The character on the graph looks clipped when using some mono font with new version of rrdgraph

[k79e]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Just use the newest version 1.8.0 to generate graphs.
Using the font "WenQuanYi Micro Hei Mono"

Expected behavior
A clear and concise description of what you expected to happen.
It should not clipped

Screenshots
If applicable, add screenshots to help explain your problem.
The 'i' of min and the top of 120k is clipped

On the old version this is fine.

Desktop (please complete the following information):
Win7 x64

Additional context
Add any other context about the problem here.

[c72578]

@k79e Thanks for your report.
Could you please add the following information:

• Which version of rrdtool are you using?
  rrdtool-1.8.0-bin-mingw64.zip
  rrdtool-1.8.0-x64_vcpkg.zip
• What was the "old version"?
• Please provide a minimal example to reproduce the issue, which contains the required steps:
  Create the rrd file; set an example font, which causes the issue; draw the graph

[k79e]

I think tried both mingw and vc version.
Old version is previous version RRDtool 1.7.2.

Create a test.bat with

@set rrdfile=e\:\test.rrd

@rrdtool graph e:\test.png --vertical-label "Network Data" ^
--title "1Min Network Traffic Stats" --width 600 --height 250 -s end-100min -S 60s -n DEFAULT:0:"WenQuanYi Micro Hei Mono" ^
DEF:in=%rrdfile%:in:LAST ^
DEF:out=%rrdfile%:in:LAST ^
VDEF:imax=in,MAXIMUM  ^
VDEF:omax=out,MAXIMUM  ^
VDEF:imin=in,MINIMUM  ^
VDEF:omin=out,MINIMUM ^
AREA:out#00ff00:"OUT" ^
GPRINT:out:LAST:"Current\: %%5.1lf %%sbytes/min", ^
GPRINT:omin:"Low\: %%5.1lf %%sB/min", ^
GPRINT:omax:"Max\: %%5.1lf %%sB/min" ^
COMMENT:"\l" ^
LINE1:in#086ae5:"IN" ^
GPRINT:in:LAST:" Current\: %%5.1lf %%sbytes/min", ^
GPRINT:imin:"Low\: %%5.1lf %%sB/min", ^
GPRINT:imax:"Max\: %%5.1lf %%sB/min" ^
COMMENT:"\l"

Create a test rrdfile

rrdtool create test.rrd -s60 DS:in:DERIVE:120:0:U ^
RRA:LAST:0:1:1440
rrdtool update test.rrd -t in N:3
rrdtool update test.rrd -t in N:1

use cmd go into the newest version.
run the test.bat file
And use previous version to run test.bat

The newest version generated graph

Previous version's

I tested arial font and can't trigger bug. So maybe only the mono font can cause problem.
You need the font here
https://sourceforge.net/projects/wqy/files/wqy-microhei/0.2.0-beta/