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light.c
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C/C++ Source or Header
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1996-04-15
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31KB
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1,279 lines
#include "light.hpp"
#include <stdlib.h>
#include "image.hpp"
#include "macs.hpp"
#include "video.hpp"
#include "palette.hpp"
#include "timing.hpp"
#include "specs.hpp"
#include "dprint.hpp"
#include "filter.hpp"
#include "status.hpp"
#include "dev.hpp"
light_source *first_light_source=NULL;
unsigned char *white_light,*white_light_initial,*green_light,*trans_table;
short ambient_ramp=0;
short shutdown_lighting_value,shutdown_lighting=0;
extern char disable_autolight; // defined in dev.hpp
int light_detail=MEDIUM_DETAIL;
long light_to_number(light_source *l)
{
if (!l) return 0;
int x=1;
for (light_source *s=first_light_source;s;s=s->next,x++)
if (s==l) return x;
return 0;
}
light_source *number_to_light(long x)
{
if (x==0) return NULL;
x--;
light_source *s=first_light_source;
for (;x && s;x--,s=s->next);
return s;
}
light_source *light_source::copy()
{
next=new light_source(type,x,y,inner_radius,outer_radius,xshift,yshift,next);
return next;
}
void delete_all_lights()
{
while (first_light_source)
{
if (dev_cont)
dev_cont->notify_deleted_light(first_light_source);
light_source *p=first_light_source;
first_light_source=first_light_source->next;
delete p;
}
}
void delete_light(light_source *which)
{
if (dev_cont)
dev_cont->notify_deleted_light(which);
if (which==first_light_source)
{
first_light_source=first_light_source->next;
delete which;
}
else
{
light_source *f=first_light_source;
for (;f->next!=which && f;f=f->next);
if (f)
{
f->next=which->next;
delete which;
}
}
}
void light_source::calc_range()
{
switch (type)
{
case 0 :
{ x1=x-(outer_radius>>xshift); y1=y-(outer_radius>>yshift);
x2=x+(outer_radius>>xshift); y2=y+(outer_radius>>yshift);
} break;
case 1 :
{ x1=x-(outer_radius>>xshift); y1=y-(outer_radius>>yshift);
x2=x+(outer_radius>>xshift); y2=y;
} break;
case 2 :
{ x1=x-(outer_radius>>xshift); y1=y;
x2=x+(outer_radius>>xshift); y2=y+(outer_radius>>yshift);
} break;
case 3 :
{ x1=x; y1=y-(outer_radius>>yshift);
x2=x+(outer_radius>>xshift); y2=y+(outer_radius>>yshift);
} break;
case 4 :
{ x1=x-(outer_radius>>xshift); y1=y-(outer_radius>>yshift);
x2=x; y2=y+(outer_radius>>yshift);
} break;
case 5 :
{ x1=x; y1=y-(outer_radius>>yshift);
x2=x+(outer_radius>>xshift); y2=y;
} break;
case 6 :
{ x1=x-(outer_radius>>xshift); y1=y-(outer_radius>>yshift);
x2=x; y2=y;
} break;
case 7 :
{ x1=x-(outer_radius>>xshift); y1=y;
x2=x; y2=y+(outer_radius>>yshift);
} break;
case 8 :
{ x1=x; y1=y;
x2=x+(outer_radius>>xshift); y2=y+(outer_radius>>yshift);
} break;
case 9 :
{
x1=x;
y1=y;
x2=x+xshift;
y2=y+yshift;
} break;
}
mul_div=(1<<16)/(outer_radius-inner_radius)*64;
}
light_source::light_source(char Type, long X, long Y, long Inner_radius,
long Outer_radius, long Xshift, long Yshift, light_source *Next)
{
type=Type;
