Samsung S5PC110 Manual page 1605

S5PC110_UM
9.3 LAYERS
Mixer blends all the image sources such as video layer, graphic layer, and background layer and transfers the
blended pixel data to TVNEC/HDMI. Set layer's priority value to select the order of the blending operation. Video
and 2 graphic layers can be fully ordered and blended. The background layer is always the lowest layer.
• (Video ↔ Graphic0 ↔ Graphic1)
Background
Video layer and graphic layer are enabled or disabled by the register setting. The blending factor differs layer by
layer like following:
•
Background layer: No blending factor, as it is the lowest layer.
•
Video layer: Video layer has one blending factor that is applied to all the pixels in the video layer.
MIXER_VIDEO_CFG [7:0](REG_ALPHA_VID) is the blending factor. The video blending is enabled or
disabled.
•
Graphic0 layer: Graphic0 layer supports pixel blending and window blending. Pixel blending factors are
applied
pixel-by-pixel although window blending factor is applied all the pixels in the graphic layer. These two blending
factors are applied simultaneously to a pixel.
•
Graphic1 layer: Graphic1 layer supports pixel blending and window blending. Pixel blending factors are
applied pixel-by-pixel although window blending factor is applied on all the pixels in the graphic layer. These
two blending factors are applied simultaneously to a pixel.
9 8BMIXER
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