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// SPDX-License-Identifier: GPL-2.0-or-later
#ifndef SEEN_NR_FILTER_GAUSSIAN_H
#define SEEN_NR_FILTER_GAUSSIAN_H
/*
* Gaussian blur renderer
*
* Authors:
* Niko Kiirala <niko@kiirala.com>
* bulia byak
* Jasper van de Gronde <th.v.d.gronde@hccnet.nl>
*
* Copyright (C) 2006 authors
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include <2geom/forward.h>
#include "display/nr-filter-primitive.h"
enum {
BLUR_QUALITY_BEST = 2,
BLUR_QUALITY_BETTER = 1,
BLUR_QUALITY_NORMAL = 0,
BLUR_QUALITY_WORSE = -1,
BLUR_QUALITY_WORST = -2
};
namespace Inkscape {
namespace Filters {
class FilterGaussian : public FilterPrimitive {
public:
FilterGaussian();
static FilterPrimitive *create();
~FilterGaussian() override;
void render_cairo(FilterSlot &slot) override;
void area_enlarge(Geom::IntRect &area, Geom::Affine const &m) override;
bool can_handle_affine(Geom::Affine const &m) override;
double complexity(Geom::Affine const &ctm) override;
/**
* Set the standard deviation value for gaussian blur. Deviation along
* both axis is set to the provided value.
* Negative value, NaN and infinity are considered an error and no
* changes to filter state are made. If not set, default value of zero
* is used, which means the filter results in transparent black image.
*/
void set_deviation(double deviation);
/**
* Set the standard deviation value for gaussian blur. First parameter
* sets the deviation alogn x-axis, second along y-axis.
* Negative value, NaN and infinity are considered an error and no
* changes to filter state are made. If not set, default value of zero
* is used, which means the filter results in transparent black image.
*/
void set_deviation(double x, double y);
Glib::ustring name() override { return Glib::ustring("Gaussian Blur"); }
private:
double _deviation_x;
double _deviation_y;
};
} /* namespace Filters */
} /* namespace Inkscape */
#endif /* __NR_FILTER_GAUSSIAN_H__ */
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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