x=X; y=Y;
inner_radius=Inner_radius;
outer_radius=Outer_radius;
next=Next;
known=0;
xshift=Xshift;
yshift=Yshift;
calc_range();
}
int count_lights()
{
int t=0;
for (light_source *s=first_light_source;s;s=s->next)
t++;
return t;
}
light_source *add_light_source(char type, long x, long y,
long inner, long outer, long xshift, long yshift)
{
first_light_source=new light_source(type,x,y,inner,outer,xshift,yshift,first_light_source);
return first_light_source;
}
#define TTINTS 9
uchar *tints[TTINTS];
uchar bright_tint[256];
void calc_tint(uchar *tint, int rs, int gs, int bs, int ra, int ga, int ba, palette *pal)
{
palette npal;
memset(npal.addr(),0,256);
int i=0;
for (;i<256;i++)
{
npal.set(i,(int)rs,(int)gs,(int)bs);
rs+=ra; if (rs>255) rs=255; if (rs<0) rs=0;
gs+=ga; if (gs>255) gs=255; if (gs<0) gs=0;
bs+=ba; if (bs>255) bs=255; if (bs<0) bs=0;
}
filter f(pal,&npal);
filter f2(&npal,pal);
for (i=0;i<256;i++,tint++)
*tint=f2.get_mapping(f.get_mapping(i));
}
void calc_light_table(palette *pal)
{
white_light_initial=(unsigned char *)jmalloc(256*64,"light table");
white_light=white_light_initial;
// green_light=(unsigned char *)jmalloc(256*64,"green light");
int i=0;
for (;i<TTINTS;i++)
tints[i]=(uchar *)jmalloc(256,"color tint");
bFILE *fp=open_file("light.tbl","rb");
int recalc=0;
if (fp->open_failure())
{
recalc=1;
delete fp;
}
else
{
if (fp->read_short()!=calc_crc((unsigned char *)pal->addr(),768))
recalc=1;
else
{
fp->read(white_light,256*64);
// fp->read(green_light,256*64);
for (i=0;i<TTINTS;i++)
fp->read(tints[i],256);
fp->read(bright_tint,256);
// trans_table=(uchar *)jmalloc(256*256,"transparency table");
// fp.read(trans_table,256*256);
}
delete fp;
}
if (recalc)
{
fprintf(stderr,"Palette has changed, recalculating light table...\n");
stat_man->push("white light",NULL);
int color=0;
for (;color<256;color++)
{
unsigned char r,g,b;
pal->get(color,r,g,b);
stat_man->update(color*100/256);
for (int intensity=63;intensity>=0;intensity--)
{
if (r>0 || g>0 || b>0)
white_light[intensity*256+color]=pal->find_closest(r,g,b);
else
white_light[intensity*256+color]=0;
if (r) r--; if (g) g--; if (b) b--;
}
}
stat_man->pop();
/* stat_man->push("green light",NULL);
for (color=0;color<256;color++)
{
stat_man->update(color*100/256);
unsigned char r,g,b;
pal->get(color,b,r,g);
r=r*3/5; b=b*3/5; g+=7; if (g>255) g=255;
for (int intensity=63;intensity>=0;intensity--)
{
if (r>0 || g>0 || b>0)
green_light[intensity*256+color]=pal->find_closest(r,g,b);
else
green_light[intensity*256+color]=0;
if (r) r--;
if ((intensity&1)==1)
if (g) g--;
if (b) b--;
}
}
stat_man->pop(); */
stat_man->push("tints",NULL);
uchar t[TTINTS*6]={0,0,0,0,0,0, // normal
0,0,0,1,0,0, // red
0,0,0,1,1,0, // yellow
0,0,0,1,0,1, // purple
0,0,0,1,1,1, // gray
0,0,0,0,1,0, // green
0,0,0,0,0,1, // blue
0,0,0,0,1,1, // cyan
0,0,0,0,0,0 // reverse green (night vision effect)
} ;
uchar *ti=t+6;
uchar *c;
for (i=0,c=tints[0];i<256;i++,c++) *c=i; // make the normal tint (maps everthing to itself)
for (i=0,c=tints[TTINTS-1];i<256;i++,c++) // reverse green
{
