Samsung S5PC100 User Manual page 1282

S5PC100 USER'S MANUAL (REV1.0)
6.3.2 Depth Offset Registers (FGRA)
The offset value o for a polygon is
m means the maximum value of incremental ratio to polygon's depth value. o can have the value of [0, 1] range.
And, r (0x34000001) is a H/W characteristic value related to the usable resolution of the depth buffer. The factor
scales m and the units scales r. The offset value o is applied to depth values of all pixels of a polygon.
RA_DOffEn, R/W, Address = 0x0003_8004
RA_DOffFactor, R/W, Address = 0x0003_8008
RA_DOffUnits, R/W, Address = 0x0003_800C
RA_DOffRIn, R/W, Address = 0x0003_8010
RA_DOffEn
Reserved
DOffEn
RA_DOffFactor
DOffFactor
RA_DOffUnits
DOffUnits
RA_DOffRIn
DOffRIn
o = m * factor + r * units.
Bit
[31:1] Reserved
[0] Depth offset usage control register
0b = Disable
Bit
[31:0] Factor scales the max depth slope of the polygon.
Used to calculate the depth offset value.
Bit
[31:0] Unit scale an implementation dependent constant that relates
to the usable resolution of the depth buffer.
Used to calculate the depth offset value.
Bit
[31:0] An implementation dependent constant that relates to the
usable resolution of the depth buffer.
Used to calculate the depth offset value of a polygon.
Description
1b = Enable
Description
Description
Description
3D-ACCELERATOR
Reset Value
0
0b
Reset Value
0x0
Reset Value
0x0
Reset Value
0x34000001
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