68
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Line 2:
Line 2: + Line 25:
Line 26: − + + + + Line 4,992:
Line 4,996: − + − + + + + Line 5,036:
Line 5,043: − + + + + + + + − + − + − + Line 5,104:
Line 5,117: − + Line 5,118:
Line 5,131: − + Line 5,132:
Line 5,145: − + Line 5,163:
Line 5,176: − + − + − + − + Line 5,702:
Line 5,715: − + Line 5,724:
Line 5,737: − + + + Line 6,448:
Line 6,463: + + + − + + + + + + + + + + + + + + + + + + + +
→Command Header: Size field is 8-bit, not 11-bit (tested on hardware)
== Overview ==
== Overview ==
GPU internal registers are written to through GPU commands. They are used to control the GPU's behavior, that is to say tell it to draw stuff and how we want it drawn.
GPU internal registers are written to through GPU commands. They are used to control the GPU's behavior, that is to say tell it to draw stuff and how we want it drawn.
| Parameter mask
| Parameter mask
|-
|-
| 20-30
| 20-27
| Number of extra parameters (may be zero)
| Number of extra parameters (may be zero)
|-
| 28-30
| Unused
|-
|-
| 31
| 31
| unsigned, Minification filter
| unsigned, Minification filter
|-
|-
| 3-10
| 3-6
| 0x60
| Min LOD (usually 0)
|-
| 7-10
| Max LOD (usually 6)
|-
|-
| 11-18
| 11-18
|-
|-
| 0-7
| 0-7
| unsigned, Texture offset
| unsigned, Texture offset (Mipmap level 0 / base level)
|-
| 8-15
| unsigned, mipmap level 1 offset (usually 0x80)
|-
| 16-23
| unsigned, mipmap level 2 offset (usually 0xC0)
|-
|-
| 8-31
| 24-31
| 0xE0C080
| unsigned, mipmap level 3 offset (usually 0xE0)
|}
|}
This register is used to set the procedural texture unit's offset.
This register is used to set the procedural texture unit's offset. Mipmap level 4-7 seems to be hardcoded at offset 0xF0, 0xF8, 0xFC and 0xFE .
=== GPUREG_PROCTEX_LUT ===
=== GPUREG_PROCTEX_LUT ===
|-
|-
| 12-23
| 12-23
| fixed1.0.11, Difference from next element
| fixed0.0.12 with two's complement ( [0.5,1.0) mapped to [-1.0,0) ), Difference from next element
|}
|}
|-
|-
| 12-23
| 12-23
| fixed1.0.11, Difference from next element
| fixed0.0.12 with two's complement, Difference from next element
|}
|}
|-
|-
| 12-23
| 12-23
| fixed1.0.11, Difference from next element
| fixed0.0.12 with two's complement, Difference from next element
|}
|}
|-
|-
| 0-7
| 0-7
| fixed1.0.7, Red difference between current and next color table elements
| signed, Half of red difference between current and next color table elements
|-
|-
| 8-15
| 8-15
| fixed1.0.7, Green difference between current and next color table elements
| signed, Half of green difference between current and next color table elements
|-
|-
| 16-23
| 16-23
| fixed1.0.7, Blue difference between current and next color table elements
| signed, Half of blue difference between current and next color table elements
|-
|-
| 24-31
| 24-31
| fixed1.0.7, Alpha difference between current and next color table elements
| signed, Half of alpha difference between current and next color table elements
|}
|}
This register is used to configure the blending function.
This register is used to configure the blending function.
Equation values:
'''Equation values:'''
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|}
|}
Function values:
Blend equations 5, 6, 7 appear to behave the same as blend equation 0 (Add)
'''Function values:'''
{| class="wikitable" border="1"
{| class="wikitable" border="1"
| 0-23
| 0-23
| fixed0.16.8, Depth direction attenuation proportion
| fixed0.16.8, Depth direction attenuation proportion
|-
| 24-25
| unsigned, Depth function
|}
|}
This register is used to configure the gas depth direction attenuation proportion.
This register is used to configure the gas depth direction attenuation proportion, as well as the gas depth function.
Gas depth function values:
{| class="wikitable" border="1"
! Value
! Description
|-
| 0
| Never
|-
| 1
| Always
|-
| 2
| Greater than/Greater than or equal
|-
| 3
| Less than/Less than or equal/Equal/Not equal
|}
=== GPUREG_FRAGOP_SHADOW ===
=== GPUREG_FRAGOP_SHADOW ===