Details
-
Bug
-
Resolution: Done
-
P2: Important
-
6.2.4
-
macOS 12
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macOS
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cdd7163c60 (qt/qtbase/dev) cdd7163c60 (qt/tqtc-qtbase/dev)
Description
The text is drawn corrupted in certain circumstance.
It appears the problem occurs when:
- QTextDocument based text
- The font is styled as bold
- The font has no explicit bold typeface installed (for example Geneva)
- The painter drawing the font is scaled smaller (less than 1.0 scale)
- macOS (Windows is fine)
Here's part of code
QTextDocument doc;
{
QTextCursor cursor(&doc);
QTextCharFormat qtf;
QFont myFont("Geneva");
myFont.setPixelSize(200);
myFont.setStyleStrategy(QFont::NoAntiali
qtf.setForeground(QColor(0, 0, 0));
myFont.setBold(true);
qtf.setFont(myFont);
cursor.insertText("Bold Geneva\n", qtf);
....
}
QImage pic(600, 400, QImage::Format_ARGB32_Premultiplied);
pic.fill(QColor(255, 255, 255));
{
// approx 100% size
QPainter painter(&pic);
painter.translate(0, 50);
painter.scale(0.25, 0.25);
doc.drawContents(&painter);
}
pic.save("/Users/qtsupport/test_scaled.png");
How to reproduce
1. Use attached project qtbug103215.zip
2. Modify the file path to your own in main.cpp
pic.save("/Users/qtsupport/test_scaled.png");
3. Build and run the application
4. Open the created "test_scaled.png"
Result
If the font has no installed bold typeface, it may not expect bold to appear perfectly.
However, it should not draw corrupted.
Attachments
| For Gerrit Dashboard: QTBUG-103215 | ||||||
|---|---|---|---|---|---|---|
| # | Subject | Branch | Project | Status | CR | V |
| 439248,3 | macOS: Fix synthetic bold on scaled painters | dev | qt/qtbase | Status: MERGED | +2 | 0 |