SAMA5D43_14 Datasheet, PDF (658/1776 Pages) ATMEL Corporation – Atmel | SMART ARM-based Embedded MPU

32.6.10 Color Combine Unit
32.6.10.1 Window Overlay
The LCD module provides hardware support for multiple “overlay plane” that can be used to display windows on
top of the image without destroying the image located below. The overlay image can use any color depth. Using
the overlay alleviates the need to re-render the occluded portion of the image. When pixels are combined together
through the alpha blending unit, a new color is created. This new pixel is called an iterated pixel and is passed to
the next blending stage. Then, this pixel may be combined again with another pixel. The VIDPRI bit located in the
LCDC_HEOCFG12 register configures the video priority algorithm used to display the layers. When the VIDPRI bit
is cleared, the OVR1 layer is located above the HEO layer. When the VIDPRI bit is set, OVR1 is located below the
HEO layer.
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SAMA5D4 Series [DATASHEET]
Atmel-11238A-ATARM-SAMA5D4-Datasheet_30-Sep-14