[mapserver-users] Re: Transparent outline

Wed, 31 Jul 2002 17:15:43 -0400

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Sidnei de Souza  writes:
  I think what is really happening is that MapServer is drawing the polygons
always with outline.
  If I specify "outlinecolor -1 -1 -1" or don't specify outlinecolor at all,
it draws the outline with the same color used to fill the polygon.

  We tested the same layer on ArcView and if we ask ArcView to use
outlinecolor = fill color, the result is the same as MapServer. If we ask
ArcView not to use outline, the result is equal to MapObjects.

  Any new ideas on this? Please!

  You could test your hypothesis by changing the 'C" code in mapprimitive.c

  FROM

  void msImageScanline(gdImagePtr im, int x1, int x2, int y, int c)
  {
    int x;

    for(x=x1; x<=x2; x++)
      gdImageSetPixel(im, x, y, c);
  }

  TO

  void msImageScanline(gdImagePtr im, int x1, int x2, int y, int c)
  {
    int x;

    for(x=x1+1; x<x2; x++)
      gdImageSetPixel(im, x, y, c);
  }

  Note I am not really sure of all of the ramifications of doing this but
...

  it should make a good test and if this gives the results that you want

  I will look further into this :-)

  Cheers

  Norman

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<BODY>
<DIV>Sidnei de Souza<SPAN=20
class=3D00130921-31072002>&nbsp;=20
writes:&nbsp;</DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px =
solid; MARGIN-RIGHT: 0px">I=20
 think what is really happening is that MapServer is drawing the =
polygons=20
 always with outline.=20
 If I specify "outlinecolor -1 -1 -1" or don't specify outlinecolor =
at all,=20
 it draws the outline with the same color used to fill the polygon.=20
 We tested the same layer on ArcView and if we ask ArcView to use=20
 outlinecolor =3D fill color, the result is the same as MapServer. If =
we ask=20
 ArcView not to use outline, the result is equal to MapObjects.=20
 Any new ideas on this? Please!&nbsp;<FONT=20
 face=3DArial color=3D#0000ff size=3D2>&nbsp;
 You=20
 could test your hypothesis by changing the 'C" code in=20
 mapprimitive.c
 FROM
 void=20
 msImageScanline(gdImagePtr im, int x1, int x2, int y, int =
c) { &nbsp;=20
 int x;
 &nbsp;=20
 for(x=3Dx1; x&lt;=3Dx2; x++) &nbsp;&nbsp;&nbsp; gdImageSetPixel(im, =
x, y,=20
 c); }
 TO
 void=20
 msImageScanline(gdImagePtr im, int x1, int x2, int y, int =
c) { &nbsp;=20
 int x;
 &nbsp;=20
 for(x=3Dx1+1; x&lt;x2; x++) &nbsp;&nbsp;&nbsp; gdImageSetPixel(im, =
x, y,=20
 c); }
 Note I=20
 am not really sure of all of the ramifications <SPAN=20
 class=3D00130921-31072002>of doing this=20
 but ...
 it=20
 should&nbsp;make&nbsp;a good test and if this gives the results that =
you=20
 want
 I will=20
 look further into this :-)
 Cheers
 Norman</BLOCKQUOTE></BODY></HTML>

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