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johnmarsden
Level 7

Accessing characters in Latin Extended Additional? They're boxes right now.

How do you get Latin Extended Additional characters to show up? Even with the system font, they're just showing boxes. For example: "Ḁ ḁ Ḉ Ḍ ḓ ḗ Ḡ Ḳ" 

While all those characters work on the web with fonts like Helvetica, Arial, Gotham, etc... they do not work in Roku firmware 8.0. Is there anything I can do about this?


https://en.wikipedia.org/wiki/Latin_Extended_Additional
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5 Replies

Re: Accessing characters in Latin Extended Additional? They're boxes right now.

Use custom fonts, that can map the characters properly. I used fonts to show Trello icons for example on my "Rokanban for Trello" channel
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johnmarsden
Level 7

Re: Accessing characters in Latin Extended Additional? They're boxes right now.

How do you "map the characters properly"? 

If I'm using Helvetica which is capable of displaying them: Ḁ ḁ Ḉ Ḍ ḓ ḗ Ḡ Ḳ   Then shouldn't that work? I've tested that it works in browsers and stuff with various fonts, but using those same fonts won't show the characters Roku.

I remember back in the Adobe Flash days you could select which glyph sets you wanted to import; but I don't think there's a thing like that for Roku.
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johnmarsden
Level 7

Re: Accessing characters in Latin Extended Additional? They're boxes right now.

Bump.
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Re: Accessing characters in Latin Extended Additional? They're boxes right now.

Ok, let me explain what I did with the Trello font.

As I wanted specific characters defined on the font, I created an object so I could easily access each icon. With regular Unicode (UTF-8) you should not need this approach, but in my case these characters are mapped inside the font, these are not regular Unicode characters.

myIcons = { icons: {
    activity: Chr(&hE900), 
    archive: Chr(&hE905),
             attachments: Chr(&hE906), 
             card: Chr(&hE90F), 
             check: Chr(&hE910),
             checklist: Chr(&hE911), 
             comments: Chr(&hE916),
             description: Chr(&hE917),
             due: Chr(&hE914), 
             edit: Chr(&hE91D),
             label: Chr(&hE930),
             logo: Chr(&hE908), 
             member: Chr(&hE934),
             private: Chr(&hE943),
             public: Chr(&hE944),
             team: Chr(&hE93D)}}


In a Scene Graph XML I defined my custom font this way:
       <Label id="comment" color="#4D4D4D" width="830" wrap="true" lineSpacing="1" maxLines="3" translation="[60,30]">
           <Font role="font" uri="pkg:/fonts/facit-trellicons.ttf" size="28"/>
       </Label>


And finally in my code I just assigned the text this way:
m.comment.text = myIcons.comments + " Comments"


In your case, you can just copy and paste the text in your code. Just make sure the source text file is encoded properly in UTF-8
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Roku Employee
Roku Employee

Re: Accessing characters in Latin Extended Additional? They're boxes right now.

"johnmarsden" wrote:
How do you "map the characters properly"? 

If I'm using Helvetica which is capable of displaying them: Ḁ ḁ Ḉ Ḍ ḓ ḗ Ḡ Ḳ   Then shouldn't that work? I've tested that it works in browsers and stuff with various fonts, but using those same fonts won't show the characters Roku.


You shouldn't have to do anything other than using a font that includes those characters in its repertoire.

Where did you get your Helvetica font file? Have you verified that the .ttf / .otf has glyphs defined at those Unicode code points, and that the string/text you are trying to display has the corresponding Unicode character values?

I did a quick test with some of those characters and they displayed as expected using a Google Noto font.
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