evas: implement Efl.File.unload for evas image classes

this fixes unloading images using the evas_object_image_file_set legacy
api

ref D8616

Differential Revision: https://phab.enlightenment.org/D8618

src/lib/evas/canvas/efl_canvas_image.c

@@ -4,6 +4,21 @@
 #define MY_CLASS EFL_CANVAS_IMAGE_CLASS
 #define MY_CLASS_NAME efl_class_name_get(MY_CLASS)
 
+void
+_evas_image_file_unload(Eo *eo_obj)
+{
+   Evas_Object_Protected_Data *obj;
+   Evas_Image_Data *o = efl_data_scope_get(eo_obj, EFL_CANVAS_IMAGE_INTERNAL_CLASS);
+
+   if (!o->cur->f) return;
+
+   obj = efl_data_scope_get(eo_obj, EFL_CANVAS_OBJECT_CLASS);
+   evas_object_async_block(obj);
+   _evas_image_init_set(NULL, NULL, eo_obj, obj, o, NULL);
+   o->buffer_data_set = EINA_FALSE;
+   _evas_image_done_set(eo_obj, obj, o);
+   o->load_error = EFL_GFX_IMAGE_LOAD_ERROR_NONE;
+}
 Eina_Bool
 _evas_image_file_load(Eo *eo_obj)
 {
@@ -48,6 +63,13 @@ _efl_canvas_image_efl_file_load(Eo *eo_obj, void *_pd EINA_UNUSED)
    return EFL_GFX_IMAGE_LOAD_ERROR_DOES_NOT_EXIST;
 }
 
+EOLIAN static void
+_efl_canvas_image_efl_file_unload(Eo *eo_obj, void *_pd EINA_UNUSED)
+{
+   efl_file_unload(efl_super(eo_obj, MY_CLASS));
+   _evas_image_file_unload(eo_obj);
+}
+
 const Eina_File *
 _evas_image_mmap_get(const Eo *eo_obj)
 {

src/lib/evas/canvas/efl_canvas_image.eo

@@ -17,6 +17,7 @@ class @beta Efl.Canvas.Image extends Efl.Canvas.Image_Internal implements
       Efl.Gfx.Buffer.buffer_map;
       Efl.Gfx.Buffer.buffer_unmap;
       Efl.File.load;
+      Efl.File.unload;
       Efl.Gfx.Frame_Controller.animated { get; }
       Efl.Gfx.Frame_Controller.frame { get; set; }
       Efl.Gfx.Frame_Controller.frame_count { get; }

src/lib/evas/canvas/evas_image_eo.c

@@ -15,6 +15,7 @@ _evas_image_class_initializer(Efl_Class *klass)
 
    EFL_OPS_DEFINE(ops,
       EFL_OBJECT_OP_FUNC(efl_file_load, _evas_image_efl_file_load),
+      EFL_OBJECT_OP_FUNC(efl_file_unload, _evas_image_efl_file_unload),
       EVAS_IMAGE_EXTRA_OPS
    );
    opsp = &ops;

src/lib/evas/canvas/evas_image_legacy.c

@@ -1304,4 +1304,12 @@ _evas_image_efl_file_load(Eo *obj, void *pd EINA_UNUSED)
    return EFL_GFX_IMAGE_LOAD_ERROR_DOES_NOT_EXIST;
 }
 
+EOLIAN static void
+_evas_image_efl_file_unload(Eo *obj, void *pd EINA_UNUSED)
+{
+   EVAS_IMAGE_API(obj);
+   efl_file_unload(efl_super(obj, EVAS_IMAGE_CLASS));
+   _evas_image_file_unload(obj);
+}
+
 #include "canvas/evas_image_eo.c"

src/lib/evas/canvas/evas_image_private.h

@@ -162,6 +162,7 @@ void _evas_image_fill_set(Eo *eo_obj, Evas_Image_Data *o, int x, int y, int w, i
 
 /* Efl.File */
 Eina_Bool _evas_image_file_load(Eo *eo_obj);
+void _evas_image_file_unload(Eo *eo_obj);
 const Eina_File *_evas_image_mmap_get(const Eo *eo_obj);
 const char *_evas_image_key_get(const Eo *eo_obj);
 void _efl_canvas_image_load_error_set(Eo *eo_obj EINA_UNUSED, Eina_Error err);

src/lib/evas/canvas/evas_object_image.c

@@ -283,7 +283,9 @@ _evas_image_init_set(const Eina_File *f, const char *key,
           }
         ENFN->image_free(ENC, o->engine_data);
      }
+   o->engine_data = NULL;
    o->load_error = EFL_GFX_IMAGE_LOAD_ERROR_NONE;
+   if (!lo) return;
    lo->emile.scale_down_by = o->load_opts->scale_down_by;
    lo->emile.dpi = o->load_opts->dpi;
    lo->emile.w = o->load_opts->w;