light.h revision d1b79672425115b0f6f9fc3aadcf3800f5f3a7dc 
1/*
2 * Mesa 3-D graphics library
3 * Version:  7.5
4 *
5 * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
6 * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
21 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
22 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26
27#ifndef LIGHT_H
28#define LIGHT_H
29
30
31#include "glheader.h"
32#include "mfeatures.h"
33
34struct gl_context;
35struct gl_light;
36struct gl_material;
37
38extern void GLAPIENTRY
39_mesa_ShadeModel( GLenum mode );
40
41extern void GLAPIENTRY
42_mesa_ProvokingVertexEXT(GLenum mode);
43
44
45#if _HAVE_FULL_GL
46extern void GLAPIENTRY
47_mesa_ColorMaterial( GLenum face, GLenum mode );
48
49extern void GLAPIENTRY
50_mesa_Lightf( GLenum light, GLenum pname, GLfloat param );
51
52extern void GLAPIENTRY
53_mesa_Lightfv( GLenum light, GLenum pname, const GLfloat *params );
54
55extern void GLAPIENTRY
56_mesa_Lightiv( GLenum light, GLenum pname, const GLint *params );
57
58extern void GLAPIENTRY
59_mesa_Lighti( GLenum light, GLenum pname, GLint param );
60
61extern void GLAPIENTRY
62_mesa_LightModelf( GLenum pname, GLfloat param );
63
64extern void GLAPIENTRY
65_mesa_LightModelfv( GLenum pname, const GLfloat *params );
66
67extern void GLAPIENTRY
68_mesa_LightModeli( GLenum pname, GLint param );
69
70extern void GLAPIENTRY
71_mesa_LightModeliv( GLenum pname, const GLint *params );
72
73extern void GLAPIENTRY
74_mesa_GetLightfv( GLenum light, GLenum pname, GLfloat *params );
75
76extern void GLAPIENTRY
77_mesa_GetLightiv( GLenum light, GLenum pname, GLint *params );
78
79extern void GLAPIENTRY
80_mesa_GetMaterialfv( GLenum face, GLenum pname, GLfloat *params );
81
82extern void GLAPIENTRY
83_mesa_GetMaterialiv( GLenum face, GLenum pname, GLint *params );
84
85
86extern void
87_mesa_light(struct gl_context *ctx, GLuint lnum, GLenum pname, const GLfloat *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 * Result should be a GLfloat.
94 */
95#define GET_SHINE_TAB_ENTRY( table, dp, result )			\
96do {									\
97   struct gl_shine_tab *_tab = table;					\
98   float f = (dp * (SHINE_TABLE_SIZE-1));				\
99   int k = (int) f;							\
100   if (k < 0 /* gcc may cast an overflow float value to negative int value*/ \
101	|| k > SHINE_TABLE_SIZE-2)					\
102      result = (GLfloat) pow( dp, _tab->shininess );		\
103   else									\
104      result = _tab->tab[k] + (f-k)*(_tab->tab[k+1]-_tab->tab[k]);	\
105} while (0)
106
107
108extern GLuint _mesa_material_bitmask( struct gl_context *ctx,
109                                      GLenum face, GLenum pname,
110                                      GLuint legal,
111                                      const char * );
112
113extern void _mesa_validate_all_lighting_tables( struct gl_context *ctx );
114
115extern void _mesa_update_lighting( struct gl_context *ctx );
116
117extern void _mesa_update_tnl_spaces( struct gl_context *ctx, GLuint new_state );
118
119extern void _mesa_update_material( struct gl_context *ctx,
120                                   GLuint bitmask );
121
122extern void _mesa_update_color_material( struct gl_context *ctx,
123                                         const GLfloat rgba[4] );
124
125extern void _mesa_init_lighting( struct gl_context *ctx );
126
127extern void _mesa_free_lighting_data( struct gl_context *ctx );
128
129extern void _mesa_allow_light_in_model( struct gl_context *ctx, GLboolean flag );
130
131#else
132#define _mesa_update_color_material( c, r ) ((void)0)
133#define _mesa_validate_all_lighting_tables( c ) ((void)0)
134#define _mesa_material_bitmask( c, f, p, l, s ) 0
135#define _mesa_init_lighting( c ) ((void)0)
136#define _mesa_free_lighting_data( c ) ((void)0)
137#define _mesa_update_lighting( c ) ((void)0)
138#define _mesa_update_tnl_spaces( c, n ) ((void)0)
139#define GET_SHINE_TAB_ENTRY( table, dp, result )  ((result)=0)
140#endif
141
142#endif
143