[Gdal-dev] GDAL+MrSID on Apache+MapServer in Chameleon application

[Peter Kingsbury]

Hello all,

I am attempting to enable MrSID functionality in Chameleon, and have 
come to a roadblock. I am trying to compare performance between SID and 
TIF files, to see if it is a viable format for my application.

The host is Windows XP SP2, GDAL 1.3.0 + MrSID on Apache 4 + MapServer 
(MS4W), using the Chameleon application.

I've been ekeing my way through compiling the GDAL library, learning how 
to integrate the DLL into Apache, and expose the SID 
decompression/display in Chameleon. So far I've been compiling the DSDK 
from Lizardtech alright, and I've (to my knowledge) pointed the 
apache.conf GDAL plugin variable to the correct directory (have tried 
relative and absolute).

I've also modified nmake.opt as follows, and compiled GDAL afterward. 
The resulting gdal13.dll is larger than without the below options, so I 
am assuming it worked properly.
#########################################################
# Uncomment the following for MrSID support.
# You will likely require /MD and /EHsc in OPTFLAGS.
MRSID_DIR =    C:\Development\SDK\Geo_DSDK-5.0.6.955
MRSID_INCLUDE = -I$(MRSID_DIR)\include\base -I$(MRSID_DIR)\include\support \
        -I$(MRSID_DIR)\include\metadata \
        -I$(MRSID_DIR)\include\mrsid_readers \
        -I$(MRSID_DIR)\include\j2k_readers
MRSID_LIB =    $(MRSID_DIR)\lib\Release_md\lti_dsdk_dll.lib advapi32.lib 
user32.lib
# Enable these, if you have the MrSID Encoding SDK and want
# to create MrSID files
#MRSID_FLAGS =    -DMRSID_ESDK_VERSION_40 $(MRSID_FLAGS)
#MRSID_INCLUDE = -I$(MRSID_DIR)\include\mrsid_writers \
#        -I$(MRSID_DIR)\include\j2k_writers $(MRSID_INCLUDE)
#MRSID_LIB =    $(MRSID_DIR)\lib\Release_md\lti_esdk_dll.lib $(MRSID_LIB)-
# Enable the following if you prefer to build MrSID support as a plugin.
#MRSID_PLUGIN = YES
#########################################################

My apache.conf plugin section looks like this. I have also tried the 
relative path option, same results.
#########################################################
# set GDAL_DATA environment variable to location of supporting gdal files
SetEnv GDAL_DATA "/ms4w/gdaldata"

# set GDAL_DRIVER_PATH environment variable for gdal plugins
#SetEnv GDAL_DRIVER_PATH "/ms4w/gdalplugins"
SetEnv GDAL_DRIVER_PATH "C:/ms4w/gdalplugins"
#########################################################

However, after restarting Apache, and I pointing my Chameleon MAP file 
to the SID files in the data directory (same dir where the working TIF 
files exist), a broken map image link results.

I'm not really sure where to go from here, so I thought I would try a 
few different avenues of support before I pull my hair out :)

Can anyone point me in the correct direction to reach my goal?

Best regards,
- Peter