Games/Quake/d_local.h

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // d_local.h:  private rasterization driver defs
  21
  22 #include "r_shared.h"
  23
  24 //
  25 // TODO: fine-tune this; it's based on providing some overage even if there
  26 // is a 2k-wide scan, with subdivision every 8, for 256 spans of 12 bytes each
  27 //
  28 #define SCANBUFFERPAD           0x1000
  29
  30 #define R_SKY_SMASK     0x007F0000
  31 #define R_SKY_TMASK     0x007F0000
  32
  33 #define DS_SPAN_LIST_END        -128
  34
  35 #define SURFCACHE_SIZE_AT_320X200       600*1024
  36
  37 typedef struct surfcache_s
  38 {
  39         struct surfcache_s      *next;
  40         struct surfcache_s      **owner;                // NULL is an empty chunk of memory
  41         int                                     lightadj[MAXLIGHTMAPS]; // checked for strobe flush
  42         int                                     dlight;
  43         int                                     size;           // including header
  44         unsigned                        width;
  45         unsigned                        height;         // DEBUG only needed for debug
  46         float                           mipscale;
  47         struct texture_s        *texture;       // checked for animating textures
  48         byte                            data[4];        // width*height elements
  49 } surfcache_t;
  50
  51 // !!! if this is changed, it must be changed in asm_draw.h too !!!
  52 typedef struct sspan_s
  53 {
  54         int                             u, v, count;
  55 } sspan_t;
  56
  57 extern cvar_t   d_subdiv16;
  58
  59 extern float    scale_for_mip;
  60
  61 extern qboolean         d_roverwrapped;
  62 extern surfcache_t      *sc_rover;
  63 extern surfcache_t      *d_initial_rover;
  64
  65 extern float    d_sdivzstepu, d_tdivzstepu, d_zistepu;
  66 extern float    d_sdivzstepv, d_tdivzstepv, d_zistepv;
  67 extern float    d_sdivzorigin, d_tdivzorigin, d_ziorigin;
  68
  69 fixed16_t       sadjust, tadjust;
  70 fixed16_t       bbextents, bbextentt;
  71
  72
  73 void D_DrawSpans8 (espan_t *pspans);
  74 void D_DrawSpans16 (espan_t *pspans);
  75 void D_DrawZSpans (espan_t *pspans);
  76 void Turbulent8 (espan_t *pspan);
  77 void D_SpriteDrawSpans (sspan_t *pspan);
  78
  79 void D_DrawSkyScans8 (espan_t *pspan);
  80 void D_DrawSkyScans16 (espan_t *pspan);
  81
  82 void R_ShowSubDiv (void);
  83 void (*prealspandrawer)(void);
  84 surfcache_t     *D_CacheSurface (msurface_t *surface, int miplevel);
  85
  86 extern int D_MipLevelForScale (float scale);
  87
  88 #if id386
  89 extern void D_PolysetAff8Start (void);
  90 extern void D_PolysetAff8End (void);
  91 #endif
  92
  93 extern short *d_pzbuffer;
  94 extern unsigned int d_zrowbytes, d_zwidth;
  95
  96 extern int      *d_pscantable;
  97 extern int      d_scantable[MAXHEIGHT];
  98
  99 extern int      d_vrectx, d_vrecty, d_vrectright_particle, d_vrectbottom_particle;
 100
 101 extern int      d_y_aspect_shift, d_pix_min, d_pix_max, d_pix_shift;
 102
 103 extern pixel_t  *d_viewbuffer;
 104
 105 extern short    *zspantable[MAXHEIGHT];
 106
 107 extern int              d_minmip;
 108 extern float    d_scalemip[3];
 109
 110 extern void (*d_drawspans) (espan_t *pspan);
 111