Details
-
Bug
-
Resolution: Fixed
-
P3: Somewhat important
-
5.15.2
-
None
-
Windows
-
421e7621f (dev), b62b6094d (6.7), e88c2a3b3 (tqtc/lts-6.5)
Description
When HiDPI is on, Qt forces to draw text using QWindowsFontEngineDirectWrite. If the text can be drawn using the glyph cache, QWindowsFontEngineDirectWrite::imageForGlyph() is called to render the glyph. But NoAntialias flag is ignored.
When using GDI font engine (HiDPI is off), NONANTIALIASED_QUALITY is set: https://github.com/qt/qtbase/blob/5.15.2/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase.cpp#L1800-L1801
When using DirectWrite font engine (HiDPI is on), there is no code to turn off antialiasing (DWRITE_RENDERING_MODE_ALIASED?): https://github.com/qt/qtbase/blob/5.15.2/src/platformsupport/fontdatabases/windows/qwindowsfontenginedirectwrite.cpp#L196-L203
This only happens when drawing small texts with the glyph cache.
Attachments
Issue Links
- is duplicated by
-
-
- Closed
-
| For Gerrit Dashboard: QTBUG-97645 | ||||||
|---|---|---|---|---|---|---|
| # | Subject | Branch | Project | Status | CR | V |
| 553535,3 | Implement aliased text rendering with DirectWrite | dev | qt/qtbase | Status: MERGED | +2 | 0 |
| 554263,3 | Implement aliased text rendering with DirectWrite | 6.7 | qt/qtbase | Status: MERGED | +2 | 0 |
| 557412,2 | Implement aliased text rendering with DirectWrite | tqtc/lts-6.5 | qt/tqtc-qtbase | Status: MERGED | +2 | 0 |