Non-Latin characters in graphs?

[technow0rker]

Hello.

Can I use cyrillic characters when drawing text in Zabbix graphs? Maybe I'm doing something wrong, because currently cyrillic strings are not displayed (displayed as unreadable characters). I suppose this is more PHP/GD issue than a Zabbix one, but maybe someone knows how to deal with this? Or maybe I should use different (i.e. UTF-8) encoding? (I use windows-1251 for now).

Some useful links:

GD KOI8 fonts

http://www.sai.msu.su/~megera/tips/gd/

Terminus font collection and some useful tools

http://www.is-vn.bg/hamster/jimmy-en.html

Tool: trbdf - convert BDF-font from one encoding to other

http://www.penguin-soft.com/penguin/man/1/trbdf.html

[technow0rker]

After digging google I've found answer for the question above. It's defitively a GD issue. One should find appropriate fonts for particular encoding and recompile GD library, because Zabbix uses GD built-in fonts and they contain only latin characters (AFAIK). Will try to do so soon

[Darken]

It can be done by editing php frontend code.

For ZABBIX v.1.0 I successfully draw a cyrillic characters on graphs and maps by using an UTF-8 fonts and replace "ImageString" function with "ImageTTFText" in php-frontend code. And You also should use an appropriate encoding in database. I am currently useing MySQL, database was setup only once a log time ago with koi8-u charset.
For ZABBIX 1.0 it was ease. In version 1.1 the frontend code become more complex and it was mush harder for me to find out a plase where to make replacement. Currently I just made quick upgrade to 1.1.4 and unfortunately forgot to backup my changes, so now I will try to find the way to replace a default font that use "ImageString", if not - I'll adit the php frontend code once more.
Here an example of my "code replacement" form version 1.0:
{ZABBIX_HOME}/html/chart4.php:110:
//$x=imagesx($im)/2-ImageFontWidth(4)*strlen($str)/2;
//ImageString($im, 4,$x,1, $str , $darkred);
$font="/usr/java/j2re1.4.2_04/lib/fonts/LucidaSansRegular.ttf";
$str=iconv('KOI8-U','UTF-8',$str);
$pos=ImageTTFBBox(10,0,$font,$str);
$x=(imagesx($im)-($pos[2]-$pos[0]))/2;
ImageTTFText($im,10,0,$x,13,$darkred,$font,$str);
{ZABBIX_HOME}/html/chart5.php:102:
//$x=imagesx($im)/2-ImageFontWidth(4)*strlen($str)/2;
//ImageString($im, 4,$x,1, $str , $darkred);
$font="/usr/java/j2re1.4.2_04/lib/fonts/LucidaSansRegular.ttf";
$str=iconv('KOI8-U','UTF-8',$str);
$pos=ImageTTFBBox(10,0,$font,$str);
$x=(imagesx($im)-($pos[2]-$pos[0]))/2;
ImageTTFText($im,10,0,$x,13,$darkred,$font,$str);
...
and so on.

[Darken]

It can be done by rebuilding php.

Since I did not longing for editing php-frontend code, I find out how to replace the default font that used by "ImageString" function. In my case I had to rebuild php package.

So I found suitable font (koi8-c for me) here:

http://www.geocities.com/CapeCanaveral/Lab/5735/1/koi8-extended.html

Generate headers and souce files for GD library:
$ cat koi9x15b.bdf | ./bdftogd FontGiant gdfontg
$ cat koi8x16.bdf | ./bdftogd FontLarge gdfontl
$ cat koi7x14b.bdf | ./bdftogd FontMediumBold gdfontmb
$ cat koi6x13.bdf | ./bdftogd FontSmall gdfonts
$ cat koi5x8.bdf | ./bdftogd FontTiny gdfontt

Edit them to correspond the function export syntax found in original source files, replace, rebuild and reinstall php.

[evgeny elkin]

Is anybody solve this problem with GD in latest zabbix versions? I use KOI8-R encoding, and labels for hosts is not correctly displaying on maps, is there any more elegance method, than recompiling GD? Thanks!

[evgeny elkin]

Solved.

Solve this problem by the easyest way for me - editing frontend code:

In map.php

# add a font for koi8-r
$font="./fonts/cokoi8n.ttf";
#

# and change a code

{
# ImageFilledRectangle($im,
# $x_label-2, $y_label,
# $x_label+ImageFontWidth(2)*strlen($label_line), $y_label+ImageFontHeight(2),
# $white);
ImageFilledRectangle($im, 0, 0, 0, 0, $white);
# ImageString($im, 2, $x_label, $y_label, $label_line,$label_color);

ImageTTFText($im, 8, 0, $x_label, $y_label+,ImageFontHeight(2) $label_color, $font, $label_line);
}

if($info_line!="")
{
# ImageFilledRectangle($im,
# $x_info-2, $y_info,
# $x_info+ImageFontWidth(2)*strlen($info_line), $y_info+ImageFontHeight(2),
# $white);
ImageFilledRectangle($im, 0, 0, 0, 0, $white);
# ImageString($im, 2, $x_info, $y_info, $info_line,$color);

ImageTTFText($im, 8, 0, $x_info, $y_info+ImageFontHeight(2), $color, $font, $info_line);
}

[tekknokrat]

ttf fonts in maps/graphs

i also want to use more elegant ttf font for graphs and maps.
I tried the way suggested above but this gives me no output at all.
I tried with a simple ttf test for checking if my server is setup correctly and this works.

why does this output of "test" not works?

 $font           = './VeranMono.ttf';
...
 $darkred        = ImageColorAllocate($im,150,0,0);
...
       ImageFilledRectangle($im,0,0,$width,$height,$white);

        if(($db_image = get_image_by_imageid($backgroundid)))
        {
                $back = ImageCreateFromString($db_image["image"]);
                ImageCopy($im,$back,0,0,0,0,imagesx($back),imagesy($back));
        }
        else
        {
                $x=imagesx($im)/2-ImageFontWidth(4)*strlen($name)/2;
                # ImageString($im, 4, $x, 1, $name , $darkred);
                ImageTTFText($im, 12, 0, 20, 80, $darkred, $font, "test");

        }