[gtk+] (17 commits) Non-fast-forward update to branch wip/ebassi/gsk-renderer

[Emmanuele Bassi <ebassi src gnome org>]

The branch 'wip/ebassi/gsk-renderer' 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:

  d827259... Initial implementation of GSK rendering pipeline
  e7178c2... build: Add GSK deps to GTK
  4e18a6c... gdk: Add utility for uploading Cairo surfaces to GL
  2e3d231... gsk: Rename shaders for OpenGL
  1ec2a38... gsk: Use surface-to-texture utility function
  d6a1402... gsk: Port GskGLRenderer to GLES
  5e1bf56... gsk: Add GskRenderer::clear_tree
  fcb095f... gsk: Flush the GL render items cache
  b65a7b5... gsk: Rework GskRenderer and GskRenderNode semantics
  45e354f... gtk: Add a GskRenderer to GtkWindow
  47948a1... gtk: Use GskRenderNode to render widgets
  99b8f1a... gsk: Turn GskRenderNode into a pure GTypeInstance
  117ca99... gsk: Group render state attributes
  d70f017... gsk: Allow sampling between parent and child nodes

Commits added to the branch:

  f1ac029... Initial implementation of GSK rendering pipeline
  41d1d94... build: Add GSK deps to GTK
  069daea... gdk: Add utility for uploading Cairo surfaces to GL
  05432ab... gsk: Rename shaders for OpenGL
  35dc304... gsk: Use surface-to-texture utility function
  8dead12... gsk: Port GskGLRenderer to GLES
  1318871... gsk: Add GskRenderer::clear_tree
  e791049... gsk: Flush the GL render items cache
  a7e1437... gsk: Rework GskRenderer and GskRenderNode semantics
  83b3204... gtk: Add a GskRenderer to GtkWindow
  b8a8bf6... gtk: Use GskRenderNode to render widgets
  a25bd6b... gsk: Turn GskRenderNode into a pure GTypeInstance
  7eb1984... gsk: Group render state attributes
  a739537... gsk: Allow sampling between parent and child nodes
  5a8ccfd... gsk: Make GskBlendMode enumeration public
  1ce48fd... gsk: Store blend mode in the render node
  0718378... gsk: Use the node's blend mode in the GL renderer