PNG images in doc/hwdb-client/C/figures take too much space (more than 2.5 MB now !)

[Mantas Kriaučiūnas]

PNG images in doc/hwdb-client/C/figures take too much space (more than 2.5 MB now !)

It's pretty strange problem - it seems png images in help are not compressed, because simple opening these images with gimp or gthumb and then saving (with the same name) reduces size of images about 5 times !

You can use pngcrush utility for reducing .png size without losing any
info in .png files :) I've reduced size of all images about 6 times (to ~680kb) with simple command:

pngcrush -d recompressed_figures/ doc/hwdb-client/C/figures/*.png

[Mantas Kriaučiūnas (mantas)]

In Baltix GNU/Linux distribution I did
pngcrush -d recompressed_figures/ doc/hwdb-client/C/figures/*.png

[Matt Zimmerman (mdz)]

Confirmed, these images are much larger than they need to be.

[cellarguy (cellar-dweller)]

I think there is a problem with dapper's pngcrush. It's not up to date.

On the web, the latest version is
 pngcrush-1.6.3.tar.gz (as of 2006/05/01)

Running it on Dapper 6.06 I got this error message:
----
 pngcrush -d crushed *.png
Warning: versions are different between png.h and png.c
  png.h version: 1.2.7
  png.c version: 1.2.8

<snip blah blah>

pngcrush: relocation error: pngcrush: symbol png_read_data, version PNG12_0 not defined in file libpng12.so.0 with link time reference

[Matt Zimmerman (mdz)]

 hwdb-client (0.6-0ubuntu9) dapper; urgency=low
 .
   * help/C/figure/*.png:
     - applied pngcrush, saves 1,9 MB uncompressed

[Michael Vogt (mvo)]

I applied pngcrush on it and they are now only 750kb. Uploaded as 0.6-0ubuntu9