[Gnuplot-bugs] wrong font encoding (russian) in png/jpeg files

[Roman S. <mi...@ma...>]

hi,
please CC me in your answers.

system info (for formality):
mandrakelinux 10.0
linux 2.6.7 (from scratch)
glibc-2.3.3-10mdk
gcc-3.3.2-6mdk
libfreetype6-devel-2.1.8-1plf
libpng3-1.2.5-10mdk

libgd and gnuplot was compiled by myself (but the problem was in 
original mandrake gnuplot-3.7.3 and libgd 2.0.15; with my 
gnuplot-4.0.0 and libgd 2.0.28)

Now I have
$ gdlib-config  --version --features
2.0.28
GD_XPM GD_JPEG GD_FREETYPE GD_PNG GD_GIF

gnuplot from the cvs (20041009). configured with
  Enable generation of JPEG files
  Enable generation of GIF files
  Enable generation of PNG files
    using gd driver
  Enable TTF fonts with gd driver


OK. The description of the problem:
I'm trying to generate png/jpeg files with russian titles and it 
doesn't
work. I can see letters but they are in wrong encoding (latin1 
(iso-8859-1)
but not right koi8-r)

Simple examples:
#!/usr/local/bin/gnuplot

set encoding koi8r
set term postscript
set output "test.ps"
set title "Синусоида/Sinusoid"
plot sin(x)

And i can see russian glyphs title in gv. But i need png/jpeg.

The following example doesn't work

#!/usr/local/bin/gnuplot

set encoding koi8r
set term png font "/mnt/win_c/windows/Fonts/arial.ttf"
set output "test.png"
set title "Синусоида/Sinusoid" font 
"/mnt/win_c/windows/Fonts/arial.ttf,25"
plot sin(x)

I get test.png with iso8859-1, but the font contains russian 
glyphs (I can view them in kfontview)

My question:  is it problem of libgd or gnuplot? And is it 
possible to fix it?