Font Rendering: Inconsistent Kerning and Tracking between Offline and Runtime Rasterized Fonts
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- C#
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Description
Release Type: Official Release 4.2
Version: 4.2.0.2067 on .NET 8.0.2
Platform(s): Windows 11, in Editor and in-Game
Describe the bug
Runtime and Offline rasterized fonts have different tracking.
Offline rasterized vetical tracking is very random (Clown Font effect).
Both have kerning issues.
To Reproduce
Steps to reproduce the behavior:
- download Bai Jamjuree font from Google Fonts
- create Offline Rasterized font
- create Runtime Rasterized font
- create two text blocks, one for each font, same text
- place text blocks on top or beside each other
- observe the fonts deviate significantly
Expected behavior
Consistent layouting and spacing (with in reason) between the fonts.
Screenshots
Cyan is Runtime, Yellow is Offline.
Related to #2172 #2171 #2173
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Reproduce the issue with the Bai Jamjuree font on Windows 11 using the listed Offline Rasterized and Runtime Rasterized steps, then compare identical text blocks. Done means the two rasterization paths produce consistent layout, tracking, vertical spacing, and kerning within a reasonable range.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- csharp
- Domain
- computer-graphics
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100