Name
playout:GetUnknownGlyphsCount -- get unknown glyphs count
Synopsis
n = playout:GetUnknownGlyphsCount()
Function
Counts the number of unknown glyphs in the layout.

This function can be used to determine if there are any fonts available to render all characters in a certain string, or when used in combination with #PANGO_ATTR_FALLBACK, to check if a certain font supports all the characters in the string.

Inputs
none

Results
n
the number of unknown glyphs in the layout
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