svga: Add a winsys callback to get the svga_winsys_context

The winsys may need to extract the svga_winsys_context from a
pipe_context. Add a function to enable that functionality.

Cherry-picked from commit e8a8c5e339dfd7a36bb6435fd34175482b9187b8

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/gallium/drivers/svga/svga_context.c b/src/gallium/drivers/svga/svga_context.c
index 75d8afb2ea..3b30b9e341 100644
--- a/src/gallium/drivers/svga/svga_context.c
+++ b/src/gallium/drivers/svga/svga_context.c
@@ -239,3 +239,8 @@ void svga_hwtnl_flush_retry( struct svga_context *svga )
    assert(ret == 0);
 }
 
+struct svga_winsys_context *
+svga_winsys_context( struct pipe_context *pipe )
+{
+   return svga_context( pipe )->swc;
+}