register
0
0
V2
absent
GFX
absent
or match
+
x
x
1-α
x
+
x
x
1-α
x
GFXGlobalα
register
V1
absent
Background
color register
Alpha blender
Color
key
GFX
RGB
GFX
α
V2
RGB
V2
α
V1
RGB
dss-165
V2Globalα
DISPC_VID2_ATTRIBUTES[28]
PREMULTIPLYALPHA
DISPC_GFX_ATTRIBUTES[28]
PREMULTIPLYALPHA
Public Version
www.ti.com
Display Subsystem Functional Description
Figure 7-82. Alpha Blending Macro Architecture with Pre-multiplied Alpha Support
NOTE:
"1-alpha" operator corresponds to the basic 1's complement operation.
The pre-multiplied alpha option is accessible through DSS.
[28]
PREMULTIPLYALPHA and DSS.
[28] PREMULTIPLYALPHA registers bits.
The following settings are available:
1651
SWPU177N – December 2009 – Revised November 2010
Display Subsystem
Copyright © 2009–2010, Texas Instruments Incorporated