Add a new interface between softpipe and the window system / buffer manager.

This interface is defined by softpipe and any window system (eg i915pipe)
wishing to use softpipe is required to implement the interface.
Currently the interface is all about buffer management.

Generalizing, each pipe driver will advertise an interface in a similar
spirit to this, and again any window system driver wishing to use that
rendering pipeline will have to implement the interface it defines.  It
clearly isn't a one-way street however, as softpipe could just do its own
buffer management with malloc.  The interaction with a buffer manager is
desired to allow us to exercise the hardware swapbuffers functionality of
the i915pipe driver, and also to get a feel for the way hardware drivers
which really need a buffer manager will work.

1 files changed, 100 insertions, 0 deletions

diff --git a/src/mesa/pipe/softpipe/sp_winsys.h b/src/mesa/pipe/softpipe/sp_winsys.h
new file mode 100644
index 0000000000..43953c648b
--- /dev/null
+++ b/src/mesa/pipe/softpipe/sp_winsys.h
@@ -0,0 +1,100 @@
+/**************************************************************************
+ * 
+ * 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.
+ * 
+ **************************************************************************/
+
+#ifndef SP_WINSYS_H
+#define SP_WINSYS_H
+
+#include "main/mtypes.h"
+
+/* This is the interface that softpipe requires any window system
+ * hosting it to implement.  This is the only include file in softpipe
+ * which is public.
+ */
+
+
+/* Pipe drivers are (meant to be!) independent of both GL and the
+ * window system.  The window system provides a buffer manager and a
+ * set of additional hooks for things like command buffer submission,
+ * etc.
+ *
+ * There clearly has to be some agreement between the window system
+ * driver and the hardware driver about the format of command buffers,
+ * etc.
+ */
+
+struct softpipe_buffer_handle;
+
+struct softpipe_winsys {
+
+
+   /* The buffer manager is modeled after the dri_bugmgr interface,
+    * but this is the subset that softpipe cares about.  Remember that
+    * softpipe gets to choose the interface it needs, and the window
+    * systems must then implement that interface (rather than the
+    * other way around...).
+    *
+    * Softpipe only really wants to make system memory allocations,
+    * right?? 
+    */
+   struct softpipe_buffer_handle *(*create_buffer)(struct softpipe_winsys *sws, 
+						   const char *name,
+						   unsigned alignment );
+
+   void *(*buffer_map)( struct softpipe_winsys *sws, 
+			struct softpipe_buffer_handle *buf );
+   
+   void (*buffer_unmap)( struct softpipe_winsys *sws, 
+			 struct softpipe_buffer_handle *buf );
+
+   struct softpipe_buffer_handle *(*buffer_reference)( struct softpipe_winsys *sws,
+						       struct softpipe_buffer_handle *buf );
+
+   void (*buffer_unreference)( struct softpipe_winsys *sws, 
+			       struct softpipe_buffer_handle *buf );
+
+   void (*buffer_data)(struct softpipe_winsys *sws, 
+		       struct softpipe_buffer_handle *buf,
+		       unsigned size, const void *data );
+
+   void (*buffer_subdata)(struct softpipe_winsys *sws, 
+			  struct softpipe_buffer_handle *buf,
+			  unsigned long offset, 
+			  unsigned long size, 
+			  const void *data);
+
+   void (*buffer_get_subdata)(struct softpipe_winsys *sws, 
+			      struct softpipe_buffer_handle *buf,
+			      unsigned long offset, 
+			      unsigned long size, 
+			      void *data);
+};
+
+
+struct pipe_context *softpipe_create( struct softpipe_winsys * );
+
+
+#endif /* SP_WINSYS_H */