1 /* 2 * Copyright (C) 2013-2014 Paul Davis <paul@linuxaudiosystems.com> 3 * Copyright (C) 2014 Robin Gareus <robin@gareus.org> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License along 16 * with this program; if not, write to the Free Software Foundation, Inc., 17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 18 */ 19 20 #ifndef __CANVAS_CURVE_H__ 21 #define __CANVAS_CURVE_H__ 22 23 #include "canvas/visibility.h" 24 25 #include "canvas/interpolated_curve.h" 26 #include "canvas/poly_item.h" 27 #include "canvas/fill.h" 28 29 namespace ArdourCanvas { 30 31 class XFadeCurve; 32 33 class LIBCANVAS_API Curve : public PolyItem, public InterpolatedCurve 34 { 35 public: 36 Curve (Canvas*); 37 Curve (Item*); 38 39 enum CurveFill { 40 None, 41 Inside, 42 Outside, 43 }; 44 45 void compute_bounding_box () const; 46 void render (Rect const & area, Cairo::RefPtr<Cairo::Context>) const; 47 void set (Points const &); 48 49 void set_points_per_segment (uint32_t n); 50 51 bool covers (Duple const &) const; set_fill_mode(CurveFill cf)52 void set_fill_mode (CurveFill cf) { curve_fill = cf; } 53 54 private: 55 Points samples; 56 Points::size_type n_samples; 57 uint32_t points_per_segment; 58 CurveFill curve_fill; 59 60 void interpolate (); 61 }; 62 63 } 64 65 #endif 66