Preliminary
2D
S3C2451X
RISC MICROPROCESSOR
19-8
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
ROTATION
The pixels can be rotated around the reference point (ox, oy) by 90/180/270 degree clockwise or perform a X-
axis/Y-axis flip around the horizontal or vertical line on which (ox, oy) lies. The effects of all rotation options are
summarized in the following table and illustrated in Figure 19-8.
Related Registers
ROT_OC_REG
Coordinate of the rotation reference point
ROTATE_REG
Rotation mode configuration
Rotation Effect
0° 90°
180°
270°
X-flip
Y-flip
x
dcx
-dcy + (ox+oy)
-dcx + 2ox
dcy + (ox-oy)
dcx
-dcx + 2ox
y
dcy
dcx - (ox-oy)
-dcy + 2oy
-dcx + (ox+oy)
-dcy + 2oy
dcy
Original image
X-axis flip
90°
270°
Y-axis flip
180°
FIMG-2D
FIM
G
-2D
FI
M
G
-2D
Figure 19-8. Rotation Example