1 files changed, 84 insertions, 0 deletions
diff --git a/basegfx/source/workbench/bezierclip.hxx b/basegfx/source/workbench/bezierclip.hxx
new file mode 100644
index 000000000..54cceb414
--- /dev/null
+++ b/basegfx/source/workbench/bezierclip.hxx
@@ -0,0 +1,84 @@
+/* -*- 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 <vector>
+
+struct Point2D
+{
+    typedef double value_type;
+    Point2D( double _x, double _y ) : x(_x), y(_y) {}
+    Point2D() : x(), y() {}
+    double x;
+    double y;
+};
+
+struct Bezier
+{
+    Point2D p0;
+    Point2D p1;
+    Point2D p2;
+    Point2D p3;
+
+    Point2D&        operator[]( int i ) { return reinterpret_cast<Point2D*>(this)[i]; }
+    const Point2D&  operator[]( int i ) const { return reinterpret_cast<const Point2D*>(this)[i]; }
+};
+
+struct FatLine
+{
+    // line L through p1 and p4 in normalized implicit form
+    double a;
+    double b;
+    double c;
+
+    // the upper and lower distance from this line
+    double dMin;
+    double dMax;
+};
+
+template <typename DataType> DataType calcLineDistance( const DataType& a,
+                                                        const DataType& b,
+                                                        const DataType& c,
+                                                        const DataType& x,
+                                                        const DataType& y )
+{
+    return a*x + b*y + c;
+}
+
+typedef std::vector< Point2D > Polygon2D;
+
+/* little abs template */
+template <typename NumType> NumType absval( NumType x )
+{
+    return x<0 ? -x : x;
+}
+
+Polygon2D convexHull( const Polygon2D& rPoly );
+
+// TODO: find proper epsilon here (try std::numeric_limits<NumType>::epsilon()?)!
+constexpr auto DBL_EPSILON = 1.0e-100;
+
+/* little approximate comparisons */
+template <typename NumType> bool tolZero( NumType n ) { return fabs(n) < DBL_EPSILON; }
+template <typename NumType> bool tolEqual( NumType n1, NumType n2 ) { return tolZero(n1-n2); }
+template <typename NumType> bool tolLessEqual( NumType n1, NumType n2 ) { return tolEqual(n1,n2) || n1<n2; }
+template <typename NumType> bool tolGreaterEqual( NumType n1, NumType n2 ) { return tolEqual(n1,n2) || n1>n2; }
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */