cocoa - Set the CALayer blending mode using CIFilters -

cocoa - Set the CALayer blending mode using CIFilters -

i'm trying using property backgroundfilters of calayer manage sort of blendmode.

this current structure:

layer | |_______layer b the layer a content image. the layer b sublayer of layer a , has reddish backgroundcolor

what i'm trying blending content of layer a using backgroundcolor of layer b.

i added b filter way:

cifilter *blending = [cifilter filterwithname:@"cicolorblendmode"]; blending.name = @"blendingfilter"; [blending setdefaults]; layerb.filters = [nsarray arraywithobject:blending];

but doesn't work.

which right way create colorblending effect between 2 layers?

(i'm working on osx not ios)

cocoa calayer