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)
39 //gr.Scale (width, height);
40 //gr.LineWidth = 0.04;
45 double X_INNER_RADIUS = 0.3;
46 double Y_INNER_RADIUS = 0.2;
48 double X_OUTER_RADIUS = 0.45;
49 double Y_OUTER_RADIUS = 0.35;
56 string text = "KAPOW!";
58 cairo_text_extents_t extents;
61 cairo_set_line_width (cr, 0.01);
63 for (i = 0; i < SPIKES * 2; i++) {
65 x = 0.5 + cos (M_PI * i / SPIKES) * X_INNER_RADIUS +
66 (double) rand() * X_FUZZ / RAND_MAX;
67 y = 0.5 + sin (M_PI * i / SPIKES) * Y_INNER_RADIUS +
68 (double) rand() * Y_FUZZ / RAND_MAX;
71 cairo_move_to (cr, x, y);
73 cairo_line_to (cr, x, y);
77 x = 0.5 + cos (M_PI * i / SPIKES) * X_OUTER_RADIUS +
78 (double) rand() * X_FUZZ / RAND_MAX;
79 y = 0.5 + sin (M_PI * i / SPIKES) * Y_OUTER_RADIUS +
80 (double) rand() * Y_FUZZ / RAND_MAX;
82 cairo_line_to (cr, x, y);
85 cairo_close_path (cr);
89 cairo_select_font_face (cr, "Sans",
90 CAIRO_FONT_SLANT_NORMAL,
91 CAIRO_FONT_WEIGHT_BOLD);
93 cairo_move_to (cr, x, y);
94 cairo_text_path (cr, text);
98 cairo_set_font_size (cr, 0.2);
99 cairo_text_extents (cr, text, &extents);
100 x = 0.5-(extents.width/2 + extents.x_bearing);
101 y = 0.5-(extents.height/2 + extents.y_bearing);
104 cairo_set_source_rgb (cr, 1 , 1, 0.5);
107 cairo_move_to (cr, x, y);
108 cairo_text_path (cr, text);
109 cairo_set_source_rgb (cr, 0 , 0, 0);
120 gr.Arc (xc, yc, radius, angle1, angle2);
123 /* draw helping lines */
124 gr.Color = new Color(1, 0.2, 0.2, 0.6);
125 gr.Arc (xc, yc, 0.05, 0, 2*M_PI);
128 gr.Arc (xc, yc, radius, angle1, angle1);
129 gr.LineTo (new PointD(xc, yc));
130 gr.Arc (xc, yc, radius, angle2, angle2);
131 gr.LineTo (new PointD(xc, yc));
138 Surface s = new ImageSurface (Format.ARGB32, 500, 500);
139 Cairo.Context g = new Cairo.Context (s);
143 s.WriteToPng ("pattern_fill.png");