Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

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13.24.GFXRENDERSTATE_SCISSOR_RECTANGLE_INFO

The coordinate in this instruction packet is relative to the origin (upper left corner, DWord #4) of the drawing rectangle defined in the GFXRENDERSTATE_DRAWING_RECTANGLE_INFO packet. The coordinates of the scissor rectangle do not need to be clipped to screen boundary before sent to hardware.

DWord

Bits

Description

 

 

 

0

31:29

Client : 03h – Rendering Engine

 

 

 

 

28:24

3DStateMWNP (Non-pipelined) : 1Dh

 

 

 

 

23:16

Opcode : 81h

 

 

 

 

15:0

DWORD_LENGTH : 1

 

 

 

1

31:16

Ymin: Y coordinate of upper left corner. Only the lower 10 bits is used by hardware.

 

 

This value is pixel-aligned, U10 format, and reference to the origin (unclipped upper-

 

 

left corner) of the drawing rectangle.

 

 

 

 

15:0

Xmin: X coordinate of upper left corner. Only the lower 11 bits is used by hardware.

 

 

This value is pixel aligned, U11 format, and reference to the origin (unclipped upper-

 

 

left corner) of the drawing rectangle.

 

 

 

2

31:16

Ymax: Y coordinate of lower right corner. Only the lower 10 bits is used by hardware.

 

 

This value is pixel-aligned, U10 format, and reference to the origin (unclipped upper-

 

 

left corner) of the drawing rectangle.

 

 

 

 

15:0

Xmax: X coordinate of lower right corner. Only the lower 11 bits is used by hardware.

 

 

This value is pixel-aligned, U11 format, and reference to the origin (unclipped upper-

 

 

left corner) of the drawing rectangle.

 

 

 

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Intel 815 manual Gfxrenderstatescissorrectangleinfo, Opcode 81h