661 lines
14 KiB
C
661 lines
14 KiB
C
/*
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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// r_surf.c: surface-related refresh code
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#include "quakedef.h"
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#include "r_local.h"
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drawsurf_t r_drawsurf;
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int lightleft, sourcesstep, blocksize, sourcetstep;
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int lightdelta, lightdeltastep;
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int lightright, lightleftstep, lightrightstep, blockdivshift;
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unsigned blockdivmask;
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void *prowdestbase;
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unsigned char *pbasesource;
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int surfrowbytes; // used by ASM files
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unsigned *r_lightptr;
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int r_stepback;
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int r_lightwidth;
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int r_numhblocks, r_numvblocks;
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unsigned char *r_source, *r_sourcemax;
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void R_DrawSurfaceBlock8_mip0 (void);
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void R_DrawSurfaceBlock8_mip1 (void);
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void R_DrawSurfaceBlock8_mip2 (void);
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void R_DrawSurfaceBlock8_mip3 (void);
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static void (*surfmiptable[4])(void) = {
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R_DrawSurfaceBlock8_mip0,
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R_DrawSurfaceBlock8_mip1,
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R_DrawSurfaceBlock8_mip2,
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R_DrawSurfaceBlock8_mip3
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};
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unsigned blocklights[18*18];
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/*
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===============
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R_AddDynamicLights
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===============
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*/
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void R_AddDynamicLights (void)
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{
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msurface_t *surf;
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int lnum;
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int sd, td;
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float dist, rad, minlight;
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vec3_t impact, local;
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int s, t;
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int i;
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int smax, tmax;
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mtexinfo_t *tex;
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surf = r_drawsurf.surf;
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smax = (surf->extents[0]>>4)+1;
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tmax = (surf->extents[1]>>4)+1;
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tex = surf->texinfo;
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for (lnum=0 ; lnum<MAX_DLIGHTS ; lnum++)
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{
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if ( !(surf->dlightbits & (1<<lnum) ) )
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continue; // not lit by this light
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rad = cl_dlights[lnum].radius;
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dist = DotProduct (cl_dlights[lnum].origin, surf->plane->normal) -
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surf->plane->dist;
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rad -= fabs(dist);
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minlight = cl_dlights[lnum].minlight;
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if (rad < minlight)
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continue;
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minlight = rad - minlight;
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for (i=0 ; i<3 ; i++)
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{
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impact[i] = cl_dlights[lnum].origin[i] -
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surf->plane->normal[i]*dist;
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}
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local[0] = DotProduct (impact, tex->vecs[0]) + tex->vecs[0][3];
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local[1] = DotProduct (impact, tex->vecs[1]) + tex->vecs[1][3];
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local[0] -= surf->texturemins[0];
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local[1] -= surf->texturemins[1];
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for (t = 0 ; t<tmax ; t++)
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{
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td = local[1] - t*16;
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if (td < 0)
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td = -td;
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for (s=0 ; s<smax ; s++)
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{
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sd = local[0] - s*16;
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if (sd < 0)
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sd = -sd;
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if (sd > td)
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dist = sd + (td>>1);
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else
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dist = td + (sd>>1);
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if (dist < minlight)
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blocklights[t*smax + s] += (rad - dist)*256;
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}
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}
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}
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}
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/*
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===============
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R_BuildLightMap
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Combine and scale multiple lightmaps into the 8.8 format in blocklights
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===============
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*/
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void R_BuildLightMap (void)
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{
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int smax, tmax;
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int t;
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int i, size;
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byte *lightmap;
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unsigned scale;
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int maps;
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msurface_t *surf;
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surf = r_drawsurf.surf;
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smax = (surf->extents[0]>>4)+1;
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tmax = (surf->extents[1]>>4)+1;
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size = smax*tmax;
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lightmap = surf->samples;
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if (/* r_fullbright.value || */ !cl.worldmodel->lightdata)
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{
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for (i=0 ; i<size ; i++)
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blocklights[i] = 0;
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return;
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}
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// clear to ambient
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for (i=0 ; i<size ; i++)
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blocklights[i] = r_refdef.ambientlight<<8;
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// add all the lightmaps
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if (lightmap)
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for (maps = 0 ; maps < MAXLIGHTMAPS && surf->styles[maps] != 255 ;
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maps++)
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{
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scale = r_drawsurf.lightadj[maps]; // 8.8 fraction
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for (i=0 ; i<size ; i++)
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blocklights[i] += lightmap[i] * scale;
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lightmap += size; // skip to next lightmap
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}
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// add all the dynamic lights
