Samsung S5PC110 Manual page 1776

S5PC110_UM
13.4.3 CLIPPING
Clipping discards the pixels (after rotation) outside the clipping window. The discarded pixels will not go through
the rest of rendering pipelines.
Note that the clipping windows must reside totally inside the screen. Setting the clipping window the same size
with the screen will disable the clipping effect, and a clipping window bigger than the screen size is not allowed.
13.4.3.1.1 Related Registers
BITBLT_COMMAND_REG
CW_LT_REG
CW_RB_REG
13.4.4 COLOR KEY
The Color Key conditionally discards a pixel based on the outcome of a comparison between the color value of
this pixel of the source/destination image and the DR(min)/DR(max) values. If each field (R, G, B, A) of the color
value falls in the range of [ DR(min), DR(max)], this pixel is passed to the next stage; otherwise, discarded. User
can disable the stencil test on a specific field by clearing the corresponding bits in COLORKEY_CNTL.
13.4.4.1.1 Related Registers
SRC_COLORKEY_CTRL_REG
SRC_COLORKEY_DR_MIN_REG
SRC_COLORKEY_DR_MAX_REG
DST_COLORKEY_CTRL_REG
DST_COLORKEY_DR_MIN_REG
DST_COLORKEY_DR_MAX_REG
Enable/disable Clipping Window (CWEn Field)
Coordinate of the leftmost topmost point of the clipping window
Coordinate of the rightmost bottommost point of the clipping window
Source Stencil Test configurations, such as enable/disable the test and
so on.
Set the source DR(min) value for each field
Set the source DR(max) value for each field
Destination Stencil Test configurations, such as enable/disable the test
and so on.
Set the DR(min) value for each field
Set the DR(max) value for each field
13 12BG2D
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