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/* Copyright (c) 1991 Regents of the University of California */ |
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|
| 1 |
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#ifndef lint |
| 2 |
< |
static char SCCSid[] = "$SunId$ LBL"; |
| 2 |
> |
static const char RCSid[] = "$Id$"; |
| 3 |
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#endif |
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|
| 4 |
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/* |
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* Compute pixels for glare calculation |
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*/ |
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|
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#include "copyright.h" |
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|
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#include <stdlib.h> |
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#include <string.h> |
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|
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+ |
#include "rtprocess.h" /* Windows: must come first because of conflicts */ |
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#include "glare.h" |
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#include <sys/param.h> |
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/* compute rtrace buffer size */ |
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#ifndef PIPE_BUF |
| 15 |
– |
#define PIPE_BUF 512 /* hyperconservative */ |
| 16 |
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#endif |
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#define MAXPIX (PIPE_BUF/(6*sizeof(float)) - 1) |
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|
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< |
#ifndef BSD |
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< |
#define vfork fork |
| 21 |
< |
#endif |
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> |
/* maximum rtrace buffer size */ |
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> |
#define MAXPIX (4096/(6*sizeof(float))) |
| 18 |
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|
| 19 |
< |
#define NSCANS 64 /* number of scanlines to buffer */ |
| 19 |
> |
#define MAXSBUF 786432 /* maximum total size of scanline buffer */ |
| 20 |
> |
#define HSIZE 317 /* size of scanline hash table */ |
| 21 |
> |
#define NRETIRE 16 /* number of scanlines to retire at once */ |
| 22 |
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|
| 23 |
< |
int rt_pid = -1; /* process id for rtrace */ |
| 26 |
< |
int fd_tort, fd_fromrt; /* pipe descriptors */ |
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> |
static SUBPROC rt_pd = SP_INACTIVE; /* process id & descriptors for rtrace */ |
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|
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FILE *pictfp = NULL; /* picture file pointer */ |
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double exposure; /* picture exposure */ |
| 27 |
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int pxsiz, pysiz; /* picture dimensions */ |
| 28 |
< |
int curpos; /* current scanline */ |
| 29 |
< |
long *scanpos; /* scanline positions */ |
| 30 |
< |
struct { |
| 31 |
< |
long lused; /* for LRU replacement */ |
| 28 |
> |
|
| 29 |
> |
static int curpos; /* current scanline */ |
| 30 |
> |
static long *scanpos; /* scanline positions */ |
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> |
|
| 32 |
> |
typedef struct scan { |
| 33 |
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int y; /* scanline position */ |
| 34 |
< |
COLR *sl; /* scanline contents */ |
| 35 |
< |
} scan[NSCANS]; /* buffered scanlines */ |
| 34 |
> |
long lused; /* for LRU replacement */ |
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> |
struct scan *next; /* next in this hash or free list */ |
