2DHomMatrix& rMatB)
+ {
+ B2DHomMatrix aMul(rMatB);
+ aMul *= rMatA;
+ return aMul;
+ }
+
+ template<typename charT, typename traits>
+ std::basic_ostream<charT, traits> & operator <<(
+ std::basic_ostream<charT, traits> & stream, B2DHomMatrix const & matrix)
+ {
+ return stream
+ << '[' << matrix.get(0, 0) << ' ' << matrix.get(0, 1) << ' '
+ << matrix.get(0, 2) << "; " << matrix.get(1, 0) << ' '
+ << matrix.get(1, 1) << ' ' << matrix.get(1, 2) << ']';
+ }
+} // end of namespace basegfx
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */