rrdtool not honoring fonts passed via --font

[human]

I found this:  https://lists.oetiker.ch/pipermail/rrd-users/2008-June/014147.html

And did the same test on my system running rrdtool 1.3.8 It is not honoring the font calls when I pass in the path to the font. It's only opening the default font. I discovered this via cacti, when I tried to change fonts that cacti is using to generate specific parts of the graph.

Here's a really nasty command line:

strace -fFv -s 1000 /usr/bin/rrdtool graph /tmp/test.png --imgformat=PNG --start=-86400 --end=-300 --title="nosgoth domain0 - UPS Load Capacity - cyberpower" --rigid --base=1000 --height=120 --width=500 --upper-limit=100 --lower-limit=0 --vertical-label="percent" --slope-mode --font TITLE:12:/usr/local/share/fonts/ProggySquare.ttf --font AXIS:8:/usr/local/share/fonts/victor-pixel.ttf --font LEGEND:6:/usr/local/share/fonts/Fleftex_M.ttf --font UNIT:6:/usr/local/share/fonts/HILOGI18.ttf DEF:a="/usr/share/www/cacti-0.8.7e/rra/4/51.rrd":batteryCharge:AVERAGE DEF:b="/usr/share/www/cacti-0.8.7e/rra/4/51.rrd":upsLoad:AVERAGE AREA:a#74C366FF:"Battery Charge" GPRINT:a:LAST:"Current\:%8.2lf %s" GPRINT:a:MIN:"Minimum\:%8.2lf %s" GPRINT:a:MAX:"Maximum\:%8.2lf %s" GPRINT:a:AVERAGE:"Average\:%8.2lf %s\n" AREA:b#862F2FFF:"Output Load" GPRINT:b:LAST:" Current\:%8.2lf %s" GPRINT:b:MIN:"Minimum\:%8.2lf %s" GPRINT:b:MAX:"Maximum\:%8.2lf %s" GPRINT:b:AVERAGE:"Average\:%8.2lf %s\n" 2>&1 | grep -i ttf | grep open

open("/usr/share/fonts/TTF/Vera.ttf", O_RDONLY) = 3 open("/usr/share/fonts/TTF/VeraMono.ttf", O_RDONLY) = 3

As you can see, it's not opening any fonts.

The fonts are globally readable: ls -lh /usr/local/share/fonts total 208K -rw-rw-r-- 1 root root 17K Mar 8 12:35 Fleftex_M.ttf -rw-rw-r-- 1 root root 9.5K Mar 8 12:35 HILOGI00.ttf -rw-rw-r-- 1 root root 9.6K Mar 8 12:35 HILOGI18.ttf -rw-rw-r-- 1 root root 28K Mar 8 12:35 HILOGI71.ttf -rw-rw-r-- 1 root root 4.4K Mar 8 12:35 ProggySquare?.fon -rw-rw-r-- 1 root root 41K Mar 8 12:35 ProggySquare?.ttf -rw-rw-r-- 1 root root 4.4K Mar 8 12:35 ProggySquareConsole?.fon -rw-rw-r-- 1 root root 4.4K Mar 8 12:35 ProggySquareSZ.fon -rw-rw-r-- 1 root root 41K Mar 8 12:35 ProggySquareSZ.ttf -rw-rw-r-- 1 root root 23K Mar 8 12:35 victor-pixel.ttf

if I export RRD_DEFAULT_FONT: export RRD_DEFAULT_FONT=/usr/local/share/fonts/ProggySquare.ttf And rerun the commands I still don't see any opening of the font.

I tried to apply the patch mentioned in the follow up email to the thread, but it doesn't apply.

Thanks, David Kowis dkowis@…

[oetiker]

David,

note that rrdtool 1.3.x and newer user pango and thus fontconfig to render its fonts. Fonts you pass via the --font option must be known by fontconfig. type fc-list to see a list of fonts on your system.

cheers tobi

[human]

Actually, it's even better than that. Cacti doesn't support passing font's known by fontconfig. They've supposedly fixed it, but for some reason it's not in their actual code base.

Thanks for the quick response, though

David