Re: buggy rotation of non-scalable font

[<pl...@pi...>]

On 04/12/11 19:02, Ethan Merritt wrote:
> On Tuesday, April 12, 2011 01:28:26 am pl...@pi... wrote:
>> Hi,
>>
>> I just tried outputting to png terminal and it failed to find a scalable
>> font. I have not found out why yet, but I don't recall this error last
>> time I did this a few months back.
>
> Sounds like a problem with libgd.
> Check your environmental variable GDFONTPATH.

Correct , that is not set but apparently that was not needed a month or 
so ago.

My Xorg.0.log shows this, so clearly the fonts are available.

[  1665.111] (**) FontPath set to:
   /usr/share/fonts/corefonts,
   /usr/share/fonts/100dpi:unscaled,
   /usr/share/fonts/75dpi:unscaled,
   /usr/share/fonts/TTF,

ls   /usr/share/fonts/corefonts/arial* -l
-rw-r--r-- 1 root root 286620 Jun 29  2010 
/usr/share/fonts/corefonts/arialbd.ttf
-rw-r--r-- 1 root root 224692 Jun 29  2010 
/usr/share/fonts/corefonts/arialbi.ttf
-rw-r--r-- 1 root root 206132 Jun 29  2010 
/usr/share/fonts/corefonts/ariali.ttf
-rw-r--r-- 1 root root 275572 Jun 29  2010 
/usr/share/fonts/corefonts/arial.ttf

So is this a change in xorg, gdlib or the way I'm using gnuplot?

Exporting GDFONTPATH fixed it but  I don't quite see why it is now 
necessary to clutter my env even further .


>
>> gnuplot>  load "foo.gnu
>> Could not find/open font when opening font "arial", using internal
>> non-scalable font
>>
>>
>> However, the result of this is text misplacement.
>>
>> set xtics out nomirror  rotate by -45
>>
>> Now it seems that 45-rotation is not possible with whatever font it
>> substituted but what it did output was the tick label going straight
>> upwards from the origin (close to the tick mark) where the rotated text
>> would have started.
>>
>> There seem to be two problems here.
>>
>> 1/ rotate -45 should slope down to the right. Here it IS rotated but +90
>> , no rotation or -90 would be a better fall-back.
>>
>> 2/ if it does rotate up the origin is totally wrong (ie not recalculated
>> for the actual rotation) and dumps all over the plot area.
>>
>>
>> My guess from the behaviour is that the actual rotation is a bug rather
>> than a fall-back , or at least a buggy fall-back.
>
> The fonts internal to libgd are non-rotatable, although the orientation of
> the pixel array can be transposed to give +/- 90 degree orientation.
> Given that rotatable fonts (ttf, otf, pfa, etc) are ubiquitous these days,
> I don't think it's worth much effort trying to figure out which emergency
> fallback orientation of a non-rotatable font is least wrong.
>
>> This was running std release version 4.2.2
>
> If that's not a typo for 4.4.2, you're talking about a ~5 year old version.
> No further releases in the 4.2 series are likely to happen,
> so bug reports should be made against 4.4 or 4.5.

Yes , dyslexia rules, K.O !!

regards. Peter.

>
> 	Ethan
>
>
>>
>> regards. Peter.
>>