gnuplot-info

[Gnuplot-info] generate png file yet complaining gdImageStringFT: Could not find/open font ...

[Jon <dev...@gm...>]

Hello Guys,

I tried to generate png file. I firstly tried

convert aaa.eps -resize 640 480 aaa.png

outside gnuplot, but the plot is smeared out due to magnification.

So, I tried to generate png file within gnuplot using set term png, but it
complains

gdImageStringFT: Could not find/open font while printing string Experiment
with font Times-Roman
gdImageStringFT: Could not find/open font while printing string Experiment
with font Times-Roman
gdImageStringFT: Could not find/open font while printing string Calculation
with font Times-Roman
gdImageStringFT: Could not find/open font while printing string Calculation
with font Times-Roman
...

I did some google search and found that it could be that png cannot find the
required path to the font, so I included the path as the following,

set term png font "/home/.../fmaker55/fminit/fontdir/Times-Roman.pfa" 12
enhanced

this is the only Times-Roman file I can find in the computer with ttf or pfa
surrfix.

But it still complains the same thing.

Any idea to help me solve the png generation problem?

Thanks a lot!

Sincerely,
Jon

Re: [Gnuplot-info] generate png file yet complaining gdImageStringFT: Could not find/open font ...

[Tatsuro M. <tma...@ya...>]

Hello

What version gnuplot are you using now?
Which platform are you using ?

The png terminal depends on the libgd. 

>From version 4.4 of gnuplot, 

- External support library libgd version 2.0.36 introduces a new method
of font selection using the fontconfig utitily. We try to automatically
accommodate this, but it has not been extensively tested.

Anyway, for the traditional style font selection (before 4.4),
please read

help gd

The environmental variable 
 GDFONTPATH
is important.

For the font selection via fontconfig are also used for the wxt, pngcairo, and pdfcairo.
The existence and location of etc/fonts/fonts.conf is important.



--- Jon  wrote:

> Hello Guys,
> 
> I tried to generate png file. I firstly tried
> 
> convert aaa.eps -resize 640 480 aaa.png
> 
> outside gnuplot, but the plot is smeared out due to magnification.
> 
> So, I tried to generate png file within gnuplot using set term png, but it
> complains
> 
> gdImageStringFT: Could not find/open font while printing string Experiment
> with font Times-Roman
> gdImageStringFT: Could not find/open font while printing string Experiment
> with font Times-Roman
> gdImageStringFT: Could not find/open font while printing string Calculation
> with font Times-Roman
> gdImageStringFT: Could not find/open font while printing string Calculation
> with font Times-Roman
> ...
> 
> I did some google search and found that it could be that png cannot find the
> required path to the font, so I included the path as the following,
> 
> set term png font "/home/.../fmaker55/fminit/fontdir/Times-Roman.pfa" 12
> enhanced
> 
> this is the only Times-Roman file I can find in the computer with ttf or pfa
> surrfix.
> 
> But it still complains the same thing.
> 
> Any idea to help me solve the png generation problem?
> 
> Thanks a lot!
> 
> Sincerely,
> Jon
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Re: [Gnuplot-info] generate png file yet complaining gdImageStringFT: Could not find/open font ...

[Julien R. <jr...@ph...>]

On 12/11/2010 2:09 PM, Jon wrote:
> convert aaa.eps -resize 640 480 aaa.png
>
> outside gnuplot, but the plot is smeared out due to magnification.
>

use an higher density of pixels for rasterizing, and more output pixels:
convert -density 1000 -resize 3200x2400 aaa.eps aaa.png

but best to leave out the -resize part and just tweak the correct number 
for -density for the desired output size.

Cheers,
Julien

Re: [Gnuplot-info] generate png file yet complaining gdImageStringFT: Could not find/open font ...

[Jon <dev...@gm...>]

Thank you so much! I think it works.

Sincerely,
Jon


On Fri, Nov 12, 2010 at 1:31 PM, Julien Rioux <jr...@ph...>wrote:

> On 12/11/2010 2:09 PM, Jon wrote:
> > convert aaa.eps -resize 640 480 aaa.png
> >
> > outside gnuplot, but the plot is smeared out due to magnification.
> >
>
> use an higher density of pixels for rasterizing, and more output pixels:
> convert -density 1000 -resize 3200x2400 aaa.eps aaa.png
>
> but best to leave out the -resize part and just tweak the correct number
> for -density for the desired output size.
>
> Cheers,
> Julien
>
>
>
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