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> |
/* followed by the scanline data */ |
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> |
} SCAN; /* buffered scanline */ |
| 38 |
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|
| 39 |
+ |
#define scandata(sl) ((COLR *)((sl)+1)) |
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#define shash(y) ((y)%HSIZE) |
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+ |
|
| 42 |
+ |
static int maxpix; /* maximum number of pixels to buffer */ |
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|
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static SCAN *freelist; /* scanline free list */ |
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static SCAN *hashtab[HSIZE]; /* scanline hash table */ |
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|
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static long scanbufsiz; /* size of allocated scanline buffer */ |
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|
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static long ncall = 0L; /* number of calls to getpictscan */ |
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static long nread = 0L; /* number of scanlines read */ |
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+ |
static long nrecl = 0L; /* number of scanlines reclaimed */ |
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|
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< |
extern long ftell(); |
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> |
static int wrongformat = 0; |
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|
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+ |
static SCAN * claimscan(int y); |
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static COLR * getpictscan(int y); |
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static double pict_val(FVECT vd); |
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static void rt_compute(float *pb, int np); |
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static gethfunc getexpos; |
| 60 |
+ |
static SCAN * scanretire(void); |
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+ |
static void initscans(void); |
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+ |
static void donescans(void); |
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|
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< |
COLR * |
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< |
getpictscan(y) /* get picture scanline */ |
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< |
int y; |
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> |
|
| 65 |
> |
static SCAN * |
| 66 |
> |
claimscan( /* claim scanline from buffers */ |
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> |
int y |
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> |
) |
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{ |
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< |
int minused; |
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> |
int hi = shash(y); |
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> |
SCAN *slast; |
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> |
register SCAN *sl; |
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> |
|
| 74 |
> |
for (sl = hashtab[hi]; sl != NULL; sl = sl->next) |
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> |
if (sl->y == y) /* active scanline */ |
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return(sl); |
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> |
for (slast = NULL, sl = freelist; sl != NULL; slast = sl, sl = sl->next) |
| 78 |
> |
if (sl->y == -1 || sl->y == y || sl->next == NULL) { |
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> |
if (slast == NULL) /* remove from free */ |
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> |
freelist = sl->next; |
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> |
