GS/HW: Improve channel shuffle detection and use on 24bit sources#13794
Merged
lightningterror merged 2 commits intomasterfrom Jan 17, 2026
Merged
GS/HW: Improve channel shuffle detection and use on 24bit sources#13794lightningterror merged 2 commits intomasterfrom
lightningterror merged 2 commits intomasterfrom
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sizable increases to LA RUSH before : 7fps AFTER :80-90FPS BEFORE : |
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Mrlinkwii
approved these changes
Jan 11, 2026
Mrlinkwii
approved these changes
Jan 12, 2026
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LA Rush is significantly faster. 
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JordanTheToaster
approved these changes
Jan 17, 2026
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Description of Changes
Improves lookup of sources when 24 bit targets are involved. Also merges single page targets in to larget targets if they overlap.
Rationale behind Changes
Channel shuffles specifically, always just requested entire targets to have valid information when looking up the source, however in some cases like with MotoGP, the source of the shuffle is a 24bit target, so there is no valid alpha, so the lookup was failing, causing the shuffle to completely fall over. This corrects that by pre-checking what channels the shuffle requires for the read.
Suggested Testing Steps
Test MotoGP, L.A. Rush, but also make sure the Hitman games, The Godfather, Project Snowblind, Midnight Club and Malace are all okay too (they showed up in the dump run, but nothing scary changed).
Did you use AI to help find, test, or implement this issue or feature?
No
Fixes #12569 L.A Rush post processing in stunts
Fixes MotoGP in hardware mode
L.A Rush:
Master:
PR:
MotoGP:
Master (with the new fixes, otherwise completely black):
PR:
