There exist some OpenGL functions (e.g., glDrawElements
<https://www.khronos.org/registry/OpenGL-Refpages/es3.1/html/glDrawElements.xhtml>)
where a single void* param accepts either a byte offset or a pointer value.
What is the appropriate Go param type to wrap such C params? We can't use
unsafe.Pointer because we can't store non-pointer values (offsets) in them.
Using uintptr might work, but my concern is that passing a Go pointer into
C by way of a uintptr value might confuse the GC (specifically, that the
memory would fail to be pinned if/when Go implements a moving GC).
To make this discussion more concrete, using the example of glDrawElements
above, I want to figure out an appropriate type for T:
func GoGlDrawElements(uint32 mode, int32 count, uint32 type, T indices) {
C.glDrawElementsWrapper(mode, count, type, indices)
}
Thanks,
Eric
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