   eClass
***********************************
   GUnet eClass 1.4   
  Latex. X  latex,   
"", " "  ""  
       
    .
         
   Linux (Redhat, Debian ..) 
    Latexrender. To Latexrender  
     gif  .
   latexrender   GNU Lesser General Public License.

*************************
  Server
*************************
 Latex, ImageMagick  Ghostscript,    
      GUnet eClass.   
 tetex    latex .     
   package.

************
 
************

A)      eClass config.php.
(.. /var/www/html/eclass/config/config.php)

   

define('latex_picture_path', "/path-to-eclass/modules/latexrender/pictures");
define('latex_picture_path_httpd',"/path-to-eclass/modules/latexrender/pictures");
define('latex_tmp_dir',"/path-to-eclass/modules/latexrender/tmp"); 
define('latex_path',"/usr/bin/latex");
define('dvips_path',"/usr/bin/dvips");
define('convert_path',"/usr/bin/convert");
define('identify_path',"usr/bin/identify");

  path-to-eclass      path  .
      :

define('latex_picture_path', "/var/www/html/eclass/modules/latexrender/pictures");
define('latex_picture_path_httpd',"/var/www/html/eclass/modules/latexrender/pictures");
define('latex_tmp_dir',"/var/www/html/eclass/modules/latexrender/tmp"); //   slash

   path   latex, dvips, 
convert  identify    ,  .

B)    (   eClass)/modules/latexrender.
(.. /var/www/html/eclass/modules/latexrender )

        pictures  tmp. 
        (chmod 777)       
   .

          
 ImageMagick      .   
  background       
class.latexrender.php   "png"  "gif"   
   .

      texbox [tex]  [/tex]. 
 [tex]\sqrt{2}[/tex]     gif  
     2. 

 : 

      (12pt)    
    class.latexrender.php  
: 
var $_font_size = 12;
 :
var $_font_size = 10;

   10pt, 11pt  12pt .

  latex.php      : 

$latex_formula = "\n\n" .$latex_formula; 

          \begin.
       \frac  
  .    :
1.    $latex_formula = "\n\n" .$latex_formula; 
         \begin 
   .
2.   \dfrac   \frac    
  .

:
[tex]\sqrt{2}[/tex]
[tex]\dfrac {1}{2}[/tex]
[tex]\dfrac{\sin x}{x}=1[/tex]
</div>
