User's Manual

Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0
R
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Figure 21. Results of Example Pattern Fill BLT
b_blt21.vs
d
Scan Lines 128 Through 191
128, 128
Note: Drawing is not to scale
(0, 0)
(0, 767)
(1023, 0)
(1023, 767)
191, 128
63
0
128, 128
20080h
20088h
20090h
20098h
200A0h
200A8h
200B0h
200B8h
On
128th
Scan
Line
(191, 128)
(128, 191)
2FC80h
2FC88h
2FC90h
2FC98h
2FCA0h
2FCA8h
2FCB0h
2FCB8h
On
191th
Scan
Line
(191, 191)
128, 191 191, 191
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.