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- /* Copyright (c) 1991 Regents of the University of California */
-
- #ifndef lint
- static char SCCSid[] = "@(#)paintjet.c 2.2 12/23/91 LBL";
- #endif
-
- /*
- * paintjet.c - program to dump pixel file to HP PaintJet color printer.
- *
- * 10/6/89
- */
-
- #include <stdio.h>
- #ifdef MSDOS
- #include <fcntl.h>
- #endif
-
- #include "color.h"
- #include "resolu.h"
-
- #define NCOLS 1440 /* 8" at 180 dpi */
-
-
- main(argc, argv)
- int argc;
- char *argv[];
- {
- int i, status = 0;
- #ifdef MSDOS
- extern int _fmode;
- _fmode = O_BINARY;
- setmode(fileno(stdin), O_BINARY);
- setmode(fileno(stdout), O_BINARY);
- #endif
- if (argc < 2)
- status = printp(NULL) == -1;
- else
- for (i = 1; i < argc; i++)
- status += printp(argv[i]) == -1;
- exit(status);
- }
-
-
- printp(fname) /* print a picture */
- char *fname;
- {
- FILE *input;
- int xres, yres;
- COLR scanline[NCOLS];
- int i;
-
- if (fname == NULL) {
- input = stdin;
- fname = "<stdin>";
- } else if ((input = fopen(fname, "r")) == NULL) {
- fprintf(stderr, "%s: cannot open\n", fname);
- return(-1);
- }
- /* discard header */
- if (checkheader(input, COLRFMT, NULL) < 0) {
- fprintf(stderr, "%s: not a Radiance picture\n", fname);
- return(-1);
- }
- /* get picture dimensions */
- if (fgetresolu(&xres, &yres, input) < 0) {
- fprintf(stderr, "%s: bad picture size\n", fname);
- return(-1);
- }
- if (xres > NCOLS) {
- fprintf(stderr, "%s: resolution mismatch\n", fname);
- return(-1);
- }
- /*
- * Set 180 dpi, 3 planes, left margin and width.
- */
- printf("\033*t180R\033*r3U\033&a%dH\033*r%dS\033*r1A",
- ((NCOLS-xres)>>4)<<5, xres);
-
- for (i = yres-1; i >= 0; i--) {
- if (freadcolrs(scanline, xres, input) < 0)
- return(-1);
- normcolrs(scanline, xres, 0);
- plotscan(scanline, xres, i);
- }
-
- printf("\033*r0B\f");
-
- fclose(input);
-
- return(0);
- }
-
-
- plotscan(scan, len, y) /* plot a scanline */
- COLR scan[];
- int len;
- int y;
- {
- int c;
- register int x, b;
-
- for (c = 0; c < 3; c++) {
- printf("\033*b%d%c", (len+7)>>3, c<2 ? 'V' : 'W');
- b = 0;
- for (x = 0; x < len; x++) {
- b = b<<1 | colbit(scan[x], x, c);
- if ((x&7) == 7) {
- putc(b, stdout);
- b = 0;
- }
- }
- if (x & 7)
- putc(b, stdout);
- }
- }
-
-
- colbit(col, x, a) /* determine bit value for primary at x */
- COLR col;
- register int x;
- register int a;
- {
- static int cerr[NCOLS][3];
- static int err[3];
- int b, errp;
- register int ison;
-
- b = col[a];
- errp = err[a];
- err[a] += b + cerr[x][a];
- ison = err[a] > 128;
- if (ison) err[a] -= 256;
- err[a] /= 3;
- cerr[x][a] = err[a] + errp;
- return(ison);
- }
-