@interface SMUCompositing : NSObject + (id)kCAFilterColorBurnBlendMode; + (id)kCAFilterPlusD; + (id)kCAFilterPlusL; + (id)kCAFilterScreenBlendMode; + (id)kCAFilterSourceAtop; @end
@interface SMUCompositing : NSObject + (id)kCAFilterColorBurnBlendMode; + (id)kCAFilterPlusD; + (id)kCAFilterPlusL; + (id)kCAFilterScreenBlendMode; + (id)kCAFilterSourceAtop; @end