Layer Alpha (0x0#00) Register - 5.2 English

Video Mixer LogiCORE IP Product Guide (PG243)

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5.2 English

The Layer Alpha register specifies the per layer alpha blending value used for blending this layer with the underlying layer. The value of this register has a range from 0 which is fully transparent, to 256 which is fully opaque. Layer alpha blending is only supported when the Enable Global Alpha field in the Vivado IDE is enabled for a particular layer. When alpha blending is disabled for a layer, layers are blended as fully opaque on top of the underlying layer.