G3D/Drivers/SoftDrv/SPAN.H

   1 /****************************************************************************************/\r
   2 /*  span.h                                                                              */\r
   3 /*                                                                                      */\r
   4 /*  Author:       John Pollard, Ken Baird                                               */\r
   5 /*  Description:  Header for span.c and important defines                               */\r
   6 /*                                                                                      */\r
   7 /*  The contents of this file are subject to the Genesis3D Public License               */\r
   8 /*  Version 1.01 (the "License"); you may not use this file except in                   */\r
   9 /*  compliance with the License. You may obtain a copy of the License at                */\r
  10 /*  http://www.genesis3d.com                                                            */\r
  11 /*                                                                                      */\r
  12 /*  Software distributed under the License is distributed on an "AS IS"                 */\r
  13 /*  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See                */\r
  14 /*  the License for the specific language governing rights and limitations              */\r
  15 /*  under the License.                                                                  */\r
  16 /*                                                                                      */\r
  17 /*  The Original Code is Genesis3D, released March 25, 1999.                            */\r
  18 /*  Genesis3D Version 1.1 released November 15, 1999                                 */\r
  19 /*  Copyright (C) 1999 WildTangent, Inc. All Rights Reserved           */\r
  20 /*                                                                                      */\r
  21 /****************************************************************************************/\r
  22 #ifndef SPAN_H\r
  23 #define SPAN_H\r
  24 \r
  25 #include "basetype.h"\r
  26 \r
  27 #define MAXSPANS 25000\r
  28 #define MAXSCANLINES 768\r
  29 \r
  30 typedef struct SList \r
  31 {\r
  32     uint8               Used;\r
  33         int32           Min, Max;\r
  34         geFloat z1, z2;         // So we can spit z spans out for other spans that need to be occluded\r
  35     uint32              Flags;\r
  36     struct SList        *Last;\r
  37     struct SList        *Next;\r
  38 } SList;\r
  39 \r
  40 typedef struct\r
  41 {\r
  42         SList   *First;\r
  43         SList   *Current;\r
  44 } SpanMinMax;\r
  45 \r
  46 extern  int32   NumCachedAlphaPolys;\r
  47 extern  int32   NumCachedAlphaSpans;\r
  48 \r
  49 SList   *NewSList(void);\r
  50 void    FreeSList(SList *s);\r
  51 void    ResetSList(void);\r
  52 void    ResetSpans(uint32 Rows);\r
  53 \r
  54 extern SpanMinMax SMinMax[MAXSCANLINES];\r
  55 extern SList ScanHash[MAXSPANS];  // hash table for SList\r
  56 extern int32 CurrentSList;\r
  57 \r
  58 \r
  59 #endif\r