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Indic Fonts display - UPP [message #58438]

Fri, 20 May 2022 15:13

deep
Messages: 281
Registered: July 2011
Location: Bangalore

Experienced Member

I need Indian scripts display in applications created using UPP.

To display Indian fonts HarfBuzz usage is required.

All Indian scripts are very complex. All these complexcities are handled by HarfBuzz.

We have conjuncts (joined glyph ) some times with up to 5 chars and multi tier. Some char sequences are interchanged for display.

Steps required for Display India String.

Load and init font with HarfBuzz functions
Shape the string with HarfBuzz function. This gives correct glyph sequence
Get array of Glyph index for the processed string
Display string using glyph index to get glyph from font file.

I have modified the TextToSvgPath example to display the Indic fonts.
I am attaching code in next message along with font files.

Looking for hints how to use HarfBuzz pre-processing generically for UPP display.

index.php?t=getfile&id=6593&private=0

Attachment: UPP_Devanagari_Display.png
(Size: 117.86KB, Downloaded 698 times)

Warm Regards

Deepak

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Re: Indic Fonts display - UPP [message #58439 is a reply to message #58438]

Fri, 20 May 2022 15:16

deep
Messages: 281
Registered: July 2011
Location: Bangalore

Experienced Member

File with code and fonts along with info of modification done to files in uppsrc/Draw folder.

Attachment: TextToSVGPath-HarfBuzz.tar.gz
(Size: 1.65MB, Downloaded 308 times)

Warm Regards

Deepak

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Re: Indic Fonts display - UPP [message #58450 is a reply to message #58439]

Mon, 23 May 2022 16:44

mirek
Messages: 14291
Registered: November 2005

Ultimate Member

This is really helpful as composition is one thing that is missing.

This solves the problem in Linux. Could you try or suggest how to integrate harfbuzz in windows?

I think plugin/harfbuzz should possible; alternatively it might be possible to ship static library maybe with our win32 release?

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Re: Indic Fonts display - UPP [message #58454 is a reply to message #58450]

Tue, 24 May 2022 09:08

deep
Messages: 281
Registered: July 2011
Location: Bangalore

Experienced Member

Mirek,

I will check it for windows also. Within week.

Warm Regards

Deepak

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