else |
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> |
slast->next = sl->next; |
| 83 |
> |
if (sl->y == y) { /* reclaim */ |
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> |
sl->next = hashtab[hi]; |
| 85 |
> |
hashtab[hi] = sl; |
| 86 |
> |
nrecl++; |
| 87 |
> |
} |
| 88 |
> |
return(sl); |
| 89 |
> |
} |
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> |
return(scanretire()); /* need more free scanlines */ |
| 91 |
> |
} |
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|
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> |
|
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> |
static COLR * |
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> |
getpictscan( /* get picture scanline */ |
| 96 |
> |
int y |
| 97 |
> |
) |
| 98 |
> |
{ |
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> |
register SCAN *sl; |
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register int i; |
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/* first check our buffers */ |
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< |
ncall++; |
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minused = 0; |
| 104 |
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for (i = 0; i < NSCANS; i++) { |
| 105 |
< |
if (scan[i].y == y) { |
| 106 |
< |
scan[i].lused = ncall; |
| 107 |
< |
return(scan[i].sl); |
| 108 |
< |
} |
| 59 |
< |
if (scan[i].lused < scan[minused].lused) |
| 60 |
< |
minused = i; |
| 61 |
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} |
| 62 |
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/* not there, read it in */ |
| 102 |
> |
sl = claimscan(y); |
| 103 |
> |
if (sl == NULL) |
| 104 |
> |
memerr("claimscan()"); |
| 105 |
> |
sl->lused = ncall++; |
| 106 |
> |
if (sl->y == y) /* scan hit */ |
| 107 |
> |
return(scandata(sl)); |
| 108 |
> |
/* else read in replacement */ |
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if (scanpos[y] < 0) { /* need to search */ |
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for (i = y+1; i < curpos; i++) |
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if (scanpos[i] >= 0) { |
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} |
| 117 |
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while (curpos >= y) { |
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scanpos[curpos] = ftell(pictfp); |
| 119 |
< |
if (freadcolrs(scan[minused].sl, pxsiz, pictfp) < 0) |
| 119 |
> |
if (freadcolrs(scandata(sl), pxsiz, pictfp) < 0) |
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goto readerr; |
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nread++; |
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curpos--; |
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} else { |
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if (curpos != y && fseek(pictfp, scanpos[y], 0) < 0) |
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goto seekerr; |
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< |
if (freadcolrs(scan[minused].sl, pxsiz, pictfp) < 0) |
| 127 |
> |
if (freadcolrs(scandata(sl), pxsiz, pictfp) < 0) |
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goto readerr; |
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nread++; |
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curpos = y-1; |
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} |
| 132 |
< |
scan[minused].lused = ncall; |
| 133 |
< |
scan[minused].y = y; |
| 134 |
< |
return(scan[minused].sl); |
| 132 |
> |
sl->y = y; |
| 133 |
> |
i = shash(y); /* add to hash list */ |
| 134 |
> |
sl->next = hashtab[i]; |
| 135 |
> |
hashtab[i] = sl; |
| 136 |
> |
return(scandata(sl)); |
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readerr: |
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fprintf(stderr, "%s: picture read error\n", progname); |
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exit(1); |
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|
