[gdal-dev] WEBP in GEOTIFF

[Even Rouault]

> Ubuntu has shipped for a long time libjpeg-turbo as the system libjpeg.so.8.
> It has the same ABI and behaviour as the corresponding IJG version, so it
> can be used as a complete replacement.
> 
> If you want to check:
> objdump -T /usr/lib/x86_64-linux-gnu/libjpeg.so.8 | grep LIBJPEGTURBO
> 
> 0000000000000000 g    DO *ABS*	0000000000000000  LIBJPEGTURBO_8.0
> LIBJPEGTURBO_8.0
> 

For the sake of completness, I should also mention that if you build GDAL
--with-jpeg=internal, it will *NOT* use a libjpeg-turbo copy. The internal copy of libjpeg in 
GDAL is the venerable IJG 6.2b (with one or two security patches), that has no SIMD 
acceleration. For those wondering, upgrading this internal copy to libjpeg-turbo would be 
complicated due to libjpeg-turbo using a few assembly source files, which would 
seriously complicate the GDAL build system.

-- 
Spatialys - Geospatial professional services
http://www.spatialys.com
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