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/* Copyright (c) 1989 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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* paintjet.c - program to dump pixel file to HP PaintJet color printer. |
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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 1440 /* 8" at 180 dpi */ |
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#define NCOLS 1440 /* 8" at 180 dpi */ |
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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 colbit(COLR col, int x, int a); |
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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, 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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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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for (i = yres-1; i >= 0; i--) { |
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if (freadcolrs(scanline, xres, input) < 0) |
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return(-1); |
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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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int c; |
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register int x, b; |
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} |
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colbit(col, x, a) /* determine bit value for primary at x */ |
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COLR col; |
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register int x; |
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register int a; |
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static int |
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colbit( /* determine bit value for primary at x */ |
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COLR col, |
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register int x, |
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register int a |
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) |
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{ |
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static int cerr[NCOLS][3]; |
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static int err[3]; |
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int b; |
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int b, errp; |
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register int ison; |
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b = col[a]; |
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errp = err[a]; |
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err[a] += b + cerr[x][a]; |
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ison = err[a] > 128; |
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if (ison) err[a] -= 256; |
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cerr[x][a] = err[a] /= 2; |
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err[a] /= 3; |
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cerr[x][a] = err[a] + errp; |
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return(ison); |
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} |
