When an application uses more colors that the video device can generate,
the device driver (and/or GDI subsystem ?) for line objects (like text)
approximates requested color to the nearest color device can generate or
for solid brushes - simulates requested color by dithering (mixing
colors in a pattern). In common situations the color simulation is a
very useful but sometimes it gives unexpected effects when color of
written text is the same as (or similar to) one of dithered colors of
the background plane. The lowest color depth of the video device the
worse visual effects we get - e.g. for 256 colors video driver for Win
2K Terminal server (based on RDP 5.0 protocol). In such case it could be
very interesting to observe how display quality would improve (if any)
when dithering will be turned off.
But how to disable this function of RDP display driver? Is that any
dedicated registry key which controls dithering? Or perhaps is any other
way to disable dithering?
Thanks in advance
A.