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diff --git a/src/svg_import_util.h b/src/svg_import_util.h
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+/*
+ * This program source code file is part of KICAD, a free EDA CAD application.
+ *
+ * Copyright (C) 2021 Jan Sebastian Götte <kicad@jaseg.de>
+ * Copyright (C) 2021 KiCad Developers, see AUTHORS.txt for contributors.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#ifndef SVG_IMPORT_UTIL_H
+#define SVG_IMPORT_UTIL_H
+
+#include <math.h>
+#include <cmath>
+#include <stdlib.h>
+#include <assert.h>
+#include <limits>
+#include <vector>
+#include <string>
+#include <iostream>
+#include <sstream>
+#include <regex>
+
+#include <pango/pangocairo.h>
+#include <cairo-svg.h>
+
+#include <clipper.hpp>
+#include "cairo_clipper.hpp"
+
+#include <pugixml.hpp>
+
+#include "svg_import_defs.h"
+
+namespace svg_plugin {
+
+/* Coordinate system selection for things like "patternContentUnits" */
+enum RelativeUnits {
+    SVG_UnknownUnits = 0,
+    SVG_UserSpaceOnUse,
+    SVG_ObjectBoundingBox,
+};
+
+void print_matrix(cairo_t *cr, bool print_examples=false);
+double usvg_double_attr(const pugi::xml_node &node, const char *attr, double default_value=0.0);
+std::string usvg_id_url(std::string attr);
+RelativeUnits map_str_to_units(std::string str, RelativeUnits default_val=SVG_UnknownUnits);
+void load_cairo_matrix_from_svg(const std::string &transform, cairo_matrix_t &mat);
+void apply_cairo_transform_from_svg(cairo_t *cr, const std::string &transform);
+std::string parse_data_iri(const std::string &data_url);
+void apply_viewport_matrix(cairo_t *cr, cairo_matrix_t &viewport_matrix);
+
+} /* namespace svg_plugin */
+
+#endif /* SVG_IMPORT_UTIL_H */