[gtk] (22 commits) Non-fast-forward update to branch modern-testsuite

[Benjamin Otte <otte src gnome org>]

The branch 'modern-testsuite' 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:

  80363c3... API: Add gdk_texture_new_from_filename()
  6973d59... testsuite: remove box-order test
  e1e64ed... reftests: Make diff pixels always opaque
  b09547c... reftests: Use GdkTexture instead of cairo_surface_t
  6802e6c... ngl: Fix opacity handling
  51ae420... testuite: Add opacity-overdraw test
  24ea7de... tests: Update rendernode test to use textures
  dd191e4... testsuite: Port compare_render() to use textures
  b4a85a7... reftests: Use 0.6 alpha, not 0.5
  ac5aecd... reftests: Use 0.6 instead of 0.5 for alpha
  6fad558... reftests: Make image-compare use textures
  e0dce79... testsuite: Switch color from khaki to yellow
  386db2d... ngl Fix bottom-right border render failure
  2c62364... ngl: Improve shortcuts for shadow nodes
  80bb31d... ngl: Avoid offscreens in more cases
  7ffb692... rendernodeparser: Handle is_color attribute for glyphs
  222b84f... reftests: Use colors without rounding errors
  1fdb8a8... reftests: XFAIL border-half-pixel test
  79c6306... reftests: Use the default (aka NGL) renderer

Commits added to the branch:

  4bd3793... gltexture: Fix download() for GLES
  6bf2da9... gltexture: Fallback in download_float()
  48ac31f... testsuite: Fix race in texture-threads test
  ca9a08f... API: Add gdk_texture_new_from_filename()
  0d72241... testsuite: remove box-order test
  6ac3061... reftests: Make diff pixels always opaque
  6650e7b... reftests: Use GdkTexture instead of cairo_surface_t
  c8ad4b3... ngl: Fix opacity handling
  2bf3da7... testuite: Add opacity-overdraw test
  f46534e... tests: Update rendernode test to use textures
  f0093f8... testsuite: Port compare_render() to use textures
  c585e3c... reftests: Use 0.6 alpha, not 0.5
  9082158... reftests: Use 0.6 instead of 0.5 for alpha
  6730559... reftests: Make image-compare use textures
  fc8c0de... testsuite: Switch color from khaki to yellow
  9d0200c... ngl Fix bottom-right border render failure
  8213be1... ngl: Improve shortcuts for shadow nodes
  758d55d... ngl: Avoid offscreens in more cases
  576a434... rendernodeparser: Handle is_color attribute for glyphs
  8761e3a... reftests: Use colors without rounding errors
  f9c233e... reftests: XFAIL border-half-pixel test
  872caec... reftests: Use the default (aka NGL) renderer