Eskil Abrahamsen Blomfeldt fccd419dd6 Remove false Q_UNREACHABLE from shaping code ... This was added by 9ff76c27b9 on the basis that it signifies a shaping error and would later assert or crash. But the line is easily reachable by user code. If Harfbuzz returns 0 glyphs, it just means it is unable to shape the string, for instance if the input string only contains default ignorables (like a ZWJ) and does not have any appropriate glyph to use for replacement. Qt expects there to always be at least one glyph in the output (num_glyphs == 0 is used to indicate shaping is not yet done), so to avoid asserts later on, we simply populate the output with a single 0 token, which is a required entry in the font that is reserved for representing unrepresentable characters. This also adds a test and therefore a zero-width joiner to the test font to reproduce the issue. [ChangeLog][QtGui][Text] Fixed a possible crash with certain fonts when shaping strings consisting only of control characters. Fixes: QTBUG-89155 Pick-to: 5.15 Pick-to: 6.0 Change-Id: Ia0dd6a04844c9be90dcab6c464bebe339a3dab11 Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>		2021-02-03 09:44:44 +01:00
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test.ttf	Remove false Q_UNREACHABLE from shaping code	2021-02-03 09:44:44 +01:00
testfont_condensed.ttf	Make self-contained test of condensed font matching and width	2016-10-16 00:11:13 +00:00
testfont_italic.ttf	Read font selection flags and use them when querying for metrics	2018-11-30 16:15:03 +00:00
testfont_open.otf	QWindowsFontDatabase: Check preferred family names for all fonts	2019-11-29 09:31:21 +01:00
testfont.ttf	Fix kerned advances in QRawFont on OS X and Windows	2015-11-25 19:53:46 +00:00