[Scummvm-tracker] [ScummVM :: Bugs] #15770: EMI: OpenGL shaders: Texture-less characters on GeForce 6600

[ScummVM :: Bugs]

#15770: EMI: OpenGL shaders: Texture-less characters on GeForce 6600
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Reporter:  dwatteau                   |      Owner:  (none)
    Type:  defect                     |     Status:  new
Priority:  normal                     |  Component:  Engine: Grim
 Version:                             |   Keywords:
    Game:  Escape from Monkey Island  |
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 ScummVM 2.10.0git (commit c19577d10da5ebcba14cd0bd8899b8ffd77734ef) on
 big-endian OSXPPC.

 This is on a Quad G5 with an NVIDIA GeForce 6600 GPU.

 On OSX 10.4, shaders aren't available, so the game works fine by default.
 (I'm just using default rendering settings.)

 On OSX 10.5, OpenGL 2.0 is available on that card, and so OpenGL shaders
 are used by default for EMI (for lightning reasons, it seems).

 But there, the characters just become texture-less (see attached
 screenshot).

 Switching back to OpenGL without shaders, or to TinyGL, doesn't show this
 issue. Grim Fandango is fine as well (probably because only EMI tries to
 use OpenGL shaders by default, quickly looking at the code?).
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Ticket URL: <https://bugs.scummvm.org/ticket/15770>
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