[Scummvm-tracker] [ScummVM :: Bugs] #10986: Asset override

[ScummVM :: Bugs]

#10986: Asset override
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Reporter:  Laserschwert  |      Owner:  (none)
    Type:  enhancement   |     Status:  new
Priority:  normal        |  Component:  Common
Keywords:                |       Game:
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 Lately there have been several projects regarding cleanup and upscaling of
 video game assets (like textures or background images) using AI-driven
 tools like ESRGAN. For 3D games it's quite easy to swap out existing
 textures in a game for new versions of the same files. For adventure games
 I think ScummVM would be the best tool to allow for this functionality.

 What I'm imagining is basically being able to place override files in the
 game's directory (or an override subdirectory), and the game automatically
 uses any override files it finds I there, instead of the one from the
 game's data files. This doesn't necessarily only apply to image files, as
 it might also be nice to be able to replace for example audio files.

 Getting the format of an override file right might be the tricky part
 (like palettized images), so ideally this should work independently from
 the original asset's format.

 Example 1: I've used ESRGAN to remove all the dithering from the CoMI
 background images. Of course after that they aren't 8-bit color images
 with an indexed palette anymore (which caused/required the dithering in
 the first place). So rendering these at their now 24-bit color range would
 be required.

 Example 2: After removing the dithering I've scaled the backgrounds up to
 4x their original size (again using ESRGAN, so quality-wise it's much
 better than what a realtime scaler could produce). Being able to use those
 upscaled backgrounds instead of their 640x480-sized originals would
 require them to be scaled to fit the game window. Would the OpenGL
 renderer be able to do this, while keeping all other assets and game
 functionality (like walk boxes) the same?

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Ticket URL: <https://bugs.scummvm.org/ticket/10986>
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