int r=pal->red(i)/2,g=255-pal->green(i)-30,b=pal->blue(i)*3/5+50;
if (g<0) g=0;
if (b>255) b=0;
*c=pal->find_closest(r,g,b);
}
for (i=0;i<256;i++)
{
int r=pal->red(i)+(255-pal->red(i))/2,
g=pal->green(i)+(255-pal->green(i))/2,
b=pal->blue(i)+(255-pal->blue(i))/2;
bright_tint[i]=pal->find_closest(r,g,b);
}
// make the colored tints
for (i=1;i<TTINTS-1;i++)
{
stat_man->update(i*100/(TTINTS-1));
calc_tint(tints[i],ti[0],ti[1],ti[2],ti[3],ti[4],ti[5],pal);
ti+=6;
}
stat_man->pop();
/* fprintf(stderr,"calculating transparency tables (256 total)\n");
trans_table=(uchar *)jmalloc(256*256,"transparency table");
uchar *tp=trans_table;
for (i=0;i<256;i++)
{
uchar r1,g1,b1,r2,g2,b2;
pal->get(i,r1,g1,b1);
if ((i%16)==0)
fprintf(stderr,"%d ",i);
for (int j=0;j<256;j++,tp++)
{
if (r1==0 && r2==0 && b2==0)
*tp=j;
else
{
pal->get(j,r2,g2,b2);
*tp=pal->find_closest((r2-r1)*3/7+r1,(g2-g1)*3/7+g1,(b2-b1)*3/7+b1);
}
}
}*/
bFILE *f=open_file("light.tbl","wb");
if (f->open_failure())
dprintf("Unable to open file light.tbl for writing\n");
else
{
f->write_short(calc_crc((unsigned char *)pal->addr(),768));
f->write(white_light,256*64);
// f->write(green_light,256*64);
for (int i=0;i<TTINTS;i++)
f->write(tints[i],256);
fp->write(bright_tint,256);
// f.write(trans_table,256*256);
}
delete f;
}
}
light_patch *light_patch::copy(light_patch *Next)
{
light_patch *p=new light_patch(x1,y1,x2,y2,Next);
p->total=total;
if (total)
{
p->lights=(light_source **)jmalloc(total*sizeof(light_source *),"light patches");
memcpy(p->lights,lights,total*(sizeof(light_source *)));
}
else
p->lights=NULL;
return p;
}
#define MAX_LP 6
// insert light into list make sure the are sorted by y1
void insert_light(light_patch *&first, light_patch *l)
{
if (!first)
first=l;
else if (l->y1<first->y1)
{
l->next=first;
first=l;
} else
{
light_patch *p=first;
for (;p->next && p->next->y1<l->y1;p=p->next);
l->next=p->next;
p->next=l;
}
}
void add_light(light_patch *&first, long x1, long y1, long x2, long y2,
light_source *who)
{
light_patch *last=NULL,*next;
light_patch *p=first;
for (;p;p=next)
{
next=p->next;
// first see if light patch we are adding is enclosed entirely by another patch
if (x1>=p->x1 && y1>=p->y1 && x2<=p->x2 && y2<=p->y2)
{
if (p->total==MAX_LP) return ;
if (x1>p->x1)
{
light_patch *l=p->copy(NULL);
l->x2=x1-1;
insert_light(first,l);
}
if (x2<p->x2)
{
light_patch *l=p->copy(NULL);
l->x1=x2+1;
insert_light(first,l);
}
if (y1>p->y1)
{
light_patch *l=p->copy(NULL);
l->x1=x1;
l->x2=x2;
l->y2=y1-1;
insert_light(first,l);
}
if (y2<p->y2)
{
light_patch *l=p->copy(NULL);
l->x1=x1;
l->x2=x2;
l->y1=y2+1;
insert_light(first,l);
}
p->x1=x1; p->y1=y1; p->x2=x2; p->y2=y2;
// p has possibly changed it's y1, so we need to move it to it's correct sorted
// spot in the list
if (first==p)
first=first->next;
else
{
light_patch *q=first;
for (;q->next!=p;q=q->next);
q->next=p->next;
}
insert_light(first,p);
p->total++;
p->lights=(light_source **)jrealloc(p->lights,sizeof(light_source *)*p->total,"patch_list");
p->lights[p->total-1]=who;
return ;
}
// see if the patch completly covers another patch.
