1 files changed, 124 insertions, 0 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_surfaces.c b/mesalib/src/gallium/auxiliary/util/u_surfaces.c
new file mode 100644
index 000000000..9a42c9d29
--- /dev/null
+++ b/mesalib/src/gallium/auxiliary/util/u_surfaces.c
@@ -0,0 +1,124 @@
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+#include "u_surfaces.h"
+#include "util/u_hash_table.h"
+#include "util/u_inlines.h"
+#include "util/u_memory.h"
+
+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)
+{
+   struct pipe_surface *ps;
+
+   if(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE)
+   {    /* or 2D array */
+      if(!us->u.hash)
+         us->u.hash = cso_hash_create();
+
+      ps = cso_hash_iter_data(cso_hash_find(us->u.hash, (layer << 8) | level));
+   }
+   else
+   {
+      if(!us->u.array)
+         us->u.array = CALLOC(pt->last_level + 1, sizeof(struct pipe_surface *));
+      ps = us->u.array[level];
+   }
+
+   if(ps && ps->context == ctx)
+   {
+      p_atomic_inc(&ps->reference.count);
+      *res = ps;
+      return FALSE;
+   }
+
+   ps = (struct pipe_surface *)CALLOC(1, surface_struct_size);
+   if(!ps)
+   {
+      *res = NULL;
+      return FALSE;
+   }
+
+   pipe_surface_init(ctx, ps, pt, level, layer, flags);
+
+   if(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE)
+      cso_hash_insert(us->u.hash, (layer << 8) | level, ps);
+   else
+      us->u.array[level] = ps;
+
+   *res = ps;
+   return TRUE;
+}
+
+void
+util_surfaces_do_detach(struct util_surfaces *us, struct pipe_surface *ps)
+{
+   struct pipe_resource *pt = ps->texture;
+   if(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE)
+   {    /* or 2D array */
+      cso_hash_erase(us->u.hash, cso_hash_find(us->u.hash, (ps->u.tex.first_layer << 8) | ps->u.tex.level));
+   }
+   else
+      us->u.array[ps->u.tex.level] = 0;
+}
+
+void
+util_surfaces_destroy(struct util_surfaces *us, struct pipe_resource *pt, void (*destroy_surface) (struct pipe_surface *))
+{
+   if(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE)
+   {    /* or 2D array */
+      if(us->u.hash)
+      {
+         struct cso_hash_iter iter;
+         iter = cso_hash_first_node(us->u.hash);
+         while (!cso_hash_iter_is_null(iter)) {
+            destroy_surface(cso_hash_iter_data(iter));
+            iter = cso_hash_iter_next(iter);
+         }
+
+         cso_hash_delete(us->u.hash);
+         us->u.hash = NULL;
+      }
+   }
+   else
+   {
+      if(us->u.array)
+      {
+         unsigned i;
+         for(i = 0; i <= pt->last_level; ++i)
+         {
+            struct pipe_surface *ps = us->u.array[i];
+            if(ps)
+               destroy_surface(ps);
+         }
+         FREE(us->u.array);
+         us->u.array = NULL;
+      }
+   }
+}