Cairogradient Draws a gradient on top of image. Filter is given gradient start and end points, colors and opacities. Janne Liljeblad Linear,Radial Pattern Start Color Start Opacity End Color End Opacity Start X Start Y End X End Y Offset normal,add,saturate,multiply,screen,overlay,darken,lighten,colordodge,colorburn,hardlight,softlight,difference,exclusion,hslhue,hslsaturation,hslcolor,hslluminosity Blend Mode