if (x1<=p->x1 && y1<=p->y1 && x2>=p->x2 && y2>=p->y2)
{
if (x1<p->x1)
add_light(first,x1,y1,p->x1-1,y2,who);
if (x2>p->x2)
add_light(first,p->x2+1,y1,x2,y2,who);
if (y1<p->y1)
add_light(first,p->x1,y1,p->x2,p->y1-1,who);
if (y2>p->y2)
add_light(first,p->x1,p->y2+1,p->x2,y2,who);
if (p->total==MAX_LP) return ;
p->total++;
p->lights=(light_source **)jrealloc(p->lights,sizeof(light_source *)*p->total,"patch_list");
p->lights[p->total-1]=who;
return ;
}
// see if we intersect another rect
if (!(x2<p->x1 || y2<p->y1 || x1>p->x2 || y1>p->y2))
{
int ax1,ay1,ax2,ay2;
if (x1<p->x1)
{
add_light(first,x1,max(y1,p->y1),p->x1-1,min(y2,p->y2),who);
ax1=p->x1;
} else
ax1=x1;
if (x2>p->x2)
{
add_light(first,p->x2+1,max(y1,p->y1),x2,min(y2,p->y2),who);
ax2=p->x2;
}
else
ax2=x2;
if (y1<p->y1)
{
add_light(first,x1,y1,x2,p->y1-1,who);
ay1=p->y1;
} else
ay1=y1;
if (y2>p->y2)
{
add_light(first,x1,p->y2+1,x2,y2,who);
ay2=p->y2;
} else
ay2=y2;
add_light(first,ax1,ay1,ax2,ay2,who);
return ;
}
}
}
light_patch *find_patch(int screenx, int screeny, light_patch *list)
{
for (;list;list=list->next)
{
if (screenx>=list->x1 && screenx<=list->x2 && screeny>=list->y1 && screeny<=list->y2)
return list;
}
return NULL;
}
/* shit
int calc_light_value(light_patch *which, long x, long y)
{
int lv=0;
int t=which->total;
for (register int i=t-1;i>=0;i--)
{
light_source *fn=which->lights[i];
if (fn->type==9)
{
lv=fn->inner_radius;
i=0;
}
else
{
long dx=abs(fn->x-x)<<fn->xshift;
long dy=abs(fn->y-y)<<fn->yshift;
long r2;
if (dx<dy)
r2=dx+dy-(dx>>1);
else r2=dx+dy-(dy>>1);
if (r2>=fn->inner_radius)
{
if (r2<fn->outer_radius)
{
lv+=((fn->outer_radius-r2)*fn->mul_div)>>16;
}
} else lv=63;
}
}
if (lv>63) return 63;
else
return lv;
} */
void reduce_patches(light_patch *f) // find constant valued patches
{
}
light_patch *make_patch_list(int width, int height, long screenx, long screeny)
{
light_patch *first=new light_patch(0,0,width-1,height-1,NULL);
for (light_source *f=first_light_source;f;f=f->next) // determine which lights will have effect
{
long x1=f->x1-screenx,y1=f->y1-screeny,
x2=f->x2-screenx,y2=f->y2-screeny;
if (x1<0) x1=0;
if (y1<0) y1=0;
if (x2>=width) x2=width-1;
if (y2>=height) y2=height-1;
if (x1<=x2 && y1<=y2)
add_light(first,x1,y1,x2,y2,f);
}
reduce_patches(first);
return first;
}
void delete_patch_list(light_patch *first)
{
while (first)
{
light_patch *p=first;
first=first->next;
delete p;
}
}
/*
#ifdef __WATCOMC__
extern "C" {
extern long MAP_PUT(long pad, long screen_addr, long remap, long w);
} ;
#else*/
inline void MAP_PUT(long screen_addr, long remap, long w)
{
register int cx=w;
register int di=screen_addr;
register int si=remap;
while (cx--)
*((uchar *)(di++))=*((uchar *)si+*((uchar *)di));
}
inline void MAP_2PUT(long in_addr, long out_addr, long remap, long w)
{
while (w--)
{
uchar x=*(((uchar *)remap)+(*(uchar *)(in_addr++)));
*((uchar *)(out_addr++))=x;
*((uchar *)(out_addr++))=x;
}
}
/*
#endif
inline void PUT8(long *addr, uchar *remap)
{
register ulong in_pixels;
register ulong pixel;
register ulong out_pixels;
in_pixels=*addr;
pixel=in_pixels;
out_pixels=remap[(uchar)pixel];
pixel=in_pixels;
pixel>>=8;
pixel=remap[(uchar)pixel];
pixel<<=8;
out_pixels|=pixel;