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if (surf->dlightframe == r_framecount)
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R_AddDynamicLights ();
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// bound, invert, and shift
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for (i=0 ; i<size ; i++)
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{
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t = (255*256 - (int)blocklights[i]) >> (8 - VID_CBITS);
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if (t < (1 << 6))
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t = (1 << 6);
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blocklights[i] = t;
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}
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}
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/*
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===============
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R_TextureAnimation
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Returns the proper texture for a given time and base texture
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===============
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*/
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texture_t *R_TextureAnimation (texture_t *base)
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{
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int reletive;
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int count;
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if (currententity->frame)
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{
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if (base->alternate_anims)
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base = base->alternate_anims;
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}
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if (!base->anim_total)
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return base;
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reletive = (int)(cl.time*10) % base->anim_total;
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count = 0;
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while (base->anim_min > reletive || base->anim_max <= reletive)
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{
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base = base->anim_next;
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if (!base)
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Sys_Error ("R_TextureAnimation: broken cycle");
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if (++count > 100)
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Sys_Error ("R_TextureAnimation: infinite cycle");
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}
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return base;
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}
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/*
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===============
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R_DrawSurface
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===============
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*/
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void R_DrawSurface (void)
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{
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unsigned char *basetptr;
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int smax, tmax, twidth;
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int u;
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int soffset, basetoffset, texwidth;
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int horzblockstep;
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unsigned char *pcolumndest;
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void (*pblockdrawer)(void);
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texture_t *mt;
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// calculate the lightings
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R_BuildLightMap ();
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surfrowbytes = r_drawsurf.rowbytes;
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mt = r_drawsurf.texture;
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r_source = (byte *)mt + mt->offsets[r_drawsurf.surfmip];
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// the fractional light values should range from 0 to (VID_GRADES - 1) << 16
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// from a source range of 0 - 255
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texwidth = mt->width >> r_drawsurf.surfmip;
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blocksize = 16 >> r_drawsurf.surfmip;
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blockdivshift = 4 - r_drawsurf.surfmip;
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blockdivmask = (1 << blockdivshift) - 1;
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r_lightwidth = (r_drawsurf.surf->extents[0]>>4)+1;
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r_numhblocks = r_drawsurf.surfwidth >> blockdivshift;
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r_numvblocks = r_drawsurf.surfheight >> blockdivshift;
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//==============================
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if (r_pixbytes == 1)
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{
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pblockdrawer = surfmiptable[r_drawsurf.surfmip];
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// TODO: only needs to be set when there is a display settings change
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horzblockstep = blocksize;
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}
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else
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{
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pblockdrawer = R_DrawSurfaceBlock16;
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// TODO: only needs to be set when there is a display settings change
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horzblockstep = blocksize << 1;
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}
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smax = mt->width >> r_drawsurf.surfmip;
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twidth = texwidth;
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tmax = mt->height >> r_drawsurf.surfmip;
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sourcetstep = texwidth;
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r_stepback = tmax * twidth;
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r_sourcemax = r_source + (tmax * smax);
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soffset = r_drawsurf.surf->texturemins[0];
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basetoffset = r_drawsurf.surf->texturemins[1];
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// << 16 components are to guarantee positive values for %
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soffset = ((soffset >> r_drawsurf.surfmip) + (smax << 16)) % smax;
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basetptr = &r_source[((((basetoffset >> r_drawsurf.surfmip)
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+ (tmax << 16)) % tmax) * twidth)];
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pcolumndest = r_drawsurf.surfdat;
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for (u=0 ; u<r_numhblocks; u++)
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{
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r_lightptr = blocklights + u;
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prowdestbase = pcolumndest;
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pbasesource = basetptr + soffset;
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(*pblockdrawer)();
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soffset = soffset + blocksize;
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if (soffset >= smax)
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soffset = 0;
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pcolumndest += horzblockstep;
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}
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}
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//=============================================================================
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#if !id386
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/*
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================
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R_DrawSurfaceBlock8_mip0
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================
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*/
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void R_DrawSurfaceBlock8_mip0 (void)
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{
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int v, i, b, lightstep, lighttemp, light;
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unsigned char pix, *psource, *prowdest;
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psource = pbasesource;
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prowdest = prowdestbase;
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for (v=0 ; v<r_numvblocks ; v++)
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{
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// FIXME: make these locals?
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// FIXME: use delta rather than both right and left, like ASM?