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|
| 146 |
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#ifdef DEBUG |
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< |
pict_stats() /* print out picture read statistics */ |
| 147 |
> |
static void |
| 148 |
> |
pict_stats(void) /* print out picture read statistics */ |
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{ |
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static long lastcall = 0L; /* ncall at last report */ |
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static long lastread = 0L; /* nread at last report */ |
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+ |
static long lastrecl = 0L; /* nrecl at last report */ |
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|
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if (ncall == lastcall) |
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return; |
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< |
fprintf(stderr, "%s: %ld scanlines read in %ld calls\n", |
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< |
progname, nread-lastread, ncall-lastcall); |
| 156 |
> |
fprintf(stderr, "%s: %ld scanlines read (%ld reclaimed) in %ld calls\n", |
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> |
progname, nread-lastread, nrecl-lastrecl, ncall-lastcall); |
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lastcall = ncall; |
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lastread = nread; |
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+ |
lastrecl = nrecl; |
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} |
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#endif |
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|
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|
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< |
double |
| 166 |
< |
pict_val(vd) /* find picture value for view direction */ |
| 167 |
< |
FVECT vd; |
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> |
static double |
| 166 |
> |
pict_val( /* find picture value for view direction */ |
| 167 |
> |
FVECT vd |
| 168 |
> |
) |
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{ |
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FVECT pp; |
| 171 |
< |
double vpx, vpy, vpz; |
| 171 |
> |
FVECT ip; |
| 172 |
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COLOR res; |
| 173 |
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|
| 174 |
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if (pictfp == NULL) |
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pp[0] = pictview.vp[0] + vd[0]; |
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pp[1] = pictview.vp[1] + vd[1]; |
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pp[2] = pictview.vp[2] + vd[2]; |
| 179 |
< |
viewpixel(&vpx, &vpy, &vpz, &pictview, pp); |
| 180 |
< |
if (vpz <= FTINY || vpx < 0. || vpx >= 1. || vpy < 0. || vpy >= 1.) |
| 179 |
> |
viewloc(ip, &pictview, pp); |
| 180 |
> |
if (ip[2] <= FTINY || ip[0] < 0. || ip[0] >= 1. || |
| 181 |
> |
ip[1] < 0. || ip[1] >= 1.) |
| 182 |
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return(-1.0); |
| 183 |
< |
colr_color(res, getpictscan((int)(vpy*pysiz))[(int)(vpx*pxsiz)]); |
| 183 |
> |
colr_color(res, getpictscan((int)(ip[1]*pysiz))[(int)(ip[0]*pxsiz)]); |
| 184 |
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return(luminance(res)/exposure); |
| 185 |
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} |
| 186 |
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|
| 187 |
|
|
| 188 |
< |
double |
| 189 |
< |
getviewpix(vh, vv) /* compute single view pixel */ |
| 190 |
< |
int vh, vv; |
| 188 |
> |
extern double |
| 189 |
> |
getviewpix( /* compute single view pixel */ |
| 190 |
> |
int vh, |
| 191 |
> |
int vv |
| 192 |
> |
) |
| 193 |
|
{ |
| 194 |
|
FVECT dir; |
| 195 |
< |
float rt_buf[6]; |
| 195 |
> |
float rt_buf[12]; |
| 196 |
|
