evas: add a snapshot bool to Evas_Object_Image.

Snapshot object are rendering the content of the canvas below them into them.
They can then be used for filter, map or proxy.

Have fun !

3 files changed, 45 insertions, 1 deletions

diff --git a/src/lib/evas/canvas/evas_image.eo b/src/lib/evas/canvas/evas_image.eo
index cec824ab24..8e0ac82d81 100644
--- a/src/lib/evas/canvas/evas_image.eo
+++ b/src/lib/evas/canvas/evas_image.eo
@@ -784,6 +784,28 @@ class Evas.Image (Evas.Object, Efl.File, Efl.Image, Efl.Gfx.Fill, Efl.Gfx.View,
             Default is #EVAS_IMAGE_ORIENT_NONE. */
          }
       }
+      @property snapshot {
+         set {
+            /*@
+            The content below the Evas_Object_Image will be rendered inside it and
+            you can reuse it as a source for any kind of effect.
+
+            @since 1.15
+            */
+	 }
+	 get {
+            /*@
+	    Determine wether the Evas_Object_Image replicate the content of the
+	    canvas below.
+
+	    @return @c EINA_TRUE if it does, @c EINA_FALSE if it doesn't.
+	    @since 1.15
+            */
+	 }
+	 values {
+	    s: bool; /*@ Wether to put the content of the canvas below inside the Evas_Object_Image. */
+	 }
+      }
       preload_begin {
          /*@ Begin preloading an image object's image data in the background */
          legacy: null;
diff --git a/src/lib/evas/canvas/evas_object_image.c b/src/lib/evas/canvas/evas_object_image.c
index 7134783111..30797e8d0c 100644
--- a/src/lib/evas/canvas/evas_object_image.c
+++ b/src/lib/evas/canvas/evas_object_image.c
@@ -4705,7 +4705,25 @@ _evas_object_image_video_overlay_do(Evas_Object *eo_obj)
    o->delayed.video_hide = EINA_FALSE;
 }
 
-/* vim:set ts=8 sw=3 sts=3 expandtab cino=>5n-2f0^-2{2(0W1st0 :*/
+static void
+_evas_image_snapshot_set(Eo *eo, Evas_Image_Data *pd EINA_UNUSED, Eina_Bool s)
+{
+   Evas_Object_Protected_Data *obj = eo_data_scope_get(eo, EVAS_OBJECT_CLASS);
+
+   if (obj->cur->snapshot == s) return ;
+
+   EINA_COW_STATE_WRITE_BEGIN(obj, state_write, cur)
+     state_write->snapshot = !!s;
+   EINA_COW_STATE_WRITE_END(obj, state_write, cur);
+}
+
+static Eina_Bool
+_evas_image_snapshot_get(Eo *eo, Evas_Image_Data *pd EINA_UNUSED)
+{
+   Evas_Object_Protected_Data *obj = eo_data_scope_get(eo, EVAS_OBJECT_CLASS);
+
+   return obj->cur->snapshot;
+}
 
 EAPI void
 evas_object_image_file_set(Eo *obj, const char *file, const char *key)
@@ -4778,3 +4796,5 @@ _evas_image_efl_gfx_filter_program_set(Eo *obj, Evas_Image_Data *pd EINA_UNUSED,
 }
 
 #include "canvas/evas_image.eo.c"
+
+/* vim:set ts=8 sw=3 sts=3 expandtab cino=>5n-2f0^-2{2(0W1st0 :*/
diff --git a/src/lib/evas/include/evas_private.h b/src/lib/evas/include/evas_private.h
index 24f70cd9cc..18380363dd 100644
--- a/src/lib/evas/include/evas_private.h
+++ b/src/lib/evas/include/evas_private.h
@@ -808,6 +808,7 @@ struct _Evas_Public_Data
    Eina_Array     pending_objects;
    Eina_Array     obscuring_objects;
    Eina_Array     temporary_objects;
+   Eina_Array     snapshot_objects;
    Eina_Array     clip_changes;
    Eina_Array     scie_unref_queue;
    Eina_Array     image_unref_queue;
@@ -1004,6 +1005,7 @@ struct _Evas_Object_Protected_State
 
    Eina_Bool             cached_surface : 1;
    Eina_Bool             parent_cached_surface : 1;
+   Eina_Bool             snapshot : 1;
 };
 
 struct _Evas_Object_Protected_Data