pixel=in_pixels;
pixel>>=16;
pixel=remap[(uchar)pixel];
pixel<<=16;
out_pixels|=pixel;
pixel=in_pixels;
pixel>>=24;
pixel=remap[(uchar)pixel];
pixel<<=24;
out_pixels|=pixel;
*addr=out_pixels; // send out bus
// do next 4
in_pixels=addr[1];
pixel=in_pixels;
pixel&=0xff;
out_pixels=remap[pixel];
pixel=in_pixels;
pixel>>=8;
pixel=remap[(uchar)pixel];
pixel<<=8;
out_pixels|=pixel;
pixel=in_pixels;
pixel>>=16;
pixel=remap[(uchar)pixel];
pixel<<=16;
out_pixels|=pixel;
pixel=in_pixels;
pixel>>=24;
pixel=remap[(uchar)pixel];
pixel<<=24;
out_pixels|=pixel;
addr[1]=out_pixels; // send out bus
}
inline long MAP_PUT2(long dest_addr, long screen_addr, long remap, long w)
{ while (w--)
{
*((uchar *)(dest_addr))=*((uchar *)remap+*((uchar *)screen_addr));
screen_addr++;
dest_addr++;
}
return dest_addr;
}
*/
ushort min_light_level;
// calculate the light value for this block. sum up all contritors
inline int calc_light_value(light_patch *lp, // light patch to look at
long sx, // screen x & y
long sy)
{
int lv=min_light_level,r2,light_count;
register int dx,dy; // x and y distances
light_source **lon_p=lp->lights;
for (light_count=lp->total;light_count>0;light_count--)
{
light_source *fn=*lon_p;
register long *dt=&(*lon_p)->type;
// note we are accessing structure members by bypassing the compiler
// for speed, this may not work on all compilers, but don't
// see why it shouldn't.. all members are long
if (*dt==9) // (dt==type), if light is a Solid rectangle, return it value
return fn->inner_radius;
else
{
dt++;
dx=abs(*dt-sx); dt++; // xdist between light and this block (dt==x)
dx<<=*dt; dt++; // shift makes distance further,
// making light skinner. (dt==xshift)
dy=abs(*dt-sy); dt++; // ydist (dt==y)
dy<<=*dt; dt++; // (dt==yshift)
if (dx<dy) // calculate approximate distance
r2=dx+dy-(dx>>1);
else r2=dx+dy-(dy>>1);
if (r2<*dt) // if this withing the light's outer radius? (dt==outer_radius)
{
int v=*dt-r2; dt++;
lv+=v*(*dt)>>16;
}
}
lon_p++;
}
if (lv>63)
return 63; // lighting table only has 64 (256 bytes) entries
else return lv;
}
/*#ifdef __WATCOMC__
extern "C" void remap_line_asm(uchar *screen_line,uchar *light_lookup,uchar *remap_line,int count);
#else */
void remap_line_asm2(uchar *addr,uchar *light_lookup,uchar *remap_line,int count)
//inline void remap_line_asm2(uchar *addr,uchar *light_lookup,uchar *remap_line,int count)
{
while (count--)
{
uchar *off=light_lookup+(((long)*remap_line)<<8);
remap_line++;
*addr=off[*addr];
addr[1]=off[addr[1]];
addr[2]=off[addr[2]];
addr[3]=off[addr[3]];
addr[4]=off[addr[4]];
addr[5]=off[addr[5]];
addr[6]=off[addr[6]];
addr[7]=off[addr[7]];
addr+=8;
}
}
//#endif
inline void put_8line(uchar *in_line, uchar *out_line, uchar *remap, uchar *light_lookup, int count)
{
uchar v;
int x;
for (x=0;x<count;x++)
{
uchar *off=light_lookup+(((long)*remap)<<8);
v=off[*(in_line++)];
*(out_line++)=v;
*(out_line++)=v;
v=off[*(in_line++)];
*(out_line++)=v;
*(out_line++)=v;
v=off[*(in_line++)];
*(out_line++)=v;
*(out_line++)=v;
v=off[*(in_line++)];
*(out_line++)=v;
*(out_line++)=v;
v=off[*(in_line++)];
*(out_line++)=v;
*(out_line++)=v;
v=off[*(in_line++)];
*(out_line++)=v;
*(out_line++)=v;
v=off[*(in_line++)];
*(out_line++)=v;
