BlendFunc

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Action

Specify pixel arithmetic.

 

 

Syntax

BlendFunc  src, dst 

 

 

Remarks

src	Specifies how the source blending factor is computed. One of ZERO, ONE, SRC_ALPHA,DST_ALPHA,ONE_MINUS_SRC_ALPHA or ONE_MINUS_DST_ALPHA.
dst	Specifies how the destination blending factor is computed, One of ZERO, ONE, SRC_ALPHA,DST_ALPHA,ONE_MINUS_SRC_ALPHA or ONE_MINUS_DST_ALPHA.

 

The blend function controls how new color values are combined with the values already in the color buffer.

Given a pixel value source and a previous value in the color buffer destination, the computed color is:

 

source × src + destination × dst

 

for each color channel: red, green, blue and alpha.

 

For more details please refer to the FT800 Series Programmer Guide.PDF from FTDI.

 

See also

Color_A