[gtk] (29 commits) Non-fast-forward update to branch gamma-shenanigans

[Matthias Clasen <matthiasc src gnome org>]

The branch 'gamma-shenanigans' 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:

  c2279b0... Refactor gdk_gl_context_upload_texture slightly
  e049e63... Support 16bit textures
  39ee2fc... Add private api to download textures
  68f07b7... Support loading and saving 16bit pngs
  360e1f1... Support 16-bit floating point textures
  e38e376... Support 32-bit floating point textures
  a1626fb... Add gdk_texture_save_to_file
  4b02164... Support loading and saving float textures
  f6a257b... Redo the conversion setup for memory formats
  c0144c1... Allow conversion to hdr formats
  229302e... Add gdk_texture_download_float
  4af3b6b... Add async png load/save code
  2ef4e42... Add vecorized half-float conversion
  504b48f... Improve half-float memory conversions
  f25578f... png: Handle all formats when saving
  e3a43e5... Use our png loader for content (de)serialization
  2031b66... Add async tiff load/save code
  48ba92e... Use our tiff loader for content (de)serialization
  c222973... Add a jpeg loader
  c59495f... Load jpegs without gdk-pixbuf

Commits added to the branch:

  643a91b... Fix the testupload test (*)
  3ada664... Merge branch 'matthiasc/for-master' into 'master' (*)
  3d27ff1... Update German translation (*)
  76f481e... Stop using config.h.meson (*)
  155a4fa... Add vectorized half-float conversion (*)
  c1c1d44... Refactor gdk_gl_context_upload_texture slightly (*)
  bfbd95d... Merge branch 'matthiasc/for-master' into 'master' (*)
  2963468... Update French translation (*)
  1a4eebe... Update French translation (*)
  f643045... Support 16bit textures
  e1295d3... Add private api to download textures
  3e4f8dc... Add code to load and save pngs
  4fcb46a... Support loading and saving 16-bit textures
  9a9d20e... Support 16-bit floating point textures
  dcde46a... Support 32-bit floating point textures
  512580b... Add gdk_texture_save_to_file
  97e34ed... Add code to load and save tiff files
  d389c11... Support loading and saving float textures
  0f43857... Redo the conversion setup for memory formats
  751ccf4... Allow conversion to hdr formats
  5e42e78... Add gdk_texture_download_float
  32ef5be... Add async png load/save code
  5a9c81a... png: Handle all formats when saving
  7725c84... Use our png loader for content (de)serialization
  53f6766... Add async tiff load/save code
  da59d70... tiff: Handle all formats when loading
  5923766... Use our tiff loader for content (de)serialization
  1c8c852... Add code to load jpegs
  9d4f241... Load jpegs without gdk-pixbuf

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