double res; |
| 197 |
|
|
| 198 |
|
if (compdir(dir, vh, vv) < 0) |
| 199 |
|
return(-1.0); |
| 200 |
+ |
npixinvw++; |
| 201 |
|
if ((res = pict_val(dir)) >= 0.0) |
| 202 |
|
return(res); |
| 203 |
< |
if (rt_pid == -1) |
| 203 |
> |
if (rt_pd.r == -1) { |
| 204 |
> |
npixmiss++; |
| 205 |
|
return(-1.0); |
| 206 |
+ |
} |
| 207 |
|
rt_buf[0] = ourview.vp[0]; |
| 208 |
|
rt_buf[1] = ourview.vp[1]; |
| 209 |
|
rt_buf[2] = ourview.vp[2]; |
| 215 |
|
} |
| 216 |
|
|
| 217 |
|
|
| 218 |
< |
getviewspan(vv, vb) /* compute a span of view pixels */ |
| 219 |
< |
int vv; |
| 220 |
< |
float *vb; |
| 218 |
> |
extern void |
| 219 |
> |
getviewspan( /* compute a span of view pixels */ |
| 220 |
> |
int vv, |
| 221 |
> |
float *vb |
| 222 |
> |
) |
| 223 |
|
{ |
| 224 |
|
float rt_buf[6*MAXPIX]; /* rtrace send/receive buffer */ |
| 225 |
|
register int n; /* number of pixels in buffer */ |
| 234 |
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#endif |
| 235 |
|
n = 0; |
| 236 |
|
for (vh = -hsize; vh <= hsize; vh++) { |
| 237 |
< |
if (compdir(dir, vh, vv) < 0) { /* off viewable region */ |
| 237 |
> |
if (compdir(dir, vh, vv) < 0) { /* not in view */ |
| 238 |
|
vb[vh+hsize] = -1.0; |
| 239 |
|
continue; |
| 240 |
|
} |
| 241 |
+ |
npixinvw++; |
| 242 |
|
if ((vb[vh+hsize] = pict_val(dir)) >= 0.0) |
| 243 |
|
continue; |
| 244 |
< |
if (rt_pid == -1) /* missing information */ |
| 244 |
> |
if (rt_pd.r == -1) { /* missing information */ |
| 245 |
> |
npixmiss++; |
| 246 |
|
continue; |
| 247 |
+ |
} |
| 248 |
|
/* send to rtrace */ |
| 249 |
< |
if (n >= MAXPIX) { /* flush */ |
| 249 |
> |
if (n >= maxpix) { /* flush */ |
| 250 |
|
rt_compute(rt_buf, n); |
| 251 |
|
while (n-- > 0) |
| 252 |
|
vb[buf_vh[n]+hsize] = luminance(rt_buf+3*n); |
| 271 |
|
} |
| 272 |
|
|
| 273 |
|
|
| 274 |
< |
rt_compute(pb, np) /* process buffer through rtrace */ |
| 275 |
< |
float *pb; |
| 276 |
< |
int np; |
| 274 |
> |
static void |
| 275 |
> |
rt_compute( /* process buffer through rtrace */ |
| 276 |
> |
float *pb, |
| 277 |
> |
int np |
| 278 |
> |
) |
| 279 |
|
{ |
| 215 |
– |
static float nbuf[6] = {0.,0.,0.,0.,0.,0.}; |
| 216 |
– |
|
| 280 |
|
#ifdef DEBUG |
| 281 |
|
if (verbose && np > 1) |
| 282 |
|
fprintf(stderr, "%s: sending %d samples to rtrace...\n", |
| 283 |
|
progname, np); |
| 284 |
|
#endif |
| 285 |
< |
if (writebuf(fd_tort,(char *)pb,6*sizeof(float)*np) < 6*sizeof(float)*np |
| 286 |
< |
|| writebuf(fd_tort,(char *)nbuf,sizeof(nbuf)) < sizeof(nbuf)) { |
| 287 |
< |
fprintf(stderr, "%s: error writing to rtrace process\n", |
| 285 |
> |
memset(pb+6*np, '\0', 6*sizeof(float)); |
| 286 |
> |
if (process(&rt_pd, (char *)pb, (char *)pb, 3*sizeof(float)*(np+1), |
| 287 |
> |
6*sizeof(float)*(np+1)) < 3*sizeof(float)*(np+1)) { |
| 288 |
> |
fprintf(stderr, "%s: rtrace communication error\n", |
| 289 |
|
progname); |
| 290 |
|
exit(1); |
| 291 |
|
} |
| 228 |
– |
if (readbuf(fd_fromrt, (char *)pb, 3*sizeof(float)*np) |
| 229 |
– |
< 3*sizeof(float)*np) { |
| 230 |
– |
fprintf(stderr, "%s: error reading from rtrace process\n", |
| 231 |
– |
progname); |
| 232 |
– |
exit(1); |
| 233 |
– |
} |
| 292 |
|
} |
| 293 |
|
|
| 294 |
|
|
| 295 |
< |
getexpos(s) /* get exposure from header line */ |
| 296 |
< |
char *s; |
| 295 |
> |
static int |
| 296 |
> |
getexpos( /* get exposure from header line */ |
| 297 |
> |
char *s, |
| 298 |
> |
void *p |
| 299 |
> |
) |
| 300 |
|
{ |
| 301 |
+ |
char fmt[32]; |
| 302 |
+ |
|
| 303 |
|
if (isexpos(s)) |
| 304 |
|
exposure *= exposval(s); |
| 305 |
+ |
else if (isformat(s)) { |
| 306 |
+ |
formatval(fmt, s); |
| 307 |
+ |
wrongformat = strcmp(fmt, COLRFMT); |
| 308 |
+ |
} |
| 309 |
+ |
return(0); |
| 310 |
|
} |
| 311 |
|
|
| 312 |
|
|
| 313 |
< |
open_pict(fn) /* open picture file */ |
| 314 |
< |
char *fn; |
| 313 |
> |
extern void |
| 314 |
> |
open_pict( /* open picture file */ |
| 315 |
> |
char *fn |
| 316 |
> |
) |
| 317 |
|
{ |
| 248 |
– |
