src/glu/mesa/tess.h

   1 /* $Id: tess.h,v 1.16 1999/12/06 09:39:34 gareth 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  * GLU 1.3 Polygon Tessellation by Gareth Hughes <garethh@bell-labs.com>
  30  *
  31  *****************************************************************************/
  32
  33 #ifndef __GLU_TESS_H__
  34 #define __GLU_TESS_H__
  35
  36 #include <stdarg.h>
  37 #include <stdio.h>
  38
  39 #include "gluP.h"
  40
  41 #include "tess_typedefs.h"
  42 #include "tess_macros.h"
  43 #include "tess_hash.h"
  44 #include "tess_heap.h"
  45 #if 0
  46 #include "tess_grid.h"
  47 #endif
  48
  49 #ifdef __cplusplus
  50 extern "C" {
  51 #endif
  52
  53 /*****************************************************************************
  54  * The GLUtesselator structure:
  55  *****************************************************************************/
  56 struct GLUtesselator
  57 {
  58     tess_callbacks_t    callbacks;
  59     GLenum              winding_rule;
  60     GLboolean           boundary_only;
  61     GLdouble            tolerance;
  62     GLenum              orientation;
  63     void                *data;
  64     GLint               num_contours;
  65     tess_contour_t      *contours, *last_contour;
  66     tess_contour_t      *current_contour;
  67     GLdouble            mins[2], maxs[2];
  68     GLint               num_vertices;
  69     tess_vertex_t       **sorted_vertices;
  70 #if 0
  71     tess_grid_t         *grid;                  /* Not currently used... */
  72 #endif
  73     heap_t              *ears;
  74     GLboolean           edge_flag;
  75     GLuint              label;
  76     tess_plane_t        plane;
  77     GLenum              error;
  78 };
  79
  80
  81 /*****************************************************************************
  82  * Common tessellation functions:
  83  *****************************************************************************/
  84 extern void tess_error_callback( GLUtesselator *, GLenum );
  85
  86 extern GLdouble twice_contour_area( tess_contour_t *contour );
  87 extern void reverse_contour( tess_contour_t *contour );
  88 extern void delete_contour( tess_contour_t **contour );
  89
  90 extern void contour_dump( tess_contour_t *contour );
  91
  92
  93 /*****************************************************************************
  94  * Debugging output:
  95  *****************************************************************************/
  96 #ifdef DEBUG
  97 extern  int     tess_dbg_level;
  98
  99 #define DBG_LEVEL_BASE          1
 100 #define DBG_LEVEL_VERBOSE       10
 101 #define DBG_LEVEL_ENTEREXIT     20
 102
 103 #ifdef _WIN32
 104 #define DBG_STREAM      stdout
 105 #else
 106 #define DBG_STREAM      stderr
 107 #endif
 108
 109 #ifdef __GNUC__
 110 #define MSG( level, format, args... )                                   \
 111     if ( level <= tess_dbg_level ) {                                    \
 112         fprintf( DBG_STREAM, "%9.9s:%d:\t ", __FILE__, __LINE__ );      \
 113         fprintf( DBG_STREAM, format, ## args );                         \
 114         fflush( DBG_STREAM );                                           \
 115     }
 116 #else
 117 #define MSG             tess_msg
 118 #endif /* __GNUC__ */
 119
 120 #else
 121 #define MSG             tess_msg
 122 #endif /* DEBUG */
 123
 124 extern INLINE void tess_msg( GLint level, char *format, ... );
 125 extern INLINE void tess_info( char *file, GLint line );
 126
 127 #ifdef __cplusplus
 128 }
 129 #endif
 130
 131 #endif /* __GLU_TESS_H__ */