This CL enables use of a bound buffer at TexSubImage2D by allowing
nil (0) data, which indicates the head of the bound buffer.
In the long run, we need to be able to pass non-0 integer to not
only TexSubImage2D but also other functions like TexImage2D. As we
might change the API, let's revisit this issue later.
Fixesgolang/go#36355
Change-Id: I66f6650b10fca9a346cfa6eba246ea9286ed3a85
Reviewed-on: https://go-review.googlesource.com/c/mobile/+/213077
Run-TryBot: Hajime Hoshi <hajimehoshi@gmail.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
0c13fd3166