light.h revision 22144ab7552f0799bcfca506bf4ffa7f70a06649 
1/* $Id: light.h,v 1.12 2001/03/12 00:48:38 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#ifndef LIGHT_H
29#define LIGHT_H
30
31
32#include "mtypes.h"
33
34
35extern void
36_mesa_ShadeModel( GLenum mode );
37
38extern void
39_mesa_ColorMaterial( GLenum face, GLenum mode );
40
41extern void
42_mesa_Lightf( GLenum light, GLenum pname, GLfloat param );
43
44extern void
45_mesa_Lightfv( GLenum light, GLenum pname, const GLfloat *params );
46
47extern void
48_mesa_Lightiv( GLenum light, GLenum pname, const GLint *params );
49
50extern void
51_mesa_Lighti( GLenum light, GLenum pname, GLint param );
52
53extern void
54_mesa_LightModelf( GLenum pname, GLfloat param );
55
56extern void
57_mesa_LightModelfv( GLenum pname, const GLfloat *params );
58
59extern void
60_mesa_LightModeli( GLenum pname, GLint param );
61
62extern void
63_mesa_LightModeliv( GLenum pname, const GLint *params );
64
65extern void
66_mesa_GetLightfv( GLenum light, GLenum pname, GLfloat *params );
67
68extern void
69_mesa_GetLightiv( GLenum light, GLenum pname, GLint *params );
70
71extern void
72_mesa_GetMaterialfv( GLenum face, GLenum pname, GLfloat *params );
73
74extern void
75_mesa_GetMaterialiv( GLenum face, GLenum pname, GLint *params );
76
77
78/* Lerp between adjacent values in the f(x) lookup table, giving a
79 * continuous function, with adequeate overall accuracy.  (Though
80 * still pretty good compared to a straight lookup).
81 */
82#define GET_SHINE_TAB_ENTRY( table, dp, result )			\
83do {									\
84   struct gl_shine_tab *_tab = table;					\
85   float f = (dp * (SHINE_TABLE_SIZE-1));				\
86   int k = (int) f;							\
87   if (k > SHINE_TABLE_SIZE-2) 						\
88      result = pow( dp, _tab->shininess );				\
89   else									\
90      result = _tab->tab[k] + (f-k)*(_tab->tab[k+1]-_tab->tab[k]);	\
91} while (0)
92
93
94
95extern GLuint _mesa_material_bitmask( GLcontext *ctx,
96                                      GLenum face, GLenum pname,
97                                      GLuint legal,
98                                      const char * );
99
100extern void _mesa_invalidate_spot_exp_table( struct gl_light *l );
101
102extern void _mesa_invalidate_shine_table( GLcontext *ctx, GLuint i );
103
104extern void _mesa_validate_all_lighting_tables( GLcontext *ctx );
105
106extern void _mesa_update_lighting( GLcontext *ctx );
107
108extern void _mesa_compute_light_positions( GLcontext *ctx );
109
110extern void _mesa_update_material( GLcontext *ctx,
111                                   const struct gl_material src[2],
112                                   GLuint bitmask );
113
114extern void _mesa_copy_material_pairs( struct gl_material dst[2],
115                                       const struct gl_material src[2],
116                                       GLuint bitmask );
117
118extern void _mesa_update_color_material( GLcontext *ctx,
119                                         const GLchan rgba[4] );
120
121
122#endif
123