User's Manual

Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0
R
245
13.23. GFXRENDERSTATE_SCISSOR_ENABLE
Only inclusive mode scissoring is supported.
Pixel Aligned
Drawing Window
Pixel Aligned
Clipping Rectangle
Span Aligned Reference
Point Defined by the Back
Buffer Info Packet
“Inclusive”
Cli i
Drawn Region
DWord Bit Description
0 31:29 Client : 03h – Rendering Engine
28:24 3DState16NP (Non-pipelined) : 1Ch
23:19 Opcode : 10h
18:17 Reserved: 00h (For Future Additional Scissor Rectangles)
16 Scissor Rectangle ID : This number must be 0 for this stepping since only one
clipping rectangle is allowed. (More clipping rectangles can be allowed in future
expansion)
15:2 Reserved: 00h
1 Scissor Rectangle Enable Mask : 1 = Update; 0 = Do Not Update
0 0 Scissor Rectangle Enable : 0 = Disable (default), 1 = Enable