74 lines
2.2 KiB
C#
74 lines
2.2 KiB
C#
//
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//
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// Mono.Cairo drawing samples using image (png) as drawing surface
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// Author: Hisham Mardam Bey <hisham@hisham.cc>
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//
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//
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// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using Cairo;
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public class CairoTest
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{
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static readonly double M_PI = 3.14159265358979323846;
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static void draw (Cairo.Context gr, int width, int height)
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{
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double xc = 0.5;
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double yc = 0.5;
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double radius = 0.4;
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double angle1 = 45.0 * (M_PI/180.0); /* angles are specified */
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double angle2 = 180.0 * (M_PI/180.0); /* in radians */
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gr.Scale (width, height);
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gr.LineWidth = 0.04;
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gr.ArcNegative (xc, yc, radius, angle1, angle2);
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gr.Stroke ();
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/* draw helping lines */
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gr.Color = new Color(1, 0.2, 0.2, 0.6);
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gr.Arc (xc, yc, 0.05, 0, 2*M_PI);
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gr.Fill ();
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gr.LineWidth = 0.03;
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gr.Arc (xc, yc, radius, angle1, angle1);
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gr.LineTo (new PointD(xc, yc));
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gr.Arc (xc, yc, radius, angle2, angle2);
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gr.LineTo (new PointD(xc, yc));
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gr.Stroke ();
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}
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static void Main ()
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{
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Surface s = new ImageSurface (Format.ARGB32, 500, 500);
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Cairo.Context g = new Cairo.Context (s);
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draw (g, 500, 500);
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s.WriteToPng ("arcneg.png");
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}
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}
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