SptShiftRotate()
… visits
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.
|
Parameter |
Description |
|
bBuffer |
Working buffer to be modified. |
|
bXdirection |
Horizontal shift direction: |
|
wColumnsOut |
Number of columns to rotate. |
|
bYdirection |
Vertical shift direction: |
|
wRowsOut |
Number of rows to rotate. |
|
Value |
Meaning |
|
0 |
Success |
|
1 |
Invalid buffer |
|
2 |
Number of columns exceeds buffer width |
|
3 |
Number of rows exceeds buffer height |
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