1 files changed, 132 insertions, 0 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_staging.c b/mesalib/src/gallium/auxiliary/util/u_staging.c
new file mode 100644
index 000000000..030ee4718
--- /dev/null
+++ b/mesalib/src/gallium/auxiliary/util/u_staging.c
@@ -0,0 +1,132 @@
+/**************************************************************************
+ *
+ * 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 "util/u_staging.h"
+#include "pipe/p_context.h"
+#include "util/u_memory.h"
+#include "util/u_inlines.h"
+
+static void
+util_staging_resource_template(struct pipe_resource *pt, unsigned width, unsigned height, unsigned depth, struct pipe_resource *template)
+{
+   memset(template, 0, sizeof(struct pipe_resource));
+   if(pt->target != PIPE_BUFFER && depth <= 1)
+      template->target = PIPE_TEXTURE_RECT;
+   else
+      template->target = pt->target;
+   template->format = pt->format;
+   template->width0 = width;
+   template->height0 = height;
+   template->depth0 = depth;
+   template->array_size = 1;
+   template->last_level = 0;
+   template->nr_samples = pt->nr_samples;
+   template->bind = 0;
+   template->usage = PIPE_USAGE_STAGING;
+   template->flags = 0;
+}
+
+struct util_staging_transfer *
+util_staging_transfer_init(struct pipe_context *pipe,
+           struct pipe_resource *pt,
+           unsigned level,
+           unsigned usage,
+           const struct pipe_box *box,
+           bool direct, struct util_staging_transfer *tx)
+{
+   struct pipe_screen *pscreen = pipe->screen;
+
+   struct pipe_resource staging_resource_template;
+
+   pipe_resource_reference(&tx->base.resource, pt);
+   tx->base.level = level;
+   tx->base.usage = usage;
+   tx->base.box = *box;
+
+   if (direct)
+   {
+      tx->staging_resource = pt;
+      return tx;
+   }
+
+   util_staging_resource_template(pt, box->width, box->height, box->depth, &staging_resource_template);
+   tx->staging_resource = pscreen->resource_create(pscreen, &staging_resource_template);
+   if (!tx->staging_resource)
+   {
+      pipe_resource_reference(&tx->base.resource, NULL);
+      FREE(tx);
+      return NULL;
+   }
+
+   if (usage & PIPE_TRANSFER_READ)
+   {
+      /* XXX this looks wrong dst is always the same but looping over src z? */
+      unsigned zi;
+      struct pipe_box sbox;
+      sbox.x = box->x;
+      sbox.y = box->y;
+      sbox.z = box->z;
+      sbox.width = box->width;
+      sbox.height = box->height;
+      sbox.depth = 1;
+      for(zi = 0; zi < box->depth; ++zi) {
+         sbox.z = sbox.z + zi;
+         pipe->resource_copy_region(pipe, tx->staging_resource, 0, 0, 0, 0,
+                                    tx->base.resource, level, &sbox);
+      }
+   }
+
+   return tx;
+}
+
+void
+util_staging_transfer_destroy(struct pipe_context *pipe, struct pipe_transfer *ptx)
+{
+   struct util_staging_transfer *tx = (struct util_staging_transfer *)ptx;
+
+   if (tx->staging_resource != tx->base.resource)
+   {
+      if(tx->base.usage & PIPE_TRANSFER_WRITE) {
+         /* XXX this looks wrong src is always the same but looping over dst z? */
+         unsigned zi;
+         struct pipe_box sbox;
+         sbox.x = 0;
+         sbox.y = 0;
+         sbox.z = 0;
+         sbox.width = tx->base.box.width;
+         sbox.height = tx->base.box.height;
+         sbox.depth = 1;
+         for(zi = 0; zi < tx->base.box.depth; ++zi)
+            pipe->resource_copy_region(pipe, tx->base.resource, tx->base.level, tx->base.box.x, tx->base.box.y, tx->base.box.z + zi,
+                                       tx->staging_resource, 0, &sbox);
+      }
+
+      pipe_resource_reference(&tx->staging_resource, NULL);
+   }
+
+   pipe_resource_reference(&ptx->resource, NULL);
+   FREE(ptx);
+}