https://bugs.kde.org/show_bug.cgi?id=472791
Bug ID: 472791
Summary: Unable to pick correct pixel size of BDF bitmap font
Classification: Applications
Product: krita
Version: git master (please specify the git hash!)
Platform: Microsoft Windows
OS: Microsoft Windows
Status: REPORTED
Severity: normal
Priority: NOR
Component: Tool/Text
Assignee: krita-bugs-n...@kde.org
Reporter: al...@alvinhc.com
CC: griffinval...@gmail.com
Target Milestone: ---
SUMMARY
Bitmap fonts in BDF format comes in separate files per font size. When using
fontconfig to select font files in KoFontRegistry::facesForCSSValues, the code
is unable to pick the correct font file for the specified font size.
STEPS TO REPRODUCE
1. Install "WenQuanYi Bitmap Song" from
https://sourceforge.net/projects/wqy/files/wqy-bitmapfont/1.0.0-RC1/ (on
Windows, extract BDF files into `%LocalAppData%\Microsoft\Windows\Fonts`)
2. Create a file at 72 ppi, switch to 100% or 200% zoom
3. Create a text shape with the following SVG:
```svg
<text style="fill:#000000; letter-spacing:0; font-family:WenQuanYi Bitmap Song;
font-size:12; stroke-width:0"><tspan x="0">佔位文字 Testing
</tspan><tspan x="0" dy="20" style="font-style:italic;">佔位文字
Testing</tspan></text>
```
4. Save the text and observe the result
5. Change font-size to 16
6 Save the text and observe the result
OBSERVED RESULT
At font-size 12, the two lines of text incorrectly use different font sizes:
first line uses 9pt (12px); second line uses 10pt (13px).
At font-size 16, the two lines still use the same font size as before.
EXPECTED RESULT
Font-size 12 should be using 9pt (12px) `wenquanyi_9pt.bdf`.
Font-size 16 should be using 12pt (16px) `wenquanyi_12pt.bdf`.
SOFTWARE/OS VERSIONS
Windows: 10
Base commit is 57d5a2c958
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