src/mesa/main/light.h

   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
  35 extern void
  36 _mesa_ShadeModel( GLenum mode );
  37
  38 extern void
  39 _mesa_ColorMaterial( GLenum face, GLenum mode );
  40
  41 extern void
  42 _mesa_Lightf( GLenum light, GLenum pname, GLfloat param );
  43
  44 extern void
  45 _mesa_Lightfv( GLenum light, GLenum pname, const GLfloat *params );
  46
  47 extern void
  48 _mesa_Lightiv( GLenum light, GLenum pname, const GLint *params );
  49
  50 extern void
  51 _mesa_Lighti( GLenum light, GLenum pname, GLint param );
  52
  53 extern void
  54 _mesa_LightModelf( GLenum pname, GLfloat param );
  55
  56 extern void
  57 _mesa_LightModelfv( GLenum pname, const GLfloat *params );
  58
  59 extern void
  60 _mesa_LightModeli( GLenum pname, GLint param );
  61
  62 extern void
  63 _mesa_LightModeliv( GLenum pname, const GLint *params );
  64
  65 extern void
  66 _mesa_Materialf( GLenum face, GLenum pname, GLfloat param );
  67
  68 extern void
  69 _mesa_Materialfv( GLenum face, GLenum pname, const GLfloat *params );
  70
  71 extern void
  72 _mesa_Materiali( GLenum face, GLenum pname, GLint param );
  73
  74 extern void
  75 _mesa_Materialiv( GLenum face, GLenum pname, const GLint *params );
  76
  77 extern void
  78 _mesa_GetLightfv( GLenum light, GLenum pname, GLfloat *params );
  79
  80 extern void
  81 _mesa_GetLightiv( GLenum light, GLenum pname, GLint *params );
  82
  83 extern void
  84 _mesa_GetMaterialfv( GLenum face, GLenum pname, GLfloat *params );
  85
  86 extern 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 )                        \
  95 do {                                                                    \
  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
 108 extern GLuint gl_material_bitmask( GLcontext *ctx,
 109                                    GLenum face, GLenum pname,
 110                                    GLuint legal,
 111                                    const char * );
 112
 113 extern void gl_set_material( GLcontext *ctx, GLuint bitmask,
 114                              const GLfloat *params);
 115
 116 extern void gl_compute_spot_exp_table( struct gl_light *l );
 117
 118 extern void gl_compute_shine_table( GLcontext *ctx, GLuint i,
 119                                     GLfloat shininess );
 120
 121 extern void gl_update_lighting( GLcontext *ctx );
 122
 123 extern void gl_compute_light_positions( GLcontext *ctx );
 124
 125 extern void gl_update_material( GLcontext *ctx,
 126                                 const struct gl_material src[2],
 127                                 GLuint bitmask );
 128
 129 extern void gl_update_color_material( GLcontext *ctx, const GLchan rgba[4] );
 130
 131
 132 #endif
 133