The %PANGO_GLYPH_INVALID_INPUT macro represents a #PangoGlyph value that has a
special meaning of invalid input. #PangoLayout produces one such glyph
per invalid input UTF-8 byte and such a glyph is rendered as a crossed
box.
Note that this value is defined such that it has the %PANGO_GLYPH_UNKNOWN_FLAG
on.
The %PANGO_GLYPH_INVALID_INPUT macro represents a #PangoGlyph value that has a special meaning of invalid input. #PangoLayout produces one such glyph per invalid input UTF-8 byte and such a glyph is rendered as a crossed box.
Note that this value is defined such that it has the %PANGO_GLYPH_UNKNOWN_FLAG on.