IBSimu 1.0.4
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00001 00005 /* Copyright (c) 2005-2010 Taneli Kalvas. All rights reserved. 00006 * 00007 * You can redistribute this software and/or modify it under the terms 00008 * of the GNU General Public License as published by the Free Software 00009 * Foundation; either version 2 of the License, or (at your option) 00010 * any later version. 00011 * 00012 * This library is distributed in the hope that it will be useful, but 00013 * WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU General Public License 00018 * along with this library (file "COPYING" included in the package); 00019 * if not, write to the Free Software Foundation, Inc., 51 Franklin 00020 * Street, Fifth Floor, Boston, MA 02110-1301 USA 00021 * 00022 * If you have questions about your rights to use or distribute this 00023 * software, please contact Berkeley Lab's Technology Transfer 00024 * Department at TTD@lbl.gov. Other questions, comments and bug 00025 * reports should be sent directly to the author via email at 00026 * taneli.kalvas@jyu.fi. 00027 * 00028 * NOTICE. This software was developed under partial funding from the 00029 * U.S. Department of Energy. As such, the U.S. Government has been 00030 * granted for itself and others acting on its behalf a paid-up, 00031 * nonexclusive, irrevocable, worldwide license in the Software to 00032 * reproduce, prepare derivative works, and perform publicly and 00033 * display publicly. Beginning five (5) years after the date 00034 * permission to assert copyright is obtained from the U.S. Department 00035 * of Energy, and subject to any subsequent five (5) year renewals, 00036 * the U.S. Government is granted for itself and others acting on its 00037 * behalf a paid-up, nonexclusive, irrevocable, worldwide license in 00038 * the Software to reproduce, prepare derivative works, distribute 00039 * copies to the public, perform publicly and display publicly, and to 00040 * permit others to do so. 00041 */ 00042 00043 #ifndef LINECLIP_HPP 00044 #define LINECLIP_HPP 1 00045 00046 #include <cairo.h> 00047 00048 00057 class LineClip { 00058 cairo_t *p_dc; /* Cairo context */ 00059 double clip[4]; /* xmin, ymin, xmax, ymax */ 00060 00061 double first[2]; /* Last user given moveto point (first point of path) */ 00062 00063 double last[2]; /* last user given point, nan if not available */ 00064 int last_outcode; /* outcode of last user given point */ 00065 int last_op; /* last operation 0=lineto, 1=moveto, 2=no op */ 00066 00067 double drawn[2]; /* last drawn point */ 00068 int drawn_outcode; /* outcode of last drawn point */ 00069 00070 int coord_alloc; /* Allocated size of coordinate database */ 00071 double *coord; /* Buffer for storing line coordinates in curve_to */ 00072 00073 int outcode( double x, double y ); 00074 int exit_outcode( double x, double y ); 00075 void get_point( double *coords, double t, 00076 double x0, double y0, 00077 double x1, double y1, 00078 double x2, double y2, 00079 double x3, double y3 ); 00080 00081 public: 00082 00083 LineClip( cairo_t *cairo ); 00084 ~LineClip(); 00085 00086 void set( double xmin, double ymin, double xmax, double ymax ); 00087 void reset(); 00088 00089 void move_to( double x, double y ); 00090 void line_to( double x, double y ); 00091 void curve_to( double x1, double y1, 00092 double x2, double y2, 00093 double x3, double y3 ); 00094 void close_path(); 00095 void fill(); 00096 }; 00097 00098 00099 #endif 00100 00101 00102 00103 00104 00105 00106 00107 00108 00109 00110 00111 00112