Intel 815 manual Gfxrenderstatemaptexels

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Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

R

13.5.GFXRENDERSTATE_MAP_TEXELS

The Mapping Engine is capable of generating at most two texels per pixel. The texels may be obtained from two separate maps or the same map using different u,v coordinates. The binding between the texels which are generated by the engine and the coordinate set and the map information state is specified with this instruction. The texels are generated in the order specified by the Texel Index. If no texel is enabled, texture mapping is disabled and this is the default condition. If one of the two texels is enabled, one texture coordinate will be used for texture mapping. If both texels are enabled, both texture coordinates will be used for texture mapping.

Figure 31. State Variable Relationships

Coordinate Sets

Texels

Map Information

Blending Stages

DWord

Bit

Description

 

 

 

0

31:29

Client : 03h – Rendering Engine

 

 

 

 

28:24

3DState16 : 1Ch

 

 

 

 

23:19

Opcode : 0h

 

 

 

 

18:16

Reserved: 00h (Additional Texels)

 

 

 

 

15

Texel 1 State Variable Mask : 0 = Do not update; 1 = Update

 

 

 

 

14

Texel 1 Enable :

 

 

0 = Disable (default)

 

 

1 = Enable

 

 

 

 

13:12

Reserved: 00h (Additional Coordinate Sets)

 

 

 

 

11

Texel 1 Coordinate Set Index : Index to the Coordinate Set.

 

10:9

Reserved: 00h (Addition Map Information)

 

 

 

 

8

Texel 1 Map Information Index : Index to the Map Information.

 

7

Texel 0 State Variable Mask : 0 = Do not update; 1 = Update

 

 

 

 

6

Texel 0 Enable :

 

 

0 = Disable (default)

 

 

1 = Enable

 

 

 

 

5:4

Reserved: 00h (Additional Coordinate Sets)

 

3

Texel 0 Coordinate Set Index : Index to the Coordinate Set.

 

 

 

 

2:1

Reserved: 00h (Addition Map Information)

0

0

Texel 0 Map Information Index : Index to the Map Information.

 

 

 

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Intel 815 manual Gfxrenderstatemaptexels