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,Color dodge,Color burn,Hard light,Soft light,Difference,Exclusion,HSL hue,HSL saturation,HSL color,HSL luminosity Blend Mode