1 files changed, 170 insertions, 0 deletions
diff --git a/src/mesa/pipe/pipebuffer/pb_winsys.c b/src/mesa/pipe/pipebuffer/pb_winsys.c
new file mode 100644
index 00000000000..978944091fd
--- /dev/null
+++ b/src/mesa/pipe/pipebuffer/pb_winsys.c
@@ -0,0 +1,170 @@
+/**************************************************************************
+ *
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS 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.
+ *
+ **************************************************************************/
+
+/**
+ * \file
+ * Implementation of client buffer (also designated as "user buffers"), which
+ * are just state-tracker owned data masqueraded as buffers.
+ * 
+ * \author Jos� Fonseca <[email protected]>
+ */
+
+
+#include "pipe/p_winsys.h"
+#include "pipe/p_util.h"
+
+#include "pb_buffer.h"
+
+
+/**
+ * User buffers are special buffers that initially reference memory
+ * held by the user but which may if necessary copy that memory into
+ * device memory behind the scenes, for submission to hardware.
+ *
+ * These are particularly useful when the referenced data is never
+ * submitted to hardware at all, in the particular case of software
+ * vertex processing.
+ */
+struct pb_user_buffer 
+{
+   struct pb_buffer base;
+   void *data;
+};
+
+
+extern const struct pb_vtbl pb_user_buffer_vtbl;
+
+
+static INLINE struct pb_user_buffer *
+pb_user_buffer(struct pb_buffer *buf)
+{
+   assert(buf);
+   assert(buf->vtbl == &pb_user_buffer_vtbl);
+   return (struct pb_user_buffer *)buf;
+}
+
+
+static void
+pb_user_buffer_destroy(struct pb_buffer *buf)
+{
+   assert(buf);
+   FREE(buf);
+}
+
+
+static void *
+pb_user_buffer_map(struct pb_buffer *buf, 
+                   unsigned flags)
+{
+   return pb_user_buffer(buf)->data;
+}
+
+
+static void
+pb_user_buffer_unmap(struct pb_buffer *buf)
+{
+   /* No-op */
+}
+
+
+static void
+pb_user_buffer_get_base_buffer(struct pb_buffer *buf,
+                               struct pb_buffer **base_buf,
+                               unsigned *offset)
+{
+   *base_buf = buf;
+   *offset = 0;
+}
+
+
+const struct pb_vtbl 
+pb_user_buffer_vtbl = {
+      pb_user_buffer_destroy,
+      pb_user_buffer_map,
+      pb_user_buffer_unmap,
+      pb_user_buffer_get_base_buffer
+};
+
+
+static struct pipe_buffer *
+pb_winsys_user_buffer_create(struct pipe_winsys *winsys,
+                             void *data, 
+                             unsigned bytes) 
+{
+   struct pb_user_buffer *buf = CALLOC_STRUCT(pb_user_buffer);
+
+   if(!buf)
+      return NULL;
+   
+   buf->base.base.refcount = 1;
+   buf->base.base.size = bytes;
+   buf->base.base.alignment = 0;
+   buf->base.base.usage = 0;
+
+   buf->base.vtbl = &pb_user_buffer_vtbl;   
+   buf->data = data;
+   
+   return &buf->base.base;
+}
+
+
+static void *
+pb_winsys_buffer_map(struct pipe_winsys *winsys,
+                     struct pipe_buffer *buf,
+                     unsigned flags)
+{
+   (void)winsys;
+   return pb_map(pb_buffer(buf), flags);
+}
+
+
+static void
+pb_winsys_buffer_unmap(struct pipe_winsys *winsys,
+                       struct pipe_buffer *buf)
+{
+   (void)winsys;
+   pb_unmap(pb_buffer(buf));
+}
+
+
+static void
+pb_winsys_buffer_destroy(struct pipe_winsys *winsys,
+                         struct pipe_buffer *buf)
+{
+   (void)winsys;
+   pb_destroy(pb_buffer(buf));
+}
+
+
+void 
+pb_init_winsys(struct pipe_winsys *winsys)
+{
+   winsys->user_buffer_create = pb_winsys_user_buffer_create;
+   winsys->buffer_map = pb_winsys_buffer_map;
+   winsys->buffer_unmap = pb_winsys_buffer_unmap;
+   winsys->buffer_destroy = pb_winsys_buffer_destroy;
+}