Category: Pngtools

pngtools, code that can nearly drink in the US

I was recently contacted about availability problems with the code for pngtools. Frankly, I’m mildly surprised anyone still uses this code, but I am happy for them to do so. I have resurrected the code, placed it on github, and included the note below on all relevant posts:

A historical note from November 2020: this code is quite old, but still actively used. I have therefore converted the old subversion repository to git and it is hosted at https://github.com/mikalstill/pngtools. I will monitor there for issues and patches and try my best to remember what I was thinking 20 years ago…

PNGtools 0.4

Wow, this is a blast from the past. When I wrote the pngchunks command in 2003, I had never seen a 64 bit machine, and knew enough to check that an int was the right size, but not enough to just use the guaranteed-to-be-32-bit version from day 1. I’d pretty much forgotten about this code until I got pinged about this Debian bug. The bug reporter is entirely right, this was lame.

PNGtools 0.4 should be 64 bit safe. The pngchunks command works on my 64 bit machines at least.

A historical note from November 2020: this code is quite old, but still actively used. I have therefore converted the old subversion repository to git and it is hosted at https://github.com/mikalstill/pngtools. I will monitor there for issues and patches and try my best to remember what I was thinking 20 years ago…

Pngtools 0.3 released

On the suggestion of Sven from the Gimp project I have added offset display to the features of pnginfo. It’s bundled in the 0.3 release.

A historical note from November 2020: this code is quite old, but still actively used. I have therefore converted the old subversion repository to git and it is hosted at https://github.com/mikalstill/pngtools. I will monitor there for issues and patches and try my best to remember what I was thinking 20 years ago…

PNGtools 0.2

Version 0.2 is now available. This implements the pngcp command, which can be used to edit the characteristics of PNG files. You can download the source from here.

A historical note from November 2020: this code is quite old, but still actively used. I have therefore converted the old subversion repository to git and it is hosted at https://github.com/mikalstill/pngtools. I will monitor there for issues and patches and try my best to remember what I was thinking 20 years ago…

My AOSS III Talk

The slides for my Australian Open Source Symposium talk are now available online. This talk covers Panda, PandaLex, PandaScript, PNGTools, and stuff like that.

A historical note from November 2020: these presentations are no longer useful due to their age and are no longer online due to hosting changes.

Initial public release

In line with the maxim “release early, release often”, here is the initial public viewing of my work on pngtools. At the moment, the only command that is implemented is pnginfo, which is pretty much there (apart from the command line options, which are rarely used).

I would welcome comments on the code, which can be sent to mikal@stillhq.com. The code is (c) Michael Still 2001, and is released under the GNU GPL version 2.

A historical note from November 2020: this code is quite old, but still actively used. I have therefore converted the old subversion repository to git and it is hosted at https://github.com/mikalstill/pngtools. I will monitor there for issues and patches and try my best to remember what I was thinking 20 years ago…