Evas GL: Fix render: force pixel_get if dirty

All examples and docs point to using only the dirty flag in
order to trigger a redraw of an Evas GL surface. The commit
21c43528234 broke this behaviour (for a good reason, but not
related to Evas GL).

This is a compatibility fix.

diff --git a/src/lib/evas/canvas/evas_object_image.c b/src/lib/evas/canvas/evas_object_image.c
index b366831..76c1009 100644 (file)
--- a/src/lib/evas/canvas/evas_object_image.c
+++ b/src/lib/evas/canvas/evas_object_image.c
@@ -3751,6 +3751,19 @@ evas_object_image_render_pre(Evas_Object *eo_obj,
              evas_object_render_pre_prev_cur_add(&e->clip_changes, eo_obj, obj);
              if (!o->pixels->pixel_updates) goto done;
           }
+        if (o->dirty_pixels && ENFN->image_native_get)
+          {
+             /* Evas GL surfaces have historically required only the dirty
+              * pixel to trigger a redraw (call to pixels_get). Other kinds
+              * of surfaces must add data update regions. */
+             Evas_Native_Surface *ns;
+             ns = ENFN->image_native_get(ENDT, o->engine_data);
+             if (ns && (ns->type == EVAS_NATIVE_SURFACE_EVASGL))
+               {
+                  evas_object_render_pre_prev_cur_add(&e->clip_changes, eo_obj, obj);
+                  if (!o->pixels->pixel_updates) goto done;
+               }
+          }
         if (o->cur->frame != o->prev->frame)
           {
              evas_object_render_pre_prev_cur_add(&e->clip_changes, eo_obj, obj);