[cogl] (19 commits) Created branch wip/egl-platforms

[Robert Bragg <rbragg src gnome org>]

The branch 'wip/egl-platforms' was created.

Summary of new commits:

  6469b5b... framebuffer: validate width/height in _set_viewport
  e5550e7... Make CoglTexture2D public as experimental API
  5ad0588... Make stub winsys into a proper winsys backend
  14a88f0... Add internal _cogl_get_proc_address
  1a0089e... egl: Check EGL extension as early as possible
  56de2c3... Adds --enable-xlib configure option
  9a5d9e1... egl: check or EGL/eglext.h
  0f2a82d... Add _cogl_egl_texture_2d_new_from_image API
  567bf66... egl: Add x11 texture-from-pixmap support
  51e4cbc... Adds  _cogl_wayland_texture_2d_new_from_buffer API
  d93fe17... glx: make sure _cogl_winsys_get_proc_address is static
  4155b97... renderer: set winsys on renderer before ->renderer_connect
  40b9ad6... egl: fix some #ifdef guards
  e206fb4... cogl-xlib.c: remove unused error_handler()
  48a0f7e... cogl-xlib: fix mixed declarations warning
  ee2ca55... Adds an example cogl wayland compositor
  2fea98c... remove _cogl_xlib_trap/untrap_errors wrappers
  cf196d4... replace _xlib_add_filter use with _cogl_renderer API
  75d0bfb... stash