light.h revision f9995b30756140724f41daf963fa06167912be7f
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 "mtypes.h" 32 33extern void GLAPIENTRY 34_mesa_ShadeModel( GLenum mode ); 35 36extern void GLAPIENTRY 37_mesa_ProvokingVertexEXT(GLenum mode); 38 39 40#if _HAVE_FULL_GL 41extern void GLAPIENTRY 42_mesa_ColorMaterial( GLenum face, GLenum mode ); 43 44extern void GLAPIENTRY 45_mesa_Lightf( GLenum light, GLenum pname, GLfloat param ); 46 47extern void GLAPIENTRY 48_mesa_Lightfv( GLenum light, GLenum pname, const GLfloat *params ); 49 50extern void GLAPIENTRY 51_mesa_Lightiv( GLenum light, GLenum pname, const GLint *params ); 52 53extern void GLAPIENTRY 54_mesa_Lighti( GLenum light, GLenum pname, GLint param ); 55 56extern void GLAPIENTRY 57_mesa_LightModelf( GLenum pname, GLfloat param ); 58 59extern void GLAPIENTRY 60_mesa_LightModelfv( GLenum pname, const GLfloat *params ); 61 62extern void GLAPIENTRY 63_mesa_LightModeli( GLenum pname, GLint param ); 64 65extern void GLAPIENTRY 66_mesa_LightModeliv( GLenum pname, const GLint *params ); 67 68extern void GLAPIENTRY 69_mesa_GetLightfv( GLenum light, GLenum pname, GLfloat *params ); 70 71extern void GLAPIENTRY 72_mesa_GetLightiv( GLenum light, GLenum pname, GLint *params ); 73 74extern void GLAPIENTRY 75_mesa_GetMaterialfv( GLenum face, GLenum pname, GLfloat *params ); 76 77extern void GLAPIENTRY 78_mesa_GetMaterialiv( GLenum face, GLenum pname, GLint *params ); 79 80 81extern void 82_mesa_light(struct gl_context *ctx, GLuint lnum, GLenum pname, const GLfloat *params); 83 84 85/* Lerp between adjacent values in the f(x) lookup table, giving a 86 * continuous function, with adequeate overall accuracy. (Though 87 * still pretty good compared to a straight lookup). 88 * Result should be a GLfloat. 89 */ 90#define GET_SHINE_TAB_ENTRY( table, dp, result ) \ 91do { \ 92 struct gl_shine_tab *_tab = table; \ 93 float f = (dp * (SHINE_TABLE_SIZE-1)); \ 94 int k = (int) f; \ 95 if (k < 0 /* gcc may cast an overflow float value to negative int value*/ \ 96 || k > SHINE_TABLE_SIZE-2) \ 97 result = (GLfloat) pow( dp, _tab->shininess ); \ 98 else \ 99 result = _tab->tab[k] + (f-k)*(_tab->tab[k+1]-_tab->tab[k]); \ 100} while (0) 101 102 103extern GLuint _mesa_material_bitmask( struct gl_context *ctx, 104 GLenum face, GLenum pname, 105 GLuint legal, 106 const char * ); 107 108extern void _mesa_invalidate_spot_exp_table( struct gl_light *l ); 109 110extern void _mesa_invalidate_shine_table( struct gl_context *ctx, GLuint i ); 111 112extern void _mesa_validate_all_lighting_tables( struct gl_context *ctx ); 113 114extern void _mesa_update_lighting( struct gl_context *ctx ); 115 116extern void _mesa_update_tnl_spaces( struct gl_context *ctx, GLuint new_state ); 117 118extern void _mesa_update_material( struct gl_context *ctx, 119 GLuint bitmask ); 120 121extern void _mesa_copy_materials( struct gl_material *dst, 122 const struct gl_material *src, 123 GLuint bitmask ); 124 125extern void _mesa_update_color_material( struct gl_context *ctx, 126 const GLfloat rgba[4] ); 127 128extern void _mesa_init_lighting( struct gl_context *ctx ); 129 130extern void _mesa_free_lighting_data( struct gl_context *ctx ); 131 132extern void _mesa_allow_light_in_model( struct gl_context *ctx, GLboolean flag ); 133 134#else 135#define _mesa_update_color_material( c, r ) ((void)0) 136#define _mesa_validate_all_lighting_tables( c ) ((void)0) 137#define _mesa_invalidate_spot_exp_table( l ) ((void)0) 138#define _mesa_material_bitmask( c, f, p, l, s ) 0 139#define _mesa_init_lighting( c ) ((void)0) 140#define _mesa_free_lighting_data( c ) ((void)0) 141#define _mesa_update_lighting( c ) ((void)0) 142#define _mesa_update_tnl_spaces( c, n ) ((void)0) 143#define GET_SHINE_TAB_ENTRY( table, dp, result ) ((result)=0) 144#endif 145 146#endif 147