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/* Copyright (c) 1986 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* mt160r.c - program to dump pixel file to Mannesman-Tally 160. |
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* |
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*/ |
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#include <stdio.h> |
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#include <time.h> |
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#include "platform.h" |
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#include "color.h" |
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#include "resolu.h" |
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#define NCOLS 880 /* for wide carriage */ |
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#define NCOLS 880 /* for wide carriage */ |
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static int printp(char *fname); |
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static void plotscan(COLR scan[], int len, int y); |
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static int bit(COLR clr, int x); |
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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int |
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main( |
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int argc, |
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char *argv[] |
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) |
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{ |
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int i; |
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int status = 0; |
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SET_DEFAULT_BINARY(); |
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SET_FILE_BINARY(stdin); |
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SET_FILE_BINARY(stdout); |
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if (argc < 2) |
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status += printp(NULL) == -1; |
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else |
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} |
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printp(fname) /* print a picture */ |
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char *fname; |
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static int |
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printp( /* print a picture */ |
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char *fname |
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) |
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{ |
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FILE *input; |
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int xres, yres; |
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COLR scanline[NCOLS]; |
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int i; |
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if (fname == NULL) { |
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input = stdin; |
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fname = "<stdin>"; |
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return(-1); |
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} |
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/* discard header */ |
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getheader(input, NULL); |
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if (checkheader(input, COLRFMT, NULL) < 0) { |
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fprintf(stderr, "%s: not a Radiance picture\n", fname); |
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return(-1); |
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} |
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/* get picture dimensions */ |
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if (fgetresolu(&xres, &yres, input) != (YMAJOR|YDECR)) { |
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if (fgetresolu(&xres, &yres, input) < 0) { |
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fprintf(stderr, "%s: bad picture size\n", fname); |
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return(-1); |
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} |
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fprintf(stderr, "%s: read error (y=%d)\n", fname, i); |
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return(-1); |
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} |
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normcolrs(scanline, xres); |
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normcolrs(scanline, xres, 0); |
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plotscan(scanline, xres, i); |
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} |
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} |
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plotscan(scan, len, y) /* plot a scanline */ |
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COLR scan[]; |
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int len; |
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int y; |
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static void |
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plotscan( /* plot a scanline */ |
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COLR scan[], |
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int len, |
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int y |
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) |
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{ |
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static BYTE pat[NCOLS]; |
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int bpos; |
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register int i; |
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if (bpos = y & 7) { |
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if ((bpos = y & 7)) { |
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for (i = 0; i < len; i++) |
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pat[i] |= bit(scan[i], i) << bpos; |
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} |
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putchar('\r'); |
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putchar('\n'); |
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fflush(stdout); |
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} |
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} |
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bit(clr, x) /* return bit for color at x */ |
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COLR clr; |
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register int x; |
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static int |
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bit( /* return bit for color at x */ |
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COLR clr, |
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register int x |
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) |
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{ |
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static int cerr[NCOLS]; |
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static int err; |
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int b; |
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int b, errp; |
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register int isblack; |
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b = normbright(clr); |
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errp = err; |
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err += b + cerr[x]; |
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isblack = err < 128; |
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if (!isblack) err -= 256; |
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cerr[x] = err /= 2; |
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err /= 3; |
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cerr[x] = err + errp; |
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return(isblack); |
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} |
