auto sRGB linearRGB inherit userSpaceOnUse objectBoundingBox userSpaceOnUse objectBoundingBox userSpaceOnUse objectBoundingBox userSpaceOnUse objectBoundingBox normal multiply screen darken lighten matrix saturate hueRotate luminanceToAlpha over in out atop xor arithmetic identity table discrete linear gamma identity table discrete linear gamma identity table discrete linear gamma identity table discrete linear gamma duplicate wrap none R G B A R G B A erode dilate stitch noStitch fractalNoise turbulence