[Bug 106390] Invalid imageAtomicExchange() writes.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106390

            Bug ID: 106390
           Summary: Invalid imageAtomicExchange() writes.
           Product: Mesa
           Version: 18.0
          Hardware: x86 (IA32)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Vulkan/intel
          Assignee: intel-3d-bugs at lists.freedesktop.org
          Reporter: frustumo at gmail.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org
                CC: jason at jlekstrand.net

Created attachment 139324
  --> https://bugs.freedesktop.org/attachment.cgi?id=139324&action=edit
Screenshots and shader

imageAtomicExchange() performs writing with invalid data layout for rgba8
texture. imageStore() works fine. The same behavior for OpenGL and Vulkan.

glxinfo:
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Iris Pro Graphics 580 (Skylake GT4e)
OpenGL core profile version string: 4.5 (Core Profile) Mesa 18.0.0-rc4

vulkaninfo:
Vulkan Instance Version: 1.1.73
apiVersion     = 0x400039  (1.0.57)
driverVersion  = 75497472 (0x4800000)
vendorID       = 0x8086
deviceID       = 0x193b

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