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Mosaic + Background rotation does not match hardware #1691

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Mosaic + Background rotation does not match hardware#1691
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hardware:2DIssues in the 2D/pixel pipeline subsystemplatform:GBAGame Boy Advance-related issues
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mGBA 0.9.1

Description

@felixjones
felixjones
opened on Mar 14, 2020

Rom Download
2020-03-14.zip

Video clip of ROM on hardware
IMG_20200314_174009_MP.zip

At the bottom right of the below screenshot where the background has been rotated the mosaic effect is not applied to the rotation - so the edge of the background is smoother than on actual hardware.

mGBA 0.8.0 and 0.8.1 (software renderer)
rom-0

Notice how the bottom right pixels are much more blocky on hardware
vlcsnap-2020-03-14-17h56m49s315

Activity

  1. endrift
    added
    hardware:2DIssues in the 2D/pixel pipeline subsystem
    platform:GBAGame Boy Advance-related issues
    on Aug 14, 2020
  2. endrift
    added this to the mGBA 0.9.1 milestone on Mar 21, 2021
  3. endrift
    closed this as completedin be8b95fon Apr 2, 2021
  4. endrift
    added a commit that references this issue on Apr 13, 2021

    GBA Video: Fix mode 3-5 overflow with mosaic (fixes #1691)

    91cfbbf
  5. Eijebong
    added a commit that references this issue on Jan 28, 2024

    GBA Video: Fix mode 3-5 overflow with mosaic (fixes mgba-emu#1691)

    be8b95f
  6. zenaror
    added a commit that references this issue on Sep 9, 2026

    GBA Video: Fix mode 3-5 overflow with mosaic (fixes mgba-emu#1691)

    fcbd6e1
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