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Diffstat (limited to 'libs/canvas/canvas/curve.h')
-rw-r--r-- | libs/canvas/canvas/curve.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/libs/canvas/canvas/curve.h b/libs/canvas/canvas/curve.h new file mode 100644 index 0000000000..f2ed6a1d0e --- /dev/null +++ b/libs/canvas/canvas/curve.h @@ -0,0 +1,53 @@ +/* + Copyright (C) 2013 Paul Davis + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#ifndef __CANVAS_CURVE_H__ +#define __CANVAS_CURVE_H__ + +#include "canvas/poly_item.h" + +namespace ArdourCanvas { + +class Curve : public PolyItem +{ +public: + Curve (Group *); + + void compute_bounding_box () const; + + void render (Rect const & area, Cairo::RefPtr<Cairo::Context>) const; + + void set (Points const &); + + protected: + void render_path (Rect const &, Cairo::RefPtr<Cairo::Context>) const; + void render_curve (Rect const &, Cairo::RefPtr<Cairo::Context>) const; + + private: + Points first_control_points; + Points second_control_points; + + + static void compute_control_points (Points const &, + Points&, Points&); + static double* solve (std::vector<double> const&); +}; + +} + +#endif |