ViewVC Help
View File | Revision Log | Show Annotations | Download File | Root Listing
root/radiance/ray/src/px/paintjet.c
(Generate patch)

Comparing ray/src/px/paintjet.c (file contents):
Revision 1.2 by greg, Fri Oct 20 16:44:37 1989 UTC vs.
Revision 1.7 by greg, Mon Nov 11 14:01:36 1991 UTC

# Line 1 | Line 1
1 < /* Copyright (c) 1989 Regents of the University of California */
1 > /* Copyright (c) 1991 Regents of the University of California */
2  
3   #ifndef lint
4   static char SCCSid[] = "$SunId$ LBL";
# Line 13 | Line 13 | static char SCCSid[] = "$SunId$ LBL";
13   #include  <stdio.h>
14  
15   #include  "color.h"
16 + #include  "resolu.h"
17  
18   #define  NCOLS          1440            /* 8" at 180 dpi */
19  
# Line 48 | Line 49 | char  *fname;
49                  return(-1);
50          }
51                                  /* discard header */
52 <        getheader(input, NULL);
52 >        if (checkheader(input, COLRFMT, NULL) < 0) {
53 >                fprintf(stderr, "%s: not a Radiance picture\n", fname);
54 >                return(-1);
55 >        }
56                                  /* get picture dimensions */
57 <        if (fgetresolu(&xres, &yres, input) != (YMAJOR|YDECR)) {
57 >        if (fgetresolu(&xres, &yres, input) < 0) {
58                  fprintf(stderr, "%s: bad picture size\n", fname);
59                  return(-1);
60          }
# Line 67 | Line 71 | char  *fname;
71          for (i = yres-1; i >= 0; i--) {
72                  if (freadcolrs(scanline, xres, input) < 0)
73                          return(-1);
74 <                normscan(scanline, xres);
74 >                normcolrs(scanline, xres, 0);
75                  plotscan(scanline, xres, i);
76          }
77  
# Line 79 | Line 83 | char  *fname;
83   }
84  
85  
82 – normscan(scan, len)                     /* normalize a scanline */
83 – register COLR  scan[];
84 – int  len;
85 – {
86 –        register int  i;
87 –
88 –        for (i = 0; i < len; i++)
89 –                colr_norm(scan[i], scan[i]);
90 – }
91 –
92 –
86   plotscan(scan, len, y)                  /* plot a scanline */
87   COLR  scan[];
88   int  len;
# Line 120 | Line 113 | register int  x;
113   register int  a;
114   {
115          static int  cerr[NCOLS][3];
116 <        static int  err[3];
116 >        static int  err[3], errp[3];
117          int  b;
118          register int  ison;
119  
120          b = col[a];
121 +        errp[a] = err[a];
122          err[a] += b + cerr[x][a];
123          ison = err[a] > 128;
124          if (ison) err[a] -= 256;
125 <        cerr[x][a] = err[a] /= 2;
125 >        err[a] /= 3;
126 >        cerr[x][a] = err[a] + errp[a];
127          return(ison);
128   }

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines