[gtk] (38 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:

  948a79f... Add gdk_texture_new_from_bytes
  92229ea... texture: Mention download_float in the docs
  cdc6f6e... texture: Add error enum
  bbb4177... Add code to load and save pngs
  ccfebe3... Load pngs without gdk-pixbuf
  20ed107... Save pngs without cairo
  2e04507... Add tests for the png loader
  4c5fe24... Add gdk_texture_save_to_png_bytes
  1411b6c... Add code to load and save tiff files
  4417357... Load tiffs without gdk-pixbuf
  6d4e96f... Add tests for the tiff loader
  3b551db... Add gdk_texture_save_to_tiff
  1fb4eee... Add code to load jpegs
  a11cf4d... Load jpegs without gdk-pixbuf
  13a807a... Add tests for the jpeg loader
  f9f8b6a... Use our own loaders for content (de)serialization
  340f961... Add contentserializer tests for textures
  be09003... rendernodeparser: Use gdk_texture_save_to_png_bytes
  f14f08f... rendernodeparser: Avoid gdk_texture_new_for_pixbuf
  ca3a573... texture: Add gdk_texture_save_to_tiff_bytes()
  1ca0fcb... testsuite: Add png and tiff methods
  514d9ce... texture: Avoid pixbufs when loading resources
  49cb494... texture: Remove declaration for nonexisting function
  82bdf76... texture: Split out type detection
  b5f8763... texture: Add private can_load() function
  9eecfb9... icontheme: Load textures directly when possible
  98c56b6... pixbufutils: Simplify function
  edf92e4... icontheme: Use textures more
  3dd1628... builder: create textures without pixbufs
  86172b8... cssimageurl: Just create a texture directly
  43132bd... builder: Stop using pixbufutils
  b7050dd... Add code to save jpegs
  55b8fd5... contentdeserializer: Use our on jpeg loader
  b4f85a1... ngl: Avoid cairo_to_png in debug output
  085832a... Fix memorytexture float conversion
  b587d86... Support 16bit formats in the png loader
  41a17bf... testsuite: remove box-order test
  6b8deef... reftests: Use GdkTexture instead of cairo_surface_t
  0edd78b... testuite: Add opacity-overdraw test

Commits added to the branch:

  75b45ae... Fix memorytexture float conversion (*)
  eb23e23... ngl: Avoid cairo_to_png in debug output (*)
  7c2be93... Merge branch 'matthiasc/for-master' into 'master' (*)
  1230bce... Add gdk_texture_new_from_bytes (*)
  9f8d6ff... texture: Mention download_float in the docs (*)
  7fd8899... pixbufutils: Simplify function (*)
  fe46da1... Merge branch 'misc-texture-things' into 'master' (*)
  2b4be0b... texture: Add error enum
  243b8d3... Add code to load and save pngs
  39a01d8... Load pngs without gdk-pixbuf
  de999c3... Save pngs without cairo
  b925738... Add tests for the png loader
  abec4fd... Add gdk_texture_save_to_png_bytes
  02a731d... Add code to load and save tiff files
  82b1c4a... Load tiffs without gdk-pixbuf
  0793faf... Add tests for the tiff loader
  33eb58b... Add gdk_texture_save_to_tiff
  8080493... Add code to load jpegs
  9e85aff... Load jpegs without gdk-pixbuf
  a202e63... Add tests for the jpeg loader
  967009e... Use our own loaders for content (de)serialization
  482aa1d... Add contentserializer tests for textures
  74f7e7b... rendernodeparser: Use gdk_texture_save_to_png_bytes
  4b8b294... rendernodeparser: Avoid gdk_texture_new_for_pixbuf
  d13442e... texture: Add gdk_texture_save_to_tiff_bytes()
  d7e5665... testsuite: Add png and tiff methods
  97654c4... texture: Avoid pixbufs when loading resources
  3d44e05... texture: Remove declaration for nonexisting function
  b5af18e... texture: Split out type detection
  ed9c88e... texture: Add private can_load() function
  a5d27eb... icontheme: Load textures directly when possible
  439ca27... icontheme: Use textures more
  3b5d259... builder: create textures without pixbufs
  3426965... cssimageurl: Just create a texture directly
  1ba0ff0... builder: Stop using pixbufutils
  6dba940... Add code to save jpegs
  b29a976... contentdeserializer: Use our on jpeg loader
  24737f4... Support 16bit formats in the png loader

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