1 files changed, 80 insertions, 0 deletions
diff --git a/src/ui/widget/canvas/cairographics.h b/src/ui/widget/canvas/cairographics.h
new file mode 100644
index 0000000..c29eff1
--- /dev/null
+++ b/src/ui/widget/canvas/cairographics.h
@@ -0,0 +1,80 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Cairo display backend.
+ * Copyright (C) 2022 PBS <pbs3141@gmail.com>
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef INKSCAPE_UI_WIDGET_CANVAS_CAIROGRAPHICS_H
+#define INKSCAPE_UI_WIDGET_CANVAS_CAIROGRAPHICS_H
+
+#include "graphics.h"
+
+namespace Inkscape {
+namespace UI {
+namespace Widget {
+
+struct CairoFragment
+{
+    Cairo::RefPtr<Cairo::ImageSurface> surface;
+    Cairo::RefPtr<Cairo::ImageSurface> outline_surface;
+};
+
+class CairoGraphics : public Graphics
+{
+public:
+    CairoGraphics(Prefs const &prefs, Stores const &stores, PageInfo const &pi);
+
+    void set_scale_factor(int scale) override { scale_factor = scale; }
+    void set_outlines_enabled(bool) override;
+    void set_background_in_stores(bool enabled) override { background_in_stores = enabled; }
+    void set_colours(uint32_t p, uint32_t d, uint32_t b) override { page = p; desk = d; border = b; }
+    
+    void recreate_store(Geom::IntPoint const &dimensions) override;
+    void shift_store(Fragment const &dest) override;
+    void swap_stores() override;
+    void fast_snapshot_combine() override;
+    void snapshot_combine(Fragment const &dest) override;
+    void invalidate_snapshot() override {}
+
+    bool is_opengl() const override { return false; }
+    void invalidated_glstate() override {}
+
+    Cairo::RefPtr<Cairo::ImageSurface> request_tile_surface(Geom::IntRect const &rect, bool nogl) override;
+    void draw_tile(Fragment const &fragment, Cairo::RefPtr<Cairo::ImageSurface> surface, Cairo::RefPtr<Cairo::ImageSurface> outline_surface) override;
+    void junk_tile_surface(Cairo::RefPtr<Cairo::ImageSurface> surface) override {}
+
+    void paint_widget(Fragment const &view, PaintArgs const &args, Cairo::RefPtr<Cairo::Context> const &cr) override;
+
+private:
+    // Drawn content.
+    CairoFragment store, snapshot;
+
+    // Dependency objects in canvas.
+    Prefs const &prefs;
+    Stores const &stores;
+    PageInfo const &pi;
+
+    // Backend-agnostic state.
+    int scale_factor = 1;
+    bool outlines_enabled = false;
+    bool background_in_stores = false;
+    uint32_t page, desk, border;
+};
+
+} // namespace Widget
+} // namespace UI
+} // namespace Inkscape
+
+#endif // INKSCAPE_UI_WIDGET_CANVAS_CAIROGRAPHICS_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 :