light.h revision 23caf20169ac38436ee9c13914f1d6aa7cf6bb5e 
1/* $Id: light.h,v 1.5 2000/11/16 21:05:35 keithw Exp $ */
2
3/*
4 * Mesa 3-D graphics library
5 * Version:  3.5
6 *
7 * Copyright (C) 1999-2000  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 "types.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_Materialf( GLenum face, GLenum pname, GLfloat param );
67
68extern void
69_mesa_Materialfv( GLenum face, GLenum pname, const GLfloat *params );
70
71extern void
72_mesa_Materiali( GLenum face, GLenum pname, GLint param );
73
74extern void
75_mesa_Materialiv( GLenum face, GLenum pname, const GLint *params );
76
77extern void
78_mesa_GetLightfv( GLenum light, GLenum pname, GLfloat *params );
79
80extern void
81_mesa_GetLightiv( GLenum light, GLenum pname, GLint *params );
82
83extern void
84_mesa_GetMaterialfv( GLenum face, GLenum pname, GLfloat *params );
85
86extern void
87_mesa_GetMaterialiv( GLenum face, GLenum pname, GLint *params );
88
89
90/* Lerp between adjacent values in the f(x) lookup table, giving a
91 * continuous function, with adequeate overall accuracy.  (Though
92 * still pretty good compared to a straight lookup).
93 */
94#define GET_SHINE_TAB_ENTRY( table, dp, result )			\
95do {									\
96   struct gl_shine_tab *_tab = table;					\
97   if (dp>1.0)								\
98      result = pow( dp, _tab->shininess );				\
99   else {								\
100      float f = (dp * (SHINE_TABLE_SIZE-1));				\
101      int k = (int) f;							\
102      result = _tab->tab[k] + (f-k)*(_tab->tab[k+1]-_tab->tab[k]);	\
103   }									\
104} while (0)
105
106
107
108extern GLuint gl_material_bitmask( GLcontext *ctx,
109				   GLenum face, GLenum pname,
110				   GLuint legal,
111				   const char * );
112
113extern void gl_set_material( GLcontext *ctx, GLuint bitmask,
114                             const GLfloat *params);
115
116extern void gl_compute_spot_exp_table( struct gl_light *l );
117
118extern void gl_compute_shine_table( GLcontext *ctx, GLuint i,
119				    GLfloat shininess );
120
121extern void gl_update_lighting( GLcontext *ctx );
122
123extern void gl_compute_light_positions( GLcontext *ctx );
124
125extern void gl_update_material( GLcontext *ctx,
126				const struct gl_material src[2],
127				GLuint bitmask );
128
129extern void gl_update_color_material( GLcontext *ctx, const GLchan rgba[4] );
130
131
132#endif
133
134