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Merge latest fixes from current release. - #419

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JimBobSquarePants merged 3 commits into
mainfrom
release/3.1.x
Sep 11, 2026
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Merge latest fixes from current release.#419
JimBobSquarePants merged 3 commits into
mainfrom
release/3.1.x

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@JimBobSquarePants

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Prerequisites

  • I have written a descriptive pull-request title
  • I have verified that there are no overlapping pull-requests open
  • I have verified that I am following matches the existing coding patterns and practice as demonstrated in the repository. These follow strict Stylecop rules 👮.
  • I have provided test coverage for my change (where applicable)

Description

…PU edge accuracy

- CalcArc and stroke_calc_arc take their vertex count from the guarded
  GetArcSubdivisionCount and stroke_arc_subdivision_count used by round caps.
- StrokeOptions.ArcDetailScale rejects values not greater than zero.
- DefaultRasterizer: band boundary X is interpolated from the segment
  endpoint and rounded to nearest, coverage uses the exact doubled area,
  and the DDA walkers round row and column boundaries to nearest.
- Tests: ArcDetailScale validation, subdivision count monotonicity, and
  CPU/GPU parity theories for round joins at scales 0.01 to 16.
- Reference images updated for the corrected edge coverage.
Round join tessellation and CPU edge accuracy
@codecov

codecov Bot commented Sep 11, 2026

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Codecov Report

❌ Patch coverage is 96.77419% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 80%. Comparing base (61bd770) to head (9b612ed).
⚠️ Report is 3 commits behind head on main.

Files with missing lines Patch % Lines
...ng/Processing/Backends/DefaultRasterizer.Stroke.cs 87% 0 Missing and 1 partial ⚠️
Additional details and impacted files
@@          Coverage Diff          @@
##            main    #419   +/-   ##
=====================================
  Coverage     79%     80%           
=====================================
  Files        232     232           
  Lines      27356   27359    +3     
  Branches    3113    3114    +1     
=====================================
+ Hits       21875   21896   +21     
+ Misses      4589    4576   -13     
+ Partials     892     887    -5     
Flag Coverage Δ
unittests 80% <96%> (+<1%) ⬆️

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@JimBobSquarePants
JimBobSquarePants merged commit 2ffa7d3 into main Sep 11, 2026
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