[xep-support] Problem displaying italic arabic characters

[Alexander Peshkov]

Hello Pierre,

ArialMT Italic and ArialMT BoldItalic have no glyphs for Arabic
characters at all. It turns out to be a limitation of this font.
Apart from this you hit a bug in XEP: since there are no glyphs used
in the font being subset (e.g. in Arial-ItalicMT) our subsetting
algorithm produces empty GLYF table for this font in the resulting
document - that's the cause of the error message you see in the
Acrobat. Thanks for drawing our attention for this problem. 

Best regards,
Alexander Peshkov                             mailto:peshkov at renderx.com
RenderX


PD> Hello,

PD> I'm evaluating XEP at this time to use it in a Cocoon web application. I 
PD> face a problem displaying arabic characters with italic style. I joined 
PD> a minimal fo sample and the associated screenshot.
PD> As you can see on the screenshot, arabic characters are not displayed 
PD> properly when using italic or bold-italic style.

PD> As I open the generated PDF file with Acrobat reader, I got an error 
PD> message saying: "Can't extract embedded font: GFEDCB+Arial+ItalicMT. 
PD> Some characters won't be properly printed or displayed", and another one 
PD> "A substitute font can't be found" (messages translated from french by me).

PD> To embed fonts, I uncomment the section relative to Arial font in 
PD> $XEP_HOME/etc/fonts.xml :
PD>     <font name="ArialMT"
PD>           ttf="C:\WINDOWS\Fonts\arial.ttf"
PD>           embed="true">
PD>       <alias name="Arial"/>
PD>     </font>
PD>     <font name="Arial-BoldMT"
PD>           ttf="C:\WINDOWS\Fonts\arialbd.ttf"
PD>           embed="true">
PD>       <alias name="Arial-Bold"/>
PD>       <alias name="ArialMT-Bold"/>
PD>     </font>
PD>     <font name="Arial-ItalicMT"
PD>           ttf="C:\WINDOWS\Fonts\ariali.ttf"
PD>           embed="true">
PD>       <alias name="Arial-Italic"/>
PD>       <alias name="ArialMT-Italic"/>
PD>     </font>
PD>     <font name="Arial-BoldItalicMT"
PD>           ttf="C:\WINDOWS\Fonts\arialbi.ttf"
PD>           embed="true">
PD>       <alias name="Arial-BoldItalic"/>
PD>       <alias name="ArialMT-BoldItalic"/>
PD>     </font>

PD> Any help appreciated.

PD> Pierre
PD> N.B.: I use XEP v3.8.1 Developer Stamped Edition on WinXP Pro with SUN 
PD> JRE 1.4.2_01.


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