src/mesa/main/clip.h

   1 /* $Id: clip.h,v 1.3 1999/11/11 01:22:25 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.1
   6  *
   7  * Copyright (C) 1999  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
  29
  30
  31 #ifndef CLIP_H
  32 #define CLIP_H
  33
  34
  35 #include "types.h"
  36
  37
  38
  39 #ifdef DEBUG
  40 #  define GL_VIEWCLIP_POINT( V )   gl_viewclip_point( V )
  41 #else
  42 #  define GL_VIEWCLIP_POINT( V )                        \
  43      (    (V)[0] <= (V)[3] && (V)[0] >= -(V)[3]         \
  44        && (V)[1] <= (V)[3] && (V)[1] >= -(V)[3]         \
  45        && (V)[2] <= (V)[3] && (V)[2] >= -(V)[3] )
  46 #endif
  47
  48
  49
  50
  51 #define CLIP_TAB_EDGEFLAG 1
  52
  53 extern void gl_init_clip(void);
  54
  55
  56 extern GLuint gl_viewclip_point( const GLfloat v[] );
  57
  58
  59
  60 extern GLuint gl_userclip_point( GLcontext* ctx, const GLfloat v[] );
  61
  62
  63 extern void gl_user_cliptest( struct vertex_buffer *VB );
  64
  65
  66 extern void _mesa_ClipPlane( GLenum plane, const GLdouble *equation );
  67
  68 extern void _mesa_GetClipPlane( GLenum plane, GLdouble *equation );
  69
  70
  71 /*
  72  * Clipping interpolation functions
  73  */
  74
  75 extern void gl_clip_interp_all( struct vertex_buffer *VB,
  76                                 GLuint dst, GLfloat t, GLuint in, GLuint out );
  77
  78 extern void gl_clip_interp_color_tex( struct vertex_buffer *VB,
  79                                 GLuint dst, GLfloat t, GLuint in, GLuint out );
  80
  81 extern void gl_clip_interp_tex( struct vertex_buffer *VB,
  82                                 GLuint dst, GLfloat t, GLuint in, GLuint out );
  83
  84 extern void gl_clip_interp_color( struct vertex_buffer *VB,
  85                                 GLuint dst, GLfloat t, GLuint in, GLuint out );
  86
  87 extern void gl_clip_interp_none( struct vertex_buffer *VB,
  88                                 GLuint dst, GLfloat t, GLuint in, GLuint out );
  89
  90
  91 extern void gl_update_userclip( GLcontext *ctx );
  92
  93 extern void gl_update_clipmask( GLcontext *ctx );
  94
  95 #endif