[Scummvm-tracker] [ScummVM :: Bugs] #17154: SDL3: cursor displays without transparency

[ScummVM :: Bugs]

#17154: SDL3: cursor displays without transparency
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Reporter:  mistydemeo  |      Owner:  (none)
    Type:  defect      |     Status:  new
Priority:  normal      |  Component:  Graphics
 Version:              |   Keywords:
    Game:              |
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 Using SDL3, I'm seeing cursors rendered without transparency; the place
 that's intended to be transparent instead just displays as pure black,
 occluding the game content. This is not specific to any particular game,
 and occurs with the old-style ScummVM GUI with the SCUMM-style "plus"
 cursor too.

 This seems to be specific to indexed-colour cursors; I'm seeing it for
 pure black and white cursors, such as the Mac-style cursors in Director
 games and the SCUMM-style cursor in the old-style ScummVM GUI theme, but
 not with the 24-bit colour cursor used by the modern ScummVM themes.

 I'm using macOS 15.7.9 and SDL3 3.4.14. I tested with latest git HEAD
 (fe716957a7e7e98606778645999625028304ab02), but haven't been able to
 determine when this was introduced; it occurs many months back. I've
 attached screenshots.

 I haven't been able to test on any other OSs to confirm if this happens
 there too or if this is a Mac-only bug.
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Ticket URL: <https://bugs.scummvm.org/ticket/17154>
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