/* $Id: fog.h,v 1.7 2000/10/28 18:34:48 brianp Exp $ */

/*
 * Mesa 3-D graphics library
 * Version:  3.5
 * 
 * Copyright (C) 1999-2000  Brian Paul   All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */


#ifndef FOG_H
#define FOG_H


#include "types.h"



extern void
_mesa_Fogf(GLenum pname, GLfloat param);


extern void
_mesa_Fogi(GLenum pname, GLint param );


extern void
_mesa_Fogfv(GLenum pname, const GLfloat *params );


extern void
_mesa_Fogiv(GLenum pname, const GLint *params );



extern void
_mesa_fog_rgba_pixels( const GLcontext *ctx,
                       GLuint n, const GLfixed fog[],
                       GLchan rgba[][4] );

extern void
_mesa_fog_ci_pixels( const GLcontext *ctx,
                     GLuint n, const GLfixed fog[], GLuint indx[] );


extern void 
_mesa_make_win_fog_coords( struct vertex_buffer *VB );


extern void
_mesa_win_fog_coords_from_z( const GLcontext *ctx,
			     GLuint n, 
			     const GLdepth z[], 
			     GLfixed fogcoord[] );

extern void
_mesa_depth_fog_rgba_pixels( const GLcontext *ctx,
			     GLuint n, const GLdepth z[], GLubyte rgba[][4] );

extern void
_mesa_depth_fog_ci_pixels( const GLcontext *ctx,
			   GLuint n, const GLdepth z[], GLuint index[] );



extern void
_mesa_init_fog( void );


#endif