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Fix rendering artifacts at non-standard Windows scaling levels by amanraj069 · Pull Request #20282 · microsoft/terminal

DHowett

Summary of the Pull Request

Fix rendering artifacts that occur when Windows display scaling is set to non-standard values (e.g. 116%). The changes ensure UI elements render consistently across different DPI scaling configurations.

References and Relevant Issues

Closes #20281

Detailed Description of the Pull Request / Additional comments

This PR addresses rendering inconsistencies observed when Windows scaling is configured to values other than the commonly used 125%.

The fix adjusts the scaling/rendering logic to properly handle non-standard DPI values, preventing visual artifacts such as:

  • Incorrectly rendered tab underlines
  • UI control rendering inconsistencies
  • Visual glitches caused by scaling rounding errors

Validation Steps Performed

  • Tested with Windows scaling set to 116%
  • Verified that rendering artifacts are no longer visible
  • Verified that tab bar rendering appears correct
  • Verified that window controls render correctly
  • Confirmed no regressions at standard scaling levels (100%, 125%)

PR Checklist