3 // Mono.Cairo drawing samples using image (png) as drawing surface
4 // Author: Hisham Mardam Bey <hisham@hisham.cc>
8 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
10 // Permission is hereby granted, free of charge, to any person obtaining
11 // a copy of this software and associated documentation files (the
12 // "Software"), to deal in the Software without restriction, including
13 // without limitation the rights to use, copy, modify, merge, publish,
14 // distribute, sublicense, and/or sell copies of the Software, and to
15 // permit persons to whom the Software is furnished to do so, subject to
16 // the following conditions:
18 // The above copyright notice and this permission notice shall be
19 // included in all copies or substantial portions of the Software.
21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
33 public class CairoTest
35 static readonly double M_PI = 3.14159265358979323846;
37 static void draw (Cairo.Context gr, int width, int height)
42 double angle1 = 45.0 * (M_PI/180.0);
43 double angle2 = 180.0 * (M_PI/180.0);
45 gr.Scale (width, height);
48 gr.Arc (xc, yc, radius, angle1, angle2);
51 /* draw helping lines */
52 gr.Color = new Color(1, 0.2, 0.2, 0.6);
53 gr.Arc (xc, yc, 0.05, 0, 2*M_PI);
56 gr.Arc (xc, yc, radius, angle1, angle1);
57 gr.LineTo (new PointD(xc, yc));
58 gr.Arc (xc, yc, radius, angle2, angle2);
59 gr.LineTo (new PointD(xc, yc));
67 Surface s = new ImageSurface (Format.ARGB32, 500, 500);
68 Cairo.Context g = new Cairo.Context (s);
72 s.WriteToPng ("arc.png");