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diff --git a/source/blender/freestyle/intern/stroke/AdvancedFunctions0D.cpp b/source/blender/freestyle/intern/stroke/AdvancedFunctions0D.cpp
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+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2010 Blender Foundation.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): none yet.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+/** \file blender/freestyle/intern/stroke/AdvancedFunctions0D.cpp
+ *  \ingroup freestyle
+ *  \brief Functions taking 0D input
+ *  \author Stephane Grabli
+ *  \author Emmanuel Turquin
+ *  \date 01/07/2003
+ */
+
+#include "AdvancedFunctions0D.h"
+#include "Canvas.h"
+
+#include "../view_map/Functions0D.h"
+#include "../view_map/SteerableViewMap.h"
+
+namespace Functions0D {
+
+int DensityF0D::operator()(Interface0DIterator& iter)
+{
+	Canvas* canvas = Canvas::getInstance();
+	int bound = _filter.getBound();
+
+	if ((iter->getProjectedX()-bound < 0) || (iter->getProjectedX()+bound>canvas->width()) ||
+	    (iter->getProjectedY()-bound < 0) || (iter->getProjectedY()+bound>canvas->height())) {
+		result = 0.0;
+		return 0;
+	}
+
+	RGBImage image;
+	canvas->readColorPixels((int)iter->getProjectedX() - bound, (int)iter->getProjectedY() - bound,
+	                        _filter.maskSize(), _filter.maskSize(), image);
+	result = _filter.getSmoothedPixel<RGBImage>(&image, (int)iter->getProjectedX(), (int)iter->getProjectedY());
+
+	return 0;
+}
+
+
+int LocalAverageDepthF0D::operator()(Interface0DIterator& iter)
+{
+	Canvas * iViewer = Canvas::getInstance();
+	int bound = _filter.getBound();
+
+	if ((iter->getProjectedX()-bound < 0) || (iter->getProjectedX()+bound>iViewer->width()) ||
+	    (iter->getProjectedY()-bound < 0) || (iter->getProjectedY()+bound>iViewer->height())) {
+		result = 0.0;
+		return 0;
+	}
+
+	GrayImage image;
+	iViewer->readDepthPixels((int)iter->getProjectedX() - bound, (int)iter->getProjectedY()-bound,
+	                         _filter.maskSize(), _filter.maskSize(), image);
+	result = _filter.getSmoothedPixel(&image, (int)iter->getProjectedX(), (int)iter->getProjectedY());
+
+	return 0;
+}
+
+int ReadMapPixelF0D::operator()(Interface0DIterator& iter)
+{
+	Canvas * canvas = Canvas::getInstance();
+	result = canvas->readMapPixel(_mapName, _level, (int)iter->getProjectedX(), (int)iter->getProjectedY());
+	return 0;
+}
+
+int ReadSteerableViewMapPixelF0D::operator()(Interface0DIterator& iter)
+{
+	SteerableViewMap *svm = Canvas::getInstance()->getSteerableViewMap();
+	result = svm->readSteerableViewMapPixel(_orientation, _level, (int)iter->getProjectedX(),
+	                                        (int)iter->getProjectedY());
+	return 0;
+}
+
+int ReadCompleteViewMapPixelF0D::operator()(Interface0DIterator& iter)
+{
+	SteerableViewMap *svm = Canvas::getInstance()->getSteerableViewMap();
+	result = svm->readCompleteViewMapPixel(_level,(int)iter->getProjectedX(), (int)iter->getProjectedY());
+	return 0;
+}
+
+int GetViewMapGradientNormF0D::operator()(Interface0DIterator& iter)
+{
+	SteerableViewMap *svm = Canvas::getInstance()->getSteerableViewMap();
+	float pxy = svm->readCompleteViewMapPixel(_level, (int)iter->getProjectedX(), (int)iter->getProjectedY());
+	float gx = svm->readCompleteViewMapPixel(_level, (int)iter->getProjectedX() + _step, (int)iter->getProjectedY())
+	           - pxy;
+	float gy = svm->readCompleteViewMapPixel(_level, (int)iter->getProjectedX(), (int)iter->getProjectedY() + _step)
+	           - pxy;
+	result = Vec2f(gx, gy).norm();
+	return 0;
+}
+
+} // end of namespace Functions0D