=> R0 = ID word (chosen by application)
R1 = pointer to rectangle to print
R2 = pointer to transformation table
R3 = pointer to plot position
R4 = background colour (&BBGGRR00)
This SWI is used to specify a rectangle to be printed. The value in R0 is passed back whenever the application is requested to plot any part of this rectangle. If it is called with overlapping rectangles then PDriver_GetRectangle will return these rectangles in the same order. The values in R2 and R3 give the transformation from the application's coordinates to the coordinates of the printed page. (It appears that PDriver implicitly converts from OS units to millipoints as needed.)
See PRM 3, page 623.
Printer transformation tables
This 4 word block is just the first 4 words of a standard 'Draw' transformation matrix.
Printer plot position
This block gives the position on the page of the bottom left corner of the specified rectange.
Offset Contents
0 x coord of bottom left
4 y coord of bottom left
Both values are in millipoints.
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