Datasheet

1105
SAM9X35 [DATASHEET]
11055E–ATARM–10-Mar-2014
46.6.11.2 Overlay Blending
The blending function requires two pixels (one iterated from the previous blending stage and one from the current overlay
color) and a set of blending configuration parameters. These parameters define the color operation.
Figure 46-7. Alpha Blender Function
Figure 46-8. Alpha Blender Datapath
iter[n-1] la ovr
GA
OVR
DMA
LAEN
REVALPHA
ITER
ITER2BL
INV
CRKEY
From
Shadow
Registers
GAEN
RGBKEY
RGBMASK
iter[n]
blending
function
OVRDEF
iter[n-1]la ovr
GA
OVR
DMA
LAEN
REVALPHA
ITER
INV
GAEN
iter[n]
OVRDEF
Inverted
"0"
"0"
"0"
CRKEY
iter[n-1]ovr
MATCH
LOGIC
RGBKEY
RGBMASK
ovr
00
00
0
0
0
0
Alpha * ovr + (1 - Alpha) * iter[n-1]