[Bug 97852] Unreal Engine corrupted preview viewport

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97852

            Bug ID: 97852
           Summary: Unreal Engine corrupted preview viewport
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: mw at graph-ix.net
        QA Contact: dri-devel at lists.freedesktop.org

Created attachment 126603
  --> https://bugs.freedesktop.org/attachment.cgi?id=126603&action=edit
Viewport corruption

Unreal Engine 4.13.1 editor shows corrupted preview viewports when at least one
of the following post-processing effects is active in a viewport:
* Motion Blur
* Tonemapper

A screenshot of a viewport segment is attached.

When both effects are turned off, viewports appear to render correctly.


Graphics card: AMD TONGA chipset (Radeo R9 380)
Mesa version: 12.1~git1600917222200.073129c~x~padoka0 on Ubuntu 16.04 with
Padoka PPA
glxinfo:
  OpenGL core profile version string: 4.3 (Core Profile) Mesa 12.1.0-devel -
padoka PPA
  OpenGL version string: 3.0 Mesa 12.1.0-devel - padoka PPA
  OpenGL ES profile version string: OpenGL ES 3.1 Mesa 12.1.0-devel - padoka
PPA

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