Re: [boost] Formal Review of IO and Toolbox extensions to Boost.GIL starts TOMORROW

Subject: Re: [boost] Formal Review of IO and Toolbox extensions to Boost.GIL starts TOMORROW
From: Phil Endecott (spam_from_boost_dev_at_[hidden])
Date: 2010-12-09 10:44:17

Andreas Pokorny wrote:
> 2010/12/7 Domagoj Saric <dsaritz_at_[hidden]>:
>> IMO the easiest way to handle the setjmp/longjmp issues for those that have
>> to use the LibJPEG and/or LibPNG backends would be to simply skip the xjmp
>> functions altogether and throw proper C++ exceptions from the error
>> handlers...This might require (re)building the backend lib (and possibly
>> linking statically) with C++ exceptions enabled on some platforms but this
>> might prove to be easier in the end/long run...
>
> I think we should get rid of those backends entirely. Phil stated
> interesting use cases in a different thread, that might not be
> accomplished with these libraries.

No, the case that you're referring to works fine with libjpeg, libpng, 
and libtiff.  What it doesn't work with is the way that Christian's 
code has integrated them with GIL.

> There are alternatives to using libpng and libjpeg:
> * LodePNG: http://members.gamedev.net/lode/projects/LodePNG/
> * STB_Image http://nothings.org/stb_image.c
>
> I havent used the stb jpeg loader, but I switched to lodepng for the
> non-gil code.

A scheme more like what Domagoj and I have been proposing would allow 
one to add support for additional backends quite easily.

Regards,  Phil.