wmf coder chord, pie and arc fix

Hi Bob,

I worked a little bit on the problem with wmf and pie/arc/chord.
I attached you a patch, which fixes those problems, but I'm not
sure if this code fixes all cases:
1. DrawPathEllipticArcAbsolute(): I'm not sure what exactly those
   three parameters are about x_axis_rotation, large_arc_flag,
   sweep_flag. If I change the sweep_flag, the pie is not drawn
   correctly anymore...
2. In chord, a substract the two positions of the arc oordinates
   from the bottom/left coordinates. This could be wrong or could
   be fine-tuned.
Anyway, I would say, this is a good starting point for other
people who run into the same issue.

Regards,

	Peter

Index: coders/wmf.c
===================================================================
RCS file: /ImageMagick/ImageMagick/coders/wmf.c,v
retrieving revision 1.61
diff -u -r1.61 wmf.c
--- coders/wmf.c	24 Jan 2004 01:13:03 -0000	1.61
+++ coders/wmf.c	12 Feb 2004 16:38:36 -0000
@@ -930,14 +930,21 @@
       if (finish == magick_arc_ellipse)
         DrawEllipse(WmfDrawingWand, XC(O.x), YC(O.y), Rx, Ry, 0, 360);
       else if (finish == magick_arc_pie)
-        DrawEllipse(WmfDrawingWand, XC(O.x), YC(O.y), Rx, Ry, phi_s, phi_e);
-      else if (finish == magick_arc_chord)
         {
-          DrawArc(WmfDrawingWand, XC(O.x), YC(O.y), Rx, Ry, phi_s, phi_e);
-          DrawLine(WmfDrawingWand, XC(start.x), YC(start.y), XC(end.x), YC(end.y));
+		  DrawPathStart(WmfDrawingWand);
+		  DrawPathMoveToAbsolute(WmfDrawingWand, XC(O.x+start.x), YC(O.y+start.y));
+		  DrawPathEllipticArcAbsolute(WmfDrawingWand, Rx, Ry, 0, 0, 1, XC(O.x+end.x), YC(O.y+end.y));
+		  DrawPathLineToAbsolute(WmfDrawingWand, XC(O.x), YC(O.y));
+		  DrawPathClose(WmfDrawingWand);
+		  DrawPathFinish(WmfDrawingWand);
         }
-      else      /* if (finish == magick_arc_open) */
-        DrawArc(WmfDrawingWand, XC(O.x), YC(O.y), Rx, Ry, phi_s, phi_e);
+        else if (finish == magick_arc_chord)
+        {
+          DrawArc(WmfDrawingWand, XC(draw_arc->TL.x), YC(draw_arc->TL.y), XC(draw_arc->BR.x), XC(draw_arc->BR.y), phi_s, phi_e);
+          DrawLine(WmfDrawingWand, XC(draw_arc->BR.x-start.x), YC(draw_arc->BR.y-start.y), XC(draw_arc->BR.x-end.x), YC(draw_arc->BR.y-end.y));
+        }
+        else      /* if (finish == magick_arc_open) */
+          DrawArc(WmfDrawingWand, XC(draw_arc->TL.x), YC(draw_arc->TL.y), XC(draw_arc->BR.x), XC(draw_arc->BR.y), phi_s, phi_e);
     }
 
   /* Restore graphic wand */