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/* $Id: xform_args.h,v 1.2 2000/10/23 00:16:29 gareth Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.5
*
* Copyright (C) 1999-2000 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.
*/
/*
* Transform 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 __XFORM_ARGS_H__
#define __XFORM_ARGS_H__
/* Offsets into GLvector4f
*/
#define V4F_DATA 0
#define V4F_START 4
#define V4F_COUNT 8
#define V4F_STRIDE 12
#define V4F_SIZE 16
#define V4F_FLAGS 20
/* GLvector4f flags
*/
#define VEC_SIZE_1 1
#define VEC_SIZE_2 3
#define VEC_SIZE_3 7
#define VEC_SIZE_4 15
/* Offsets for transform_func arguments
*
* typedef void (*transform_func)( GLvector4f *to_vec,
* const GLfloat m[16],
* const GLvector4f *from_vec,
* const GLubyte *clipmask,
* const GLubyte flag );
*/
#define OFFSET_DEST 4
#define OFFSET_MATRIX 8
#define OFFSET_SOURCE 12
#define OFFSET_CLIP 16
#define OFFSET_FLAG 20
#define ARG_DEST REGOFF(FRAME_OFFSET+OFFSET_DEST, ESP)
#define ARG_MATRIX REGOFF(FRAME_OFFSET+OFFSET_MATRIX, ESP)
#define ARG_SOURCE REGOFF(FRAME_OFFSET+OFFSET_SOURCE, ESP)
#define ARG_CLIP REGOFF(FRAME_OFFSET+OFFSET_CLIP, ESP)
#define ARG_FLAG REGOFF(FRAME_OFFSET+OFFSET_FLAG, ESP)
#endif
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