r_shared.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 #if !defined(GLQUAKE) && !defined(PSP_HARDWARE_VIDEO)
  21 // r_shared.h: general refresh-related stuff shared between the refresh and the
  22 // driver
  23
  24 // FIXME: clean up and move into d_iface.h
  25
  26 #ifndef _R_SHARED_H_
  27 #define _R_SHARED_H_
  28
  29 #define MAXVERTS        16                                      // max points in a surface polygon
  30 #define MAXWORKINGVERTS (MAXVERTS+4)    // max points in an intermediate
  31                                                                                 //  polygon (while processing)
  32 // !!! if this is changed, it must be changed in d_ifacea.h too !!!
  33 #define MAXHEIGHT               1024
  34 #define MAXWIDTH                1280
  35 #define MAXDIMENSION    ((MAXHEIGHT > MAXWIDTH) ? MAXHEIGHT : MAXWIDTH)
  36
  37 #define SIN_BUFFER_SIZE (MAXDIMENSION+CYCLE)
  38
  39 #define INFINITE_DISTANCE       0x10000         // distance that's always guaranteed to
  40                                                                                 //  be farther away than anything in
  41                                                                                 //  the scene
  42
  43 //===================================================================
  44
  45 extern void     R_DrawLine (polyvert_t *polyvert0, polyvert_t *polyvert1);
  46
  47 extern int              cachewidth;
  48 extern pixel_t  *cacheblock;
  49 extern int              screenwidth;
  50
  51 extern  float   pixelAspect;
  52
  53 extern int              r_drawnpolycount;
  54
  55 extern cvar_t   r_clearcolor;
  56
  57 extern int      sintable[SIN_BUFFER_SIZE];
  58 extern int      intsintable[SIN_BUFFER_SIZE];
  59
  60 extern  vec3_t  vup, base_vup;
  61 extern  vec3_t  vpn, base_vpn;
  62 extern  vec3_t  vright, base_vright;
  63 extern  entity_t                *currententity;
  64
  65 #define NUMSTACKEDGES           2400
  66 #define MINEDGES                        NUMSTACKEDGES
  67 #define NUMSTACKSURFACES        800
  68 #define MINSURFACES                     NUMSTACKSURFACES
  69 #define MAXSPANS                        3000
  70
  71 // !!! if this is changed, it must be changed in asm_draw.h too !!!
  72 typedef struct espan_s
  73 {
  74         int                             u, v, count;
  75         struct espan_s  *pnext;
  76 } espan_t;
  77
  78 // FIXME: compress, make a union if that will help
  79 // insubmodel is only 1, flags is fewer than 32, spanstate could be a byte
  80 typedef struct surf_s
  81 {
  82         struct surf_s   *next;                  // active surface stack in r_edge.c
  83         struct surf_s   *prev;                  // used in r_edge.c for active surf stack
  84         struct espan_s  *spans;                 // pointer to linked list of spans to draw
  85         int                     key;                            // sorting key (BSP order)
  86         int                     last_u;                         // set during tracing
  87         int                     spanstate;                      // 0 = not in span
  88                                                                         // 1 = in span
  89                                                                         // -1 = in inverted span (end before
  90                                                                         //  start)
  91         int                     flags;                          // currentface flags
  92         void            *data;                          // associated data like msurface_t
  93         entity_t        *entity;
  94         float           nearzi;                         // nearest 1/z on surface, for mipmapping
  95         qboolean        insubmodel;
  96         float           d_ziorigin, d_zistepu, d_zistepv;
  97
  98         int                     pad[2];                         // to 64 bytes
  99 } surf_t;
 100
 101 extern  surf_t  *surfaces, *surface_p, *surf_max;
 102
 103 // surfaces are generated in back to front order by the bsp, so if a surf
 104 // pointer is greater than another one, it should be drawn in front
 105 // surfaces[1] is the background, and is used as the active surface stack.
 106 // surfaces[0] is a dummy, because index 0 is used to indicate no surface
 107 //  attached to an edge_t
 108
 109 //===================================================================
 110
 111 extern vec3_t   sxformaxis[4];  // s axis transformed into viewspace
 112 extern vec3_t   txformaxis[4];  // t axis transformed into viewspac
 113
 114 extern vec3_t   modelorg, base_modelorg;
 115
 116 extern  float   xcenter, ycenter;
 117 extern  float   xscale, yscale;
 118 extern  float   xscaleinv, yscaleinv;
 119 extern  float   xscaleshrink, yscaleshrink;
 120
 121 extern  int d_lightstylevalue[256]; // 8.8 frac of base light value
 122
 123 extern void TransformVector (vec3_t in, vec3_t out);
 124 extern void SetUpForLineScan(fixed8_t startvertu, fixed8_t startvertv,
 125         fixed8_t endvertu, fixed8_t endvertv);
 126
 127 extern int      r_skymade;
 128 extern void R_MakeSky (void);
 129
 130 extern int      ubasestep, errorterm, erroradjustup, erroradjustdown;
 131
 132 // flags in finalvert_t.flags
 133 #define ALIAS_LEFT_CLIP                         0x0001
 134 #define ALIAS_TOP_CLIP                          0x0002
 135 #define ALIAS_RIGHT_CLIP                        0x0004
 136 #define ALIAS_BOTTOM_CLIP                       0x0008
 137 #define ALIAS_Z_CLIP                            0x0010
 138 // !!! if this is changed, it must be changed in d_ifacea.h too !!!
 139 #define ALIAS_ONSEAM                            0x0020  // also defined in modelgen.h;
 140                                                                                         //  must be kept in sync
 141 #define ALIAS_XY_CLIP_MASK                      0x000F
 142
 143 // !!! if this is changed, it must be changed in asm_draw.h too !!!
 144 typedef struct edge_s
 145 {
 146         fixed16_t               u;
 147         fixed16_t               u_step;
 148         struct edge_s   *prev, *next;
 149         unsigned short  surfs[2];
 150         struct edge_s   *nextremove;
 151         float                   nearzi;
 152         medge_t                 *owner;
 153 } edge_t;
 154
 155 #endif  // _R_SHARED_H_
 156
 157 #endif  // GLQUAKE, PSP_HARDWARE_VIDEO