[Scummvm-tracker] [ScummVM :: Bugs] #13169: Myst III Exile: missing scene transition effect on PowerPC (big-endian) machines under AmigaOS4

[ScummVM :: Bugs]

#13169: Myst III Exile: missing scene transition effect on PowerPC (big-endian)
machines under AmigaOS4
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Reporter:  kas1e          |      Owner:  (none)
    Type:  defect         |     Status:  new
Priority:  normal         |  Component:  Engine: Myst3
 Version:                 |   Keywords:  big endian, BE, Myst3, AmigaOS
    Game:  Myst 3: Exile  |
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 While testing AmigaOS4 builds of ScummVM (v2.5.0 and daily build from
 25.12.2021) find out a rendering issue.

 the issue is that switch between scenes in Myst3 does not have that nice
 transition effect when one scene is replaced by another one. instead, we
 have or just a white screen for a time while the transition effect should
 happen or a bit of visual trash (depends on the drivers we use).

 if we use an older version of our drivers called MiniGL  we have such a
 visuall mess:

 https://youtu.be/ndhmxNXlLH4?t=78

 if watch carefully between switching of scenes then instead of effect we
 have some purple vertical lines all over the screen for a time of effect.

 And that if I use another more modern OpenGL driver called GL4ES:

 https://youtu.be/KiDJ3ox51lU?t=37

 There all visibly better. just instead of a color mess, we have a white
 screen for the time while the effect should happen and then a new scene
 happens.

 When I test the same version of the game but on win32/x64 then all fine
 means it's probably a Big-Endian issue.

 if you need any more details or tests just ask :)

 Thanks!
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Ticket URL: <https://bugs.scummvm.org/ticket/13169>
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