src/mesa/swrast/s_fog.h

   1 /* $Id: s_fog.h,v 1.7 2002/01/21 18:12:34 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 S_FOG_H
  29 #define S_FOG_H
  30
  31
  32 #include "mtypes.h"
  33 #include "swrast.h"
  34
  35
  36 extern GLfloat
  37 _mesa_z_to_fogfactor(GLcontext *ctx, GLfloat z);
  38
  39
  40 extern void
  41 _old_fog_rgba_pixels( const GLcontext *ctx,
  42                        GLuint n, const GLfloat fog[],
  43                        GLchan rgba[][4] );
  44 extern void
  45 _mesa_fog_rgba_pixels( const GLcontext *ctx, struct sw_span *span,
  46                        GLchan rgba[][4]);
  47 extern void
  48 _mesa_fog_rgba_pixels_with_array( const GLcontext *ctx, struct sw_span *span,
  49                                   const GLfloat fog[], GLchan rgba[][4] );
  50
  51
  52 extern void
  53 _mesa_fog_ci_pixels( const GLcontext *ctx, struct sw_span *span,
  54                      GLuint indx[]);
  55 extern void
  56 _mesa_fog_ci_pixels_with_array( const GLcontext *ctx, struct sw_span *span,
  57                                 const GLfloat fog[], GLuint index[] );
  58 extern void
  59 _old_fog_ci_pixels( const GLcontext *ctx,
  60                     GLuint n, const GLfloat fog[],
  61                     GLuint indx[] );
  62
  63 extern void
  64 _mesa_win_fog_coords_from_z( const GLcontext *ctx,
  65                              GLuint n,
  66                              const GLdepth z[],
  67                              GLfloat fogcoord[] );
  68
  69 extern void
  70 _mesa_depth_fog_rgba_pixels( const GLcontext *ctx, struct sw_span *span,
  71                              GLchan rgba[][4] );
  72 extern void
  73 _old_depth_fog_rgba_pixels( const GLcontext *ctx,
  74                              GLuint n, const GLdepth z[], GLchan rgba[][4] );
  75
  76 extern void
  77 _mesa_depth_fog_ci_pixels( const GLcontext *ctx, struct sw_span *span,
  78                            GLuint index[] );
  79 extern void
  80 _old_depth_fog_ci_pixels( const GLcontext *ctx,
  81                           GLuint n, const GLdepth z[], GLuint index[] );
  82
  83 #endif