MICROTRONIX DX-2200, Руководство пользователя

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DX-2200
– SD/HD-SDI Text & Graphics Inserter – User Manual
Page 58 of 103
4.8.1.12 Layer Control SERIAL Commands
The Layer Control SERIAL Commands allow layers to be updated, reduced in size, and moved. These
commands also duplicate some of the capabilities provided in the Text Overlay and Graphics Overlay
commands.
These commands include one or more layer numbers that are represented by 'nnn' in the command
descriptions. It is possible to specify a single layer, two layers, or three layers by combining layer numbers in
the command.
The layers are:
0
– Apply the command to all layers
1
– Graphics Layer 1
2
– Graphics Layer 2
3
– Graphics Layer 3
For example the LnnnU command updates layers:
L1U
– Update layer 1
L12U
– Update Layers 1 and 2
L123U
– Update all Layers (1, 2 and 3)
L0U
– Update all Layers (1, 2 and 3)
NOTE: When specifying layers, do not specify the same layer number more than once, and do not combine
'0' with any other layer number.
4.8.1.12.1 L
OW
L
EVEL
B
UFFER
C
ONTROL
The Layer Control Serial Commands can be used to access the same Low Level Overlay Functions that are
provided in the Text Overlay and Graphic Overlay Commands. In the case of the Graphic Overlay
Commands, it may be more convenient to use these commands because the layer number is included in the
command as a parameter to allow the command to be executed without need of changing the active
graphics layer.
The Low Level Buffer Control Commands are LnnnB, LnnnW, LnnnC, and LnnnS. When nnn is 1, these
commands are equivalent to the SW, SW, SC, and SS commands.
When n is 2 or 3, the commands are equivalent to the GB, GW, GC, and GS commands with the Active
Layer set to n.
4.8.1.12.2 V
ISIBILITY OF
L
AYERS
Individual layers can be enabled and disabled at the mixer. This provides a high speed method of turning a
layer on and off
because the individual fields don’t need to be rendered.
The LnnnD command disables the visibility of a layer, and the LnnnE command enables visibility. The LnnnT
command toggles visibility on and off.
These visibility commands act as a master control to enable or disable the entire layer. The visibility settings
of the individual Fields on the layer are not changed by these commands. By default, all layers are enabled.
NOTE: If these commands are used to disable a layer, then the visibility commands for the individual Fields
on that layer cannot make them visible again. Only the LnE command or resetting the layer to
defaults can make them visible