1 /* $Id: clip_args.h,v 1.5 2002/10/29 20:28:57 brianp Exp $ */
4 * Mesa 3-D graphics library
7 * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
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10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
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13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
16 * The above copyright notice and this permission notice shall be included
17 * in all copies or substantial portions of the Software.
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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28 * Clip test function interface for assembly code. Simply define
29 * FRAME_OFFSET to the number of bytes pushed onto the stack before
30 * using the ARG_* argument macros.
35 #ifndef __CLIP_ARGS_H__
36 #define __CLIP_ARGS_H__
39 * Offsets for clip_func arguments
41 * typedef GLvector4f *(*clip_func)( GLvector4f *clip_vec,
42 * GLvector4f *proj_vec,
48 #define OFFSET_SOURCE 4
50 #define OFFSET_CLIP 12
54 #define ARG_SOURCE REGOFF(FRAME_OFFSET+OFFSET_SOURCE, ESP)
55 #define ARG_DEST REGOFF(FRAME_OFFSET+OFFSET_DEST, ESP)
56 #define ARG_CLIP REGOFF(FRAME_OFFSET+OFFSET_CLIP, ESP)
57 #define ARG_OR REGOFF(FRAME_OFFSET+OFFSET_OR, ESP)
58 #define ARG_AND REGOFF(FRAME_OFFSET+OFFSET_AND, ESP)