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IV. UTILITIES & DRIVERS
3D Graphics & Double Buffering
The display driver contains an extension to allow 3D applications, and the OpenGL
installable client driver, to drive the hardware. To provide a double buffering capa-
bility for these 3D applications the display driver provides the following features.
A screen-sized off-screen buffer is configured if the "DoubleBuffer.NumberOfBuffers"
registry variable is greater or equal to 2 (see below). This buffer is used in 256,
4096, 32768 and True Color modes to provide BitBlt double buffering. The off-
screen buffer is also used to provide full screen hardware double buffering if an
application window covers the whole screen. For double buffering to be available,
the chosen resolution and pixel depth must fit into 2MB. This restriction applies to
ASUS 3DP-V500TX boards. The resolution tables below define which pixel depth
and resolution combinations provide a double buffering capability.
Resolution and Color Depth Table
# of
Screen
Colors
Resolution
4,096
800x600
4,096
1024x768
4,096
1152x870
32,768
1024x768
32,768
1152X870
32,768
1280x1024
32,768
1600x1200
True
800x600
True
1024x768
True
1152X870
1600x1200 resolutions are available at 60Hz. The rest of the above modes are avail-
able at both 60Hz and 75Hz monitor refresh rates. In addition, the 640x480 resolu-
tion is available at 72Hz. A full list of all modes is available via the display applet
once the driver has been installed and the system rebooted. Choose the list all
Modes" option to get this list.
Currently only double buffered resolutions are selectable using the Display Applet,
unless a registry variable is set to override this (see below). This is to avoid confu-
sion where double buffered applications run through software rendering only be-
cause of insufficient VRAM available to support accelerated double buffering.
# of
Color Space
Buffers
2x Buffering
2
Yes
2
Yes
2
Yes
2
No
2
No
2
No
2
No
2
No
2
No
2
No
ASUS 3DP-V500TX
Blitted
# of H/W 2x
2x Buffering
Buffering Win
Yes
Many
Yes
Many
Yes
Many
Yes
Many
Yes
Many
Yes
Many
Yes
Many
Yes
Many
Yes
Many
Yes
Many
7
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