v3.1.x Fix 2758

[JimBobSquarePants]

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Description

Fixes #2758

I cannot include the images in the tests as I was unable to open a FileExplorer instance containing them without crashing in my Windows 11 instance.

Still not sure what's going on with the provided repo, but I have added the relevant test images and tests.

[antonfirsov]

Looks like it's breaking other gif use-cases?

I plan to also take a look in the weekend and the add test images. For me File Explorer works on Win11 for the folder.

[JimBobSquarePants]

Looks like it's breaking other gif use-cases?

I plan to also take a look in the weekend and the add test images. For me File Explorer works on Win11 for the folder.

@antonfirsov My first attempt was bad as I misunderstood the problem.

I've now refactored the LZW decoder to run row-by-row, so we only allocate enough bytes for a single row rather than the full buffer. In this case this brings down the allocation from 4GB to 64K. This should mean a massive win across the board.