[cogl/rbradford/wayland-resize] wayland: Add a cogl_wayland_onscreen_resize function

[Rob Bradford <rbradford src gnome org>]

commit 1b9dc5f6d24d28f9b356a6798b438d2456ec3de4
Author: Rob Bradford <rob linux intel com>
Date:   Thu Jan 12 14:49:27 2012 +0000

    wayland: Add a cogl_wayland_onscreen_resize function
    
    This function will call into the Wayland EGL platform API and resize the
    surface that the window is using and update the internal dimensions for
    framebuffer and viewport to reflect the change.

 cogl/cogl-onscreen.h                  |    7 +++++++
 cogl/winsys/cogl-winsys-egl-wayland.c |   24 ++++++++++++++++++++++++
 2 files changed, 31 insertions(+), 0 deletions(-)
---
diff --git a/cogl/cogl-onscreen.h b/cogl/cogl-onscreen.h
index 9bcc769..12995ea 100644
--- a/cogl/cogl-onscreen.h
+++ b/cogl/cogl-onscreen.h
@@ -133,6 +133,13 @@ struct wl_surface *
 cogl_wayland_onscreen_get_surface (CoglOnscreen *onscreen);
 struct wl_shell_surface *
 cogl_wayland_onscreen_get_shell_surface (CoglOnscreen *onscreen);
+
+void
+cogl_wayland_onscreen_resize (CoglOnscreen *onscreen,
+                              gint          width,
+                              gint          height,
+                              gint          offset_x,
+                              gint          offset_y);
 #endif /* COGL_HAS_EGL_PLATFORM_WAYLAND_SUPPORT */
 
 #define cogl_onscreen_set_swap_throttled cogl_onscreen_set_swap_throttled_EXP
diff --git a/cogl/winsys/cogl-winsys-egl-wayland.c b/cogl/winsys/cogl-winsys-egl-wayland.c
index 0b7ff26..eecacec 100644
--- a/cogl/winsys/cogl-winsys-egl-wayland.c
+++ b/cogl/winsys/cogl-winsys-egl-wayland.c
@@ -499,6 +499,30 @@ cogl_wayland_onscreen_get_shell_surface (CoglOnscreen *onscreen)
     return NULL;
 }
 
+void
+cogl_wayland_onscreen_resize (CoglOnscreen *onscreen,
+                              gint          width,
+                              gint          height,
+                              gint          offset_x,
+                              gint          offset_y)
+{
+  CoglFramebuffer *fb;
+
+  fb = COGL_FRAMEBUFFER (onscreen);
+  if (fb->allocated)
+    {
+      CoglOnscreenEGL *egl_onscreen = onscreen->winsys;
+      CoglOnscreenWayland *wayland_onscreen = egl_onscreen->platform;
+
+      wl_egl_window_resize (wayland_onscreen->wayland_egl_native_window,
+                            width,
+                            height,
+                            offset_x,
+                            offset_y);
+       _cogl_framebuffer_winsys_update_size (fb, width, height);
+    }
+}
+
 static const CoglWinsysEGLVtable
 _cogl_winsys_egl_vtable =
   {