Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0

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Figure 21. Results of Example Pattern Fill BLT

 

63

128, 128

0

 

 

 

 

 

(0, 0)

(1023, 0)

 

 

128, 128

191, 128

 

 

 

Scan Lines 128 Through 191

 

 

 

 

(191, 128)

 

128, 191

191, 191

(128, 191)

 

 

 

Note: Drawing is not to scale

 

 

(0, 767)

(1023, 767)

 

 

 

 

(191, 191)

 

20080h

20088h

20090h On

20098h 128th

200A0h Scan

200A8h Line 200B0h 200B8h

2FC80h

2FC88h

2FC90h On 2FC98h 191th 2FCA0h Scan

2FCA8h Line 2FCB0h 2FCB8h

b_blt21.vsd

The figure above shows the end result of performing this BLT operation. The 8x8 pattern has been repeatedly copied (“tiled”) into the entire 64x64 area at the destination.

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Image 65
Intel 815 manual Results of Example Pattern Fill BLT