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// SPDX-License-Identifier: GPL-2.0-or-later
#ifndef SEEN_NR_FILTER_SLOT_H
#define SEEN_NR_FILTER_SLOT_H
/*
* A container class for filter slots. Allows for simple getting and
* setting images in filter slots without having to bother with
* table indexes and such.
*
* Author:
* Niko Kiirala <niko@kiirala.com>
*
* Copyright (C) 2006,2007 Niko Kiirala
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include <map>
#include "nr-filter-types.h"
#include "nr-filter-units.h"
extern "C" {
typedef struct _cairo cairo_t;
typedef struct _cairo_surface cairo_surface_t;
}
namespace Inkscape {
class DrawingContext;
class DrawingItem;
class RenderContext;
namespace Filters {
class FilterSlot final
{
public:
/** Creates a new FilterSlot object. */
FilterSlot(DrawingContext *bgdc, DrawingContext &graphic, FilterUnits const &units, RenderContext &rc, int blurquality);
/** Destroys the FilterSlot object and all its contents */
~FilterSlot();
/** Returns the pixblock in specified slot.
* Parameter 'slot' may be either an positive integer or one of
* pre-defined filter slot types: NR_FILTER_SLOT_NOT_SET,
* NR_FILTER_SOURCEGRAPHIC, NR_FILTER_SOURCEALPHA,
* NR_FILTER_BACKGROUNDIMAGE, NR_FILTER_BACKGROUNDALPHA,
* NR_FILTER_FILLPAINT, NR_FILTER_SOURCEPAINT.
*/
cairo_surface_t *getcairo(int slot);
/** Sets or re-sets the pixblock associated with given slot.
* If there was a pixblock already assigned with this slot,
* that pixblock is destroyed.
*/
void set(int slot, cairo_surface_t *s);
cairo_surface_t *get_result(int slot_nr);
void set_primitive_area(int slot, Geom::Rect &area);
Geom::Rect get_primitive_area(int slot) const;
/** Returns the number of slots in use. */
int get_slot_count() const { return _slots.size(); }
/** Gets the gaussian filtering quality. Affects used interpolation methods */
int get_blurquality() const { return _blurquality; }
/** Gets the device scale; for high DPI monitors. */
int get_device_scale() const { return device_scale; }
FilterUnits const &get_units() const { return _units; }
Geom::Rect get_slot_area() const;
RenderContext &get_rendercontext() const { return rc; }
private:
using SlotMap = std::map<int, cairo_surface_t *>;
SlotMap _slots;
// We need to keep track of the primitive area as this is needed in feTile
using PrimitiveAreaMap = std::map<int, Geom::Rect>;
PrimitiveAreaMap _primitiveAreas;
int _slot_w, _slot_h;
double _slot_x, _slot_y;
cairo_surface_t *_source_graphic;
cairo_t *_background_ct;
Geom::IntRect _source_graphic_area;
Geom::IntRect _background_area; ///< needed to extract background
FilterUnits const &_units;
int _last_out;
int _blurquality;
int device_scale;
RenderContext &rc;
cairo_surface_t *_get_transformed_source_graphic() const;
cairo_surface_t *_get_transformed_background() const;
cairo_surface_t *_get_fill_paint() const;
cairo_surface_t *_get_stroke_paint() const;
void _set_internal(int slot, cairo_surface_t *s);
};
} // namespace Filters
} // namespace Inkscape
#endif // SEEN_NR_FILTER_SLOT_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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