Comments on: Fixing PNGs http://www.red-sweater.com/blog/2517/fixing-pngs Mac & Technology Writings by Daniel Jalkut Fri, 10 Oct 2014 04:19:48 +0000 hourly 1 http://wordpress.org/?v=4.0 By: Chris Lindley http://www.red-sweater.com/blog/2517/fixing-pngs/comment-page-1#comment-271868 Fri, 08 Jun 2012 12:22:15 +0000 http://www.red-sweater.com/blog/?p=2517#comment-271868 …. a clue to a forthcoming reason to buy an iPad?

]]>
By: Clark http://www.red-sweater.com/blog/2517/fixing-pngs/comment-page-1#comment-271827 Mon, 04 Jun 2012 20:46:40 +0000 http://www.red-sweater.com/blog/?p=2517#comment-271827 Got to agree with Jens. Apple should have used a different extension for these files. I don’t understand why they didn’t.

]]>
By: Tom Harrington http://www.red-sweater.com/blog/2517/fixing-pngs/comment-page-1#comment-271795 Sat, 02 Jun 2012 21:54:24 +0000 http://www.red-sweater.com/blog/?p=2517#comment-271795 For those who use bash instead of zsh, I wrote an alternate version of the fixing and fixings functions, which are available at https://gist.github.com/2855867

]]>
By: Michael Tsai - Blog - Reverting Apple’s “PNG’s” http://www.red-sweater.com/blog/2517/fixing-pngs/comment-page-1#comment-271783 Fri, 01 Jun 2012 20:00:56 +0000 http://www.red-sweater.com/blog/?p=2517#comment-271783 [...] Daniel Jalkut: Essentially, the authors of this tool figured out the optimizations that Apple were doing, and reversed the steps to convert them back into standard PNG images. The tool relied upon a compiled-in version of the libpng library. [...]

]]>
By: Red Sweater Blog – Fixing PNGs « Carsten Schabacker http://www.red-sweater.com/blog/2517/fixing-pngs/comment-page-1#comment-271781 Fri, 01 Jun 2012 19:22:30 +0000 http://www.red-sweater.com/blog/?p=2517#comment-271781 [...] Via Red Sweater Blog – Fixing PNGs. Posted Friday, June 1st, 2012 (6 minutes ago) under Tools. [...]

]]>
By: Jens Ayton http://www.red-sweater.com/blog/2517/fixing-pngs/comment-page-1#comment-271777 Fri, 01 Jun 2012 19:00:22 +0000 http://www.red-sweater.com/blog/?p=2517#comment-271777

The reason most PNG images in iOS apps are not viewable is because Apple applies special, non-standard optimizations

This is true in a technical sense, but a more accurate description of the issue is that they are not PNGs despite using a PNG header and similar file structure and purloining the .png extension.

The PNG specification has very specific conformance requirements specifically to avoid incompatible variants popping up, and disguising the iPhone-optimized pictures as PNGs is a downright Microsoftishly destructive thing to do.

]]>
By: Dan Studnicky http://www.red-sweater.com/blog/2517/fixing-pngs/comment-page-1#comment-271776 Fri, 01 Jun 2012 18:39:06 +0000 http://www.red-sweater.com/blog/?p=2517#comment-271776 …Tell us more about this “Marsedit Touch” thing.

]]>