Sony PlayStationPortable, Документация

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11 3D GRAPHICS PROCESSING 108
11.5.179 STST
0xdc
4 w STST - Stencil Test
31 24 23 16 15 8 7 0
.... .... .... .... .... .... .... ....
bit(s) description
16-23 Stencil Mask
8-15 Stencil Reference Value
0-2 Stencil Function
000 Never pass stencil test
001 Always pass stencil test
010 Pass test if match
011 Pass test if difference
100 Pass test if less
101 Pass test if less or equal
110 Pass test if greater
111 Pass test if greater or equal
11.5.180 SOP
0xdd
4 w SOP - Stencil Operations
31 24 23 16 15 8 7 0
.... .... .... .... .... .... .... ....
bit(s) description
16-18 Zfail Op
000 Keep stencil value
001 Zero stencil value
010 Replace stencil value
011 Invert stencil value
100 Increment stencil value
101 Decrement stencil value
110
111
8-11 Fail Op
0-3 Pass Op