register int i; |
| 249 |
– |
|
| 318 |
|
if ((pictfp = fopen(fn, "r")) == NULL) { |
| 319 |
< |
fprintf("%s: cannot open\n", fn); |
| 319 |
> |
fprintf(stderr, "%s: cannot open\n", fn); |
| 320 |
|
exit(1); |
| 321 |
|
} |
| 322 |
|
exposure = 1.0; |
| 323 |
< |
getheader(pictfp, getexpos); |
| 324 |
< |
if (fgetresolu(&pxsiz, &pysiz, pictfp) != (YMAJOR|YDECR)) { |
| 325 |
< |
fprintf("%s: bad picture resolution\n", fn); |
| 323 |
> |
getheader(pictfp, getexpos, NULL); |
| 324 |
> |
if (wrongformat || !fscnresolu(&pxsiz, &pysiz, pictfp)) { |
| 325 |
> |
fprintf(stderr, "%s: incompatible picture format\n", fn); |
| 326 |
|
exit(1); |
| 327 |
|
} |
| 328 |
< |
scanpos = (long *)malloc(pysiz*sizeof(long)); |
| 261 |
< |
if (scanpos == NULL) |
| 262 |
< |
memerr("scanline positions"); |
| 263 |
< |
for (i = pysiz-1; i >= 0; i--) |
| 264 |
< |
scanpos[i] = -1L; |
| 265 |
< |
curpos = pysiz-1; |
| 266 |
< |
for (i = 0; i < NSCANS; i++) { |
| 267 |
< |
scan[i].lused = -1; |
| 268 |
< |
scan[i].y = -1; |
| 269 |
< |
scan[i].sl = (COLR *)malloc(pxsiz*sizeof(COLR)); |
| 270 |
< |
if (scan[i].sl == NULL) |
| 271 |
< |
memerr("scanline buffers"); |
| 272 |
< |
} |
| 328 |
> |
initscans(); |
| 329 |
|
} |
| 330 |
|
|
| 331 |
|
|
| 332 |
< |
close_pict() /* done with picture */ |
| 332 |
> |
extern void |
| 333 |
> |
close_pict(void) /* done with picture */ |
| 334 |
|
{ |
| 278 |
– |
register int i; |
| 279 |
– |
|
| 335 |
|
if (pictfp == NULL) |
| 336 |
|
return; |
| 337 |
|
fclose(pictfp); |
| 338 |
< |
free((char *)scanpos); |
| 284 |
< |
for (i = 0; i < NSCANS; i++) |
| 285 |
< |
free((char *)scan[i].sl); |
| 338 |
> |
donescans(); |
| 339 |
|
pictfp = NULL; |
| 340 |
|
} |
| 341 |
|
|
| 342 |
|
|
| 343 |
< |
fork_rtrace(av) /* open pipe and start rtrace */ |
| 344 |
< |
char *av[]; |
| 343 |
> |
extern void |
| 344 |
> |
fork_rtrace( /* open pipe and start rtrace */ |
| 345 |
> |
char *av[] |
| 346 |
> |
) |
| 347 |
|
{ |
| 348 |
< |
int p0[2], p1[2]; |
| 348 |
> |
int rval; |
| 349 |
|
|
| 350 |
< |
if (pipe(p0) < 0 || pipe(p1) < 0) { |
| 350 |
> |
rval = open_process(&rt_pd, av); |
| 351 |
> |
if (rval < 0) { |
| 352 |
|
perror(progname); |
| 353 |
|
exit(1); |
| 354 |
|
} |
| 355 |
< |
if ((rt_pid = vfork()) == 0) { /* if child */ |
| 356 |
< |
close(p0[1]); |
| 301 |
< |
close(p1[0]); |
| 302 |
< |
if (p0[0] != 0) { /* connect p0 to stdin */ |
| 303 |
< |
dup2(p0[0], 0); |
| 304 |
< |
close(p0[0]); |
| 305 |
< |
} |
| 306 |
< |
if (p1[1] != 0) { /* connect p1 to stdout */ |
| 307 |
< |
dup2(p1[1], 1); |
| 308 |
< |
close(p1[1]); |
| 309 |
< |
} |
| 310 |
< |
execvp(av[0], av); |
| 311 |
< |
perror(av[0]); |
| 312 |
< |
_exit(127); |
| 313 |
< |
} |
| 314 |
< |
if (rt_pid == -1) { |
| 315 |
< |
perror(progname); |
| 355 |
> |
if (rval == 0) { |
| 356 |
> |
fprintf(stderr, "%s: command not found\n", av[0]); |
| 357 |
|
exit(1); |
| 358 |
|
} |
| 359 |
< |
close(p0[0]); |
| 360 |
< |
close(p1[1]); |
| 361 |
< |
fd_tort = p0[1]; |
| 362 |
< |
fd_fromrt = p1[0]; |
| 359 |
> |
maxpix = rval/(6*sizeof(float)); |
| 360 |
> |
if (maxpix > MAXPIX) |
| 361 |
> |
maxpix = MAXPIX; |
| 362 |
> |
maxpix--; |
| 363 |
|
} |
| 364 |
|
|
| 365 |
|
|
| 366 |
< |
done_rtrace() /* wait for rtrace to finish */ |
| 366 |
> |
extern void |
| 367 |
> |
done_rtrace(void) /* wait for rtrace to finish */ |
| 368 |
|
{ |
| 369 |
< |
int pid, status; |
| 369 |
> |
int status; |
| 370 |
|
|
| 371 |
< |
if (rt_pid == -1) |
| 372 |
< |
return; |
| 331 |
< |
close(fd_tort); |
| 332 |
< |
close(fd_fromrt); |
| 333 |
< |
while ((pid = wait(&status)) != -1 && pid != rt_pid) |
| 334 |
< |
; |
| 335 |
< |
if (pid == rt_pid && status != 0) { |
| 371 |
> |
status = close_process(&rt_pd); |
| 372 |
> |
if (status > 0) { |
| 373 |
|
fprintf(stderr, "%s: bad status (%d) from rtrace\n", |
| 374 |
|
progname, status); |
| 375 |
|
exit(1); |
| 376 |
|
} |
| 377 |
< |
rt_pid = -1; |
| 377 |
> |
rt_pd.r = -1; |
| 378 |
|
} |
| 379 |
