[Bug 37142] Too much vertex buffers uploads

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=37142

--- Comment #4 from Pierre-Eric Pelloux-Prayer <pelloux at gmail.com> 2011-05-12 13:27:09 PDT ---
(In reply to comment #2)
> (In reply to comment #0)
> > What do you think ?
> 
> You can't optimize the uploads because the sizes of all buffers are not known
> when glLockArraysEXT is called. The only things you've got are pointers to the
> buffers.

Sure, but I was thinking to something more like : 
- glLockArraysEXT does nothing more than curently
- uploading a vertex buffer is done as before except in one case : when trying
to upload the same buffer AND glLock is enabled => the uploading is skipped as
data is already in GPU memory (which is the case shown in the attached trace
file)

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