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lightleft = r_lightptr[0];
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lightright = r_lightptr[1];
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r_lightptr += r_lightwidth;
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lightleftstep = (r_lightptr[0] - lightleft) >> 4;
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lightrightstep = (r_lightptr[1] - lightright) >> 4;
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for (i=0 ; i<16 ; i++)
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{
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lighttemp = lightleft - lightright;
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lightstep = lighttemp >> 4;
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light = lightright;
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for (b=15; b>=0; b--)
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{
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pix = psource[b];
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prowdest[b] = ((unsigned char *)vid.colormap)
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[(light & 0xFF00) + pix];
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light += lightstep;
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}
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psource += sourcetstep;
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lightright += lightrightstep;
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lightleft += lightleftstep;
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prowdest += surfrowbytes;
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}
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if (psource >= r_sourcemax)
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psource -= r_stepback;
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}
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}
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/*
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================
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R_DrawSurfaceBlock8_mip1
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================
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*/
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void R_DrawSurfaceBlock8_mip1 (void)
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{
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int v, i, b, lightstep, lighttemp, light;
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unsigned char pix, *psource, *prowdest;
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psource = pbasesource;
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prowdest = prowdestbase;
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for (v=0 ; v<r_numvblocks ; v++)
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{
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// FIXME: make these locals?
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// FIXME: use delta rather than both right and left, like ASM?
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lightleft = r_lightptr[0];
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lightright = r_lightptr[1];
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r_lightptr += r_lightwidth;
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lightleftstep = (r_lightptr[0] - lightleft) >> 3;
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lightrightstep = (r_lightptr[1] - lightright) >> 3;
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for (i=0 ; i<8 ; i++)
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{
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lighttemp = lightleft - lightright;
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lightstep = lighttemp >> 3;
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light = lightright;
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for (b=7; b>=0; b--)
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{
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pix = psource[b];
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prowdest[b] = ((unsigned char *)vid.colormap)
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[(light & 0xFF00) + pix];
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light += lightstep;
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}
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psource += sourcetstep;
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lightright += lightrightstep;
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lightleft += lightleftstep;
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prowdest += surfrowbytes;
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}
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if (psource >= r_sourcemax)
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psource -= r_stepback;
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}
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}
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/*
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================
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R_DrawSurfaceBlock8_mip2
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================
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*/
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void R_DrawSurfaceBlock8_mip2 (void)
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{
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int v, i, b, lightstep, lighttemp, light;
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unsigned char pix, *psource, *prowdest;
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psource = pbasesource;
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prowdest = prowdestbase;
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for (v=0 ; v<r_numvblocks ; v++)
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{
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// FIXME: make these locals?
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// FIXME: use delta rather than both right and left, like ASM?
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lightleft = r_lightptr[0];
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lightright = r_lightptr[1];
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r_lightptr += r_lightwidth;
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lightleftstep = (r_lightptr[0] - lightleft) >> 2;
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lightrightstep = (r_lightptr[1] - lightright) >> 2;
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for (i=0 ; i<4 ; i++)
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{
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lighttemp = lightleft - lightright;
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lightstep = lighttemp >> 2;
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light = lightright;
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for (b=3; b>=0; b--)
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{
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pix = psource[b];
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prowdest[b] = ((unsigned char *)vid.colormap)
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[(light & 0xFF00) + pix];
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light += lightstep;
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}
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psource += sourcetstep;
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lightright += lightrightstep;
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lightleft += lightleftstep;
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prowdest += surfrowbytes;
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}
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if (psource >= r_sourcemax)
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psource -= r_stepback;
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}
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}
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/*
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================
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R_DrawSurfaceBlock8_mip3
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================
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*/
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void R_DrawSurfaceBlock8_mip3 (void)
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{
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int v, i, b, lightstep, lighttemp, light;
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unsigned char pix, *psource, *prowdest;
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psource = pbasesource;
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prowdest = prowdestbase;
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for (v=0 ; v<r_numvblocks ; v++)
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{
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// FIXME: make these locals?
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// FIXME: use delta rather than both right and left, like ASM?
