Bug 504551 - Vector rasterizer creates half-transparent pixels on vector shapes without gaps whose borders are not on pixel boundaries
Summary: Vector rasterizer creates half-transparent pixels on vector shapes without ga...
Status: REPORTED
Alias: None
Product: krita
Classification: Applications
Component: Layers/Vector (other bugs)
Version First Reported In: 5.2.9
Platform: macOS (DMG) macOS
: NOR normal
Target Milestone: ---
Assignee: Krita Bugs
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2025-05-20 00:00 UTC by Katalin Rebhan
Modified: 2025-05-20 00:01 UTC (History)
0 users

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Latest Commit:
Version Fixed In:
Sentry Crash Report:

Attachments
Example.kra (25.81 KB, application/x-krita)
2025-05-20 00:01 UTC, Katalin Rebhan 		Details
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Description Katalin Rebhan 2025-05-20 00:00:35 UTC 
SUMMARY
Having two vector shapes (e.g. rectangles) next to each other can create transparent pixels between them despite the two shapes being flush next to each other, if the border between them is not on a canvas pixel boundary.

STEPS TO REPRODUCE
1. Create a vector layer with two rectangles next to each other
2. Resize/move the rectangles so that the border between them is not on a pixel boundary

OBSERVED RESULT
The rasterizer outputs half-transparent pixels on the border between the two rectangles

EXPECTED RESULT
The pixel on the borders is colored proportionally according to the percentage the two shapes fill out

SOFTWARE/OS VERSIONS
macOS: 15.5 (24F74)

ADDITIONAL INFORMATION
Comment 1 Katalin Rebhan 2025-05-20 00:01:59 UTC 
Created attachment 181547 [details]
Example.kra

Here's an example file demonstrating the issue. On the right image, which is just a copy of the left image resized, the pink background should not be visible through the white/gray squares, since they do not have a gap between them.