Turning off Direct Draw acceleration

[lanux128]

is there a way to programmatically toggle DirectDraw Acceleration other than the 'dxdiag' way? i'm looking for a way to temporarily disable DirectDraw Acceleration to trouble-shoot a game, maybe with a few DLL calls. any chance of doing that?

[f0dder]

I don't think it's a good idea doing it programmatically. Sure, sucks having to ask your users to do it manually, but stil...

[lanux128]

what if i put in a really big button that says 'caution' in all caps? actually it's related to my post here where i'm trying to get Grim Fandango to run on my PC without any graphical glitches. disabling hardware acceleration is one way to solve the problem but i loath to toggle manually each time.

[lanux128]

some quick registry comparison showed the these two keys are involved when 'DirectDraw' is turned off from the dxdiag applet (see image). i'm thinking of a batch file or an AHK script that toggles these settings but could anyone could verify this before i inadvertently bork my gfx drivers..

[Select]

HKLM, SOFTWARE\Microsoft\Direct3D\Drivers, SoftwareOnly
HKLM, SOFTWARE\Microsoft\DirectDraw, EmulationOnly