1 files changed, 101 insertions, 0 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_surfaces.h b/mesalib/src/gallium/auxiliary/util/u_surfaces.h
new file mode 100644
index 000000000..2402e8841
--- /dev/null
+++ b/mesalib/src/gallium/auxiliary/util/u_surfaces.h
@@ -0,0 +1,101 @@
+/**************************************************************************
+ *
+ * Copyright 2010 Luca Barbieri
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#ifndef U_SURFACES_H_
+#define U_SURFACES_H_
+
+#include "pipe/p_compiler.h"
+#include "pipe/p_state.h"
+#include "util/u_atomic.h"
+#include "cso_cache/cso_hash.h"
+
+struct util_surfaces
+{
+   union
+   {
+      struct cso_hash *hash;
+      struct pipe_surface **array;
+      void* pv;
+   } u;
+};
+
+/* Return value indicates if the pipe surface result is new */
+boolean
+util_surfaces_do_get(struct util_surfaces *us, unsigned surface_struct_size,
+                     struct pipe_context *ctx, struct pipe_resource *pt,
+                     unsigned level, unsigned layer, unsigned flags,
+                     struct pipe_surface **res);
+
+/* fast inline path for the very common case */
+static INLINE boolean
+util_surfaces_get(struct util_surfaces *us, unsigned surface_struct_size,
+                  struct pipe_context *ctx, struct pipe_resource *pt,
+                  unsigned level, unsigned layer, unsigned flags,
+                  struct pipe_surface **res)
+{
+   if(likely((pt->target == PIPE_TEXTURE_2D || pt->target == PIPE_TEXTURE_RECT) && us->u.array))
+   {
+      struct pipe_surface *ps = us->u.array[level];
+      if(ps && ps->context == ctx)
+      {
+	 p_atomic_inc(&ps->reference.count);
+	 *res = ps;
+	 return FALSE;
+      }
+   }
+
+   return util_surfaces_do_get(us, surface_struct_size, ctx, pt, level, layer, flags, res);
+}
+
+static INLINE struct pipe_surface *
+util_surfaces_peek(struct util_surfaces *us, struct pipe_resource *pt, unsigned level, unsigned layer)
+{
+   if(!us->u.pv)
+      return 0;
+
+   if(unlikely(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE))
+      return cso_hash_iter_data(cso_hash_find(us->u.hash, (layer << 8) | level));
+   else
+      return us->u.array[level];
+}
+
+void util_surfaces_do_detach(struct util_surfaces *us, struct pipe_surface *ps);
+
+static INLINE void
+util_surfaces_detach(struct util_surfaces *us, struct pipe_surface *ps)
+{
+   if(likely(ps->texture->target == PIPE_TEXTURE_2D || ps->texture->target == PIPE_TEXTURE_RECT))
+   {
+      us->u.array[ps->u.tex.level] = 0;
+      return;
+   }
+
+   util_surfaces_do_detach(us, ps);
+}
+
+void util_surfaces_destroy(struct util_surfaces *us, struct pipe_resource *pt, void (*destroy_surface) (struct pipe_surface *));
+
+#endif