[cogl] wayland: implement poll_get_info and poll_dispatch

[Robert Bragg <rbragg src gnome org>]

commit 323fe1887487f19c3e26aa6b7644de31d8d0a532
Author: Andreas Oberritter <obi saftware de>
Date:   Tue Apr 16 20:22:15 2013 +0100

    wayland: implement poll_get_info and poll_dispatch
    
    Call wl_display_dispatch on POLLIN. This follows the implementation
    in weston/clients/window.c and improves integration of input events,
    at least.
    
    Signed-off-by: Andreas Oberritter <obi saftware de>
    Reviewed-by: Robert Bragg <robert linux intel com>

 cogl/winsys/cogl-winsys-egl-wayland.c |   44 +++++++++++++++++++++++++++++++++
 1 files changed, 44 insertions(+), 0 deletions(-)
---
diff --git a/cogl/winsys/cogl-winsys-egl-wayland.c b/cogl/winsys/cogl-winsys-egl-wayland.c
index 6fda3f4..d7f7dc0 100644
--- a/cogl/winsys/cogl-winsys-egl-wayland.c
+++ b/cogl/winsys/cogl-winsys-egl-wayland.c
@@ -50,6 +50,7 @@ typedef struct _CoglRendererWayland
   struct wl_compositor *wayland_compositor;
   struct wl_shell *wayland_shell;
   struct wl_registry *wayland_registry;
+  CoglPollFD poll_fd;
 } CoglRendererWayland;
 
 typedef struct _CoglDisplayWayland
@@ -175,6 +176,10 @@ _cogl_winsys_renderer_connect (CoglRenderer *renderer,
   if (!_cogl_winsys_egl_renderer_connect_common (renderer, error))
     goto error;
 
+  wayland_renderer->poll_fd.fd =
+    wl_display_get_fd(wayland_renderer->wayland_display);
+  wayland_renderer->poll_fd.events = COGL_POLL_FD_EVENT_IN;
+
   return TRUE;
 
 error:
@@ -565,6 +570,42 @@ cogl_wayland_onscreen_resize (CoglOnscreen *onscreen,
     _cogl_framebuffer_winsys_update_size (fb, width, height);
 }
 
+static void
+_cogl_winsys_poll_get_info (CoglContext *context,
+                            CoglPollFD **poll_fds,
+                            int *n_poll_fds,
+                            int64_t *timeout)
+{
+  CoglDisplay *display = context->display;
+  CoglRenderer *renderer = display->renderer;
+  CoglRendererEGL *egl_renderer = renderer->winsys;
+  CoglRendererWayland *wayland_renderer = egl_renderer->platform;
+
+  *poll_fds = &wayland_renderer->poll_fd;
+  *n_poll_fds = 1;
+  *timeout = -1;
+}
+
+static void
+_cogl_winsys_poll_dispatch (CoglContext *context,
+                            const CoglPollFD *poll_fds,
+                            int n_poll_fds)
+{
+  CoglDisplay *display = context->display;
+  CoglRenderer *renderer = display->renderer;
+  CoglRendererEGL *egl_renderer = renderer->winsys;
+  CoglRendererWayland *wayland_renderer = egl_renderer->platform;
+  int i;
+
+  for (i = 0; i < n_poll_fds; i++)
+    if (poll_fds[i].fd == wayland_renderer->poll_fd.fd)
+      {
+        if (poll_fds[i].revents & COGL_POLL_FD_EVENT_IN)
+          wl_display_dispatch (wayland_renderer->wayland_display);
+        break;
+      }
+}
+
 static const CoglWinsysEGLVtable
 _cogl_winsys_egl_vtable =
   {
@@ -599,6 +640,9 @@ _cogl_winsys_egl_wayland_get_vtable (void)
 
       vtable.onscreen_swap_buffers = _cogl_winsys_onscreen_swap_buffers;
 
+      vtable.poll_get_info = _cogl_winsys_poll_get_info;
+      vtable.poll_dispatch = _cogl_winsys_poll_dispatch;
+
       vtable_inited = TRUE;
     }