Samsung S5PC110 Manual page 1774

S5PC110_UM
13.4.2 ROTATION AND ADDRESSING DIRECTION (FLIP)
The pixels can be rotated by 90 degree clockwise or flipped around X-axis or Y-axis. The flip operation can be
performed by direction of source read and destination read. The effects of rotation and flip options are
summarized in the following table and illustrated in
13.4.2.1.1 Related Registers
ROTATE_REG
SRC_MSK_DIRECT_REG
DST_PAT_DIRECT_REG
13.4.2.1.2 Rotation Effect
13.4.2.1.3 Addressing Direction Effect
Src X Direction = Dst X Direction
Src X Direction ≠ Dst X Direction
Src Y Direction = Dst Y Direction
Src Y Direction ≠ Dst Y Direction
Enable 90 degree rotation
Addressing direction of source/mask memory to read
Addressing direction of destination/pattern memory to read and write
Rotated X = Original X
0°
Rotated Y = Original Y
Rotated X = Original Y
90°
Rotated Y = Original Width - 1 - Original X
Figure 13-3.
No flip over X axis
Horizontal flip
No flip over Y axis
Vertical flip
Effect
13 12BG2D
13-5