[mutter] (33 commits) Non-fast-forward update to branch wip/nielsdg/add-docs

[Niels De Graef <nielsdg src gnome org>]

The branch 'wip/nielsdg/add-docs' 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:

  1b3a5c4... Add some gtk-doc comments.

Commits added to the branch:

  d539fe2... Use G_DECLARE_DERIVABLE/FINAL_TYPE on some types (*)
  f7d4a72... build: Always pass --quiet to g-ir-scanner (*)
  177d0c2... gpu/kms: Use correct DRM event context version (*)
  b329256... cogl/texture-2d-gl: Try to determine format for external te (*)
  c681cce... cogl/texture-2d-gl: Bind correct target when getting data (*)
  eac1864... cogl/texture: Add API to check whether _get_data() will wor (*)
  37e36e8... compositor: Make meta_actor_painting_untransformed take a f (*)
  e1370ee... shaped-texture: Put actual texture painting in helper (*)
  36b46af... boxes: Add helper to scale rectangles by a double (*)
  1755a8b... shaped-texture: Fix include order (*)
  d3301d6... shaped-texture: Stop using gdk rect helper (*)
  f9118fb... shaped-texture: Don't change the callers clip rect (*)
  c84d7eb... shaped-texture: Get transformed textures pixels via offscre (*)
  012691b... shaped-texture: Draw external textures via offscreen (*)
  2fe05d7... x11-display: Add back _GTK_EDGE_CONSTRAINTS as supported hi (*)
  60f7ff3... window-actor: Turn into a derivable class (*)
  7e8fc13... Add MetaWindowActorX11 and MetaWindowActorWayland (*)
  ac2f8ca... window-actor: Select X11 or Wayland actor based on client t (*)
  80e3c1d... window-actor: Move X11-specific code to MetaWindowActorX11 (*)
  0442fc8... window-actor: Cleanup includes (*)
  7952808... Document window and surface actors (*)
  54febd1... window-actor: Move window actor creation to MetaCompositor (*)
  5fbeeca... window-actor: Remove post_init() vfunc (*)
  df1384a... window-actor: Turn into an abstract class (*)
  173867c... renderer/native: Use shadow fb on software GL if preferred (*)
  490f27e... shaped-texture: Use actual texture if tower returned NULL (*)
  676a8da... monitor-transform: Move helper functions into their own fil (*)
  b7a9c7e... monitor-transform: Add helper function transform_invert() (*)
  686b7f8... boxes: Add API to transform a MetaRectangle (*)
  d52081b... shaped-texture: Invert transform of damage in update_area() (*)
  51e4fe7... shaped-texture: Indentation fix in update_area() (*)
  93c2931... clutter-stage: Don't emit "after-paint" when picking (*)
  0478c22... Add some gtk-doc comments.

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