texCUBEsize - returns the size of a given texture image for a given level of detail.
int3 texCUBEsize(samplerCUBE samp, int lod)
int3 texCUBEsize(isamplerCUBE samp, int lod)
int3 texCUBEsize(usamplerCUBE samp, int lod)
Sampler to be queried for size.
Level of detail to obtain size.
Given a sampler and a level of detail the size of the corresponding texture image is returned as
the result of the operation.
texCUBEsize is only supported in gp4 and newer profiles.