1 #ifndef __NR_FILTER_GAUSSIAN_H__
2 #define __NR_FILTER_GAUSSIAN_H__
4 /*
5 * Gaussian blur renderer
6 *
7 * Authors:
8 * Niko Kiirala <niko@kiirala.com>
9 * bulia byak
10 * Jasper van de Gronde <th.v.d.gronde@hccnet.nl>
11 *
12 * Copyright (C) 2006 authors
13 *
14 * Released under GNU GPL, read the file 'COPYING' for more information
15 */
17 #include "display/nr-filter-primitive.h"
18 #include "display/nr-filter-slot.h"
19 #include "display/nr-filter-units.h"
20 #include "libnr/nr-pixblock.h"
21 #include <2geom/forward.h>
22 #include "libnr/nr-rect-l.h"
24 enum {
25 BLUR_QUALITY_BEST = 2,
26 BLUR_QUALITY_BETTER = 1,
27 BLUR_QUALITY_NORMAL = 0,
28 BLUR_QUALITY_WORSE = -1,
29 BLUR_QUALITY_WORST = -2
30 };
32 namespace Inkscape {
33 namespace Filters {
35 class FilterGaussian : public FilterPrimitive {
36 public:
37 FilterGaussian();
38 static FilterPrimitive *create();
39 virtual ~FilterGaussian();
41 virtual int render(FilterSlot &slot, FilterUnits const &units);
42 virtual void area_enlarge(NRRectL &area, Geom::Matrix const &m);
43 virtual FilterTraits get_input_traits();
45 /**
46 * Set the standard deviation value for gaussian blur. Deviation along
47 * both axis is set to the provided value.
48 * Negative value, NaN and infinity are considered an error and no
49 * changes to filter state are made. If not set, default value of zero
50 * is used, which means the filter results in transparent black image.
51 */
52 void set_deviation(double deviation);
53 /**
54 * Set the standard deviation value for gaussian blur. First parameter
55 * sets the deviation alogn x-axis, second along y-axis.
56 * Negative value, NaN and infinity are considered an error and no
57 * changes to filter state are made. If not set, default value of zero
58 * is used, which means the filter results in transparent black image.
59 */
60 void set_deviation(double x, double y);
62 private:
63 double _deviation_x;
64 double _deviation_y;
65 };
68 } /* namespace Filters */
69 } /* namespace Inkscape */
74 #endif /* __NR_FILTER_GAUSSIAN_H__ */
75 /*
76 Local Variables:
77 mode:c++
78 c-file-style:"stroustrup"
79 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
80 indent-tabs-mode:nil
81 fill-column:99
82 End:
83 */
84 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :