[gtk+] (24 commits) ...docs: Add new GtkGLArea symbols

[Emmanuele Bassi <ebassi src gnome org>]

Summary of changes:

  e1cecd2... gl: Add 'use-es' flag (*)
  d7b5ea8... gl: Relay use-es from context to paint data (*)
  55537cc... gdk: Move GLSL shaders into GResource (*)
  3da7337... gdk: Add 'GDK_GL=gles' flag (*)
  8bb4eb5... gdk: Add GLES shaders (*)
  1620b7b... gl: Add more OpenGL ES checks (*)
  5b03cf1... gl: Use the appropriate format on GLES (*)
  a942e96... gl: Use the appropriate formats when reading buffers on GLE (*)
  fe25ba3... gl: Tweak the swizzle for GLES texture fragments (*)
  2849f2f... wayland: Implement asking for a GLES context (*)
  d40778f... wayland: Honour GDK_GL=gles on context creation (*)
  7d1da94... wayland: Add debugging notes for EGL context creation (*)
  74f4e6e... wayland: Bind the appropriate OpenGL API (*)
  88fed84... x11: Allow creating GLES contexts (*)
  1379b4b... gl: Add fallback for missing subimage unpacking (*)
  f848450... gl: Use a uniform to flip R and B colors on GLES (*)
  a92ba06... tests: Add GLES shaders to testglarea (*)
  b993c7d... tests: Add GLES support to GtkGears (*)
  872b511... demo: Add GLES support to the GtkGLArea demo (*)
  971998d... glarea: Relay the use-es flag to context creation (*)
  b45c7b5... glarea: Use the appropriate texture format for GLES (*)
  79a7e88... docs: Clarify the platform-dependency of GdkGLContext:use-e (*)
  044b5aa... docs: Add new GdkGLContext symbols (*)
  414e86f... docs: Add new GtkGLArea symbols (*)

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