gallium: Unify reference counting.

The core reference counting code is centralized in p_refcnt.h.

This has some consequences related to struct pipe_buffer:

* The screen member of struct pipe_buffer must be initialized, or
  pipe_buffer_reference() will crash trying to destroy a buffer with reference
  count 0. u_simple_screen takes care of this, but I may have missed some of
  the drivers not using it.
* Except for rare exceptions deep in winsys code, buffers must always be
  allocated via pipe_buffer_create() or via screen->*buffer_create() rather
  than via winsys->*buffer_create().

1 files changed, 2 insertions, 2 deletions

diff --git a/src/gallium/auxiliary/draw/draw_pipe_aaline.c b/src/gallium/auxiliary/draw/draw_pipe_aaline.c
index 80c9c918a9..e83a075794 100644
--- a/src/gallium/auxiliary/draw/draw_pipe_aaline.c
+++ b/src/gallium/auxiliary/draw/draw_pipe_aaline.c
@@ -446,7 +446,7 @@ aaline_create_texture(struct aaline_stage *aaline)
 
       /* unmap */
       screen->transfer_unmap(screen, transfer);
-      screen->tex_transfer_release(screen, &transfer);
+      screen->tex_transfer_destroy(transfer);
    }
    return TRUE;
 }
@@ -728,7 +728,7 @@ aaline_destroy(struct draw_stage *stage)
       aaline->pipe->delete_sampler_state(aaline->pipe, aaline->sampler_cso);
 
    if (aaline->texture)
-      pipe_texture_release(&aaline->texture);
+      pipe_texture_reference(&aaline->texture, NULL);
 
    draw_free_temp_verts( stage );