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[Bicyclops <1785552@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 696660 ***
    https://bugs.launchpad.net/bugs/696660

Are you sure this is a duplicate of that issue from 2011? I'm not
requesting preview tonemapping (which would be nice, but is a separate
topic). Some of the images do preview correctly in OpenGL, but others
are completely black - that behavior resembles a bug.

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https://bugs.launchpad.net/bugs/1785552

Title:
  32-bit float image preview broken in OpenGL

Status in Hugin:
  New

Bug description:
  Hello

  32-bit floating-point images (from RawTherapee) load and are previewed
  correctly using the "Preview panorama" button, but the preview is
  broken using "OpenGL Fast panorama preview" - some images are
  completely black, others completely overexposed.

  Sample files and screenshots:
  https://filebin.net/3cp8rzg4e1t84vk2

  Please download these, as the link will expire 2 months from now.

  Operating System: Linux 4.17.0-sabayon x86_64
  Architecture: 64 bit
  Free memory: 2246320 kiB

  Hugin
  Version: 2018.0.0.5abfb4de7961
  Path to resources: /usr/share/hugin/xrc/
  Path to data: /usr/share/hugin/data/
  Hugins camera and lens database: /home/morgan/.hugindata/camlens.db
  Multi-threading using C++11 std::thread and OpenMP
  Monitor profile: B133HAN02.1 #1 2016-10-19 21-46 D6500 2.2 F-S XYZLUT+MTX

  Libraries
  wxWidgets: wxWidgets 3.0.4
  wxWidgets Library (wxGTK port)
  Version 3.0.4 (Unicode: wchar_t, debug level: 1),
  compiled at Jun 14 2018 19:21:01

  Runtime version of toolkit used is 2.24.
  Compile-time GTK+ version is 2.24.31.

  libpano13: 2.9.19 
  Boost: 1.65.0
  Exiv2: 0.26
  SQLite3: 3.23.1
  Vigra: 1.11.0
  LittleCMS2: 2.9

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