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+// SPDX-License-Identifier: GPL-2.0-or-later
+/**
+ * @file
+ * Cairo drawing context with Inkscape extensions.
+ *//*
+ * Authors:
+ * Krzysztof KosiƄski <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_CONTEXT_H
+#define SEEN_INKSCAPE_DISPLAY_DRAWING_CONTEXT_H
+
+#include <2geom/rect.h>
+#include <2geom/transforms.h>
+#include <boost/utility.hpp>
+#include <cairo.h>
+typedef unsigned int guint32;
+
+namespace Inkscape {
+
+class DrawingSurface;
+
+class DrawingContext
+ : boost::noncopyable
+{
+public:
+ class Save {
+ public:
+ Save();
+ Save(DrawingContext &dc);
+ ~Save();
+ void save(DrawingContext &dc);
+ private:
+ DrawingContext *_dc;
+ };
+
+ DrawingContext(cairo_t *ct, Geom::Point const &origin);
+ DrawingContext(cairo_surface_t *surface, Geom::Point const &origin);
+ DrawingContext(DrawingSurface &s);
+ ~DrawingContext();
+
+ void save() { cairo_save(_ct); }
+ void restore() { cairo_restore(_ct); }
+ void pushGroup() { cairo_push_group(_ct); }
+ void pushAlphaGroup() { cairo_push_group_with_content(_ct, CAIRO_CONTENT_ALPHA); }
+ void popGroupToSource() { cairo_pop_group_to_source(_ct); }
+
+ void transform(Geom::Affine const &trans);
+ void translate(Geom::Point const &t) { cairo_translate(_ct, t[Geom::X], t[Geom::Y]); } // todo: take Translate
+ void translate(double dx, double dy) { cairo_translate(_ct, dx, dy); }
+ void scale(Geom::Scale const &s) { cairo_scale(_ct, s[Geom::X], s[Geom::Y]); }
+ void scale(double sx, double sy) { cairo_scale(_ct, sx, sy); }
+ void device_to_user_distance(double &dx, double &dy) { cairo_device_to_user_distance(_ct, &dx, &dy); }
+ void user_to_device_distance(double &dx, double &dy) { cairo_user_to_device_distance(_ct, &dx, &dy); }
+
+ void moveTo(Geom::Point const &p) { cairo_move_to(_ct, p[Geom::X], p[Geom::Y]); }
+ void lineTo(Geom::Point const &p) { cairo_line_to(_ct, p[Geom::X], p[Geom::Y]); }
+ void curveTo(Geom::Point const &p1, Geom::Point const &p2, Geom::Point const &p3) {
+ cairo_curve_to(_ct, p1[Geom::X], p1[Geom::Y], p2[Geom::X], p2[Geom::Y], p3[Geom::X], p3[Geom::Y]);
+ }
+ void arc(Geom::Point const &center, double radius, Geom::AngleInterval const &angle);
+ void closePath() { cairo_close_path(_ct); }
+ void rectangle(Geom::Rect const &r) {
+ cairo_rectangle(_ct, r.left(), r.top(), r.width(), r.height());
+ }
+ void rectangle(Geom::IntRect const &r) {
+ cairo_rectangle(_ct, r.left(), r.top(), r.width(), r.height());
+ }
+ // Used in drawing-text.cpp to overwrite glyphs, which have the opposite path rotation as a regular rect
+ void revrectangle(Geom::Rect const &r) {
+ cairo_move_to ( _ct, r.left(), r.top() );
+ cairo_rel_line_to (_ct, 0, r.height() );
+ cairo_rel_line_to (_ct, r.width(), 0 );
+ cairo_rel_line_to (_ct, 0, -r.height() );
+ cairo_close_path ( _ct);
+ }
+ void revrectangle(Geom::IntRect const &r) {
+ cairo_move_to ( _ct, r.left(), r.top() );
+ cairo_rel_line_to (_ct, 0, r.height() );
+ cairo_rel_line_to (_ct, r.width(), 0 );
+ cairo_rel_line_to (_ct, 0, -r.height() );
+ cairo_close_path ( _ct);
+ }
+ void newPath() { cairo_new_path(_ct); }
+ void newSubpath() { cairo_new_sub_path(_ct); }
+ void path(Geom::PathVector const &pv);
+
+ void paint(double alpha = 1.0);
+ void fill() { cairo_fill(_ct); }
+ void fillPreserve() { cairo_fill_preserve(_ct); }
+ void stroke() { cairo_stroke(_ct); }
+ void strokePreserve() { cairo_stroke_preserve(_ct); }
+ void clip() { cairo_clip(_ct); }
+
+ void setLineWidth(double w) { cairo_set_line_width(_ct, w); }
+ void setLineCap(cairo_line_cap_t cap) { cairo_set_line_cap(_ct, cap); }
+ void setLineJoin(cairo_line_join_t join) { cairo_set_line_join(_ct, join); }
+ void setMiterLimit(double miter) { cairo_set_miter_limit(_ct, miter); }
+ void setFillRule(cairo_fill_rule_t rule) { cairo_set_fill_rule(_ct, rule); }
+ void setOperator(cairo_operator_t op) { cairo_set_operator(_ct, op); }
+ cairo_operator_t getOperator() { return cairo_get_operator(_ct); }
+ void setTolerance(double tol) { cairo_set_tolerance(_ct, tol); }
+ void setSource(cairo_pattern_t *source) { cairo_set_source(_ct, source); }
+ void setSource(cairo_surface_t *surface, double x, double y) {
+ cairo_set_source_surface(_ct, surface, x, y);
+ }
+ void setSource(double r, double g, double b, double a = 1.0) {
+ cairo_set_source_rgba(_ct, r, g, b, a);
+ }
+ void setSource(guint32 rgba);
+ void setSource(DrawingSurface *s);
+ void setSourceCheckerboard();
+
+ void patternSetFilter(cairo_filter_t filter) {
+ cairo_pattern_set_filter(cairo_get_source(_ct), filter);
+ }
+ void patternSetExtend(cairo_extend_t extend) { cairo_pattern_set_extend(cairo_get_source(_ct), extend); }
+
+ Geom::Rect targetLogicalBounds() const;
+
+ cairo_t *raw() { return _ct; }
+ cairo_surface_t *rawTarget() { return cairo_get_group_target(_ct); }
+
+ DrawingSurface *surface() { return _surface; } // Needed to find scale in drawing-item.cpp
+
+private:
+ DrawingContext(cairo_t *ct, DrawingSurface *surface, bool destroy);
+
+ cairo_t *_ct;
+ DrawingSurface *_surface;
+ bool _delete_surface;
+ bool _restore_context;
+
+ friend class DrawingSurface;
+};
+
+} // 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 :