svn merge ^/branches/released .

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diff --git a/mesalib/src/gallium/auxiliary/util/u_simple_screen.h b/mesalib/src/gallium/auxiliary/util/u_simple_screen.h
new file mode 100644
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+++ b/mesalib/src/gallium/auxiliary/util/u_simple_screen.h
@@ -0,0 +1,180 @@
+/**************************************************************************

+ *

+ * Copyright 2009 VMware, Inc.

+ * 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 U_SIMPLE_SCREEN_H

+#define U_SIMPLE_SCREEN_H

+

+#include "pipe/p_format.h"

+

+struct pipe_screen;

+struct pipe_fence_handle;

+struct pipe_surface;

+struct pipe_resource;

+

+/**

+ * Gallium3D 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 pipe_winsys

+{

+   void (*destroy)( struct pipe_winsys *ws );

+

+   /** Returns name of this winsys interface */

+   const char *(*get_name)( struct pipe_winsys *ws );

+

+   /**

+    * Do any special operations to ensure frontbuffer contents are

+    * displayed, eg copy fake frontbuffer.

+    */

+   void (*flush_frontbuffer)( struct pipe_winsys *ws,

+                              struct pipe_resource *resource,

+                              unsigned level, unsigned layer,

+                              void *context_private );

+

+

+   /**

+    * Buffer management. Buffer attributes are mostly fixed over its lifetime.

+    *

+    * Remember that gallium gets to choose the interface it needs, and the

+    * window systems must then implement that interface (rather than the

+    * other way around...).

+    *

+    * usage is a bitmask of PIPE_BIND_*.

+    * All possible usages must be present.

+    *

+    * alignment indicates the client's alignment requirements, eg for

+    * SSE instructions.

+    */

+   struct pipe_resource *(*buffer_create)( struct pipe_winsys *ws,

+                                         unsigned alignment,

+                                         unsigned usage,

+                                         unsigned size );

+

+   /**

+    * Create a buffer that wraps user-space data.

+    *

+    * Effectively this schedules a delayed call to buffer_create

+    * followed by an upload of the data at *some point in the future*,

+    * or perhaps never.  Basically the allocate/upload is delayed

+    * until the buffer is actually passed to hardware.

+    *

+    * The intention is to provide a quick way to turn regular data

+    * into a buffer, and secondly to avoid a copy operation if that

+    * data subsequently turns out to be only accessed by the CPU.

+    *

+    * Common example is OpenGL vertex buffers that are subsequently

+    * processed either by software TNL in the driver or by passing to

+    * hardware.

+    *

+    * XXX: What happens if the delayed call to buffer_create() fails?

+    *

+    * Note that ptr may be accessed at any time upto the time when the

+    * buffer is destroyed, so the data must not be freed before then.

+    */

+   struct pipe_resource *(*user_buffer_create)(struct pipe_winsys *ws,

+                                                    void *ptr,

+                                                    unsigned bytes);

+

+   /**

+    * Allocate storage for a display target surface.

+    *

+    * Often surfaces which are meant to be blitted to the front screen (i.e.,

+    * display targets) must be allocated with special characteristics, memory

+    * pools, or obtained directly from the windowing system.

+    *

+    * This callback is invoked by the pipe_screen when creating a texture marked

+    * with the PIPE_BIND_DISPLAY_TARGET flag  to get the underlying

+    * buffer storage.

+    */

+   struct pipe_resource *(*surface_buffer_create)(struct pipe_winsys *ws,

+                                                unsigned width, unsigned height,

+                                                enum pipe_format format,

+                                                unsigned usage,

+                                                unsigned tex_usage,

+                                                unsigned *stride);

+

+

+   /**

+    * Map the entire data store of a buffer object into the client's address.

+    * flags is bitmask of PIPE_BUFFER_USAGE_CPU_READ/WRITE flags.

+    */

+   void *(*buffer_map)( struct pipe_winsys *ws,

+                        struct pipe_resource *buf,

+                        unsigned usage );

+

+   void (*buffer_unmap)( struct pipe_winsys *ws,

+                         struct pipe_resource *buf );

+

+   void (*buffer_destroy)( struct pipe_resource *buf );

+

+

+   /** Set ptr = fence, with reference counting */

+   void (*fence_reference)( struct pipe_winsys *ws,

+                            struct pipe_fence_handle **ptr,

+                            struct pipe_fence_handle *fence );

+

+   /**

+    * Checks whether the fence has been signalled.

+    * \param flags  driver-specific meaning

+    * \return zero on success.

+    */

+   int (*fence_signalled)( struct pipe_winsys *ws,

+                           struct pipe_fence_handle *fence,

+                           unsigned flag );

+

+   /**

+    * Wait for the fence to finish.

+    * \param flags  driver-specific meaning

+    * \return zero on success.

+    */

+   int (*fence_finish)( struct pipe_winsys *ws,

+                        struct pipe_fence_handle *fence,

+                        unsigned flags,

+                        uint64_t timeout );

+

+};

+

+/**

+ * The following function initializes a simple passthrough screen.

+ *

+ * All the relevant screen function pointers will forwarded to the

+ * winsys.

+ */

+void u_simple_screen_init(struct pipe_screen *screen);

+

+/**

+ * Returns the name of the winsys associated with this screen.

+ */

+const char* u_simple_screen_winsys_name(struct pipe_screen *screen);

+

+#endif