Re: [boost] [gil] [announcement] New IO lib

From: John Femiani (JOHN.FEMIANI_at_[hidden])
Date: 2008-04-25 14:53:39

Christian wrote:

> >  Also, there are references to deail::read_and_no_convert used in  
> > read_image.hpp.  I can not find a declaration for 
> read_and_no_convert,  
> > did you forget to add a file to svn?
> 
> read_and _no_convert is defined in conversion_policies.hpp.
> 

Found it, fixed it, it compiles now.  There were some missing 'typename'
issues that had to be fixed, and I added newlines to the end of several
files. The new patch is attached.

Of course I was too lazy to test it on linux,  and I _only_ tested jpeg,
but mingw is a step in the right direction :)

> >  Is it possible to have read_image deduce the file format from the 
> > file /  filename itself?  That feature would make a gil io 
> lib. perfect for me.
> 
> I was thinking of adding that, as well. But it would 
> introduce the dependency to boost::filesystem. Not sure if 
> that's advisable since the io lib wouldn't be header only anymore.

What, for finding the extension?  You should not need filesystem for
that. 

Personaly I think there should be a separate header, and/or a macro, so
that overlaods supporting path can be used. 
It would be an 'optional' dependancy.

Anyhow, the library is already not header-only, it requires libpng,
jpeg6b, zlib, and libtiff. None of these seem work perfectly on windows
/ msvc without a little bit of tweaking (#defines conflict, etc).  

Can you provide some exampes, perhaps add an 'examples' folder and/or a
'tests' folder with some code that shows how the library can be used.

-- John