[Scummvm-tracker] [ScummVM] #9607: AGI: Animation and timers too fast with OpenGL backend

[Derek Warren]

#9607: AGI: Animation and timers too fast with OpenGL backend
-----------------------------+----------------------------
Reporter:  dmwarren          |      Owner:
    Type:  defect            |     Status:  new
Priority:  normal            |  Component:  Engine: AGI
Keywords:  cycle, animation  |       Game:  King's Quest 1
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 '''Game'''
 KQ1 AGI from the Roberta Williams Anthology. ScummVM identifies it as
 v2.0F 1987-05-05 5.25"/3.5"/DOS/English

 logdir: 10ad66e2ecbd66951534a50aedcd0128
 vol.0: 9081ab588c09202729cfd224b2f57301
 object: 6eca02fa540337308529ff13e9e764aa

 Also reproducible with Fastest mode in The Black Cauldron (2.00 1987-06-14
 DOS/English), freely available at http://allowe.com/downloads/games.html


 '''Platform'''
 OS X 10.11.6



 '''Problem'''
 Setting the animation speed to "fast" or "fastest" makes the animation run
 at an almost unplayably fast speed.

 Timers run fast as well. (e.g., in KQ1 the fairy dust only lasts ~40
 seconds)

 Was not able to reproduce bug with other graphics backends or other AGI
 titles (KQ2, KQ3, SQ2).



 '''Last commit where bug was not present'''
 778c1ddb69bb45b6992fdc9b8fff6b2c8d3e22ac



 '''First commit where bug is present'''
 34117170f2955e854a93925a652af37575361b44




 '''Steps to Reproduce'''
 1. Grab OS X machine. (haven't tested other platforms)

 2. Load KQ1 (see version info above) or The Black Cauldron with an
 affected version of ScummVM.

 3. Set Graphics mode to OpenGL, either filtered or unfiltered.

 4. Start game. Switch to 'fast' or 'fastest' animation speed.

 5. Move around. If the bug is present, it will take just ~4 seconds to
 cross a screen. Fine movement will be very difficult because you're moving
 too fast. Timers will expire in seconds instead of minutes.

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Ticket URL: <https://bugs.scummvm.org/ticket/9607>
ScummVM <https://bugs.scummvm.org>
ScummVM