evas - add a prepare stage for objects before render

preparing an object is a good idea. especially with gl. you want to do
texture uploads BEFORE using textures all in one batch. otherwise this
may mean the gl implementation has to make a copy of your data in a
tmp location then copy it in later when texture becomes "unused" as it
may be in use at the moment, or it may have to stall and wait.

i have seen somewhere around 7-10% speedups on nvidia and intel
drivers with this on given a very special test case i brewed up (1000
32x32 images where i change 1 pixel every frame). this should have
impact really when we are modifying textures a lot. this is all i've
implemented for now, but this should/would/could do much more like
re-order map, proxy renders to render FIRST in a pre-render list
instead of inline and to pre-render fbo/buffer content for complex
objects like text or textblock etc.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/lib/evas/include/evas_private.h b/src/lib/evas/include/evas_private.h
index 65e7023a2c..398109cfd9 100644
--- a/src/lib/evas/include/evas_private.h
+++ b/src/lib/evas/include/evas_private.h
@@ -1289,6 +1289,10 @@ struct _Evas_Object_Func
                            Evas_Coord *x, Evas_Coord *y, Evas_Coord *w, Evas_Coord *h);
 
    int (*can_map) (Evas_Object *obj);
+// new - add to prepare list during render if object needs some pre-render
+// preparation - may include rendering content to buffer or loading data
+// from disk or uploading to texture etc.
+   void (*render_prepare) (Evas_Object *obj, Evas_Object_Protected_Data *pd);
 
 // new render2 functions
 
@@ -1384,6 +1388,8 @@ struct _Evas_Func
    /* new api for direct data set (not put) */
    void *(*image_data_slice_add)           (void *data, void *image, const Eina_Slice *slice, Eina_Bool copy, int w, int h, int stride, Evas_Colorspace space, int plane, Eina_Bool alpha);
 
+   void (*image_prepare)                   (void *data, void *image);
+
    int (*image_native_init)                (void *data, Evas_Native_Surface_Type type);
    void (*image_native_shutdown)           (void *data, Evas_Native_Surface_Type type);
    void *(*image_native_set)               (void *data, void *image, void *native);