Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

R

15.4.5.3.SHEIGHT—Source Height Register

Memory Address Offset:

 

3Ch (R/W)

 

 

 

 

On-chip Reg. Mem Addr Offset:

3013Ch (RO; debug path)

 

 

 

 

Default Value:

 

00h

 

 

 

 

 

Access:

 

 

 

see address offset above

 

 

 

 

Size:

 

 

 

32 bits

 

 

 

 

 

31

 

26

25

16

15

11

10

0

 

 

 

 

Reserved

UV Source Height

Reserved

 

Y/RGB Source Height

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bit

 

 

 

 

Description

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

31:26

Reserved.

 

 

 

 

 

 

 

 

 

 

 

25:16

UV Source Height. In packed formats this is unused. For planar YUV formats it indicates the number

 

 

 

of lines starting at and including the base address line contained in the UV source data. When the last

 

 

 

line is reached and the complete destination window has not been filled, this line will be repeated until

 

 

 

the end of the destination window.

 

 

 

 

 

 

 

 

A height must not be specified for lines that are not on the active display.

 

 

 

 

 

Minimum height is 2 lines or 4 lines for interlaced surfaces (Bob).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15:12

Reserved.

 

 

 

 

 

 

 

 

 

 

 

10:0

Y/RGB Source Height. In packed formats this indicates the number of lines starting at and including

 

 

 

the base address line contained in the source data. In planar formats, it is the number of Y lines. This

 

 

 

is used to determine where the end of the source is in the vertical direction to handle the edge effects

 

 

 

related to the vertical filter. When the last line is reached and the complete destination window has not

 

 

 

been filled, this line will be repeated until the end of the destination window.

 

 

 

 

 

A height must not be specified for lines that are not on the active display.

 

 

 

 

 

Minimum height is 2 lines or 4 lines for interlaced surfaces (Bob).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Image 284
Intel 815 manual SHEIGHT-Source Height Register