Mesa (master): st/mesa: recreate sampler view on context change v3

[Christian König]

Module: Mesa
Branch: master
Commit: 92e543c45da4581b1940178a94e6f2d66c749367
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=92e543c45da4581b1940178a94e6f2d66c749367

Author: Christian König <christian.koenig at amd.com>
Date:   Sat Mar 22 21:30:07 2014 +0100

st/mesa: recreate sampler view on context change v3

With shared glx contexts it is possible that a texture is create and used
in one context and then used in another one resulting in incorrect
sampler view usage.

v2: avoid template copy
v3: add XXX comment

Signed-off-by: Christian König <christian.koenig at amd.com>
Cc: "10.0 10.1" <mesa-stable at lists.freedesktop.org>
Reviewed-by: Brian Paul <brianp at vmware.com>

---

 src/mesa/state_tracker/st_atom_texture.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/mesa/state_tracker/st_atom_texture.c b/src/mesa/state_tracker/st_atom_texture.c
index 3557a3f..75e6fac 100644
--- a/src/mesa/state_tracker/st_atom_texture.c
+++ b/src/mesa/state_tracker/st_atom_texture.c
@@ -198,6 +198,16 @@ st_get_texture_sampler_view_from_stobj(struct st_texture_object *stObj,
    if (!stObj->sampler_view) {
       stObj->sampler_view =
          st_create_texture_sampler_view_from_stobj(pipe, stObj, samp, format);
+
+   } else if (stObj->sampler_view->context != pipe) {
+      /* Recreate view in correct context, use existing view as template */
+      /* XXX: This isn't optimal, we should try to use more than one view.
+              Otherwise we create/destroy the view all the time
+       */
+      struct pipe_sampler_view *sv =
+         pipe->create_sampler_view(pipe, stObj->pt, stObj->sampler_view);
+      pipe_sampler_view_reference(&stObj->sampler_view, NULL);
+      stObj->sampler_view = sv;
    }
 
    return stObj->sampler_view;