[Mapserver-users] JPEG input

[Jan Hartmann]

OK Assefa, it works now. Thanks. Compilation of MapServer broke down at 
first, because it looked for gdal.pdb, which is gdal11.pdb in CVS. After 
that everything ran fine. I still don't understand why GDAL's internal 
jpeg library is different from the official one (size? mapserv.exe is 
50K larger now than before), but it works. Great help!

Jan

Yewondwossen Assefa wrote:
> The reason It is happening (at least in my case) is the fact that GDAL was
> build with an internal jpeg library that is diffrent with the one used in
> mapserver and gd.
> Making sure that you use the same library should solve the problem.
> 
>  For windows users building GDAL, I have added some flags in the nmake.opt
> to be able to specify external jpeg and png libraries. Flags are :
> 
>  #if using an external jpeg library uncomment the follwing lines
> JPEG_EXTERNAL_LIB = 1
> JPEGDIR = c:/projects/jpeg-6b
> JPEG_LIB = $(JPEGDIR)/libjpeg.lib
> 
> #if using an external png library uncomment the follwing lines
> PNG_EXTERNAL_LIB = 1
> PNGDIR = c:/projects/libpng-1.0.8
> PNG_LIB = $(PNGDIR)/libpng.lib
> 
> 
>  Note also that in the jpeg directory, I have created a libjpeg folder
> where all the jpeg files were moved. So make sure to grab that directory
> when you do an update (and also make sure that you do not have any headers
> and source files (*.c *.h) in the jpeg directory. They have been removed
> from CVS but may still reside locally on your machines.)
> 
> Later,
> 
> Jan Hartmann wrote:
> 
> 
>>Hello,
>>
>>I'm trying to display a jpeg input image and get the following error
>>message:
>>
>>JPEG parameter struct mismatch: library thinks size is 432, caller
>>expects 464
>>
>>Platform: Win2000, VC++
>>Mapserver: CVS, compiled with and without JPEG input support (jpeg-6b)
>>GD: 2.0.11, compiled with jpeg-6b
>>GDAL: 1.1.8
>>
>>I diffed the jpeg files under GDAL with the jpeg-6b distribution and
>>found no differences. Yet there seems to be a version mismatch
>>somewhere. Outputting JPEG is no problem. Has anyone any ideas?
>>
>>Jan
>>
>>_______________________________________________
>>Mapserver-users mailing list
>>Mapserver-users at lists.gis.umn.edu
>>http://lists.gis.umn.edu/mailman/listinfo/mapserver-users
> 
> 
> --
> ----------------------------------------------------------------
> Assefa Yewondwossen
> Software Analyst
> 
> Email: assefa at dmsolutions.ca
> http://www.dmsolutions.ca/
> 
> Phone: (613) 565-5056 (ext 14)
> Fax:   (613) 565-0925
> ----------------------------------------------------------------
> 
> 
> 
>