[gtk] (11 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:

  cc6cc19... memorytexture: Split out GdkMemoryFormat handling
  d087b8b... gl: Move memory <=> GL format mapping
  45274bf... memoryformat: Add gdk_memory_format_prefers_high_depth()
  83eb084... gdk: hdr => high depth
  8ac51ed... texture: Add highdepth api
  2af3900... gsk: Add high depth rendernode api
  d612dc7... ngl: Allow specifying texture formats
  da54b69... ngl: Determine intermediate formats
  c109de6... ngl: Update framebuffer format for each frame

Commits added to the branch:

  48781cf... memorytexture: Split out GdkMemoryFormat handling (*)
  149395c... gl: Move memory <=> GL format mapping (*)
  afa004f... memoryformat: Add gdk_memory_format_prefers_high_depth() (*)
  dc6e831... gdk: hdr => high depth (*)
  3f4fb93... cairo: Use GdkTexture for converting from pixbuf (*)
  2e555db... testsuite: Fail more accurately (*)
  c89503b... texture: Add highdepth api
  f8345b1... gsk: Add high depth rendernode api
  20afe1e... ngl: Allow specifying texture formats
  543832b... ngl: Determine intermediate formats
  690c624... ngl: Update framebuffer format for each frame

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