Samsung S3C2451X User Manual page 428

2D
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
ROTATE_REG
0°
x dcx
y dcy
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.
19-8
Coordinate of the rotation reference point
Rotation mode configuration
90°
-dcy + (ox+oy)
dcx - (ox-oy)
Original image
FIMG-2D
270°
Figure 19-8. Rotation Example
Rotation Effect
180°
-dcx + 2ox dcy + (ox-oy)
-dcy + 2oy -dcx + (ox+oy)
90°
X-axis flip
S3C2451X RISC MICROPROCESSOR
270° X-flip
dcx
-dcy + 2oy
180°
Y-axis flip
Y-flip
-dcx + 2ox
dcy