Details
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Bug
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Resolution: Unresolved
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P2: Important
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None
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5.9.2, 5.15
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None
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Windows
Description
Hello,
I'm moving application from Qt 5.9.2 to 5.15.1 and while doing so noticed that fonts look different in 5.15.1.
After testing noticed that fonts in 5.15.1 have different width and height in comparison to 5.9.2
Doing some debugging I see that width is different, here is comparison:
simple test code:
const QString text;
QFontMetricsF(painter.font()).boundingRect(text).width();
ommited bunch of {{qDebug}}s that output this:
| qDebug | 5.9.2 | 5.15.1 |
|---|---|---|
| QT_VERSION | 329986 5.9.2 vs 1900 | 331521 5.15.1 vs: 1928 |
| painter hints | QFlags<QPainter::RenderHint>(TextAntialiasing) | QFlags<QPainter::RenderHint>(TextAntialiasing) |
| painter font | QFont( "Monospaced,12,-1,2,75,0,0,0,0,0" ) | QFont(Monospaced,12,-1,2,75,0,0,0,0,0) |
| textSize | QSizeF(204, 23) | QSizeF(221, 20) |
| QFontMetricsF averageCharWidth | 12 | 13 |
| QFontMetricsF capHeight | 11.8281 | 20 |
| QFontMetricsF descent | 6 | 4 |
| QFontMetricsF fontDpi | NA | 120 |
| QFontMetricsF height | 23 | 20 |
| QFontMetricsF width | 204 | 221 |
| QFontMetricsF horizontalAdvance | NA | 221 |
| QFontMetricsF leading | 0 | 0 |
| QFontMetricsF lineSpacing | 23 | 20 |
| QFontMetricsF lineWidth | 2 | 2 |
| QFontMetricsF overlinePos | 18 | 17 |
What I'm interested in is from where this change in size comes from ?
Seen this old bug: https://bugreports.qt.io/browse/QTBUG-74828 and the answer there is that changes comes from change in HARFBUZZ version. Did this lib was updated between version 5.9 -> 5.15 also ? I tried setting QT_HARFBUZZ=old for both Qt 5.9 and 5.15 but results were same as without that env. variable (width still differed).
Thanks in advance for reply.
Best regards