MB86296 Datasheet, PDF (245/352 Pages) Fujitsu Component Limited. – PCI Graphics Controller Specification

FUJITSU LIMITED PRELIMINARY AND CONFIDENTIAL
L0BLD (L0 Blend)
Register
address
DisplayBaseAddress + B4H
Bit number 31 30 29 28 ----- 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Bit field name
Reserved
L0BE L0BS L0BI L0BP Reserved
L0BR
R/W
Initial value
This register specifies the blend parameters for the L0 layer. This register corresponds to BRATIO
or BMODE for previous products.
Bit 7 to 0 L0BR (L0 layer Blend Ratio)
Sets the blend ratio. Basically, the blend ratio is setting value/256.
Bit 13
L0BP (L0 layer Blend Plane)
Specifies that the L5 layer is the blend plane.
0 Value of L0BR used as blend ratio
1 Pixel of L5 layer used as blend ratio
Bit 14
L0BI (L0 layer Blend Increment)
Selects whether or not 1/256 is added when the blend ratio is not “0”.
0 Blend ratio calculated as is
1 1/256 added when blend ratio≠ 0
Bit 15
L0BS (L0 layer Blend Select)
Selects the blend calculation expression.
0 Upper image × Blend ratio + Lower image × (1 – Blend ratio)
1 Upper image × (1 – Blend ratio) + Lower image × Blend ratio
Bit 16
L0BE (L0 layer Blend Enable)
This bit enables blending.
0 Overlay via transparent color
1 Overlay via blending
Before blending, the blend mode must be specified using L0BE, and alpha must also be enabled
for L0 layer display data. For direct color, alpha is specified using the MSB of data; for indirect
color, alpha is specified using the MSB of palette data.
MB86296S <Coral-PA>
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Specification Manual Rev0.1