4. Operating
Barco – Eos X Terminal – DOC-3061-2 – user's manual – Revision 11 – November-2004
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4-5
4.2.2
Color capabilities of Eos
Visual classes
For operating your E
OS
you can use the following combinations of visual class and color depth, depending on
which kind of application is to be displayed:
•
DirectColor, 16bit (R: 5bit, G: 6bit, B: 5bit) for displaying video
2
16
= 64K colors can be displayed. Shared and private color cells are available.
•
DirectColor, 32bit (R: 8bit, G: 8bit, B: 8bit) for displaying video
2
24
= 16M colors can be displayed. Shared and private color cells are available.
•
TrueColor, 16bit (R: 5bit, G: 6bit, B: 5bit) for displaying video
2
16
= 64K colors can be displayed. The possible RGB values in the color map are predefined in equidistant
steps. Thus it is guaranteed that the whole spectrum of colors is covered.
•
TrueColor, 32bit (R: 8bit, G: 8bit, B: 8bit) for displaying video
2
24
= 16M colors can be displayed. The possible RGB values in the color map are predefined in equidistant
steps. Thus it is guaranteed that the whole spectrum of colors is covered.
•
PseudoColor, 8bit with NearBy Color Allocation for displaying pure 8 bit applications
2
8
= 256 colors out of 256
3
= 16M can be displayed. Shared and private color cells are available. The maxi-
mum number of shared and private color cells together is 256.
NearBy color allocation
X clients may exit on an allocation of a shared or private color cell, if the color map is already full and the re-
quested color cell is not included in the color map, yet. However, the NearBy Color Allocation guarantees, that
each request for a shared color cell returns a color cell, whether or not the color map is already full or an entry in
the color map matches the request. Please, refer to section
Multi-color-depth
Multi-color-depth
With the multi-color-depth option of the X server two color modes are available for X clients in parallel. The
X server itself runs in 8 bit PseudoColor whereas X clients may also display windows in 16 bit TrueColor. It de-
pends on the ability of the X client whether it automatically starts applications in the optional higher color depth
or if the X client itself needs to be started with an option identifying the color depth. There exist also X clients
that are not able to use the offered higher color depth.
This feature is only available with UGX
G
RAPHIC
C
ARDS
.
OmniScaler
The O
MNI
S
CALER
enables to display video and RGB sources no matter in what color mode and color depth the
X server operates. Thus optimal integration of 8 bit PseudoColor applications with high quality video and RGB
display is possible. If the X server operates in 8 bit PseudoColor mode, the video / RGB window is displayed in
YUV4:2:2 / 16 bit TrueColor mode. Complete correlation between color mode of the X Server and the video/RGB
window is listed in the table below.
Module video
With Module Video the video or RGB signals of the Q
UAD
A
NALOG
V
IDEO
C
ARD
, S
TREAMING
V
IDEO
C
ARD
or D
UAL
RGB
I
NPUT
C
ARD
are displayed without borders and fitted to complete projection modules (1 to n×n, depending on configura-
tion). The same color capabilities apply as with movable and scalable video and RGB windows. Please, refer also
to section
for more details.
