r500/regs/gb_select.txt

26 lines
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Field Name Bits Default Description
FOG_SELECT 2:0 0x0 Specifies source for outgoing (GA to SU) fog value.
POSSIBLE VALUES:
00 - Select C0A
01 - Select C1A
02 - Select C2A
03 - Select C3A
04 - Select 1/(1/W)
05 - Select Z
DEPTH_SELECT 3 0x0 Specifies source for outgoing (GA/SU & SU/RAS) depth
value.
POSSIBLE VALUES:
00 - Select Z
01 - Select 1/(1/W)
W_SELECT 4 0x0 Specifies source for outgoing (1/W) value, used to
disable perspective correct colors/textures.
POSSIBLE VALUES:
00 - Select (1/W)
01 - Select 1.0
FOG_STUFF_ENABLE 5 0x0 Controls enabling of fog stuffing into texture coordinate.
POSSIBLE VALUES:
00 - Disable fog texture stuffing
01 - Enable fog texture stuffing
FOG_STUFF_TEX 9:6 0x0 Controls which texture gets fog value
FOG_STUFF_COMP 11:10 0x0 Controls which component of texture gets fog value