Alpha Blending

Zynq UltraScale+ Device Technical Reference Manual (UG1085)

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2.4 English

Video Blending is defined for two RGB video streams. One of these streams will be graphics that have an alpha value along with RGB stream. The alpha value available with the graphics stream will define the transparency of the graphics. Alpha value defined for blending function is always 8-bit. 1-bit alpha and 4-bit alpha are also supported, but these are scaled to 8-bits before they are used for alpha blending.