/src/MapServer/src/mapgeomutil.cpp

Source
/******************************************************************************
 * $Id$
 *
 * Project:  MapServer
 * Purpose:  Rendering utility functions
 * Author:   Thomas Bonfort and the MapServer team.
 *
 ******************************************************************************
 * Copyright (c) 1996-2011 Regents of the University of Minnesota.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies of this Software or works derived from this Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *****************************************************************************/

#include "mapserver.h"
#include "renderers/agg/include/agg_arc.h"
#include "renderers/agg/include/agg_basics.h"

shapeObj *msRasterizeArc(double x0, double y0, double radius, double startAngle,
                         double endAngle, int isSlice) {
  static int allocated_size = 100;
  shapeObj *shape = (shapeObj *)calloc(1, sizeof(shapeObj));
  MS_CHECK_ALLOC(shape, sizeof(shapeObj), NULL);
  mapserver::arc arc(x0, y0, radius, radius, startAngle * MS_DEG_TO_RAD,
                     endAngle * MS_DEG_TO_RAD, true);
  arc.approximation_scale(1);
  arc.rewind(1);
  msInitShape(shape);

  lineObj *line = (lineObj *)calloc(1, sizeof(lineObj));
  if (!line) {
    msSetError(MS_MEMERR, "%s: %d: Out of memory allocating %u bytes.\n",
               "msRasterizeArc()", __FILE__, __LINE__,
               (unsigned int)sizeof(lineObj));
    free(shape);
    return NULL;
  }
  shape->line = line;
  shape->numlines = 1;
  line->point = (pointObj *)calloc(allocated_size, sizeof(pointObj));
  if (!line->point) {
    msSetError(MS_MEMERR, "%s: %d: Out of memory allocating %u bytes.\n",
               "msRasterizeArc()", __FILE__, __LINE__,
               (unsigned int)(allocated_size * sizeof(pointObj)));
    free(line);
    free(shape);
    return NULL;
  }

  line->numpoints = 0;

  double x, y;

  // first segment from center to first point of arc
  if (isSlice) {
    line->point[0].x = x0;
    line->point[0].y = y0;
    line->numpoints = 1;
  }
  while (arc.vertex(&x, &y) != mapserver::path_cmd_stop) {
    if (line->numpoints == allocated_size) {
      allocated_size *= 2;
      line->point =
          (pointObj *)realloc(line->point, allocated_size * sizeof(pointObj));
      if (!line->point) {
        msSetError(MS_MEMERR, "%s: %d: Out of memory allocating %u bytes.\n",
                   "msRasterizeArc()", __FILE__, __LINE__,
                   (unsigned int)(allocated_size * sizeof(pointObj)));
        free(line);
        free(shape);
        return NULL;
      }
    }
    line->point[line->numpoints].x = x;
    line->point[line->numpoints].y = y;
    line->numpoints++;
  }

  // make sure the shape is closed
  if (line->point[line->numpoints - 1].x != line->point[0].x ||
      line->point[line->numpoints - 1].y != line->point[0].y) {
    if (line->numpoints == allocated_size) {
      allocated_size *= 2;
      line->point = (pointObj *)msSmallRealloc(
          line->point, allocated_size * sizeof(pointObj));
    }
    line->point[line->numpoints].x = line->point[0].x;
    line->point[line->numpoints].y = line->point[0].y;
    line->numpoints++;
  }

