nr-filter-gaussian.h revision 24c6ddb693cb37e6e68798b6fff862d5968c5891
#ifndef __NR_FILTER_GAUSSIAN_H__
#define __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, read the file 'COPYING' for more information
*/
#include "display/nr-filter-primitive.h"
#include "display/nr-filter-slot.h"
#include "libnr/nr-pixblock.h"
#include "libnr/nr-matrix.h"
enum {
BLUR_QUALITY_BEST = 2,
BLUR_QUALITY_BETTER = 1,
BLUR_QUALITY_NORMAL = 0,
BLUR_QUALITY_WORSE = -1,
BLUR_QUALITY_WORST = -2
};
namespace NR {
class FilterGaussian : public FilterPrimitive {
public:
FilterGaussian();
static FilterPrimitive *create();
virtual ~FilterGaussian();
virtual int render(FilterSlot &slot, Matrix const &trans);
virtual int get_enlarge(Matrix const &m);
/**
* 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);
private:
double _deviation_x;
double _deviation_y;
};
} /* namespace NR */
#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:
*/
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