|
|
| 380 |
|
|
| 381 |
< |
int |
| 382 |
< |
readbuf(fd, bpos, siz) |
| 346 |
< |
int fd; |
| 347 |
< |
char *bpos; |
| 348 |
< |
int siz; |
| 381 |
> |
static SCAN * |
| 382 |
> |
scanretire(void) /* retire old scanlines to free list */ |
| 383 |
|
{ |
| 384 |
< |
register int cc, nrem = siz; |
| 385 |
< |
|
| 386 |
< |
while (nrem > 0 && (cc = read(fd, bpos, nrem)) > 0) { |
| 387 |
< |
bpos += cc; |
| 388 |
< |
nrem -= cc; |
| 384 |
> |
SCAN *sold[NRETIRE]; |
| 385 |
> |
int n; |
| 386 |
> |
int h; |
| 387 |
> |
register SCAN *sl; |
| 388 |
> |
register int i; |
| 389 |
> |
/* grab the NRETIRE oldest scanlines */ |
| 390 |
> |
sold[n = 0] = NULL; |
| 391 |
> |
for (h = 0; h < HSIZE; h++) |
| 392 |
> |
for (sl = hashtab[h]; sl != NULL; sl = sl->next) { |
| 393 |
> |
for (i = n; i && sold[i-1]->lused > sl->lused; i--) |
| 394 |
> |
if (i < NRETIRE) |
| 395 |
> |
sold[i] = sold[i-1]; |
| 396 |
> |
if (i < NRETIRE) { |
| 397 |
> |
sold[i] = sl; |
| 398 |
> |
if (n < NRETIRE) /* grow list */ |
| 399 |
> |
n++; |
| 400 |
> |
} |
| 401 |
> |
} |
| 402 |
> |
/* put scanlines into free list */ |
| 403 |
> |
for (i = 0; i < n; i++) { |
| 404 |
> |
h = shash(sold[i]->y); |
| 405 |
> |
sl = hashtab[h]; |
| 406 |
> |
if (sl == sold[i]) |
| 407 |
> |
hashtab[h] = sl->next; |
| 408 |
> |
else { |
| 409 |
> |
while (sl->next != sold[i]) /* IS in list */ |
| 410 |
> |
sl = sl->next; |
| 411 |
> |
sl->next = sold[i]->next; |
| 412 |
> |
} |
| 413 |
> |
if (i > 0) { /* save oldest as return value */ |
| 414 |
> |
sold[i]->next = freelist; |
| 415 |
> |
freelist = sold[i]; |
| 416 |
> |
} |
| 417 |
|
} |
| 418 |
< |
if (cc < 0) |
| 357 |
< |
return(cc); |
| 358 |
< |
return(siz-nrem); |
| 418 |
> |
return(sold[0]); |
| 419 |
|
} |
| 420 |
|
|
| 421 |
|
|
| 422 |
< |
int |
| 363 |
< |
writebuf(fd, bpos, siz) |
| 364 |
< |
char *bpos; |
| 365 |
< |
int siz; |
| 366 |
< |
{ |
| 367 |
< |
register int cc, nrem = siz; |
| 422 |
> |
static char *scan_buf; |
| 423 |
|
|
| 424 |
< |
while (nrem > 0 && (cc = write(fd, bpos, nrem)) > 0) { |
| 425 |
< |
bpos += cc; |
| 426 |
< |
nrem -= cc; |
| 424 |
> |
|
| 425 |
> |
static void |
| 426 |
> |
initscans(void) /* initialize scanline buffers */ |
| 427 |
> |
{ |
| 428 |
> |
int scansize; |
| 429 |
> |
register SCAN *ptr; |
| 430 |
> |
register int i; |
| 431 |
> |
/* initialize positions */ |
| 432 |
> |
scanpos = (long *)bmalloc(pysiz*sizeof(long)); |
| 433 |
> |
if (scanpos == NULL) |
| 434 |
> |
memerr("scanline positions"); |
| 435 |
> |
for (i = pysiz-1; i >= 0; i--) |
| 436 |
> |
scanpos[i] = -1L; |
| 437 |
> |
curpos = pysiz-1; |
| 438 |
> |
/* clear hash table */ |
| 439 |
> |
for (i = 0; i < HSIZE; i++) |
| 440 |
> |
hashtab[i] = NULL; |
| 441 |
> |
/* allocate scanline buffers */ |
| 442 |
> |
scansize = sizeof(SCAN) + pxsiz*sizeof(COLR); |
| 443 |
> |
#ifdef ALIGNT |
| 444 |
> |
scansize = scansize+(sizeof(ALIGNT)-1) & ~(sizeof(ALIGNT)-1); |
| 445 |
> |
#endif |
| 446 |
> |
i = MAXSBUF / scansize; /* compute number to allocate */ |
| 447 |
> |
if (i > HSIZE) |
| 448 |
> |
i = HSIZE; |
| 449 |
> |
scanbufsiz = i*scansize; |
| 450 |
> |
scan_buf = bmalloc(scanbufsiz); /* get in one big chunk */ |
| 451 |
> |
if (scan_buf == NULL) |
| 452 |
> |
memerr("scanline buffers"); |
| 453 |
> |
ptr = (SCAN *)scan_buf; |
| 454 |
> |
freelist = NULL; /* build our free list */ |
| 455 |
> |
while (i-- > 0) { |
| 456 |
> |
ptr->y = -1; |
| 457 |
> |
ptr->lused = -1; |
| 458 |
> |
ptr->next = freelist; |
| 459 |
> |
freelist = ptr; |
| 460 |
> |
ptr = (SCAN *)((char *)ptr + scansize); /* beware of C bugs */ |
| 461 |
|
} |
| 462 |
< |
if (cc < 0) |
| 463 |
< |
return(cc); |
| 464 |
< |
return(siz-nrem); |
| 462 |
> |
} |
| 463 |
> |
|
| 464 |
> |
|
| 465 |
> |
static void |
| 466 |
> |
donescans(void) /* free up scanlines */ |
| 467 |
> |
{ |
| 468 |
> |
bfree(scan_buf, scanbufsiz); |
| 469 |
> |
bfree((char *)scanpos, pysiz*sizeof(long)); |
| 470 |
|
} |
