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/* $Id: clip_args.h,v 1.3 2001/03/28 20:44:43 gareth Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.5
*
* Copyright (C) 1999-2001 Brian Paul 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, sublicense,
* 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 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 NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL 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.
*/
/*
* Clip test function interface for assembly code. Simply define
* FRAME_OFFSET to the number of bytes pushed onto the stack before
* using the ARG_* argument macros.
*
* Gareth Hughes <gareth@valinux.com>
*/
#ifndef __CLIP_ARGS_H__
#define __CLIP_ARGS_H__
/*
* Offsets for clip_func arguments
*
* typedef GLvector4f *(*clip_func)( GLvector4f *vClip,
* GLvector4f *vProj,
* GLubyte clipMask[],
* GLubyte *orMask,
* GLubyte *andMask );
*/
#define OFFSET_SOURCE 4
#define OFFSET_DEST 8
#define OFFSET_CLIP 12
#define OFFSET_OR 16
#define OFFSET_AND 20
#define ARG_SOURCE REGOFF(FRAME_OFFSET+OFFSET_SOURCE, ESP)
#define ARG_DEST REGOFF(FRAME_OFFSET+OFFSET_DEST, ESP)
#define ARG_CLIP REGOFF(FRAME_OFFSET+OFFSET_CLIP, ESP)
#define ARG_OR REGOFF(FRAME_OFFSET+OFFSET_OR, ESP)
#define ARG_AND REGOFF(FRAME_OFFSET+OFFSET_AND, ESP)
#endif
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