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/**************************************************************************
*
* 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
* This is the interface that i915simple requires any window system
* hosting it to implement. This is the only include file in i915simple
* which is public.
*
*/
#ifndef I915_WINSYS_H
#define I915_WINSYS_H
#include "pipe/p_defines.h"
/* 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 pipe_buffer;
struct pipe_winsys;
struct pipe_screen;
/**
* Additional winsys interface for i915simple.
*
* It is an over-simple batchbuffer mechanism. Will want to improve the
* performance of this, perhaps based on the cmdstream stuff. It
* would be pretty impossible to implement swz on top of this
* interface.
*
* Will also need additions/changes to implement static/dynamic
* indirect state.
*/
struct i915_winsys {
/**
* Reserve space on batch buffer.
*
* Returns a null pointer if there is insufficient space in the batch buffer
* to hold the requested number of dwords and relocations.
*
* The number of dwords should also include the number of relocations.
*/
unsigned *(*batch_start)( struct i915_winsys *sws,
unsigned dwords,
unsigned relocs );
void (*batch_dword)( struct i915_winsys *sws,
unsigned dword );
/**
* Emit a relocation to a buffer.
*
* Used not only when the buffer addresses are not pinned, but also to
* ensure refered buffers will not be destroyed until the current batch
* buffer execution is finished.
*
* The access flags is a combination of I915_BUFFER_ACCESS_WRITE and
* I915_BUFFER_ACCESS_READ macros.
*/
void (*batch_reloc)( struct i915_winsys *sws,
struct pipe_buffer *buf,
unsigned access_flags,
unsigned delta );
void (*batch_flush)( struct i915_winsys *sws );
void (*batch_finish)( struct i915_winsys *sws );
};
#define I915_BUFFER_ACCESS_WRITE 0x1
#define I915_BUFFER_ACCESS_READ 0x2
#define I915_BUFFER_USAGE_LIT_VERTEX (PIPE_BUFFER_USAGE_CUSTOM << 0)
struct pipe_context *i915_create_context( struct pipe_screen *,
struct pipe_winsys *,
struct i915_winsys * );
#endif
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