src/mesa/x86/clip_args.h

   1 /* $Id: clip_args.h,v 1.3 2001/03/28 20:44:43 gareth Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.5
   6  *
   7  * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  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:
  15  *
  16  * The above copyright notice and this permission notice shall be included
  17  * in all copies or substantial portions of the Software.
  18  *
  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
  22  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  23  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27 /*
  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.
  31  *
  32  * Gareth Hughes <gareth@valinux.com>
  33  */
  34
  35 #ifndef __CLIP_ARGS_H__
  36 #define __CLIP_ARGS_H__
  37
  38 /*
  39  * Offsets for clip_func arguments
  40  *
  41  * typedef GLvector4f *(*clip_func)( GLvector4f *vClip,
  42  *                                   GLvector4f *vProj,
  43  *                                   GLubyte clipMask[],
  44  *                                   GLubyte *orMask,
  45  *                                   GLubyte *andMask );
  46  */
  47
  48 #define OFFSET_SOURCE   4
  49 #define OFFSET_DEST     8
  50 #define OFFSET_CLIP     12
  51 #define OFFSET_OR       16
  52 #define OFFSET_AND      20
  53
  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)
  59
  60 #endif