[Bug 99247] glReadPixels on Intel N3700 (Braswell) slower than Raspberry Pi

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99247

--- Comment #4 from Pierre Proske <pierre at digitalstar.net> ---
Here's the API trace:
https://www.dropbox.com/s/3sczvrwxho1nxge/CallAndResponse.trace?dl=0

Turns out I'm not using glReadPixels(). In the trace I'm using PBO's. The
alternative to PBO's is in fact glGetTexImage(); Neither produce acceptable
results (i.e. I get around 18fps in Linux, and 30-40fps in Windows).

I'm not drawing anything to the screen, just drawing to an offscreen FBO and
grabbing the pixels from the attached RGB texture. That's the slow bit.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-3d-bugs/attachments/20170106/58c27554/attachment.html>