libretro / libretro/ps2

[ParaLLEl-GS] Incorrect aspect ratio for certain games with no-interlacing patch applied

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Dominant language
C++
Stars
85
Forks
26
Avg merge
6h 43m
Merged PRs (30d)
6

Description

The core requests 1.067 AR instead of 1.333 when loading God Hand or Virtua Fighter 4 Evo with no-interlacing patches applied. Did not happen in 1.22.2 stable LRPS2 snapshot. This can be mitigated by toggling no-interlace offset from off to on and vice versa, however, regardless of its setting, the game always starts in 1.067 from cold boot.

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Research direction

Reproduce a cold boot of God Hand or Virtua Fighter 4 Evo with the no-interlacing patch applied, and compare the requested aspect ratio with the no-interlace offset toggled. Then trace the core's no-interlacing patch and aspect-ratio handling; done means both games start at 1.333 regardless of the offset setting.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
computer-graphics
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Active
Clarity
Mostly clear
Newbie friendliness
48/100

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