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Display Driver
The following errors have been noted during testing of this software release:
•
In 4096 color mode, the standard Paintbrush application from the Accessories
Program Group does not work correctly. This application does work correctly
at all other pixel depths.
•
The HCT GDI and GDI w/clip fail at 4096 color mode. This is believed to be
due to a limitation in the conformance tests.
OpenGL
•
The depth clear conformance test will fail unless the environment variable
GLINT_DONT_USE_FCP is set to TRUE, or the corresponding box in the
control panel applet is checked. The problem is with the readback of the Depth
Buffer, not its clearing. If this variable is set then this disables the use of ASUS
proprietary fast clear mechanism that allows the depth(Z) buffer to be cleared
up to 16 times more quickly than normal. Typically this becomes significant
for animation rates of 10Hz or higher in large windows.
•
The conformance tests that involve mip-map texture filtering (miplin.c, mipsel.c
and texbc.c) will fail on 500 TX if the DisableMipMap check box in the con-
trol panel applet is set. The default state is to have this set because this pro-
vides the best trade-off between image quality and performance for the major-
ity of applications.
•
When using the glaux library supplied by Microsoft, specifying that you re-
quire alpha planes in the visual is not satisfied by requesting a visual type of
AUX_RGBA
auxInitDisplayMode(type). In these instances the hardware accelerated visual
that will be returned in some modes may not have alpha planes. This is be-
cause the display driver exports visuals without alpha planes before those that
do. This problem can be resolved in two ways: Firstly, if you have the source
code, then when specifying the visual type you can OR in AUX_ALPHA,
along with AUX_RGB (for Example auxInitDisplayMode(AUX_RGB |
AUX_ALPHA)). Secondly, if source is not available, the following registry
variable can be set to 1, which enables the visuals with alpha planes to be
selected first.
in:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\glint\Device0
Setting this variable will result in a decrease in the performance of some appli-
cations as the driver must perform additional setup calculations for ASUS 3DP-
V500TX to cater for the Alpha value as well as R, G, and B.
18
V. RESTRICTIONS
as
opposed
3DExtensions.ExportAlpha
ASUS 3DP-V500TX
to
AUX_RGB
when
calling
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