Here is a list of all documented struct and union fields with links to the struct/union documentation for each field:

customFilter : tjtransform
data : tjtransform
denom : tjscalingfactor
h : tjregion
num : tjscalingfactor
op : tjtransform
options : tjtransform
r : tjtransform
w : tjregion
x : tjregion
y : tjregion