Intel 815 manual Gfxrenderstatecolorfactor, Instruction 1h

Models: 815

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Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

R

DWord

Bit

 

Description

 

 

 

0

4:0

Alpha Operation: Valid values are :

 

 

00h

= Reserved

 

 

(Enable/Disable of stage is programmed in the Color Operation field)

 

 

01h

= Select Arg1

 

 

02h

= Select Arg2

 

 

03h

= Modulate

 

 

04h

= Modulate and Multiply by 2

 

 

05h

= Modulate and Multiply by 4

 

 

06h

= Add

 

 

07h

= Add Signed

 

 

08h

= Linearly Blend using the Iterated Alpha as the Blend Term

 

 

09h

= Reserved

 

 

0Ah = Linearly Blend using the Alpha Factor as the Blend Term

 

 

0Bh = Reserved (Linearly Blend when a pre-multiplied map alpha is present)

 

 

0Ch = Reserved (Pre-modulate)

 

 

0Ch = Reserved (Bump/Environment Map)

 

 

0Dh = Reserved (Bump pre-modulate with luminance channel)

 

 

0Fh = Reserved

 

 

10h

= Linearly Blend using Texel0’s Alpha as the Blend Term

 

 

11h

= Linearly Blend using Texel1’s Alpha as the Blend Term

 

 

12h–1Fh = Reserved

 

 

 

 

13.14.GFXRENDERSTATE_COLOR_FACTOR

This instruction specifies a constant color factor, which can be used in the blending stages.

DWord

Bit

Description

 

 

 

0

31:29

Client : 03h – Rendering Engine

 

 

 

 

28:24

3DStateMW : 1Dh

 

 

 

 

23:16

Instruction : 1h

 

 

 

 

15:0

DWORD_LENGTH : 0

 

 

 

1

31:0

Color Factor: This is a 32 bit value in ARGB 8888 format. The top 8 bits used by the

 

 

alpha blending stage and the lower 24 bits used by the color blending stage.

 

 

 

232

Page 232
Image 232
Intel 815 manual Gfxrenderstatecolorfactor, Instruction 1h