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lightleft = r_lightptr[0];
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lightright = r_lightptr[1];
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r_lightptr += r_lightwidth;
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lightleftstep = (r_lightptr[0] - lightleft) >> 1;
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lightrightstep = (r_lightptr[1] - lightright) >> 1;
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for (i=0 ; i<2 ; i++)
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{
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lighttemp = lightleft - lightright;
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lightstep = lighttemp >> 1;
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light = lightright;
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for (b=1; b>=0; b--)
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{
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pix = psource[b];
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prowdest[b] = ((unsigned char *)vid.colormap)
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[(light & 0xFF00) + pix];
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light += lightstep;
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}
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psource += sourcetstep;
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lightright += lightrightstep;
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lightleft += lightleftstep;
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prowdest += surfrowbytes;
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}
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if (psource >= r_sourcemax)
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psource -= r_stepback;
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}
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}
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/*
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================
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R_DrawSurfaceBlock16
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FIXME: make this work
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================
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*/
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void R_DrawSurfaceBlock16 (void)
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{
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int k;
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unsigned char *psource;
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int lighttemp, lightstep, light;
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unsigned short *prowdest;
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prowdest = (unsigned short *)prowdestbase;
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for (k=0 ; k<blocksize ; k++)
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{
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unsigned short *pdest;
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unsigned char pix;
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int b;
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psource = pbasesource;
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lighttemp = lightright - lightleft;
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lightstep = lighttemp >> blockdivshift;
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light = lightleft;
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pdest = prowdest;
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for (b=0; b<blocksize; b++)
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{
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pix = *psource;
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*pdest = vid.colormap16[(light & 0xFF00) + pix];
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psource += sourcesstep;
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pdest++;
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light += lightstep;
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}
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pbasesource += sourcetstep;
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lightright += lightrightstep;
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lightleft += lightleftstep;
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prowdest = (unsigned short *)((long)prowdest + surfrowbytes);
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}
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prowdestbase = prowdest;
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}
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#endif
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//============================================================================
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/*
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================
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R_GenTurbTile
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================
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*/
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void R_GenTurbTile (pixel_t *pbasetex, void *pdest)
|
|
{
|
|
int *turb;
|
|
int i, j, s, t;
|
|
byte *pd;
|
|
|
|
turb = sintable + ((int)(cl.time*SPEED)&(CYCLE-1));
|
|
pd = (byte *)pdest;
|
|
|
|
for (i=0 ; i<TILE_SIZE ; i++)
|
|
{
|
|
for (j=0 ; j<TILE_SIZE ; j++)
|
|
{
|
|
s = (((j << 16) + turb[i & (CYCLE-1)]) >> 16) & 63;
|
|
t = (((i << 16) + turb[j & (CYCLE-1)]) >> 16) & 63;
|
|
*pd++ = *(pbasetex + (t<<6) + s);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
================
|
|
R_GenTurbTile16
|
|
================
|
|
*/
|
|
void R_GenTurbTile16 (pixel_t *pbasetex, void *pdest)
|
|
{
|
|
int *turb;
|
|
int i, j, s, t;
|
|
unsigned short *pd;
|
|
|
|
turb = sintable + ((int)(cl.time*SPEED)&(CYCLE-1));
|
|
pd = (unsigned short *)pdest;
|
|
|
|
for (i=0 ; i<TILE_SIZE ; i++)
|
|
{
|
|
for (j=0 ; j<TILE_SIZE ; j++)
|
|
{
|
|
s = (((j << 16) + turb[i & (CYCLE-1)]) >> 16) & 63;
|
|
t = (((i << 16) + turb[j & (CYCLE-1)]) >> 16) & 63;
|
|
*pd++ = d_8to16table[*(pbasetex + (t<<6) + s)];
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
================
|
|
R_GenTile
|
|
================
|
|
*/
|
|
void R_GenTile (msurface_t *psurf, void *pdest)
|
|
{
|
|
if (psurf->flags & SURF_DRAWTURB)
|
|
{
|
|
if (r_pixbytes == 1)
|
|
{
|
|
R_GenTurbTile ((pixel_t *)
|
|
((byte *)psurf->texinfo->texture + psurf->texinfo->texture->offsets[0]), pdest);
|
|
}
|
|
else
|
|
{
|
|
R_GenTurbTile16 ((pixel_t *)
|
|
((byte *)psurf->texinfo->texture + psurf->texinfo->texture->offsets[0]), pdest);
|
|
}
|
|
}
|
|
else if (psurf->flags & SURF_DRAWSKY)
|
|
{
|
|
if (r_pixbytes == 1)
|
|
{
|
|
R_GenSkyTile (pdest);
|
|
}
|
|
else
|
|
{
|
|
R_GenSkyTile16 (pdest);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
Sys_Error ("Unknown tile type");
|
|
}
|
|
}
|
|
|