Table 142 – Variables used in the group compositing formulas

Variable

Meaning

Ei

Element i of the group: a compound variable representing the element’s colour, shape, opacity, and blend mode

fsi

Source shape for element E i

fji

Object shape for element E i

fmi

Mask shape for element E i

fki

Constant shape for element E i

fgi

Group shape: the accumulated source shapes of group elements E 1 to E i , excluding the initial backdrop

qmi

Mask opacity for element E i

qki

Constant opacity for element E i

αsi

Source alpha for element E i

αji

Object alpha for element E i : the product of its object shape and object opacity

αgi

Group alpha: the accumulated source alphas of group elements E 1 to E i , excluding the initial backdrop

αi

Accumulated alpha after compositing element E i , including the initial backdrop

Csi

Source colour for element E i

Ci

Accumulated colour after compositing element E i , including the initial backdrop

BiCi1–Csi,()

Blend function for element E i