User's Manual

Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0
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13.21. GFXRENDERSTATE_FOG_COLOR
The GFXRENDERSTATE_FOG_COLOR state instruction format is:
DWord Bit Description
0 31:29 Client : 03h – Render Processor
28:24 3DState24NP (Non-pipelined) : 15h
23:19 Fog Color Red : Bits 7:3 of the red fog color component. The default value is 0.
(unsigned int)
18:16 Reserved : 0h
15:10 Fog Color Green : Bits 7:2 of the green fog color component. The default value is 0.
(unsigned int)
9:8 Reserved : 0h
7:3 Fog Color Blue : Bits 7:3 of the blue fog color component. The default value is 0.
(unsigned int)
2:0 Reserved : 0h
13.22. GFXRENDERSTATE_DRAWING_RECTANGLE_INFO
The values programmed in this packet are in screen coordinates. In full screen mode, the screen pitch and
height minus one need to be programmed into this packet. For example, for screen size of 1280x1024,
the values programmed should be Xmin=0, Ymin=0, Xmax=1279, Ymax=1023. When rendering
rectangle primitives, the height or width of the drawing rectangle must be greater than 1
(e.g., (Xmax - Xmin) > 1 and (Ymax - Ymin) > 1).
The drawing rectangle coordinates need to be clipped to the screen boundary by software before send
down to hardware.