[vim/vim] Fix DirectWrite glyph pixel spillover leaving artifacts (PR #19711)
mattn
When using DirectWrite rendering, glyph pixels rendered by anti-aliasing can extend beyond cell boundaries. When adjacent cells are later redrawn without the overflowing cell being redrawn at the same time, the spillover pixels remain on screen as visual artifacts.
This is reproducible with plugins that rapidly create and destroy popup windows with opacity: 0 (e.g., cursor animation plugins), but the root cause is general to DirectWrite rendering.
GDI rendering does not exhibit this issue. The artifacts can be cleared with CTRL-L (full screen redraw).
The fix clips DirectWrite text rendering to the cell rectangle by setting ETO_CLIPPED, matching the existing behavior already used for cursor drawing.
You can view, comment on, or merge this pull request online at:
https://github.com/vim/vim/pull/19711
Commit Summary
- 5d8c3d1 Fix DirectWrite glyph pixel spillover leaving artifacts
File Changes
(1 file)
- M src/gui_w32.c (10)
Patch Links:
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Christian Brabandt
chrisbra left a comment (vim/vim#19711)thanks
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Christian Brabandt
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