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Opcode
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Description.
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1
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Initialise Workstation. Loads the device driver if necessary and sets
default values.
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2
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Close Workstation. Halts graphics output to this workstation.
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3
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Clear Workstation. This clears the device and is equivalent to CLS if
used on a CRT device.
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4
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Update Workstation. Display all pending graphics.
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5
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Escape. Enable device dependent operation. These deal mainly with
character output if the device has an alpha mode with addressable
character cells. Function 5 is called and an escape sequence ID is passed
to GSX in control(6).
| ID | | Description |
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| 1 | – | Inquire addressable character cells. |
| 2 | – | Enter graphics mode. |
| 3 | – | Exit graphics mode. |
| 4 | – | Alpha cursor up. |
| 5 | – | Alpha cursor down. |
| 6 | – | Alpha cursor right. |
| 7 | – | Alpha cursor left. |
| 8 | – | Home alpha cursor. |
| 9 | – | Erase to end of screen. |
| 10 | – | Erase to end of line. |
| 11 | – | Direct cursor address ( Move to row and column). |
| 12 | – | Output cursor addressable text. |
| 13 | – | Reverse video on. |
| 14 | – | Reverse video off. |
| 15 | – | Inquire current cursor address. |
| 16 | – | Inquire tablet status. ( Is a digitiser connected?) |
| 17 | – | Hard copy. e.g. Dump a graphics screen to printer. |
| 18 | – | Place graphics cursor at location. |
| 19 | – | Remove graphics cursor. This turns the cursor off. |
| 20 | – | 50 Reserved for future expansion. |
| 51 | – | 100 Unused and available. |
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6
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Polyline. Output lines from data in PTSIN array.
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7
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Polymarker. Output markers at positions given in PTSIN. These markers are
typically ( . * O X + ).
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8
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Text. Output text from machine font at specified position.
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9
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Filled area. Display and fill a polygon.
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10
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Cell array. Create a pixel array from colour data given in the INTIN
array and at a position given in PISIN.
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Opcode
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Description.
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11
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Generalised drawing primitive. These routines give you an easy way to
display bars, arcs, pie slices and circles. These are not always fully
implemented.
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12
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Set character height. Not possible of course if the
Pluto
font is used
but should be implemented for plotter device drivers and the suchlike.
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13
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Set character up vector. This allows you to rotate character strings if
the device will allow it.
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14
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Set colour representation. Will allow you to specify the red, green and
blue intensity associated with a colour index. (Presumably this is for
use in
palette
systems.)
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15
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Set linetype. You should be able to choose from solid, dashed, dotted or
dashed=dotted.
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16
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Set line width.
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17
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Set line colour.
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18
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Set marker type.
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19
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Set marker scale.
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20
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Set marker colour.
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21
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Set hardware text font. (Only one to choose from in Pluto.)
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22
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Set text colour.
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23
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Set fill interior style. You should be able to choose from outline only,
solid fill, pattern fill or hatch pattern fill.
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24
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Set fill style index. This allows you to specify the type of pattern or
hatch fill you require from the selection available.
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25
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Set fill colour index, Having chosen the type of fill you require you can
now say what colour you want it done in.
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26
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Inquire colour representation. Returns the RGB intensities of a requested
colour index.
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27
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Inquire cell array. Returns the pixel colour values of the requested
area.
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