Add pipe buffer managment functions.

[mesa.git] / src / mesa / state_tracker / st_cb_bufferobjects.h

diff --git a/src/mesa/state_tracker/st_cb_bufferobjects.h b/src/mesa/state_tracker/st_cb_bufferobjects.h
new file mode 100644 (file)
index 0000000..2787411
--- /dev/null
+++ b/src/mesa/state_tracker/st_cb_bufferobjects.h
@@ -0,0 +1,66 @@
+ /**************************************************************************
+ * 
+ * Copyright 2005 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.
+ * 
+ **************************************************************************/
+
+#ifndef ST_CB_BUFFEROBJECTS_H
+#define ST_CB_BUFFEROBJECTS_H
+
+struct st_context;
+struct gl_buffer_object;
+struct pipe_buffer_handle;
+
+/**
+ * State_tracker vertex/pixel buffer object, derived from Mesa's
+ * gl_buffer_object.
+ */
+struct st_buffer_object
+{
+   struct gl_buffer_object Base;
+   struct pipe_buffer_handle *buffer;  
+};
+
+
+/* Hook the bufferobject implementation into mesa: 
+ */
+void st_init_cb_bufferobjects( struct st_context *st );
+
+
+/* Are the obj->Name tests necessary?  Unfortunately yes, mesa
+ * allocates a couple of gl_buffer_object structs statically, and the
+ * Name == 0 test is the only way to identify them and avoid casting
+ * them erroneously to our structs.
+ */
+static INLINE struct st_buffer_object *
+st_buffer_object(struct gl_buffer_object *obj)
+{
+   if (obj->Name)
+      return (struct st_buffer_object *) obj;
+   else
+      return NULL;
+}
+
+
+#endif