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[WIP] GS/HW: Initial work implementing RT in RT support #11461

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NOTE THIS IS HEAVY WIP, THIS IS NOT READY FOR CONSUMPTION, BUILDS ARE ONLY HERE FOR TESTING PURPOSES

Description of Changes

Adds support for render target inside render target draws and shuffles

Rationale behind Changes

We didn't support this and a bunch of games do it.

Suggested Testing Steps

Test games which had "top left corner" bugs or weird half screen problems.

Known to fix:
Hitman Blood Money
Swat Global Strike Team split screen
Jak X split screen
Suikoden 3 black and white scene with half screen problem
Big Mutha Truckers

Improves but doesn't currently fix:
Hitman Contracts (still slightly broken)
Stolen (mostly, we have depth precision issues breaking the last bit)
Pachipara
Raw Danger
Steambot Chronicles

Note: This is gated behind Tex in RT and will break some games if left on, be it on your own head!

@TheTechnician27
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Fixes #11417.

@JordanTheToaster
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Fixes #10982

@someother1n
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Fixes #1339 (comment)

Master:
mstr

PR:
PR

@refractionpcsx2
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Thanks for checking, I actually have a preliminary "fixes" list, which is as follows

Big Mutha Truckers - No longer requires a CRC hack for half screen shuffle
Death by Degrees - lighting and fog effects post processing (top left corner) are fixed (CRC can be removed)
Driv3r - Doesn't need such a cacophony of fixes, just CSBW 4/2 + Tex in RT
Hitman Blood Money - Post processing and shadows fixed (still needs CRC for weird corner uploading thing, but may be more fixable these days)
Hitman Contracts - Graphics completely fixed
Jak X - Player 2 now visible
King_Kong_Peter_Jacksons - The Official Game of the Movie - pretty much fixed with rt in rt
Knights of the temple - now needs tex in rt
Manhunt 2 - Post Process (top left corner) lighting fixed
Onimusha - Warlords - fmvs seem to not flicker (game currently uses SW FMV)
Sniper Elite - Second player lighting overlay fixed
Stolen - All graphics processing is fixed, lighting, etc. Speed is also not terrible
Spiderwick Chronicles - Half screen problem in book fixed
Suikoden III - Half screen black and white effect fixed
SWAT - Global Strike Team - Player 2 colours corrected
Taiko no Tatsujin Bang Tap - Lighting overlay (top left corner) fixed
Tekken 5 - Fire effect can now be used upscaled and half screen fire effect problem is fixed
TOCA Race Driver 2 - shadows fixed
Time Crisis 3 - Post processing looks correct now
Tomb Raider - Legends - Fixes for post lighting effects not covering the screen in some levels and goggles
Wrath Unleashed - Fixes colours
WRC 3 - Half screen fog effect fixed.

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4 participants