tex2DARRAYsize - returns the size of a given texture array image for a given level of detail.
int3 tex2DARRAYsize(sampler2DARRAY samp, int lod)
int3 tex2DARRAYsize(isampler2DARRAY samp, int lod)
int3 tex2DARRAYsize(usampler2DARRAY samp, int lod)
Sampler to be queried for size.
Level of detail to obtain size.
Given a sampler array and a level of detail the size of one element of the corresponding texture
array for a given level of detail is returned as a result of the operation.
tex2DARRAYsize is only supported in gp4 and newer profiles.