/**
* Size of the header data. For simple data, like glColorPointerfv,
* this is 4. For complex data that requires either a count (e.g.,
* glWeightfvARB), an index (e.g., glVertexAttrib1fvARB), or a
* selector enum (e.g., glMultiTexCoord2fv) this is 8.
*/
/**
* Size of the header data. For simple data, like glColorPointerfv,
* this is 4. For complex data that requires either a count (e.g.,
* glWeightfvARB), an index (e.g., glVertexAttrib1fvARB), or a
* selector enum (e.g., glMultiTexCoord2fv) this is 8.
*/