Roku HD1000 Manual page 12

SET_ZOOM_AND_PAN Takes three
arguments: zoom,
X pan and Y pan.
They must be given
IN THAT ORDER if
they are provided,
but all three
are not required.
Command should look
like "SET_ZOOM_AND_
PAN zoom=0.5 panX=-
75 panY=85". Note
no spaces between
label and argument,
with a single space
between arguments.
Sets the absolute
pan and zoom for
the current image.
The X pan values
are constrained
to values valid
for the hardware
scaler. Pan
coordinates are
given in terms
of the original
decoded image, and
refer to the center
point. Thus, the
pan coordinates
given at left pan
the image so that
its center is
75 source pixels
left of the screen
center and 85
source pixels down
from the screen
center. Zoom is
a floating-point
number that can
be thought of
as magnification
(1.0 is "actual
size", 2.0 is
"double size").
Again, these
are constrained
to valid values
for the hardware
scaler.
[Limitation: if the
image is too large
to fit into the
hardware scaler,
it is scaled to fit.
In this case, all
of the parameters
listed here are
scaled as well.]
Roku External Control Protocol for the HD1000
© 2003 Roku, LLC
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