3 files changed, 51 insertions, 1 deletions

diff --git a/gtk/channel-display.c b/gtk/channel-display.c
index f82df4c..5ae6e34 100644
--- a/gtk/channel-display.c
+++ b/gtk/channel-display.c
@@ -352,6 +352,43 @@ static void spice_display_channel_class_init(SpiceDisplayChannelClass *klass)
     rop3_init();
 }
 
+/**
+ * spice_display_get_primary:
+ * @channel:
+ * @surface_id:
+ * @primary:
+ *
+ * Retrieve primary display surface @surface_id.
+ *
+ * Returns: %TRUE if the primary surface was found and its details
+ * collected in @primary.
+ */
+gboolean spice_display_get_primary(SpiceChannel *channel, guint32 surface_id,
+                                   SpiceDisplayPrimary *primary)
+{
+    g_return_val_if_fail(SPICE_IS_DISPLAY_CHANNEL(channel), FALSE);
+    g_return_val_if_fail(primary != NULL, FALSE);
+
+    SpiceDisplayChannelPrivate *c = SPICE_DISPLAY_CHANNEL(channel)->priv;
+    display_surface *surface = find_surface(c, surface_id);
+
+    if (surface == NULL)
+        return FALSE;
+
+    g_return_val_if_fail(surface->primary, FALSE);
+
+    primary->format = surface->format;
+    primary->width = surface->width;
+    primary->height = surface->height;
+    primary->stride = surface->stride;
+    primary->shmid = surface->shmid;
+    primary->data = surface->data;
+    primary->marked = c->mark;
+    SPICE_DEBUG("get primary %p", primary->data);
+
+    return TRUE;
+}
+
 /* signal trampoline---------------------------------------------------------- */
 
 struct SPICE_DISPLAY_PRIMARY_CREATE {
diff --git a/gtk/channel-display.h b/gtk/channel-display.h
index a31aa54..88e60d9 100644
--- a/gtk/channel-display.h
+++ b/gtk/channel-display.h
@@ -43,6 +43,17 @@ struct _SpiceDisplayMonitorConfig {
     guint height;
 };
 
+typedef struct _SpiceDisplayPrimary SpiceDisplayPrimary;
+struct _SpiceDisplayPrimary {
+    enum SpiceSurfaceFmt format;
+    gint width;
+    gint height;
+    gint stride;
+    gint shmid;
+    guint8 *data;
+    gboolean marked;
+};
+
 /**
  * SpiceDisplayChannel:
  *
@@ -80,10 +91,11 @@ struct _SpiceDisplayChannelClass {
                          gboolean mark);
 
     /*< private >*/
-    /* Do not add fields to this struct */
 };
 
 GType	        spice_display_channel_get_type(void);
+gboolean        spice_display_get_primary(SpiceChannel *channel, guint32 surface_id,
+                                          SpiceDisplayPrimary *primary);
 
 G_END_DECLS
 
diff --git a/gtk/map-file b/gtk/map-file
index 32ead37..c58bab5 100644
--- a/gtk/map-file
+++ b/gtk/map-file
@@ -17,6 +17,7 @@ spice_channel_type_to_string;
 spice_client_error_quark;
 spice_cursor_channel_get_type;
 spice_display_channel_get_type;
+spice_display_get_primary;
 spice_display_copy_to_guest;
 spice_display_get_grab_keys;
 spice_display_get_pixbuf;