libretro / libretro/libretro-uae

Image Distortion in High-Resolution Mode on Kang Fu

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Dominant language
C
Stars
169
Forks
76
Avg merge
5h 34m
Merged PRs (30d)
7

Description

Some scenes in Kang Fu (using high-resolution mode) exhibit image distortion.
For example, the GREED logo scene and the title screen.
The most noticeable issue is the distortion of displayed text strings.
Line Mode is set to Auto.
I tried both options for Remove Interlace Artifacts, but there was no change.
Remove Interlace Artifacts=Disable
Image
Image

Remove Interlace Artifacts=Enable
Image
Image

For reference, I've attached a screenshot of the same scene captured in WinUAE 6.0.1.
(Line Mode is Double, Interlaced Line Mode is Double Field)
Image
Image

The display on the actual hardware is similar to how it appears in WinUAE.
Is a fix possible?

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Research direction

Reproduce the Kang Fu high-resolution scenes, especially the GREED logo and title screen, using the reported Line Mode and Remove Interlace Artifacts settings. Compare the output with the attached WinUAE and hardware references, then trace the high-resolution display-rendering path; done means the displayed text and images no longer show the reported distortion.

Written by the indexing model from the issue text.

Assessment

Tech stack
c
Domain
computer-graphics
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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