svdpdf: move Matrix to basegfx just to get it separated

Change-Id: I9d887dc7a2836b90151ef352b47a9b9ad3b6f12b
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/91280
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>

1 files changed, 126 insertions, 0 deletions

diff --git a/include/basegfx/matrix/Matrix.hxx b/include/basegfx/matrix/Matrix.hxx
new file mode 100644
index 000000000000..b742d8cdf293
--- /dev/null
+++ b/include/basegfx/matrix/Matrix.hxx
@@ -0,0 +1,126 @@
+/* -*- 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
+
+class Matrix
+{
+public:
+    Matrix()
+        : Matrix(1, 0, 0, 1, 0, 0)
+    {
+    }
+
+    Matrix(const Matrix& other)
+        : Matrix(other.ma, other.mb, other.mc, other.md, other.me, other.mf)
+    {
+    }
+
+    Matrix(double da, double db, double dc, double dd, double de, double df)
+        : ma(da)
+        , mb(db)
+        , mc(dc)
+        , md(dd)
+        , me(de)
+        , mf(df)
+    {
+    }
+
+    const Matrix& operator=(const Matrix& other)
+    {
+        ma = other.ma;
+        mb = other.mb;
+        mc = other.mc;
+        md = other.md;
+        me = other.me;
+        mf = other.mf;
+        return *this;
+    }
+
+    double a() const { return ma; }
+    double b() const { return mb; }
+    double c() const { return mc; }
+    double d() const { return md; }
+    double e() const { return me; }
+    double f() const { return mf; }
+
+    /// Multiply this * other.
+    void Concatinate(const Matrix& other)
+    {
+        ma = ma * other.ma + mb * other.mc;
+        mb = ma * other.mb + mb * other.md;
+        mc = mc * other.ma + md * other.mc;
+        md = mc * other.mb + md * other.md;
+        me = me * other.ma + mf * other.mc + other.me;
+        mf = me * other.mb + mf * other.md + other.mf;
+    }
+
+    /// Transform the point (x, y) by this Matrix.
+    template <typename T> void Transform(T& x, T& y)
+    {
+        x = ma * x + mc * y + me;
+        y = mb * x + md * y + mf;
+    }
+
+    /// Transform the rectangle (left, right, top, bottom) by this Matrix.
+    template <typename T> void Transform(T& left, T& right, T& top, T& bottom)
+    {
+        T leftTopX = left;
+        T leftTopY = top;
+        Transform(leftTopX, leftTopY);
+
+        T leftBottomX = left;
+        T leftBottomY = bottom;
+        Transform(leftBottomX, leftBottomY);
+
+        T rightTopX = right;
+        T rightTopY = top;
+        Transform(rightTopX, rightTopY);
+
+        T rightBottomX = right;
+        T rightBottomY = bottom;
+        Transform(rightBottomX, rightBottomY);
+
+        left = std::min(leftTopX, leftBottomX);
+        right = std::max(rightTopX, rightBottomX);
+
+        if (top > bottom)
+            top = std::max(leftTopY, rightTopY);
+        else
+            top = std::min(leftTopY, rightTopY);
+
+        if (top > bottom)
+            bottom = std::max(leftBottomY, rightBottomY);
+        else
+            bottom = std::min(leftBottomY, rightBottomY);
+    }
+
+    std::string toString() const
+    {
+        std::ostringstream oss;
+        oss << '(' << ma << ", " << mb << ", " << mc << ", " << md << ", " << me << ", " << mf
+            << ')';
+        return oss.str();
+    }
+
+private:
+    double ma, mb, mc, md, me, mf;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */