[UMN_MAPSERVER-USERS] MapScript 4.8.1, PHP 5.12, and segmentation faults rendering TrueType

[David Badke]

We are having an odd problem with a new install of MapServer/MapScript 
4.8.1 on Red Hat Linux with PHP 5.12. Trying to generate a layer (via 
MapScript) containing TrueType fonts causes a segmentation fault when 
drawing (eg: $oImg = $oMap->draw()). Changing the map file to use bitmap 
fonts makes the error go away. The same map file run through MapServer 
cgi (using the sample template) generates the TrueType text correctly 
with no errors. The same MapScript PHP code running on a Windows XP 
(Apache) system, also with the same map file, works with TrueType. It's 
only MapScript on the Linux server that has a problem, and only with 
TrueType fonts - everything else works perfectly.

The server guys have recompiled everything, making sure the GD/FreeType 
versions are correct. As far as they are concerned, the installation is 
good to go. But still it crashes...

Any ideas the server guys can try?

David

--------------

The extremely simple PHP script is:

<?php
if (!extension_loaded('MapScript'))
   dl('php_mapscript.so');
$oMap = ms_newMapObj( 
'/home1t/taprhist/www/maps/user/map/vicbird1878.map' );
$oImg = $oMap->draw();
$szURL = $oImg->saveWebImage();
echo "<img src=$szURL>";
?>

The map file is:

MAP
 NAME "vicbird1878_map"
 STATUS ON
 EXTENT 0 -6739 10539 0
 SIZE 10540 6740
 SHAPEPATH "/home1t/taprhist/www/maps/user/data/"
 IMAGETYPE PNG
 IMAGECOLOR 156 170 177
 UNITS INCHES
 FONTSET "/home1t/taprhist/www/maps/user/font/fontset.fnt"
 SYMBOLSET "/home1t/taprhist/www/maps/user/symbol/generic.sym"
 DEBUG ON
 WEB
   IMAGEPATH "/home1t/taprhist/www/maps/htdocs/tmp/"
   IMAGEURL "http://lettuce.tapor.uvic.ca/~taprhist/maps/htdocs/tmp/";
   LOG "/home1t/taprhist/www/maps/htdocs/tmp/mapserv.log"
   TEMPLATE "/home1t/taprhist/www/maps/htdocs/ms_temp.html"
 END
 REFERENCE
   STATUS ON
   IMAGE "/home1t/taprhist/www/maps/user/data/vic1878key.png"
   SIZE 300 192
   EXTENT 0 -6739 10539 0
   COLOR -1 -1 -1
   OUTLINECOLOR 255 0 0
 END
 LEGEND
   STATUS ON
   TRANSPARENT ON
   KEYSIZE 20 10
   KEYSPACING 5 5
 END
 SCALEBAR
   STATUS OFF
   SIZE 200 3
 END
 LAYER
   NAME "Base"
   GROUP "Image"
   STATUS OFF
   DATA "vic1878.png"
   TYPE RASTER
 END
 LAYER
   NAME "Features"
   GROUP "Features"
   STATUS OFF
   DATA "vicbird1878"
   TYPE POINT
   MAXSCALE 200
   CLASS
     STYLE
       SYMBOL "triangle"
       COLOR 255 0 0
       SIZE 8
     END
   END
 END
 LAYER
   NAME "Labels"
   GROUP "Labels"
   STATUS DEFAULT
   DATA "vicbird1878"
   TYPE ANNOTATION
   LABELITEM "LABEL"
   MAXSCALE 150
   SYMBOLSCALE 71
   CLASS
     LABEL
       TYPE truetype
       FONT "webdings"
       ANTIALIAS FALSE
       SIZE 9
       POSITION UC
       OFFSET 0 8
       COLOR 0 0 0
       BACKGROUNDCOLOR 255 255 255
       MINSIZE 8
       MAXSIZE 10
       BUFFER 1
     END
   END
 END
END

--

David Badke
Humanities Computing and Media Center
University of Victoria, BC, Canada