Re: [png-mng-implement] libpng-1.6.0rc01 is available

[Thomas K. <tk...@gi...>]

Hi John!

On Sat, Jan 26, 2013 at 02:04:41PM -0800, John Bowler wrote:
> On Sat, Jan 26, 2013 at 1:05 PM, Thomas Klausner <tk...@gi...> wrote:
> > Are any existing API calls deprecated? I.e., how much existing
> > software that compiles against 1.5.4 do you think will need additional
> > patches?
> 
> Yes, there are new deprecated APIs in 1.6, they will be removed in
> 1.7, and anything deprecated in 1.5 has been removed from 1.6.
> However I've been running 1.6 on Gentoo for about a year now, and am
> actually running 1.7 at present.  The only private build I have (i.e.
> the only thing I have a Gentoo overlay for to work round libpng
> compilation issues) is graphicsmagick.  That's only because I have to
> build GraphicsMagick 1.4 and Gentoo is stuck at 1.3 for some reason.
> 
> To find the deprectated APIs just search png.h for the string PNG_DEPRECATED.
> 
> 1.5.13 deprecates (only) png_get_io_chunk_name
> 1.6.0 removes png_get_io_chunk_name and deprecates:
>    png_reset_zstream (I don't believe any application uses this.)
>    png_info_init_3 (I don't think this can actually be used outside libpng!)
>    png_convert_to_rfc1123 - this may require changes for 1.7
>    png_data_freer (I don't think this works in general, I don't
> believe any application uses it.)
>    png_malloc_default (this may require changes in the future, but
> I've yet to find an application that calls it.)
>    png_free_default (the same comment applies)
> 
> My builds with 1.7 (which has all the above 1.6 deprecated APIs
> removed) have yet to reveal any problems.

Thanks for this encouraging reply :)
 Thomas