1 files changed, 51 insertions, 0 deletions
diff --git a/vcl/inc/pdf/Matrix3.hxx b/vcl/inc/pdf/Matrix3.hxx
new file mode 100644
index 000000000..795b2af4b
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+++ b/vcl/inc/pdf/Matrix3.hxx
@@ -0,0 +1,51 @@
+/* -*- 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/.
+ *
+ */
+
+#pragma once
+
+#include <vcl/dllapi.h>
+#include <tools/gen.hxx>
+
+namespace vcl::pdf
+{
+// matrix helper class
+// TODO: use basegfx matrix class instead or derive from it
+
+/*  for sparse matrices of the form (2D linear transformations)
+ *  f[0] f[1] 0
+ *  f[2] f[3] 0
+ *  f[4] f[5] 1
+ */
+class Matrix3
+{
+    double f[6];
+
+    void set(const double* pn)
+    {
+        for (int i = 0; i < 6; i++)
+            f[i] = pn[i];
+    }
+
+public:
+    Matrix3();
+
+    void skew(double alpha, double beta);
+    void scale(double sx, double sy);
+    void rotate(double angle);
+    void translate(double tx, double ty);
+    void invert();
+
+    double get(size_t i) const { return f[i]; }
+
+    Point transform(const Point& rPoint) const;
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */