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diff --git a/src/display/drawing-surface.h b/src/display/drawing-surface.h
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+++ b/src/display/drawing-surface.h
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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 :