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GSX-86: Graphics for the APe
OPEN WORKSTATION
The Open Workstation operation causes a graphics device to become the current
device for the application program. The device is initialized with the parameters in
the input array and information about the device is returned to GDOS.
Input
Output
contrl(l)
contrl(2)
contrl(4)
intin
intin( 1)
intin(2)
intin(3)
intin( 4)
intin(5)
intin(6)
intin(7)
intin(8)
intin(9)
intin(10)
contrl(3)
contrl(5)
intout(1)
intout(2)
intout(3)
Opcode = 1
o
Length of intin = 10
Initial defaults
Workstation identifier (i.e. device driver
ID) This value is used to determine which
device driver to dynamically load into
memory.
Linetype
Polyline color index
Marker type
Polymarker color index
Text font
Text color index
Fill interior style
Fill style index
Fill color index
Number of output vertices = 6
Length of intout = 45
Maximum addressable width of screen/
plotter in rasters/steps assuming a 0 start
point (e.g. a resolution of 640 implies an
addressab Ie area of 0-639, so intou t( 1 )= 639).
Maximum addressable height of screen/
plotter in rasters/steps assuming a 0 start
point (e.g. a resolution of 480 implies an
addressable area of 0-479, so intout(2)=479).
Device Coordinate units flag
0= Device capable of prod ucing precisely
scaled image (typically plotters and
printers)
1 = Device not capable of precisely scaled
image (CRTs)
9-13
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