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// SPDX-License-Identifier: GPL-2.0-or-later
#ifndef SEEN_NR_FILTER_TURBULENCE_H
#define SEEN_NR_FILTER_TURBULENCE_H
/*
* feTurbulence filter primitive renderer
*
* Authors:
* World Wide Web Consortium <http://www.w3.org/>
* Felipe Corrêa da Silva Sanches <juca@members.fsf.org>
* Niko Kiirala <niko@kiirala.com>
*
* This file has a considerable amount of code adapted from
* the W3C SVG filter specs, available at:
* http://www.w3.org/TR/SVG11/filters.html#feTurbulence
*
* W3C original code is licensed under the terms of
* the (GPL compatible) W3C® SOFTWARE NOTICE AND LICENSE:
* http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
*
* Copyright (C) 2007 authors
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include <2geom/point.h>
#include "display/nr-filter-primitive.h"
#include "display/nr-filter-slot.h"
#include "display/nr-filter-units.h"
namespace Inkscape {
namespace Filters {
enum FilterTurbulenceType {
TURBULENCE_FRACTALNOISE,
TURBULENCE_TURBULENCE,
TURBULENCE_ENDTYPE
};
class TurbulenceGenerator;
class FilterTurbulence : public FilterPrimitive {
public:
FilterTurbulence();
static FilterPrimitive *create();
~FilterTurbulence() override;
void render_cairo(FilterSlot &slot) override;
double complexity(Geom::Affine const &ctm) override;
bool uses_background() override { return false; }
void set_baseFrequency(int axis, double freq);
void set_numOctaves(int num);
void set_seed(double s);
void set_stitchTiles(bool st);
void set_type(FilterTurbulenceType t);
void set_updated(bool u);
Glib::ustring name() override { return Glib::ustring("Turbulence"); }
private:
TurbulenceGenerator *gen;
void turbulenceInit(long seed);
double XbaseFrequency, YbaseFrequency;
int numOctaves;
double seed;
bool stitchTiles;
FilterTurbulenceType type;
bool updated;
unsigned char *pix_data;
double fTileWidth;
double fTileHeight;
double fTileX;
double fTileY;
};
} /* namespace Filters */
} /* namespace Inkscape */
#endif /* __NR_FILTER_TURBULENCE_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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