*(out_line++)=v;
v=off[*(in_line++)];
*(out_line++)=v;
*(out_line++)=v;
remap++;
}
}
void light_screen(image *sc, long screenx, long screeny, uchar *light_lookup, ushort ambient)
{
int lx_run,ly_run; // light block x & y run size in pixels == (1<<lx_run)
if (shutdown_lighting && !disable_autolight)
ambient=shutdown_lighting_value;
switch (light_detail)
{
case HIGH_DETAIL :
{ lx_run=2; ly_run=1; } break; // 4 x 2 patches
case MEDIUM_DETAIL :
{ lx_run=3; ly_run=2; } break; // 8 x 4 patches (default)
case LOW_DETAIL :
{ lx_run=4; ly_run=3; } break; // 16 x 8 patches
case POOR_DETAIL : // poor detail is no lighting
return ;
}
if ((int)ambient+ambient_ramp<0)
min_light_level=0;
else if ((int)ambient+ambient_ramp>63)
min_light_level=63;
else min_light_level=(int)ambient+ambient_ramp;
if (ambient==63) return ;
short cx1,cy1,cx2,cy2;
sc->get_clip(cx1,cy1,cx2,cy2);
unsigned char *mint=light_lookup+min_light_level*256;
light_patch *first=make_patch_list(cx2-cx1+1,cy2-cy1+1,screenx,screeny);
int ytry=(1<<ly_run),xtry=(1<<lx_run);
int calcx_mask=(0xefffffff-(xtry-1));
int calcy_mask=(0xefffffff-(ytry-1));
int scr_w=screen->width();
int prefix_x=(screenx&7);
int prefix=screenx&7;
if (prefix)
prefix=8-prefix;
int suffix_x=cx2-cx1-(screenx&7);
int inside_xoff=(screenx+7)&(~7);
int suffix=(cx2-cx1-prefix+1)&7;
long remap_size=((cx2-cx1+1-prefix-suffix)>>lx_run);
uchar *remap_line=(uchar *)jmalloc(remap_size,"light remap line");
light_patch *f=first;
uchar *screen_line=screen->scan_line(cy1)+cx1;
for (int y=cy1;y<=cy2;)
{
int x,count;
// while (f->next && f->y2<y)
// f=f->next;
uchar *rem=remap_line;
int todoy=4-((screeny+y)&3);
if (y+todoy>cy2)
todoy=cy2-y+1;
int calcy=((y+screeny)&(~3))-cy1;
if (suffix)
{
light_patch *lp=f;
for (;(lp->y1>y-cy1 || lp->y2<y-cy1 ||
lp->x1>suffix_x || lp->x2<suffix_x);lp=lp->next);
long caddr=(long)screen_line+cx2-cx1+1-suffix;
uchar *r=light_lookup+(((long)calc_light_value(lp,suffix_x+screenx,calcy)<<8));
switch (todoy)
{
case 4 :
{
MAP_PUT(caddr,(long)r,suffix); caddr+=scr_w;
}
case 3 :
{ MAP_PUT(caddr,(long)r,suffix); caddr+=scr_w;}
case 2 :
{ MAP_PUT(caddr,(long)r,suffix); caddr+=scr_w;}
case 1 :
{
MAP_PUT(caddr,(long)r,suffix);
}
}
}
if (prefix)
{
light_patch *lp=f;
for (;(lp->y1>y-cy1 || lp->y2<y-cy1 ||
lp->x1>prefix_x || lp->x2<prefix_x);lp=lp->next);
uchar *r=light_lookup+(((long)calc_light_value(lp,prefix_x+screenx,calcy)<<8));
long caddr=(long)screen_line;
switch (todoy)
{
case 4 :
{
MAP_PUT(caddr,(long)r,prefix);
caddr+=scr_w;
}
case 3 :
{ MAP_PUT(caddr,(long)r,prefix); caddr+=scr_w; }
case 2 :
{ MAP_PUT(caddr,(long)r,prefix); caddr+=scr_w; }
case 1 :
{ MAP_PUT(caddr,(long)r,prefix); }
}
screen_line+=prefix;
}
for (x=prefix,count=0;count<remap_size;count++,x+=8,rem++)
{
light_patch *lp=f;
for (;(lp->y1>y-cy1 || lp->y2<y-cy1 || lp->x1>x || lp->x2<x);lp=lp->next);
*rem=calc_light_value(lp,x+screenx,calcy);
}
uchar *addr,*oaddr;
switch (todoy)
{
case 4 :
remap_line_asm2(screen_line,light_lookup,remap_line,count); y++; todoy--; screen_line+=scr_w;
case 3 :
remap_line_asm2(screen_line,light_lookup,remap_line,count); y++; todoy--; screen_line+=scr_w;
case 2 :
remap_line_asm2(screen_line,light_lookup,remap_line,count); y++; todoy--; screen_line+=scr_w;
