IBM Power GXT800P, Installation And User Manual

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Chapter 6. Software Application Considerations
This chapter discusses operating system tasks related to the POWER GXT800P
graphics adapter.
Starting the Server in Overlay and Color Planes
The X server can create windows in a separate set of frame buffer planes called
overlays. The X server supports this by defining distinct visuals for the overlay and
color planes.
The -layer n parameter for xinit gives the system the ability to select the hardware
frame buffer planes in which to run the X server. A value of:
0 indicates the color plane.
1 indicates the overlay plane (default).
These are the only valid choices. All other choices will default to layer 1.
Starting the X server in the color planes
xinit -- -layer ð
<
other flags
>
Starting the X server in the overlay planes
xinit -- -layer 1
<
other flags
>
or
xinit --
<
other flags
>
API Required Parameters
Following are xinit options that take advantage of 3D hardware capabilities. These
options are required to run the 3D application programming interfaces (APIs).
API for PEX:
Starting the X server for the PEX API requires an additional
parameter
-x pex
. For example:
xinit -- -x mbx -x abx -x pex
<
other flags
>
API for OpenGL:
Starting the X server for the OpenGL API requires an additional
parameter
-x GLX
. For example:
xinit -- -x dbe -x abx -x GLX
<
other flags
>
Chapter 6. Software Application Considerations
6-1