[Bug 105532] Broken map generation in Northgard game

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105532

            Bug ID: 105532
           Summary: Broken map generation in Northgard game
           Product: Mesa
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: alexander at tsoy.me
        QA Contact: dri-devel at lists.freedesktop.org

Created attachment 138148
  --> https://bugs.freedesktop.org/attachment.cgi?id=138148&action=edit
northgard_screenshot.png

Map generation is broken in Northgard game in single player mode. See
screenshot. Game developers describe map generation process as follows [1]:
"The game rendering seems to be working fine, only map generation seems to be
broken on some drivers. This involves rendering 2D vectorized shapes and then
reading back the resulting graphics buffer. Nothing fancy, but we had some
issues in OpenGL with some Intel HD drivers on Windows in the past. Using
DirectX (same code, just different driver) did fix the issue for these users."

Map generation is working fine with llvmpipe driver
(LIBGL_ALWAYS_SOFTWARE=true).

OpenGL renderer string: AMD Radeon (TM) R9 380 Series (TONGA / DRM 3.19.0 /
4.14.26-gentoo, LLVM 6.0.0)

[1]
http://steamcommunity.com/app/466560/discussions/0/1698293255121560931/?ctp=4#c1698293255133166837

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