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Re: [threadx-users] Thai shaping support
  • From: Adrian SKERRATT <askerratt@xxxxxxxxxxx>
  • Date: Fri, 26 Jul 2024 12:51:54 +0000
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  • Thread-topic: [threadx-users] Thai shaping support
Hi all

I found the cause of this issue: it is because the Noto Sans Thai font does not contain the characters in the range 0xF700 to 0xF71A which GUIX Studio needs to do the Thai shaping.

I found that using a font that does contain those characters works correctly in GUIX Studio, as long as the "Include character set defined by String Table" checkbox is enabled in the edit font dialog box.

I used the THSarabunNew font which can be found here

https://github.com/epsilonxe/SIPAFonts

Adrian
From: threadx-users <threadx-users-bounces@xxxxxxxxxxx> on behalf of Adrian SKERRATT via threadx-users <threadx-users@xxxxxxxxxxx>
Sent: 22 July 2024 14:49
To: threadx-users@xxxxxxxxxxx <threadx-users@xxxxxxxxxxx>
Cc: Adrian SKERRATT <askerratt@xxxxxxxxxxx>
Subject: Re: [threadx-users] Thai shaping support
 
Hi All

I'm replying to a query made to this list by Elia Leoni about Thai font shaping in GUIX Studio, but as I subscribed after it was posted, I can't reply directly to or quote that email.

Elia,

In case you hadn't seen it, you can find some documentation on the options in the font dialog on this page

https://github.com/eclipse-threadx/rtos-docs/blob/main/rtos-docs/guix/guix-studio-4.md

From this it seems that you do not need to select "Support Extended Character Range" as this is if you need to use Unicode characters above 0xFFFF

I'm afraid I'm not very familiar with Thai Unicode, so can you explain why you are using the range 0xF700 to 0xF71A as the Thai language Unicode range is 0x0E00 to 0x0E7F?

Although the range 0xF700 to 0xF71A is assigned to function and arrow keys in Unicode, I did find this link:

https://cs.wingarc.com/manual/svf/svf10/en/1156136.html

which seems to be saying that the "Arial Unicode MS" font uses that range for Thai characters, but this range is not present in the Noto Sans Thai font that you are using.

Adrian
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Adrian Skerratt
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