[gtk] (28 commits) Non-fast-forward update to branch image-loading

[Matthias Clasen <matthiasc src gnome org>]

The branch 'image-loading' 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:

  693dd10... Add gdk_texture_new_from_bytes
  fb6a141... texture: Add error enum
  79eadf2... Add code to load and save pngs
  a7c587e... Load pngs without gdk-pixbuf
  57f3d9e... Save pngs without cairo
  d66ccc6... Add tests for the png loader
  616fb93... Add gdk_texture_save_to_png_bytes
  4ab87b4... Add code to load and save tiff files
  d6e79a4... Load tiffs without gdk-pixbuf
  236d589... Add tests for the tiff loader
  f9c175b... Add gdk_texture_save_to_tiff
  5e938a3... Add code to load jpegs
  771f8bf... Load jpegs without gdk-pixbuf
  722decb... Add tests for the jpeg loader
  56e9014... Use our own loaders for content (de)serialization
  c430175... Add contentserializer tests for textures
  c5b606b... rendernodeparser: Use gdk_texture_save_to_png_bytes
  14f4fe4... rendernodeparser: Avoid gdk_texture_new_for_pixbuf
  d4316c8... texture: Add gdk_texture_save_to_tiff_bytes()
  23db33e... testsuite: Add png and tiff methods

Commits added to the branch:

  099c923... searchbar: Vertically center the close button (*)
  8f9a517... media-controls: Make play button flat (*)
  b1a5c3f... Merge branch 'wip/exalm/papercuts' into 'master' (*)
  ddec3de... ci: Add libtiff-devel to the image (*)
  c70fdd6... ci: Use the v4 image (*)
  cda5d2d... Merge branch 'tiff-ci' into 'master' (*)
  662fb01... Add gdk_texture_new_from_bytes
  f7dc2f7... texture: Mention download_float in the docs
  416e95f... texture: Add error enum
  62a3862... Add code to load and save pngs
  e4656f4... Load pngs without gdk-pixbuf
  a971025... Save pngs without cairo
  384ae20... Add tests for the png loader
  707de45... Add gdk_texture_save_to_png_bytes
  185cfb2... Add code to load and save tiff files
  e7c479e... Load tiffs without gdk-pixbuf
  2c9eb2c... Add tests for the tiff loader
  bb197e7... Add gdk_texture_save_to_tiff
  a272519... Add code to load jpegs
  e00800a... Load jpegs without gdk-pixbuf
  aebc16a... Add tests for the jpeg loader
  b34a5e7... Use our own loaders for content (de)serialization
  1f33363... Add contentserializer tests for textures
  ce44ac5... rendernodeparser: Use gdk_texture_save_to_png_bytes
  1062e28... rendernodeparser: Avoid gdk_texture_new_for_pixbuf
  a303edc... texture: Add gdk_texture_save_to_tiff_bytes()
  3fef5bf... testsuite: Add png and tiff methods
  0e99323... texture: Avoid pixbufs when loading resources

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