installation and user information

 

optimization

 

Do not add this environment variable to /etc/X11/X0screens. That

WARNING

 

would disable all scaling for everything rendered to the screen.

 

By applying it only to the desired application, you can leave

 

scaling enabled for everything else not inside the immediate

 

mode application’s windows. In short, you should never set this

 

variable so that it is applied to your user or system environment.

 

It MUST be applied specifically to the invocation of applications

 

that require it. A good way to do this is to set it in a script, which

 

invokes the application.

 

gamma correction in pass through mode

 

 

The hp visualization center sv6 supports 3-channel gamma correction

 

(i.e. red, green, and blue can all be controlled individually). However,

 

pass through mode only allows for 1-channel gamma correction. To allow

 

for normal sv6 mode and pass through mode to co-exist, the pass through

 

mode simply uses the sv6's red gamma channel as the pass through

 

gamma correction value for red, green, and blue.

 

pass through mode on a multi-channel sv6

 

A side effect of pass through mode is that an application cannot use the

 

full area of a multi-channel display such as a power-wall. This is because

 

the application is operating exactly as it would on a standard desktop

 

workstation, and so it has no access to the sv6 channels, which are driv-

 

ing other monitors or projectors in the display. The result of this is that

 

an application in pass through mode is constrained to the area of the dis-

 

play handled by the channel driven by the application master worksta-

 

tion. Typically, for a two- or three- channel system, this is the left-most

 

channel. Furthermore, if the display is projected and uses edge-blending

 

technology for a seamless image, the overlap region may prove

 

out-of-bounds too, because the brightness of the application’s window

 

will fall off as it approaches the edge of the channel (because its pixels

 

are not duplicated in the channel next to it). Therefore it may be neces-

 

sary to resize the window a little to ensure that it doesn’t enter the blend

 

region.

 

Note that applications that do not require pass through mode can use

 

any region of the full multi-channel display, and are not affected by pass

 

through applications that may be running at the same time.

Chapter 2

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Image 83
HP manual Invokes the application, Gamma correction in pass through mode, Pass through mode on a multi-channel sv6