[Bug classpath/29386] New: Arc2D.getPathIterator returns reverse path when the extent is negative.

[ujihara at aurora dot dti dot ne dot jp]

Arc2D.getPathIterator(null) returns reverse path when the extent of Arc2D
object is negative. For example, the following program outputs
  100.0 50.0
  100.0 77.614235 77.614235 100.0 50.0 100.0
in Java, but the same program outputs 
  50.0 100.0
  77.61423 100.0 100.0 77.61423 100.0 50.0
in GNU Classpath 0.91. 

import java.awt.*;
import java.awt.geom.*;

public class Program
{
    public static void main(String[] args)
    {
        Arc2D a = new Arc2D.Float(0, 0, 100, 100, 0, -90, Arc2D.OPEN);
        float[] ff = new float[6];
        for (PathIterator pi = a.getPathIterator(null); !pi.isDone(); )
        {
            int type = pi.currentSegment(ff);
            int n = 0;
            switch (type)
            {
                case PathIterator.SEG_MOVETO:
                case PathIterator.SEG_LINETO:
                    n = 1;
                    break;
                case PathIterator.SEG_QUADTO:
                    n = 2;
                    break;
                case PathIterator.SEG_CUBICTO:
                    n = 3;
                    break;
                default:
                    throw new InternalError();                
            }
            for (int i = 0; i < n; i++)
            {
                System.out.print(ff[i*2]);
                System.out.print(" ");
                System.out.print(ff[i*2+1]);
                System.out.print(" ");
            }
            System.out.println();
            pi.next();
        }
    }
}


-- 
           Summary: Arc2D.getPathIterator returns reverse path when the
                    extent is negative.
           Product: classpath
           Version: 0.91
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: classpath
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ujihara at aurora dot dti dot ne dot jp


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29386