src/mesa/main/light.h

   1 /* $Id: light.h,v 1.15 2002/10/25 21:06:30 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.5
   6  *
   7  * Copyright (C) 1999-2001  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  * Result should be a GLfloat.
  82  */
  83 #define GET_SHINE_TAB_ENTRY( table, dp, result )                        \
  84 do {                                                                    \
  85    struct gl_shine_tab *_tab = table;                                   \
  86    float f = (dp * (SHINE_TABLE_SIZE-1));                               \
  87    int k = (int) f;                                                     \
  88    if (k > SHINE_TABLE_SIZE-2)                                          \
  89       result = (GLfloat) _mesa_pow( dp, _tab->shininess );              \
  90    else                                                                 \
  91       result = _tab->tab[k] + (f-k)*(_tab->tab[k+1]-_tab->tab[k]);      \
  92 } while (0)
  93
  94
  95
  96 extern GLuint _mesa_material_bitmask( GLcontext *ctx,
  97                                       GLenum face, GLenum pname,
  98                                       GLuint legal,
  99                                       const char * );
 100
 101 extern void _mesa_invalidate_spot_exp_table( struct gl_light *l );
 102
 103 extern void _mesa_invalidate_shine_table( GLcontext *ctx, GLuint i );
 104
 105 extern void _mesa_validate_all_lighting_tables( GLcontext *ctx );
 106
 107 extern void _mesa_update_lighting( GLcontext *ctx );
 108
 109 extern void _mesa_compute_light_positions( GLcontext *ctx );
 110
 111 extern void _mesa_update_material( GLcontext *ctx,
 112                                    const struct gl_material src[2],
 113                                    GLuint bitmask );
 114
 115 extern void _mesa_copy_material_pairs( struct gl_material dst[2],
 116                                        const struct gl_material src[2],
 117                                        GLuint bitmask );
 118
 119 extern void _mesa_update_color_material( GLcontext *ctx,
 120                                          const GLfloat rgba[4] );
 121
 122
 123 #endif