On 2014-09-02 18:58, Emil Velikov wrote:
Hi Samuel,
On 02/09/14 17:22, Samuel Iglesias Gonsálvez wrote:
Adding Kristian in Cc.
Sam
On Tue, 2014-09-02 at 18:16 +0200, Samuel Iglesias Gonsálvez wrote:
Hello,
Two weeks ago, Iago and myself sent a batch of patches that added
geometry shader support for SandyBridge [0].
Recently, we rebased our patches against master [1] and found
that some things are not working properly any more. Particularly, we
have plenty of cases where we only get a black screen when using a
geometry shader, and in these cases it seems as if some outputs of
the
geometry shader got "lost" by the time they become inputs in the
fragment shader (some input varyings in the fragment shader that come
from the outputs of the geometry seem to be zeroed). The values we
output in the geometry shader are correct though, since they are
correctly captured by transform feedback.
A bisect shows that the commit that introduced this problem is
2f28a0dc231 i965: Implement fast color clears using meta operations
[2].
Seemingly the commit caused some issues which should be fixed with the
following. AFAICS the patch has landed in master, but I'm not sure if
your
work is based on top of it or not.
http://lists.freedesktop.org/archives/mesa-dev/2014-August/066917.html
Yes, we rebased the patches on top of today's master (5a4e0f3) which
also has the commit you mention.
Sam
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