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Diffstat (limited to '')
| -rw-r--r-- | src/display/drawing-context.h | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/src/display/drawing-context.h b/src/display/drawing-context.h new file mode 100644 index 0000000..164a0e0 --- /dev/null +++ b/src/display/drawing-context.h @@ -0,0 +1,154 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** + * @file + * Cairo drawing context with Inkscape extensions. + *//* + * 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_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 ¢er, 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 setHairline(); + 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 : |