[Scummvm-tracker] [ScummVM :: Bugs] #16316: SCUMM: SAMNMAX: Vanishing sprites when pausing at Mystery Vortex (original bug)

[ScummVM :: Bugs]

#16316: SCUMM: SAMNMAX: Vanishing sprites when pausing at Mystery Vortex (original
bug)
----------------------------+----------------------------
Reporter:  GermanTribun     |       Owner:  (none)
    Type:  feature request  |      Status:  new
Priority:  normal           |   Component:  Engine: SCUMM
 Version:                   |  Resolution:
Keywords:                   |        Game:  Sam and Max
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Description changed by GermanTribun:

Old description:

> This one is an original bug, because I clearly remembered encountering it
> on DOS and aimed at replicating it. I tested it with the German CD
> version.
>
> If you activate the game pause at the outside Mystery Vortex, the four
> floating foreground objects disappear. Also, if Sam and Max stand behind
> those objects when you pause, part of their sprites are cut off as well.
>
> What I guess is going on: The foreground sprites for some reason get into
> conflict with the pause sign (or pause in general) and are earased as
> long as it is present. That the sprites of Sam and Max partially vanish
> as well could be due to them standing behind those sprites and their
> transparancy areas (thus why the cut is a clean line).
>
> Since that is not supposed to happen, perhaps the problem can be fixed?
> Not game breaking, but clearly an original oversight.

New description:

 This one is an original bug, because I clearly remembered encountering it
 on DOS and aimed at replicating it. I tested it with the German CD
 version.

 If you activate the game pause at the outside Mystery Vortex, the four
 floating foreground objects disappear. Also, if Sam and Max stand behind
 those objects when you pause, part of their sprites are cut off as well.

 What I guess is going on: The foreground sprites for some reason get into
 conflict with the pause sign (or pause in general) and are earased as long
 as it is present. That the sprites of Sam and Max partially vanish as well
 could be due to them standing behind those sprites and their transparancy
 areas (thus why the cut is a clean line).

 Since that is not supposed to happen, perhaps the problem can be fixed?
 Not game breaking, but clearly an original oversight.

 EDIT: Some more testing revealed, that the save menu and quit game prompt
 from the original GUI also cause the effect, but not the ones from
 ScummVM. Also, the Lucasarts logo at the start also is affected by the
 behavior, since pausing on that screen with original GUI  blanks it out.

 Seems to be some kind of bigger problem.

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Ticket URL: <https://bugs.scummvm.org/ticket/16316#comment:2>
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