[gtk] (7 commits) Non-fast-forward update to branch wip/otte/float-textures

[Benjamin Otte <otte src gnome org>]

The branch 'wip/otte/float-textures' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  59acd05... memorytexture: Add support for HDR formats
  db8efc2... gl: Implement uploading and downloading HDR formats
  ae11756... testsuite: Overhaul memorytexture test
  bebead8... testsuite: Rework memorytexture test some more
  473c790... testsuite: Add tests uploading the memorytextures
  3676b6f... testsuite: Add memory test support for OpenGL up/downloads
  0f94340... testsuite: Add tests for gdk_texture_download_float()

Commits added to the branch:

  625e11b... memorytexture: Add support for HDR formats
  6a411ba... gl: Implement uploading and downloading HDR formats
  0c32a57... testsuite: Overhaul memorytexture test
  8a12291... testsuite: Rework memorytexture test some more
  e93a5df... testsuite: Add tests uploading the memorytextures
  64be1c3... testsuite: Add memory test support for OpenGL up/downloads
  1eab32c... testsuite: Add tests for gdk_texture_download_float()