  return shape;
}

Coverage Report

Created: 2026-09-14 06:50

Line	Count	Source
1		/******************************************************************************
2		* $Id$
3		*
4		* Project: MapServer
5		* Purpose: Rendering utility functions
6		* Author: Thomas Bonfort and the MapServer team.
7		*
8		******************************************************************************
9		* Copyright (c) 1996-2011 Regents of the University of Minnesota.
10		*
11		* Permission is hereby granted, free of charge, to any person obtaining a
12		* copy of this software and associated documentation files (the "Software"),
13		* to deal in the Software without restriction, including without limitation
14		* the rights to use, copy, modify, merge, publish, distribute, sublicense,
15		* and/or sell copies of the Software, and to permit persons to whom the
16		* Software is furnished to do so, subject to the following conditions:
17		*
18		* The above copyright notice and this permission notice shall be included in
19		* all copies of this Software or works derived from this Software.
20		*
21		* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
22		* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23		* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
24		* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
25		* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
26		* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
27		* DEALINGS IN THE SOFTWARE.
28		*****************************************************************************/
29
30		#include "mapserver.h"
31		#include "renderers/agg/include/agg_arc.h"
32		#include "renderers/agg/include/agg_basics.h"
33
34		shapeObj *msRasterizeArc(double x0, double y0, double radius, double startAngle,
35	0	double endAngle, int isSlice) {
36	0	static int allocated_size = 100;
37	0	shapeObj shape = (shapeObj )calloc(1, sizeof(shapeObj));
38	0	MS_CHECK_ALLOC(shape, sizeof(shapeObj), NULL);
39	0	mapserver::arc arc(x0, y0, radius, radius, startAngle * MS_DEG_TO_RAD,
40	0	endAngle * MS_DEG_TO_RAD, true);
41	0	arc.approximation_scale(1);
42	0	arc.rewind(1);
43	0	msInitShape(shape);
44
45	0	lineObj line = (lineObj )calloc(1, sizeof(lineObj));
46	0	if (!line) {
47	0	msSetError(MS_MEMERR, "%s: %d: Out of memory allocating %u bytes.\n",
48	0	"msRasterizeArc()", __FILE__, __LINE__,
49	0	(unsigned int)sizeof(lineObj));
50	0	free(shape);
51	0	return NULL;
52	0	}
53	0	shape->line = line;
54	0	shape->numlines = 1;
55	0	line->point = (pointObj *)calloc(allocated_size, sizeof(pointObj));
56	0	if (!line->point) {
57	0	msSetError(MS_MEMERR, "%s: %d: Out of memory allocating %u bytes.\n",
58	0	"msRasterizeArc()", __FILE__, __LINE__,
59	0	(unsigned int)(allocated_size * sizeof(pointObj)));
60	0	free(line);
61	0	free(shape);
62	0	return NULL;
63	0	}
64
65	0	line->numpoints = 0;
66
67	0	double x, y;
68
69		// first segment from center to first point of arc
70	0	if (isSlice) {
71	0	line->point[0].x = x0;
72	0	line->point[0].y = y0;
73	0	line->numpoints = 1;
74	0	}
75	0	while (arc.vertex(&x, &y) != mapserver::path_cmd_stop) {
76	0	if (line->numpoints == allocated_size) {
77	0	allocated_size *= 2;
78	0	line->point =
79	0	(pointObj )realloc(line->point, allocated_size sizeof(pointObj));
80	0	if (!line->point) {
81	0	msSetError(MS_MEMERR, "%s: %d: Out of memory allocating %u bytes.\n",
82	0	"msRasterizeArc()", __FILE__, __LINE__,
83	0	(unsigned int)(allocated_size * sizeof(pointObj)));
84	0	free(line);
85	0	free(shape);
86	0	return NULL;
87	0	}
88	0	}
89	0	line->point[line->numpoints].x = x;
90	0	line->point[line->numpoints].y = y;
91	0	line->numpoints++;
92	0	}
93
94		// make sure the shape is closed
95	0	if (line->point[line->numpoints - 1].x != line->point[0].x \|\|
96	0	line->point[line->numpoints - 1].y != line->point[0].y) {
97	0	if (line->numpoints == allocated_size) {
98	0	allocated_size *= 2;
99	0	line->point = (pointObj *)msSmallRealloc(
100	0	line->point, allocated_size * sizeof(pointObj));
101	0	}
102	0	line->point[line->numpoints].x = line->point[0].x;
103	0	line->point[line->numpoints].y = line->point[0].y;
104	0	line->numpoints++;
105	0	}
106
107	0	return shape;
108	0	}