SptShiftRotate()

SptShiftRotate(bBuffer As bTftLibParameter1, bXdirection As bTftLibParameter2, wColumnsOut As wTftLibParameter1, bYdirection As bTftLibParameter3, wRowsOut As wTftLibParameter2), Byte

Rotationally shifts (wraps) rows and/or columns within a buffer in the specified directions. Pixels shifted out on one side reappear on the opposite side.

bBuffer – Working buffer to be modified.

bXdirection – Horizontal shift direction:

0 – Shift right

1 – Shift left

wColumnsOut – Number of columns to rotate.

bYdirection – Vertical shift direction:

0 – Shift up

1 – Shift down

wRowsOut – Number of rows to rotate.

Result:

0 – Success

1 – Invalid buffer

2 – Number of columns exceeds buffer width

3 – Number of rows exceeds buffer height

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