MICROTRONIX DX-2200, User Manual

Page: 30 / 103

DX-2200
– SD/HD-SDI Text & Graphics Inserter – User Manual
Page 30 of 103
4.8.1.9.7 L
INE
C
OLOR AND
T
RANSPARENCY
Each Graphic Field has a Line Color specified by Red, Green, and Blue Components in the range from 0 to
255. The Line Color is used for solid rectangles, for the outline of open rectangles, for corner markers, target
markers, and the foreground of text.
The colors are entered as three Serial Commands by sending a Red, Green and Blue Serial Command. For
example: sending G1R220, G1G025 and G1B250 sets Text Field 1 to purple.
The default color is white (R255, G255, and B255). Changing the text color does not automatically update
the video output.
The Line Color has a transparency property that can be controlled using the G1Aaaa command to set the
alpha value for mixing with underlying layers. Setting the alpha value to 0 sets the Line Color to be fully
visible and no content on lower video layers will be visible through the Line Color. An alpha of 255 sets the
Line Color fully transparent. At this setting the color will be completely invisible.
For example: sending G1A192 makes Field 1 approximately 75% transparent. Changing the text
transparency does not automatically update the video output.
4.8.1.9.8 B
ACKGROUND
C
OLOR
A
ND
T
RANSPARENCY
Each Field has a Background Color that is used for the background of Text Fields and the fill color of
rectangles. Background Color is set in the same way as Line Color, except the commands used as
GnnBRrrr, GnnBGggg, GnnBBbbb, and GnnBAaaa.
The following example commands set the Background Color of Graphic Field 1 to yellow with partial (50%)
visibility: G1BR255, G1BG255, G1BB0, and G1BA128.
The Background Color will only affect those field types that make use of the Background Color.
Figure 12: Sample of transparent text and background
NOTES: When the text is partially transparent, its apparent color will be determined by the text color,
the background color and the visibilities of the text and background.
When a text background is displayed, the total number of color / transparency combinations is limited. Small
changes in the color or transparency parameters of the text or background may not change the appearance