GPU/Commands: Difference between revisions
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| 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 | |||
| Enable stencil test | |||
|- | |||
| 7-4 | |||
| Stencil test function (values same as for alpha and depth tests) | |||
|- | |||
| 15-8 | |||
| Replacement value, used as specified by command 0x0106 | |||
|- | |||
| 23-16 | |||
| Reference value for the stencil test. Note that the test does "reference FUNC value". | |||
|- | |||
| 31-24 | |||
| Mask for the stencil test. | |||
|} | |||
=== Parameter value format for command 0x0106 === | |||
This command controls stencil buffer replacement. | |||
{| class="wikitable" border="1" | |||
! Bit | |||
! Description | |||
|- | |||
| 2-0 | |||
| Action when the stencil test fails | |||
|- | |||
| 6-4 | |||
| Action when the stencil test passes but the depth test fails | |||
|- | |||
| 10-8 | |||
| Action when both stencil test and depth test pass | |||
|} | |||
Action values: | |||
{| class="wikitable" border="1" | |||
! Value | |||
! Final stencil value | |||
|- | |||
| 0 | |||
| destination | |||
|- | |||
| 1 | |||
| destination & ~source | |||
|- | |||
| 2 | |||
| same as 1 | |||
|- | |||
| 3 | |||
| same as 0 | |||
|- | |||
| 4 | |||
| destination | source (although not quite. TODO: investigate this one) | |||
|- | |||
| 5 | |||
| destination ^ source | |||
|- | |||
| 6 | |||
| 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 === | ||