Opened 2 years ago

Closed 5 months ago

#308 closed defect (wontfix)

Glyph substutition does not work for certain character sets.

Reported by: Alex Taylor Owned by:
Priority: major Milestone:
Component: General Version: 4.7.3
Severity: low Keywords:


In principle, when rendering Unicode text, characters that are not supported by the current font will be substituted from a font which does support them. (Whether Qt4 does this via fontconfig or something else I'm not certain.)

This does work for many languages, including Cyrillic, Hebrew and Greek. However, it does not work with some other languages, in particular Japanese and Chinese: all relevant characters are rendered with the font's .notdef glyph.

Consequently, when reading text that includes such languages, it is necessary to set the font explicitly to one which supports those languages. Unfortunately, not all applications allow this (especially web browsers which use page-defined fonts).

You can easily see this by opening a page like in the Arora browser. The list of languages down the left-hand side shows several with substituted characters (specifically: Georgian, Korean, Japanese and Chinese).

Change History (2)

comment:1 Changed 5 months ago by Silvan Scherrer

Milestone: Qt Enhanced

Ticket retargeted after milestone closed

comment:2 Changed 5 months ago by Silvan Scherrer

Resolution: wontfix
Status: newclosed

please retest with Qt 5 later on and open a ticket at if it's still wrong.

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