1 files changed, 153 insertions, 0 deletions
diff --git a/include/basegfx/matrix/b2dhommatrix.hxx b/include/basegfx/matrix/b2dhommatrix.hxx
new file mode 100644
index 000000000..d7fa5b442
--- /dev/null
+++ b/include/basegfx/matrix/b2dhommatrix.hxx
@@ -0,0 +1,153 @@
+/* -*- 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 <o3tl/cow_wrapper.hxx>
+#include <basegfx/basegfxdllapi.h>
+
+namespace basegfx
+{
+    class B2DTuple;
+    class Impl2DHomMatrix;
+
+    class SAL_WARN_UNUSED BASEGFX_DLLPUBLIC B2DHomMatrix
+    {
+    public:
+        typedef o3tl::cow_wrapper< Impl2DHomMatrix > ImplType;
+
+    private:
+        ImplType                                     mpImpl;
+
+    public:
+        B2DHomMatrix();
+        B2DHomMatrix(const B2DHomMatrix& rMat);
+        B2DHomMatrix(B2DHomMatrix&& rMat);
+        ~B2DHomMatrix();
+
+        /** 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); }
+
+        /** 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)
+         */
+        B2DHomMatrix(double f_0x0, double f_0x1, double f_0x2, double f_1x0, double f_1x1, double f_1x2);
+
+        double get(sal_uInt16 nRow, sal_uInt16 nColumn) const;
+        void set(sal_uInt16 nRow, sal_uInt16 nColumn, double 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);
+
+        // test if last line is default to see if last line needs to be
+        // involved in calculations
+        bool isLastLineDefault() const;
+
+        // 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);
+
+        B2DHomMatrix& operator+=(const B2DHomMatrix& rMat);
+        B2DHomMatrix& operator-=(const B2DHomMatrix& rMat);
+
+        bool operator==(const B2DHomMatrix& rMat) const;
+        bool operator!=(const B2DHomMatrix& rMat) const;
+
+        B2DHomMatrix& operator*=(double fValue);
+        B2DHomMatrix& operator/=(double fValue);
+
+        // matrix multiplication from the left to the local
+        B2DHomMatrix& operator*=(const B2DHomMatrix& rMat);
+
+        // assignment operator
+        B2DHomMatrix& operator=(const B2DHomMatrix& rMat);
+        B2DHomMatrix& operator=(B2DHomMatrix&& rMat);
+
+        // Help routine to decompose given homogen 3x3 matrix to components. A correction of
+        // the components is done to avoid inaccuracies.
+        bool decompose(B2DTuple& rScale, B2DTuple& rTranslate, double& rRotate, double& rShearX) const;
+    };
+
+    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) << "; "
+            << matrix.get(2, 0) << ' ' << matrix.get(2, 1) << ' '
+            << matrix.get(2, 2) << ']';
+    }
+} // end of namespace basegfx
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */