5.5. fontblend¶

The register function

fontblend.blendfunction(fun)[source]¶

Registers a class as a blend function

Parameters:	fun – A function that takes two numpy images, blends them and then returns the resulting image.

Example:

@blendfunction
def my_blend_function(base, blend):
    return base + blend

The rest of the functions

fontblend.blendcolorburn(base, blend)[source]¶

R = 1 - (1 - base) / blend

Parameters:	base – The base image blend – The blend image

fontblend.blendcolordodge(base, blend)[source]¶

R = base / (1 - blend)

Parameters:	base – The base image blend – The blend image

fontblend.blenddarken(base, blend)[source]¶

R = min( base, blend )

Parameters:	base – The base image blend – The blend image

fontblend.blendlighten(base, blend)[source]¶

R = max( base, blend )

Parameters:	base – The base image blend – The blend image

fontblend.blendlinearburn(base, blend)[source]¶

R = base + blend - 1

Parameters:	base – The base image blend – The blend image

fontblend.blendlineardodge(base, blend)[source]¶

R = base + blend

Parameters:	base – The base image blend – The blend image

fontblend.blendmultiply(base, blend)[source]¶

R = base * blend

Parameters:	base – The base image blend – The blend image

fontblend.blendnormal(base, blend)[source]¶

R = blend

Parameters:	base – The base image blend – The blend image

fontblend.blendscreen(base, blend)[source]¶

R = 1 - (1 - base) * (1 - blend)

Parameters:	base – The base image blend – The blend image