[EGIT] [core/enlightenment] enlightenment-0.19 01/01: fix x11 compositor to use damage events

[Mike Blumenkrantz]

discomfitor pushed a commit to branch enlightenment-0.19.

http://git.enlightenment.org/core/enlightenment.git/commit/?id=258680e60c572ffa5fced996509a5ee5c1bc4689

commit 258680e60c572ffa5fced996509a5ee5c1bc4689
Author: Mike Blumenkrantz <zm...@osg.samsung.com>
Date:   Mon Sep 7 11:10:54 2015 -0400

    fix x11 compositor to use damage events
    
    it seems that since the first version of the enlightenment compositor
    in e17, damage events in x11 have never been used correctly. using
    the event struct members will only give the bounding box/area instead
    of the damaged regions; the real regions must be explicitly fetched
    from the server
    
    this removes the need for a lot of hacks which were added over the years
    to make override windows render correctly, and also probably reduces
    rendering overhead slightly
---
 src/bin/e_comp_x.c | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/src/bin/e_comp_x.c b/src/bin/e_comp_x.c
index 835bd80..60bc35c 100644
--- a/src/bin/e_comp_x.c
+++ b/src/bin/e_comp_x.c
@@ -1461,11 +1461,6 @@ _e_comp_x_configure(void *data EINA_UNUSED, int type 
EINA_UNUSED, Ecore_X_Event_
      {
         e_pixmap_dirty(ec->pixmap);
         evas_object_resize(ec->frame, ev->w, ev->h);
-        if (ec->override && (!ec->input_only))
-          {
-             e_comp_object_damage(ec->frame, 0, 0, ev->w, ev->h);
-             e_comp_object_render_update_del(ec->frame);
-          }
      }
    return ECORE_CALLBACK_RENEW;
 }
@@ -2683,27 +2678,33 @@ static Eina_Bool
 _e_comp_x_damage(void *data EINA_UNUSED, int type EINA_UNUSED, 
Ecore_X_Event_Damage *ev)
 {
    E_Client *ec;
+   Ecore_X_Rectangle *rects;
+   int n = 0;
 
    ec = _e_comp_x_client_find_by_damage(ev->damage);
    if (!ec) return ECORE_CALLBACK_PASS_ON;
    if (ec->comp_data->damage)
      {
         Ecore_X_Region parts;
+        Ecore_X_Rectangle bounds;
 
         parts = ecore_x_region_new(NULL, 0);
         ecore_x_damage_subtract(ec->comp_data->damage, 0, parts);
+        rects = ecore_x_region_fetch(parts, &n, &bounds);
         ecore_x_region_free(parts);
      }
    //WRN("DAMAGE %p: %dx%d", ec, ev->area.width, ev->area.height);
 
+   if (!n) return ECORE_CALLBACK_RENEW;
    if (ec->comp->nocomp)
      e_pixmap_dirty(ec->pixmap);
-   /* discard unwanted xy position of first damage
-    * to avoid wrong composition for override redirect window */
-   else if ((ec->override) && (!ec->comp_data->first_damage))
-     e_comp_object_damage(ec->frame, 0, 0, ev->area.width, ev->area.height);
    else
-     e_comp_object_damage(ec->frame, ev->area.x, ev->area.y, ev->area.width, 
ev->area.height);
+     {
+        int i;
+
+        for (i = 0; i < n; i++)
+          e_comp_object_damage(ec->frame, rects[i].x, rects[i].y, 
rects[i].width, rects[i].height);
+     }
    if ((!ec->re_manage) && (!ec->override) && (!ec->comp_data->first_damage))
      e_comp_object_render_update_del(ec->frame);
    else

--