gallium: use a default texture in update_textures(), update_samplers() when needed

The default texture is used when the current fragment shader has texture
sample instructions but the user has not provided/bound a texture.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/mesa/state_tracker/st_context.c b/src/mesa/state_tracker/st_context.c
index 6e4a376d44a..d014ace59fb 100644
--- a/src/mesa/state_tracker/st_context.c
+++ b/src/mesa/state_tracker/st_context.c
@@ -199,6 +199,11 @@ static void st_destroy_context_priv( struct st_context *st )
       }
    }
 
+   if (st->default_texture) {
+      st->ctx->Driver.DeleteTexture(st->ctx, st->default_texture);
+      st->default_texture = NULL;
+   }
+
    free( st );
 }