case 1 :
remap_line_asm2(screen_line,light_lookup,remap_line,count); y++; todoy--; screen_line+=scr_w;
}
screen_line-=prefix;
}
while (first)
{
light_patch *p=first;
first=first->next;
delete p;
}
jfree(remap_line);
}
void double_light_screen(image *sc, long screenx, long screeny, uchar *light_lookup, ushort ambient,
image *out, long out_x, long out_y)
{
if (sc->width()*2+out_x>out->width() ||
sc->height()*2+out_y>out->height())
return ; // screen was resized and small_render has not changed size yet
int lx_run,ly_run; // light block x & y run size in pixels == (1<<lx_run)
switch (light_detail)
{
case HIGH_DETAIL :
{ lx_run=2; ly_run=1; } break; // 4 x 2 patches
case MEDIUM_DETAIL :
{ lx_run=3; ly_run=2; } break; // 8 x 4 patches (default)
case LOW_DETAIL :
{ lx_run=4; ly_run=3; } break; // 16 x 8 patches
case POOR_DETAIL : // poor detail is no lighting
return ;
}
if ((int)ambient+ambient_ramp<0)
min_light_level=0;
else if ((int)ambient+ambient_ramp>63)
min_light_level=63;
else min_light_level=(int)ambient+ambient_ramp;
short cx1,cy1,cx2,cy2;
sc->get_clip(cx1,cy1,cx2,cy2);
if (ambient==63) // lights off, just double the pixels
{
uchar *src=sc->scan_line(0);
uchar *dst=out->scan_line(out_y+cy1*2)+cx1*2+out_x;
int d_skip=out->width()-sc->width()*2;
int x,y;
ushort v;
for (y=sc->height();y;y--)
{
for (x=sc->width();x;x--)
{
v=*(src++);
*(dst++)=v;
*(dst++)=v;
}
dst=dst+d_skip;
memcpy(dst,dst-out->width(),sc->width()*2);
dst+=out->width();
}
return ;
}
unsigned char *mint=light_lookup+min_light_level*256;
light_patch *first=make_patch_list(cx2-cx1+1,cy2-cy1+1,screenx,screeny);
int ytry=(1<<ly_run),xtry=(1<<lx_run);
int calcx_mask=(0xefffffff-(xtry-1));
int calcy_mask=(0xefffffff-(ytry-1));
int scr_w=sc->width();
int dscr_w=out->width();
int prefix_x=(screenx&7);
int prefix=screenx&7;
if (prefix)
prefix=8-prefix;
int suffix_x=cx2-cx1-(screenx&7);
int inside_xoff=(screenx+7)&(~7);
int suffix=(cx2-cx1-prefix+1)&7;
long remap_size=((cx2-cx1+1-prefix-suffix)>>lx_run);
uchar *remap_line=(uchar *)jmalloc(remap_size,"light remap line");
light_patch *f=first;
uchar *in_line=sc->scan_line(cy1)+cx1;
uchar *out_line=out->scan_line(cy1*2+out_y)+cx1*2+out_x;
for (int y=cy1;y<=cy2;)
{
int x,count;
// while (f->next && f->y2<y)
// f=f->next;
uchar *rem=remap_line;
int todoy=4-((screeny+y)&3);
if (y+todoy>cy2)
todoy=cy2-y+1;
int calcy=((y+screeny)&(~3))-cy1;
if (suffix)
{
light_patch *lp=f;
for (;(lp->y1>y-cy1 || lp->y2<y-cy1 ||
lp->x1>suffix_x || lp->x2<suffix_x);lp=lp->next);
long caddr=(long)in_line+cx2-cx1+1-suffix;
long daddr=(long)out_line+(cx2-cx1+1-suffix)*2;
uchar *r=light_lookup+(((long)calc_light_value(lp,suffix_x+screenx,calcy)<<8));
switch (todoy)
{
case 4 :
{
MAP_2PUT(caddr,daddr,(long)r,suffix); daddr+=dscr_w;
MAP_2PUT(caddr,daddr,(long)r,suffix); daddr+=dscr_w; caddr+=scr_w;
}
case 3 :
{
MAP_2PUT(caddr,daddr,(long)r,suffix); daddr+=dscr_w;
MAP_2PUT(caddr,daddr,(long)r,suffix); daddr+=dscr_w; caddr+=scr_w;
}
case 2 :
{
MAP_2PUT(caddr,daddr,(long)r,suffix); daddr+=dscr_w;
MAP_2PUT(caddr,daddr,(long)r,suffix); daddr+=dscr_w; caddr+=scr_w;
}
case 1 :
{
MAP_2PUT(caddr,daddr,(long)r,suffix); daddr+=dscr_w;
