Mesa (master): svga: mark the texture dirty for write transfer map only

[Brian Paul]

Module: Mesa
Branch: master
Commit: 686cd3c606536cff3fe6d80f8ebeeca7afa1b37e
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=686cd3c606536cff3fe6d80f8ebeeca7afa1b37e

Author: Charmaine Lee <charmainel at vmware.com>
Date:   Thu Apr 21 08:28:26 2016 -0700

svga: mark the texture dirty for write transfer map only

Instead of unconditionally mark the texture subresource dirty at transfer map,
we'll set the dirty bit for write transfer only.

Tested with lightsmark2008 and glretrace.

Reviewed-by: Brian Paul <brianp at vmware.com>

---

 src/gallium/drivers/svga/svga_resource_texture.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/gallium/drivers/svga/svga_resource_texture.c b/src/gallium/drivers/svga/svga_resource_texture.c
index ae51228..f176647 100644
--- a/src/gallium/drivers/svga/svga_resource_texture.c
+++ b/src/gallium/drivers/svga/svga_resource_texture.c
@@ -485,8 +485,10 @@ svga_texture_transfer_map(struct pipe_context *pipe,
             }
 	 }
       }
-      /* mark this texture level as dirty */
-      svga_set_texture_dirty(tex, st->slice, transfer->level);
+      if (transfer->usage & PIPE_TRANSFER_WRITE) {
+         /* mark this texture level as dirty */
+         svga_set_texture_dirty(tex, st->slice, transfer->level);
+      }
    }
 
    st->use_direct_map = use_direct_map;