1 2 /* 3 * Mesa 3-D graphics library 4 * 5 * Copyright (C) 1999-2001 Brian Paul All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the "Software"), 9 * to deal in the Software without restriction, including without limitation 10 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11 * and/or sell copies of the Software, and to permit persons to whom the 12 * Software is furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included 15 * in all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 23 * OTHER DEALINGS IN THE SOFTWARE. 24 */ 25 26 /* 27 * Clip test function interface for assembly code. Simply define 28 * FRAME_OFFSET to the number of bytes pushed onto the stack before 29 * using the ARG_* argument macros. 30 * 31 * Gareth Hughes 32 */ 33 34 #ifndef __CLIP_ARGS_H__ 35 #define __CLIP_ARGS_H__ 36 37 /* 38 * Offsets for clip_func arguments 39 * 40 * typedef GLvector4f *(*clip_func)( GLvector4f *clip_vec, 41 * GLvector4f *proj_vec, 42 * GLubyte clipMask[], 43 * GLubyte *orMask, 44 * GLubyte *andMask ); 45 */ 46 47 #define OFFSET_SOURCE 4 48 #define OFFSET_DEST 8 49 #define OFFSET_CLIP 12 50 #define OFFSET_OR 16 51 #define OFFSET_AND 20 52 53 #define ARG_SOURCE REGOFF(FRAME_OFFSET+OFFSET_SOURCE, ESP) 54 #define ARG_DEST REGOFF(FRAME_OFFSET+OFFSET_DEST, ESP) 55 #define ARG_CLIP REGOFF(FRAME_OFFSET+OFFSET_CLIP, ESP) 56 #define ARG_OR REGOFF(FRAME_OFFSET+OFFSET_OR, ESP) 57 #define ARG_AND REGOFF(FRAME_OFFSET+OFFSET_AND, ESP) 58 59 #endif 60
