Top > All Packages in Directory > Pngcheck

Pngcheck - PNG integrity tester and dumper/debugger

'Pngcheck' is the official PNG tester and debugger. It verifies the integrity of PNG, JNG and MNG files by checking the internal 32-bit CRCs or checksums, and optionally dumps almost all of the chunk-level information in the image in human-readable form. For example, it can be used to print the basic stats about an image (dimensions, bit depth, etc.); to list the color and transparency info in its palette; or to extract the embedded text annotations.

Originally designed simply to test the CRCs within a PNG image file (e.g., to check for ASCII rather than binary transfer), it has since been extended to check and optionally print almost all the information about a PNG image and to verify that the image conforms to the PNG specification. The program supports all PNG and JNG chunks, plus almost all MNG chunks (everything but PAST, DISC, tERm, DROP, DBYK, and ORDR).

Obtaining

Web pagehttp://www.libpng.org/pub/png/apps/pngcheck.html
Source tarballhttp://www.libpng.org/pub/png/src/pngcheck-1.99.3.tar.gz
Version 1.99.3 (stable) released on 2000-09-03
Licensed under an X11-style license.
This is not a GNU package.

Support contacts

Help List<newt@pobox.com>
Developer List<newt@pobox.com>
Bug List<newt@pobox.com>

Project contacts

Maintainers
Developers
Contributors

Related information

Interfacescommand line
Source languagesC
Weak prerequisiteszlib

Entry information

License verified byJanet Casey <jcasey@gnu.org> on 2002-07-29
Entry compiled byJanet Casey <jcasey@gnu.org>

Categories


The copyright licensing notice below applies to this text. The software described in this text has its own copyright notice and license, which can usually be found in the distribution itself.

Copyright © 2000, 2001, 2002, 2003 Free Software Foundation, Inc.

Permission is granted to copy, distribute, and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of this license is included in the file COPYING.DOC.

Please report any problems in this page to bug-directory@gnu.org, or find out how you can help fix them.

The FSF provides this directory as a service to the free software community. Please consider donating to the FSF to help support this project.