読者です 読者をやめる 読者になる 読者になる

あいつの日誌β

あいつの日誌です。

あいつが本当に PNG か確かめたい

Memo
% brew install pngcrush
% pngcrush -n -v hoge.png

 | pngcrush 1.7.60
 |    Copyright (C) 1998-2002, 2006-2013 Glenn Randers-Pehrson
 |    Portions copyright (C) 2005       Greg Roelofs
 | This is a free, open-source program.  Permission is irrevocably
 | granted to everyone to use this version of pngcrush without
 | payment of any fee.
 | Executable name is pngcrush
 | It was built with libpng version 1.5.16, and is
 | running with  libpng version 1.5.16 - May 23, 2013

 |    Copyright (C) 1998-2004, 2006-2013 Glenn Randers-Pehrson,
 |    Copyright (C) 1996, 1997 Andreas Dilger,
 |    Copyright (C) 1995, Guy Eric Schalnat, Group 42 Inc.,
 | and zlib version 1.2.8, Copyright (C) 1995 (or later),
 |    Jean-loup Gailly and Mark Adler.
 | It was compiled with gcc version 4.2.1 Compatible Apple LLVM 4.2 (clang-425.0.28).

Opening file hoge.png for length measurement
Allocating read structure
Allocating read_info,  end_info structures

While measuring IDATs in hoge.png pngcrush caught libpng error:
   Not a PNG file..