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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
+
+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: */