[rrd-users] Re: Blurred colours in png images

Florian Hinzmann florian.hinzmann at mcs.de
Thu Nov 3 16:29:24 MET 2005

On Wed, 26 Oct 2005 13:38:05 +0200
Florian Hinzmann <florian.hinzmann at mcs.de> wrote:

> I am experiencing strange problems with generated images. Text and
> areas are working fine, but you can only guess where lines are. The
> lines look like they have been blurred in vertical directions. The
> blurred traces reach the very top and very bottom of the generated 
> image. That is: They do not stop at the border of the "graph area",
> but extend into the legend.
> This problem is reproducable calling rrd-examples/4charts.pl . You
> can see an example of "4charts-A.png" here:
> http://www.coolsome.de/butch/tmp/rrdtool-broken-img-1-4charts-A.png

I did not solve this problem yet. A simpler example is generated
by the following lines:

rrdtool create test.rrd --start 1130940000 -s 1 DS:test:GAUGE:1:0:10 RRA:AVERAGE:0.5:1:10
rrdtool updatev test.rrd  1130940001:3 1130940002:0 1130940003:6 1130940004:6 1130940005:6 1130940006:9 1130940007:2 1130940008:8 1130940009:3
rrdtool fetch test.rrd AVERAGE -s 1130940001 -e 1130940009
rrdtool graph test.png -s 1130940001 -e 1130940009 DEF:test=test.rrd:test:AVERAGE LINE:test#000000:"Test values"

The result can be seen here: http://www.coolsome.de/butch/tmp/rrdtool-broken-img-test.png

Another result of my tests: This happens only with format PNG. 
Formats EPS, SVG and PDF are fine.

Any help appreciated!


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