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// SPDX-License-Identifier: GPL-2.0-or-later
/**
* @file
* Cairo surface that remembers its origin.
*//*
* Authors:
* Krzysztof Kosiński <tweenk.pl@gmail.com>
*
* Copyright (C) 2011 Authors
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#ifndef SEEN_INKSCAPE_DISPLAY_DRAWING_SURFACE_H
#define SEEN_INKSCAPE_DISPLAY_DRAWING_SURFACE_H
#include <cairo.h>
#include <2geom/affine.h>
#include <2geom/rect.h>
#include <2geom/transforms.h>
extern "C" {
typedef struct _cairo cairo_t;
typedef struct _cairo_surface cairo_surface_t;
typedef struct _cairo_region cairo_region_t;
}
namespace Inkscape {
class DrawingContext;
class DrawingSurface
{
public:
explicit DrawingSurface(Geom::IntRect const &area, int device_scale = 1);
DrawingSurface(Geom::Rect const &logbox, Geom::IntPoint const &pixdims, int device_scale = 1);
DrawingSurface(cairo_surface_t *surface, Geom::Point const &origin);
virtual ~DrawingSurface();
Geom::Rect area() const;
Geom::IntPoint pixels() const;
Geom::Point dimensions() const;
Geom::Point origin() const;
Geom::Scale scale() const;
int device_scale() const;
Geom::Affine drawingTransform() const;
cairo_surface_type_t type() const;
void dropContents();
cairo_surface_t *raw() { return _surface; }
cairo_t *createRawContext();
protected:
Geom::IntRect pixelArea() const;
cairo_surface_t *_surface;
Geom::Point _origin;
Geom::Scale _scale;
Geom::IntPoint _pixels;
int _device_scale; // To support HiDPI screens
bool _has_context;
friend class DrawingContext;
};
class DrawingCache
: public DrawingSurface
{
public:
explicit DrawingCache(Geom::IntRect const &area, int device_scale = 1);
~DrawingCache() override;
void markDirty(Geom::IntRect const &area = Geom::IntRect::infinite());
void markClean(Geom::IntRect const &area = Geom::IntRect::infinite());
void scheduleTransform(Geom::IntRect const &new_area, Geom::Affine const &trans);
void prepare();
void paintFromCache(DrawingContext &dc, Geom::OptIntRect &area, bool is_filter);
protected:
cairo_region_t *_clean_region;
Geom::IntRect _pending_area;
Geom::Affine _pending_transform;
private:
void _dumpCache(Geom::OptIntRect const &area);
static cairo_rectangle_int_t _convertRect(Geom::IntRect const &r);
static Geom::IntRect _convertRect(cairo_rectangle_int_t const &r);
};
} // end namespace Inkscape
#endif // !SEEN_INKSCAPE_DISPLAY_DRAWING_ITEM_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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