From b47836225185c8d2e2ccf3e191230304709d0a57 Mon Sep 17 00:00:00 2001
From: José Fonseca <jrfonseca@tungstengraphics.com>
Date: Fri, 23 Nov 2007 17:22:54 +0000
Subject: gallium: Reusable pipe buffer library.

This is an optional library that winsys drivers can use to simplify memory
management, and help meet the winsys interface requirements.
---
 src/mesa/pipe/pipebuffer/pb_buffer_client.c | 123 ++++++++++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 src/mesa/pipe/pipebuffer/pb_buffer_client.c

(limited to 'src/mesa/pipe/pipebuffer/pb_buffer_client.c')

diff --git a/src/mesa/pipe/pipebuffer/pb_buffer_client.c b/src/mesa/pipe/pipebuffer/pb_buffer_client.c
new file mode 100644
index 0000000000..bb7f5a9a94
--- /dev/null
+++ b/src/mesa/pipe/pipebuffer/pb_buffer_client.c
@@ -0,0 +1,123 @@
+/**************************************************************************
+ *
+ * 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 José Fonseca <jrfonseca@tungstengraphics.com>
+ */
+
+
+#include "pb_buffer.h"
+
+
+struct client_buffer 
+{
+   struct pipe_buffer base;
+   void *data;
+};
+
+
+extern const struct pipe_buffer_vtbl client_buffer_vtbl;
+
+
+static inline struct client_buffer *
+client_buffer(struct pipe_buffer *buf)
+{
+   assert(buf);
+   assert(buf->vtbl == &client_buffer_vtbl);
+   return (struct client_buffer *)buf;
+}
+
+
+static void
+client_buffer_reference(struct pipe_buffer *buf)
+{
+   /* No-op */
+}
+
+
+static void
+client_buffer_release(struct pipe_buffer *buf)
+{
+   assert(buf);
+   free(buf);
+}
+
+
+static void *
+client_buffer_map(struct pipe_buffer *buf, 
+                  unsigned flags)
+{
+   return client_buffer(buf)->data;
+}
+
+
+static void
+client_buffer_unmap(struct pipe_buffer *buf)
+{
+   /* No-op */
+}
+
+
+static void
+client_buffer_get_base_buffer(struct pipe_buffer *buf,
+                              struct pipe_buffer **base_buf,
+                              unsigned *offset)
+{
+   *base_buf = buf;
+   *offset = 0;
+}
+
+
+const struct pipe_buffer_vtbl 
+client_buffer_vtbl = {
+      client_buffer_reference,
+      client_buffer_release,
+      client_buffer_map,
+      client_buffer_unmap,
+      client_buffer_get_base_buffer
+};
+
+
+struct pipe_buffer *
+client_buffer_create(void *data) 
+{
+   struct client_buffer *buf;
+   
+   buf = (struct client_buffer *)malloc(sizeof(struct client_buffer));
+   if(!buf)
+      return NULL;
+   
+   buf->base.vtbl = &client_buffer_vtbl;
+   
+   buf->data = data;
+   
+   return &buf->base;
+}
-- 
cgit v1.2.3