gallium: unify transfer functions

"get_transfer + transfer_map" becomes "transfer_map".
"transfer_unmap + transfer_destroy" becomes "transfer_unmap".

transfer_map must create and return the transfer object and transfer_unmap
must destroy it.

transfer_map is successful if the returned buffer pointer is not NULL.
If transfer_map fails, the pointer to the transfer object remains unchanged
(i.e. doesn't have to be NULL).

Acked-by: Brian Paul <brianp@vmware.com>

1 files changed, 7 insertions, 16 deletions

diff --git a/src/gallium/state_trackers/glx/xlib/xm_api.c b/src/gallium/state_trackers/glx/xlib/xm_api.c
index 7e91556..607584f 100644
--- a/src/gallium/state_trackers/glx/xlib/xm_api.c
+++ b/src/gallium/state_trackers/glx/xlib/xm_api.c
@@ -1368,12 +1368,12 @@ XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer,
 
       internal_format = choose_pixel_format(drawable->xm_visual);
 
-      tex_xfer = pipe_get_transfer(pipe, res,
-                                   0, 0,    /* level, layer */
-                                   PIPE_TRANSFER_WRITE,
-                                   x, y,
-                                   w, h);
-      if (!tex_xfer)
+      map = pipe_transfer_map(pipe, res,
+                              0, 0,    /* level, layer */
+                              PIPE_TRANSFER_WRITE,
+                              x, y,
+                              w, h, &tex_xfer);
+      if (!map)
          return;
 
       /* Grab the XImage that we want to turn into a texture. */
@@ -1385,14 +1385,7 @@ XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer,
                       ZPixmap);
 
       if (!img) {
-         pipe_transfer_destroy(pipe, tex_xfer);
-         return;
-      }
-
-      map = pipe_transfer_map(pipe, tex_xfer);
-
-      if (!map) {
-         pipe_transfer_destroy(pipe, tex_xfer);
+         pipe_transfer_unmap(pipe, tex_xfer);
          return;
       }
 
@@ -1407,8 +1400,6 @@ XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer,
 
       pipe_transfer_unmap(pipe, tex_xfer);
 
-      pipe_transfer_destroy(pipe, tex_xfer);
-
       st->teximage(st,
                    ST_TEXTURE_2D,
                    0,    /* level */