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  • Committer: Package Import Robot
  • Author(s): Francesco Paolo Lovergine
  • Date: 2011-12-23 14:02:06 UTC
  • mfrom: (26.1.2 sid)
  • Revision ID: package-import@ubuntu.com-20111223140206-n3h9t2hsa8hyslmu
Tags: 6.0.1-2
Added missed stuff for libmapscript-perl.

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mapgeomutil.cpp
 
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/******************************************************************************
 
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 * $Id: mapgeomutil.cpp 11592 2011-04-18 10:15:18Z tbonfort $
 
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 *
 
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 * Project:  MapServer
 
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 * Purpose:  Rendering utility functions
 
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 * Author:   Thomas Bonfort and the MapServer team.
 
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 *
 
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 ******************************************************************************
 
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 * Copyright (c) 1996-2011 Regents of the University of Minnesota.
 
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 *
 
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 * Permission is hereby granted, free of charge, to any person obtaining a
 
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 * copy of this software and associated documentation files (the "Software"),
 
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 * to deal in the Software without restriction, including without limitation
 
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 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 
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 * and/or sell copies of the Software, and to permit persons to whom the
 
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 * Software is furnished to do so, subject to the following conditions:
 
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 *
 
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 * The above copyright notice and this permission notice shall be included in 
 
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 * all copies of this Software or works derived from this Software.
 
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 *
 
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 
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 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 
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 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 
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 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 
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 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 
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 * DEALINGS IN THE SOFTWARE.
 
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 *****************************************************************************/
 
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#include "mapserver.h"
 
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#include "mapagg.h"
 
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#include "renderers/agg/include/agg_arc.h"
 
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#include "renderers/agg/include/agg_basics.h"
 
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shapeObj *msRasterizeArc(double x0, double y0, double radius, double startAngle, double endAngle, int isSlice) {
 
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    static int allocated_size=100;
 
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    shapeObj *shape = (shapeObj*)calloc(1,sizeof(shapeObj));
 
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    MS_CHECK_ALLOC(shape, sizeof(shapeObj), NULL);
 
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    mapserver::arc arc ( x0, y0,radius,radius, startAngle*MS_DEG_TO_RAD, endAngle*MS_DEG_TO_RAD,true );
 
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    arc.approximation_scale ( 1 );
 
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    arc.rewind(1);
 
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    msInitShape(shape);
 
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    lineObj *line = (lineObj*)calloc(1,sizeof(lineObj));
 
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    if (!line) {
 
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        msSetError(MS_MEMERR, "%s: %d: Out of memory allocating %u bytes.\n", "msRasterizeArc()" ,
 
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                   __FILE__, __LINE__, sizeof(lineObj));       
 
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        free(shape);
 
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        return NULL; 
 
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    }
 
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    shape->line = line;
 
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    shape->numlines = 1;
 
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    line->point = (pointObj*)calloc(allocated_size,sizeof(pointObj));
 
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    if (!line->point) {
 
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        msSetError(MS_MEMERR, "%s: %d: Out of memory allocating %u bytes.\n", "msRasterizeArc()" ,
 
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                       __FILE__, __LINE__, allocated_size*sizeof(pointObj));       
 
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        free(line);
 
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        free(shape);
 
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        return NULL; 
 
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    }
 
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    line->numpoints = 0;
 
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    double x,y;
 
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    //first segment from center to first point of arc
 
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    if(isSlice) {
 
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        line->point[0].x = x0;
 
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        line->point[0].y = y0;
 
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        line->numpoints = 1;
 
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    }
 
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    while(arc.vertex(&x,&y) != mapserver::path_cmd_stop) {
 
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        if(line->numpoints == allocated_size) {
 
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            allocated_size *= 2;
 
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            line->point = (pointObj*)realloc(line->point, allocated_size * sizeof(pointObj));
 
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            if (!line->point) {
 
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                msSetError(MS_MEMERR, "%s: %d: Out of memory allocating %u bytes.\n", "msRasterizeArc()" ,
 
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                           __FILE__, __LINE__, allocated_size * sizeof(pointObj));       
 
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                free(line);
 
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                free(shape);
 
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                return NULL; 
 
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            }
 
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        }
 
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        line->point[line->numpoints].x = x;
 
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        line->point[line->numpoints].y = y;
 
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        line->numpoints++;
 
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    }
 
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    //make sure the shape is closed if we're doing a full circle
 
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    if(!isSlice && !(endAngle-startAngle)%360) {
 
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        if(line->point[line->numpoints-1].x != line->point[0].x ||
 
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           line->point[line->numpoints-1].y != line->point[0].y) {
 
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            if(line->numpoints == allocated_size) {
 
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                allocated_size *= 2;
 
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                line->point = (pointObj*)realloc(line->point, allocated_size * sizeof(pointObj));
 
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                if (!line->point) {
 
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                    msSetError(MS_MEMERR, "%s: %d: Out of memory allocating %u bytes.\n", "msRasterizeArc()" ,  
 
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                               __FILE__, __LINE__, allocated_size * sizeof(pointObj));       
 
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                    free(line);
 
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                    free(shape);
 
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                    return NULL; 
 
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                }
 
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            }
 
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            line->point[line->numpoints].x = line->point[0].x;
 
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            line->point[line->numpoints].y = line->point[0].y;
 
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            line->numpoints++;
 
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        }
 
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    }
 
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    if(isSlice) {
 
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        if(line->numpoints == allocated_size) {
 
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            allocated_size *= 2;
 
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            line->point = (pointObj*)realloc(line->point, allocated_size * sizeof(pointObj));
 
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            if (!line->point) {
 
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                msSetError(MS_MEMERR, "%s: %d: Out of memory allocating %u bytes.\n", "msRasterizeArc()" ,
 
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                           __FILE__, __LINE__, allocated_size * sizeof(pointObj));       
 
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                free(line);
 
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                free(shape);
 
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                return NULL; 
 
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            }
 
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        }
 
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        line->point[line->numpoints].x = x0;
 
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        line->point[line->numpoints].y = y0;
 
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        line->numpoints++;
 
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    }
 
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    return shape;
 
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}
 
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