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1,329 bytes added ,  21:58, 24 October 2014
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Line 209: Line 209:  
| u32
 
| u32
 
| glAlphaFunc()
 
| glAlphaFunc()
 +
|-
 +
| 0x0105
 +
| u32
 +
| Stencil test settings
 +
|-
 +
| 0x0106
 +
| u32
 +
| Stencil replacement operators
 
|-
 
|-
 
| 0x0107
 
| 0x0107
Line 1,212: Line 1,220:  
| GL_OR_INVERTED
 
| GL_OR_INVERTED
 
|}
 
|}
 +
 +
=== Parameter value format for command 0x0105 ===
 +
This command controls stencil testing.
 +
{| class="wikitable" border="1"
 +
!  Bit
 +
!  Description
 +
|-
 +
| 0
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| Enable stencil test
 +
|-
 +
| 7-4
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| Stencil test function (values same as for alpha and depth tests)
 +
|-
 +
| 15-8
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| Replacement value, used as specified by command 0x0106
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|-
 +
| 23-16
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| Reference value for the stencil test. Note that the test does "reference FUNC value".
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|-
 +
| 31-24
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| Mask for the stencil test.
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|}
 +
 +
=== Parameter value format for command 0x0106 ===
 +
This command controls stencil buffer replacement.
 +
{| class="wikitable" border="1"
 +
!  Bit
 +
!  Description
 +
|-
 +
| 2-0
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| Action when the stencil test fails
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|-
 +
| 6-4
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| Action when the stencil test passes but the depth test fails
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|-
 +
| 10-8
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| Action when both stencil test and depth test pass
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|}
 +
 +
Action values:
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{| class="wikitable" border="1"
 +
!  Value
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!  Final stencil value
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|-
 +
| 0
 +
| destination
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|-
 +
| 1
 +
| destination & ~source
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|-
 +
| 2
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| same as 1
 +
|-
 +
| 3
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| same as 0
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|-
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| 4
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| destination | source (although not quite. TODO: investigate this one)
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|-
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| 5
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| destination ^ source
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|-
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| 6
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| same as 0
 +
|-
 +
| 7
 +
| same as 4
 +
|}
 +
'destination' is the value present in the stencil buffer, 'source' is the replacement value specified in command 0x0105.
    
=== Parameter structure for command 0x004D ===
 
=== Parameter structure for command 0x004D ===
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