mcs/class/Mono.Cairo/Samples/png/clip_img.cs

   1 //
   2 //
   3 //      Mono.Cairo drawing samples using image (png) as drawing surface
   4 //      Author: Hisham Mardam Bey <hisham@hisham.cc>
   5 //
   6
   7 //
   8 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
   9 //
  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:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  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.
  28 //
  29
  30 using System;
  31 using Cairo;
  32
  33 public class CairoTest
  34 {
  35         static readonly double  M_PI = 3.14159265358979323846;
  36
  37         static void draw (Cairo.Context gr, int width, int height)
  38         {
  39                 int w, h;
  40                 ImageSurface image;
  41
  42                 gr.Scale (width, height);
  43                 gr.LineWidth = 0.04;
  44
  45                 gr.Arc (0.5, 0.5, 0.3, 0, 2*M_PI);
  46                 gr.Clip ();
  47                 gr.NewPath ();
  48
  49                 image = new ImageSurface("data/e.png");
  50                 w = image.Width;
  51                 h = image.Height;
  52
  53                 gr.Scale (1.0/w, 1.0/h);
  54
  55                 image.Show (gr, 0, 0);
  56
  57                 image.Destroy();
  58
  59                 gr.Arc (0.5, 0.5, 0.3, 0, 2 * M_PI);
  60                 gr.Clip ();
  61
  62                 gr.NewPath ();
  63                 gr.Rectangle (new PointD (0, 0), 1, 1);
  64                 gr.Fill ();
  65                 gr.Color = new Color (0, 1, 0, 1);
  66                 gr.MoveTo ( new PointD (0, 0) );
  67                 gr.LineTo ( new PointD (1, 1) );
  68                 gr.MoveTo ( new PointD (1, 0) );
  69                 gr.LineTo ( new PointD (0, 1) );
  70                 gr.Stroke ();
  71         }
  72
  73
  74         static void Main ()
  75         {
  76                 Surface s = new ImageSurface (Format.ARGB32, 500, 500);
  77                 Cairo.Context g = new Cairo.Context (s);
  78
  79                 draw (g, 500, 500);
  80
  81                 s.WriteToPng ("clip_img.png");
  82         }
  83 }