[gtk] (24 commits) Non-fast-forward update to branch image-loading

[Benjamin Otte <otte 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:

  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

Commits added to the branch:

  7a12233... ci: Add libtiff-devel to the image
  83d38e7... ci: Use the v4 image
  fa9ad84... Add gdk_texture_new_from_bytes
  c985249... texture: Mention download_float in the docs
  39664a1... texture: Add error enum
  7bfadde... Add code to load and save pngs
  b370aaf... Load pngs without gdk-pixbuf
  31ee3bb... Save pngs without cairo
  59b3290... Add tests for the png loader
  afb095d... Add gdk_texture_save_to_png_bytes
  d00d5d5... Add code to load and save tiff files
  d16c05d... Load tiffs without gdk-pixbuf
  b1b5cc5... Add tests for the tiff loader
  a07e0b7... Add gdk_texture_save_to_tiff
  9a27036... Add code to load jpegs
  0be9060... Load jpegs without gdk-pixbuf
  cecfb2a... Add tests for the jpeg loader
  5319b23... Use our own loaders for content (de)serialization
  5addf9c... Add contentserializer tests for textures
  4cacfe6... rendernodeparser: Use gdk_texture_save_to_png_bytes
  c7e2a87... rendernodeparser: Avoid gdk_texture_new_for_pixbuf
  b4f3139... texture: Add gdk_texture_save_to_tiff_bytes()
  7360bf4... testsuite: Add png and tiff methods
  527084d... texture: Avoid pixbufs when loading resources