AMD Geode LX [email protected] User Manual
Page 253
AMD Geode™ LX Processors Data Book
253
Graphics Processor
33234H
A over B
1
1-
α
Α
Display image A on top of image
B. Wherever image A is transpar-
ent, display image B.
000
10
A in B
α
B
0
Use image B to mask image A.
Wherever image B is non-trans-
parent, display image A.
001
00
B held out by
A
0
1-
α
A
Use image A to mask image B.
Wherever image A is transpar-
ent, display image B.
000
01
A stop B
α
B
1-
α
A
Use image B to mask image A.
Display A if both images are non-
transparent, otherwise display B.
001
000
00
10
A xor B
1-
α
B
1-
α
A
Display images only where they
do not overlap.
001
000
01
10
darken A
α
R
0
Multiply RGB channels of image
A by specified value.
(Use enables to apply to RGB.)
010
00
opaque A
α
R
0
Multiply
α channel of image A by
a specified value.
(Use enables to apply to alpha.)
010
00
fade A
α
R
0
Multiply all channels of image A
by a specified value.
010
00
fade A
plus
fade B
α
R
1−α
R
Blend images A and B using
α
R
to
specify percentage of A and B in
the resulting image.
010
11
A plus B
1
1
Add images A and B.
010 (
α = 0)
10
Table 6-27. Alpha Blending Modes (Continued)
Operation
Diagram
F
A
F
B
Description
AS Bits
OS Bits