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); 111 112