Bridgetek FT801 - Figure 12: STENCIL_OP Constants Definition; Stencil_Op

FT800 Series Programmer Guide
Version 2.1
Document Reference No.: BRT_000030 Clearance No.: BRT#037
138
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4.40 STENCIL_OP
Set stencil test actions
Encoding
31 24
23 6
5 3
2 0
0x0C
reserved
sfail
spass
Parameters
sfail
Specifies the action to take when the stencil test fails, one of KEEP, ZERO,
REPLACE, INCR, DECR, and INVERT. The initial value is KEEP (1)
spass
Specifies the action to take when the stencil test passes, one of the same
constants as sfail. The initial value is KEEP (1)
NAME VALUE
ZERO 0
KEEP 1
REPLACE 2
INCR 3
DECR 4
INVERT 5
Figure 12: STENCIL_OP constants definition
Description
The stencil operation specifies how the stencil buffer is updated. The operation
selected depends on whether the stencil test passes or not.