MAP_2PUT(caddr,daddr,(long)r,suffix); daddr+=dscr_w; caddr+=scr_w;
} break;
}
}
if (prefix)
{
light_patch *lp=f;
for (;(lp->y1>y-cy1 || lp->y2<y-cy1 ||
lp->x1>prefix_x || lp->x2<prefix_x);lp=lp->next);
uchar *r=light_lookup+(((long)calc_light_value(lp,prefix_x+screenx,calcy)<<8));
long caddr=(long)in_line;
long daddr=(long)out_line;
switch (todoy)
{
case 4 :
{
MAP_2PUT(caddr,daddr,(long)r,prefix); daddr+=dscr_w;
MAP_2PUT(caddr,daddr,(long)r,prefix); daddr+=dscr_w; caddr+=scr_w;
}
case 3 :
{
MAP_2PUT(caddr,daddr,(long)r,prefix); daddr+=dscr_w;
MAP_2PUT(caddr,daddr,(long)r,prefix); daddr+=dscr_w; caddr+=scr_w;
}
case 2 :
{
MAP_2PUT(caddr,daddr,(long)r,prefix); daddr+=dscr_w;
MAP_2PUT(caddr,daddr,(long)r,prefix); daddr+=dscr_w; caddr+=scr_w;
}
case 1 :
{
MAP_2PUT(caddr,daddr,(long)r,prefix); daddr+=dscr_w;
MAP_2PUT(caddr,daddr,(long)r,prefix); daddr+=dscr_w; caddr+=scr_w;
} break;
}
in_line+=prefix;
out_line+=prefix*2;
}
for (x=prefix,count=0;count<remap_size;count++,x+=8,rem++)
{
light_patch *lp=f;
for (;(lp->y1>y-cy1 || lp->y2<y-cy1 || lp->x1>x || lp->x2<x);lp=lp->next);
*rem=calc_light_value(lp,x+screenx,calcy);
}
rem=remap_line;
put_8line(in_line,out_line,rem,light_lookup,count);
memcpy(out_line+dscr_w,out_line,count*16);
out_line+=dscr_w;
in_line+=scr_w; out_line+=dscr_w; y++; todoy--;
if (todoy)
{
put_8line(in_line,out_line,rem,light_lookup,count);
memcpy(out_line+dscr_w,out_line,count*16);
out_line+=dscr_w;
in_line+=scr_w; out_line+=dscr_w; y++; todoy--;
if (todoy)
{
put_8line(in_line,out_line,rem,light_lookup,count);
memcpy(out_line+dscr_w,out_line,count*16);
out_line+=dscr_w;
in_line+=scr_w; out_line+=dscr_w; y++; todoy--;
if (todoy)
{
put_8line(in_line,out_line,rem,light_lookup,count);
memcpy(out_line+dscr_w,out_line,count*16);
out_line+=dscr_w;
in_line+=scr_w; out_line+=dscr_w; y++;
}
}
}
in_line-=prefix;
out_line-=prefix*2;
}
while (first)
{
light_patch *p=first;
first=first->next;
delete p;
}
jfree(remap_line);
}
void add_light_spec(spec_directory *sd, char *level_name)
{
long size=4+4; // number of lights and minimum light levels
for (light_source *f=first_light_source;f;f=f->next)
size+=6*4+1;
sd->add_by_hand(new spec_entry(SPEC_LIGHT_LIST,"lights",NULL,size,0));
}
void write_lights(bFILE *fp)
{
int t=0;
light_source *f=first_light_source;
for (;f;f=f->next) t++;
fp->write_long(t);
fp->write_long(min_light_level);
for (f=first_light_source;f;f=f->next)
{
fp->write_long(f->x);
fp->write_long(f->y);
fp->write_long(f->xshift);
fp->write_long(f->yshift);
fp->write_long(f->inner_radius);
fp->write_long(f->outer_radius);
fp->write_byte(f->type);
}
}
void read_lights(spec_directory *sd, bFILE *fp, char *level_name)
{
delete_all_lights();
spec_entry *se=sd->find("lights");
if (se)
{
fp->seek(se->offset,SEEK_SET);
long t=fp->read_long();
min_light_level=fp->read_long();
light_source *last;
while (t)
{
t--;
long x=fp->read_long();
long y=fp->read_long();
long xshift=fp->read_long();
long yshift=fp->read_long();
long ir=fp->read_long();
long ora=fp->read_long();
long ty=fp->read_byte();
light_source *p=new light_source(ty,x,y,ir,ora,xshift,yshift,NULL);
if (first_light_source)
last->next=p;
else first_light_source=p;
last=p;
}
}
}