[gtk] (7 commits) Non-fast-forward update to branch wip/matthiasc/gsk-hdr

[Matthias Clasen <matthiasc src gnome org>]

The branch 'wip/matthiasc/gsk-hdr' 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:

  cd7d079... gdk: Fix an oversight
  1841b55... texture: Add hdr api
  3303fb2... gsk: Add hdr rendernode api
  4c2e19c... ngl: Allow specifying texture formats
  a7f2abe... ngl: Determine intermediate formats
  5c57dc2... ngl: Update hdr for each frame

Commits added to the branch:

  f819e88... gdk: Fix an oversight (*)
  4360bc3... Merge branch 'matthiasc/for-master' into 'master' (*)
  95b01af... texture: Add hdr api
  720bd4a... gsk: Add hdr rendernode api
  f43af89... ngl: Allow specifying texture formats
  ca5565e... ngl: Determine intermediate formats
  d757905... ngl: Update hdr for each frame

(*) This commit already existed in another branch; no separate mail sent