Fixes red, green and blue lines artifact on AMD GPUs in Luigi's Mansion 3.
This removes the old global legacy rescaling toggle.
Instead it automatically detects the specific fragment shaders causing the issue (due to F32/U32 bitcasts on position attributes).
The legacy rescaling workaround is now applied exclusively to these broken shaders, keeping the default scaling math intact for everything else.
This PR introduces an optional Legacy Rescale Compatibility Mode that restores the previous rescale‑pass behavior for titles that rely on its quirks. While the new rescale logic is generally more correct, some games exhibit visual issues that the legacy behavior incidentally avoids.
Enabling this mode can mitigate line artifacts on AMD GPUs and reduce grey‑texture flickering on Nvidia GPUs in Luigi’s Mansion 3. This is a compatibility workaround rather than a full fix, and should only be used for titles affected by these rare edge‑case rendering problems.
Original Logic from MaranBR
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3582
Co-authored-by: John <john@eden-emu.dev>
Co-committed-by: John <john@eden-emu.dev>
This formats all copyright comments according to SPDX formatting guidelines.
Additionally, this resolves the remaining GPLv2 only licensed files by relicensing them to GPLv2.0-or-later.
ImageFetch offsets for 2D array coordinates have a different composite size than the coordinates. The rescaling pass was not taking this into account.
Fixes broken shaders when scaling is enabled in Astral Chain, and likely other titles.
