Le 4 mai 09 à 19:23, Grant Erickson a écrit :
While the Displays preference pane doesn't appear to allow it, the
Universal
Access preference pane allows setting all active, online displays to
greyscale mode.
However, when using CGDisplayAvailableModes, the only modes that
appear for
the current display width and height are 8-bit, 16-bit and 32-bit
RGB modes
(3 samples per pixel).
Is there a Cocoa, CoreGraphics or other ApplicationServices API that
handles
this mode selection or does this use an IOKit COM API? Given that
CGDisplayCurrentMode displays 32-bits, 3 samples per pixel even when
Universal Access is putting the displays in greyscale mode seems to
hint at
the latter.
Regards,
Grant
I don't know any public function to do this, but the pref pane uses
theses privates functions:
extern Boolean CGDisplayUsesForceToGray();
extern void CGDisplayForceToGray(Boolean gray);
Fill a feature request if you want them to be public in a futur
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