Added jpeg support to picogui. I used the jpeg library
that's freely available under GPL. (jpeg-6b from the Independent
JPEG Group, date 27-Mar-1998. http://www.ijg.org/) It is the most
recent release on their download site.
Configuration option is CONFIG_FORMAT_JPEG, and it is disabled
by default. I added it's entry as not defined in profile.defaults.
I have also supported the --with-jpeg-dir=DIR option for the
configure script. This is useful if cross-compiling. DIR needs
to have libjpeg.a (if static), libjpeg.so.* and jpejlib.h in
it, for it to be found correctly. If you do not require a special
version of libjpeg, the configure script should automatically locate
an installed version of the library if it exists.
(If not, go to the website and download and install their latest
version.)
I added a jpeg test file in to the cli_c/demos/data directory.
I tested the new code using imgview in the cli_c/demos directory.
I tested with a SDL/native configuration and a cross-compiled
uclinux version on ARM.
The currently library is fairly large, which is why it's disabled
by default. I suspect the jpeg library code for reading could be
easily extracted out for a smaller binary if necessary.
Let me know if you have questions, or if I goofed something
up. I tried to be careful.
Eric
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