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DCL:GRPH1:SWPACK: Machine-Dependent Routines:Explanation of Subroutines: Inquiry Routines

7.7.4 SWSROT

1.

Function

Changes the direction of rotation of a screen.

2.

Call

CALL SWSROT(IWTROT)

3.

Explanation of Arguments

IWTROT

(I)

Upright when 1; rotated 90 degrees when 2. (i)

4.

Notes

(a)

Normally, the SWPACK is not concerned with the direction in which a graphics is drawn in a higher routine. However, when performing hard fill, the relationship between the directions of the graphics and the device becomes essential, so this routine inquires the information. Therefore, only the HARD FILL routine used this information.