The Birdfont Source Code


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RadialGradient.vala in /libsvgbird

This file is a part of the Birdfont project.

Contributing

Send patches or pull requests to johan.mattsson.m@gmail.com.
Clone this repository: git clone https://github.com/johanmattssonm/birdfont.git
Circle boundaries heads/master
1 /* 2 Copyright (C) 2016 Johan Mattsson 3 4 This library is free software; you can redistribute it and/or modify 5 it under the terms of the GNU Lesser General Public License as 6 published by the Free Software Foundation; either version 3 of the 7 License, or (at your option) any later version. 8 9 This library is distributed in the hope that it will be useful, but 10 WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 */ 14 15 using Cairo; 16 using Math; 17 18 namespace SvgBird { 19 20 public class RadialGradient : Gradient { 21 public double cx; 22 public double cy; 23 public double fx; 24 public double fy; 25 public double r; 26 27 public RadialGradient () { 28 base (); 29 } 30 31 public override Gradient copy () { 32 RadialGradient g = new RadialGradient (); 33 34 g.cx = cx; 35 g.cy = cy; 36 g.fx = fx; 37 g.fy = fy; 38 g.r = r; 39 40 copy_gradient (this, g); 41 42 return g; 43 } 44 45 public override string to_string () { 46 StringBuilder description = new StringBuilder (); 47 description.append (@"Radial gradient $(id): "); 48 description.append (@"cx=$cx, cy=$cy, fx=$fx, fy=$fy, r=$r"); 49 50 foreach (Stop stop in stops) { 51 description.append (" "); 52 description.append (stop.to_string ()); 53 } 54 55 return description.str; 56 } 57 58 public override void move (double dx, double dy) { 59 double x = dx; 60 double y = dy; 61 62 Matrix parent = parent_matrix; 63 parent.invert (); 64 parent.transform_distance (ref x, ref y); 65 66 cx -= x; 67 cy -= y; 68 } 69 } 70 71 } 72