src/mesa/main/light.h

   1 /* $Id: light.h,v 1.7 2000/11/24 10:25:05 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 "mtypes.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_GetLightfv( GLenum light, GLenum pname, GLfloat *params );
  67
  68 extern void
  69 _mesa_GetLightiv( GLenum light, GLenum pname, GLint *params );
  70
  71 extern void
  72 _mesa_GetMaterialfv( GLenum face, GLenum pname, GLfloat *params );
  73
  74 extern 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 )                        \
  83 do {                                                                    \
  84    struct gl_shine_tab *_tab = table;                                   \
  85    if (dp>1.0)                                                          \
  86       result = pow( dp, _tab->shininess );                              \
  87    else {                                                               \
  88       float f = (dp * (SHINE_TABLE_SIZE-1));                            \
  89       int k = (int) f;                                                  \
  90       result = _tab->tab[k] + (f-k)*(_tab->tab[k+1]-_tab->tab[k]);      \
  91    }                                                                    \
  92 } while (0)
  93
  94
  95
  96 extern GLuint gl_material_bitmask( GLcontext *ctx,
  97                                    GLenum face, GLenum pname,
  98                                    GLuint legal,
  99                                    const char * );
 100
 101 extern void gl_set_material( GLcontext *ctx, GLuint bitmask,
 102                              const GLfloat *params);
 103
 104 extern void gl_compute_spot_exp_table( struct gl_light *l );
 105
 106 extern void gl_compute_shine_table( GLcontext *ctx, GLuint i,
 107                                     GLfloat shininess );
 108
 109 extern void gl_update_lighting( GLcontext *ctx );
 110
 111 extern void gl_compute_light_positions( GLcontext *ctx );
 112
 113 extern void gl_update_material( GLcontext *ctx,
 114                                 const struct gl_material src[2],
 115                                 GLuint bitmask );
 116
 117 extern void gl_update_color_material( GLcontext *ctx, const GLchan rgba[4] );
 118
 119
 120 #endif
 121