e254f8dd51de8fef7d58a1d830f8168fd36593d7
1 /* $Id: s_fog.h,v 1.8 2002/02/02 21:40:33 brianp Exp $ */
4 * Mesa 3-D graphics library
7 * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
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:
16 * The above copyright notice and this permission notice shall be included
17 * in all copies or substantial portions of the Software.
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.
37 _mesa_z_to_fogfactor(GLcontext
*ctx
, GLfloat z
);
41 _mesa_fog_rgba_pixels( const GLcontext
*ctx
, struct sw_span
*span
,
44 _mesa_fog_rgba_pixels_with_array( const GLcontext
*ctx
, struct sw_span
*span
,
45 const GLfloat fog
[], GLchan rgba
[][4] );
49 _mesa_fog_ci_pixels( const GLcontext
*ctx
, struct sw_span
*span
,
52 _mesa_fog_ci_pixels_with_array( const GLcontext
*ctx
, struct sw_span
*span
,
53 const GLfloat fog
[], GLuint index
[] );
56 _mesa_win_fog_coords_from_z( const GLcontext
*ctx
,
62 _mesa_depth_fog_rgba_pixels( const GLcontext
*ctx
, struct sw_span
*span
,
66 _mesa_depth_fog_ci_pixels( const GLcontext
*ctx
, struct sw_span
*span
,