Samsung S5PC100 User Manual page 1316

S5PC100 USER'S MANUAL (REV1.0)
9.2.7 Color Buffer Write Mask Register (PF_CBMSK, R/W, Address = 0X0007_0024)
PF_CBMSK
Reserved
FbColorWrMask
9.2.8 Depth/Stencil Buffer Write Mask Register (PF_DBMSK, R/W, Address = 0X0007_0028)
PF_DBMSK
Back_FbStencilW [31:24]
rMask
Front_FbStencil [23:16]
WrMask
Reserved
FbDepthWrMask
Bit
[31:4] Reserved
[3:0] This register is used to mask the writing of R, G, B and A values
to the color buffer or buffers. r, g, b, and a indicate whether R,
G, B, or A values, respectively, are written or not. In the Reset
Value, all bits and all color values are enabled for writing.
0000b = all mask disable
0001b = a mask enable
0010b = b mask enable
0100b = g mask enable
1000b = r mask enable
Bit
This register is used for stencil buffer write mask. Especially for
Back side pixel.
The stencil buffer write can be enabled or disabled. In the Reset
Value, the stencil buffer is enabled for writing when stencil test
turns on.
Stencil buffer is consist of 8-bit per pixel, so each bit of this
register can mask each value of stencil buffer
For example,
00000000b, in this case
All 8bits are updated to stencil buffer.
00000001b, in this case
All 8bits are updated to stencil buffer except lsb 1 bit.
00000011b, in this case
All 8bits are updated to stencil buffer except lsb 2 bit.
This register is used for stencil buffer write mask. Especially for
Front side pixel
The stencil buffer write can be enabled or disabled. In the Reset
Value, the stencil buffer is enabled for writing when stencil test
turns on.
Stencil buffer is consist of 8-bit per pixel, so each bit of this
register can mask each value of stencil buffer
[15:1] Reserved
[0] The depth buffer can be enabled or disabled for writing depth
value. In the Reset Value, the depth buffer is enabled for writing.
0b = depth buffer writing
1b = no depth buffer writing
Description
Description
3D-ACCELERATOR
Reset Value
0x0
Reset Value
0x0
0x0
0
0b
9.6-89