quakeforge/include/d_local.h

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/*
d_local.h
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Private rasterization driver defs
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Copyright (C) 1996-1997 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
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#ifndef _D_LOCAL_H
#define _D_LOCAL_H
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#include "QF/model.h"
#include "QF/qtypes.h"
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//
// TODO: fine-tune this; it's based on providing some overage even if there
// is a 2k-wide scan, with subdivision every 8, for 256 spans of 12 bytes each
//
#define SCANBUFFERPAD 0x1000
#define R_SKY_SMASK 0x007F0000
#define R_SKY_TMASK 0x007F0000
#define DS_SPAN_LIST_END -128
#define SURFCACHE_SIZE_AT_320X200 600*1024
typedef struct surfcache_s
{
struct surfcache_s *next;
struct surfcache_s **owner; // NULL is an empty chunk of memory
int lightadj[MAXLIGHTMAPS]; // checked for strobe flush
int dlight;
int size; // including header
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unsigned int width;
unsigned int height; // DEBUG needed only for debug
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float mipscale;
struct texture_s *texture; // checked for animating textures
byte data[4]; // width*height elements
} surfcache_t;
// !!! if this is changed, it must be changed in asm_draw.h too !!!
typedef struct sspan_s {
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int u, v, count;
} sspan_t;
extern struct cvar_s *d_subdiv16;
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extern float scale_for_mip;
extern qboolean d_roverwrapped;
extern surfcache_t *sc_rover;
extern surfcache_t *d_initial_rover;
extern float d_sdivzstepu, d_tdivzstepu, d_zistepu;
extern float d_sdivzstepv, d_tdivzstepv, d_zistepv;
extern float d_sdivzorigin, d_tdivzorigin, d_ziorigin;
extern float d_skyoffs;
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extern fixed16_t sadjust, tadjust;
extern fixed16_t bbextents, bbextentt;
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// FIXME: Better way of handling D_DrawSpans depths?
struct espan_s;
void D_DrawSpans (struct espan_s *pspans);
void D_DrawSpans8 (struct espan_s *pspans);
void D_DrawSpans16 (struct espan_s *pspans);
void D_DrawZSpans (struct espan_s *pspans);
void Turbulent (struct espan_s *pspan);
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void D_SpriteDrawSpans (sspan_t *pspan);
void D_DrawSkyScans (struct espan_s *pspan);
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void R_ShowSubDiv (void);
extern void (*prealspandrawer)(void);
struct entity_s;
surfcache_t *D_CacheSurface (struct entity_s *ent,
msurface_t *surface, int miplevel);
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int D_MipLevelForScale (float scale) __attribute__((pure));
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#ifdef USE_INTEL_ASM
void D_PolysetAff8Start (void);
void D_PolysetAff8End (void);
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#endif
extern byte *d_viewbuffer;
extern int d_rowbytes;
extern unsigned d_height;
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extern short *d_zbuffer;
extern int d_zrowbytes;
extern unsigned d_zwidth;
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extern int *d_pscantable;
extern int d_scantable[];
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extern int d_vrectx, d_vrecty, d_vrectright_particle, d_vrectbottom_particle;
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extern int d_y_aspect_shift, d_pix_min, d_pix_max, d_pix_shift;
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extern short *zspantable[];
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extern int d_minmip;
extern float d_scalemip[3];
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extern void (*d_drawspans) (struct espan_s *pspan);
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void D_RasterizeAliasPolySmooth (void);
void D_PolysetCalcGradients (int skinwidth);
void D_PolysetScanLeftEdge (int height);
struct spanpackage_s;
void D_PolysetDrawSpans8 (struct spanpackage_s * pspanpackage);
void D_DrawTurbulent8Span (void);
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#endif // _D_LOCAL_H