From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 101572] glMemoryBarrier is backwards Date: Tue, 27 Jun 2017 09:12:10 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0173533869==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [IPv6:2610:10:20:722:a800:ff:fe98:4b55]) by gabe.freedesktop.org (Postfix) with ESMTP id 4F5806E379 for ; Tue, 27 Jun 2017 09:12:10 +0000 (UTC) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org --===============0173533869== Content-Type: multipart/alternative; boundary="14985547301.48eca.12307"; charset="UTF-8" --14985547301.48eca.12307 Date: Tue, 27 Jun 2017 09:12:10 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated https://bugs.freedesktop.org/show_bug.cgi?id=3D101572 Nicolai H=C3=A4hnle changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |NOTOURBUG --- Comment #1 from Nicolai H=C3=A4hnle --- You're misinterpreting the spec. glMemoryBarrier ensures that **writes from shaders** are visible to whatever consumer you indicate with the given flag bits. What you seem to be trying to do is ensure that **writes via the framebuffe= r** are visible in subsequent compute shader invocations. For that, you need to either: (1) Bind a different framebuffer, or (probably more appropriate to what you= 're trying to do) (2) use glTextureBarrier. --=20 You are receiving this mail because: You are the assignee for the bug.= --14985547301.48eca.12307 Date: Tue, 27 Jun 2017 09:12:10 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated Nicolai H=C3=A4hnle changed bug 10157= 2
What Removed Added
Status NEW RESOLVED
Resolution --- NOTOURBUG

Commen= t # 1 on bug 10157= 2 from Nicolai H=C3=A4hnle 
You're misinterpreting the spec.

glMemoryBarrier ensures that **writes from shaders** are visible to whatever
consumer you indicate with the given flag bits.

What you seem to be trying to do is ensure that **writes via the framebuffe=
r**
are visible in subsequent compute shader invocations. For that, you need to
either:

(1) Bind a different framebuffer, or (probably more appropriate to what you=
're
trying to do)
(2) use glTextureBarrier.

You are receiving this mail because:
  • You are the assignee for the bug.
= --14985547301.48eca.12307-- --===============0173533869== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KZHJpLWRldmVs IG1haWxpbmcgbGlzdApkcmktZGV2ZWxAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHBzOi8vbGlz dHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vZHJpLWRldmVsCg== --===============0173533869==--