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/* pnmtosir.c - read a portable anymap and produce a Solitaire Image Recorder
** file (MGI TYPE 11 or MGI TYPE 17)
**
** Copyright (C) 1991 by Marvin Landis
**
** Permission to use, copy, modify, and distribute this software and its
** documentation for any purpose and without fee is hereby granted, provided
** that the above copyright notice appear in all copies and that both that
** copyright notice and this permission notice appear in supporting
** documentation. This software is provided "as is" without express or
** implied warranty.
*/
#include <stdbool.h>
#include "pnm.h"
#define MAXCOLORS 256
int
main(int argc, const char * argv[]) {
FILE * ifP;
xel ** xels;
int rows, cols, format;
unsigned int n;
bool isGrayscale;
xelval maxval;
unsigned short Header[16];
unsigned short LutHeader[16];
unsigned short Lut[2048];
pm_proginit(&argc, argv);
if (argc-1 > 1)
pm_error("There is only one possible argument: the input file. "
"You specified %d", argc-1);
if (argc-1 > 0) {
const char * const inputFileName = argv[1];
ifP = pm_openr(inputFileName);
} else {
ifP = stdin;
}
xels = pnm_readpnm(ifP, &cols, &rows, &maxval, &format);
/* Figure out the colormap. */
switch (PNM_FORMAT_TYPE(format) ) {
case PPM_TYPE:
isGrayscale = false;
pm_message("Writing a 24-bit SIR format (MGI TYPE 11)");
break;
case PGM_TYPE:
isGrayscale = true;
pm_message("Writing a grayscale SIR format (MGI TYPE 17)");
break;
default:
isGrayscale = true;
pm_message("Writing a monochrome SIR format (MGI TYPE 17)");
break;
}
/* Set up the header. */
Header[0] = 0x3a4f;
Header[1] = 0;
if (isGrayscale)
Header[2] = 17;
else
Header[2] = 11;
Header[3] = cols;
Header[4] = rows;
Header[5] = 0;
Header[6] = 1;
Header[7] = 6;
Header[8] = 0;
Header[9] = 0;
for (n = 0; n < 10; n++)
pm_writelittleshort(stdout,Header[n]);
for (n = 10; n < 256; n++)
pm_writelittleshort(stdout,0);
/* Create color map */
LutHeader[0] = 0x1524;
LutHeader[1] = 0;
LutHeader[2] = 5;
LutHeader[3] = 256;
LutHeader[4] = 256;
for (n = 0; n < 5; ++n)
pm_writelittleshort(stdout,LutHeader[n]);
for (n = 5; n < 256; ++n)
pm_writelittleshort(stdout,0);
for (n = 0; n < 3; ++n) {
unsigned int m;
for (m = 0; m < 256; ++m)
Lut[m * 4 + n] = m << 8;
}
for (n = 0; n < 1024; ++n)
pm_writelittleshort(stdout,Lut[n]);
/* Finally, write out the data. */
switch (PNM_FORMAT_TYPE(format)) {
case PPM_TYPE: {
unsigned int row;
for (row = 0; row < rows; ++row) {
unsigned int col;
for (col = 0; col < cols; ++col) {
unsigned char const ub =
(char) (PPM_GETR(xels[row][col]) * (255 / maxval));
fputc(ub, stdout);
}
}
for (row = 0; row < rows; ++row) {
unsigned int col;
for (col = 0; col < cols; ++col) {
unsigned const char ub =
(char) (PPM_GETG(xels[row][col]) * (255 / maxval));
fputc(ub, stdout);
}
}
for (row = 0; row < rows; ++row) {
unsigned int col;
for (col = 0; col < cols; ++col) {
unsigned const char ub =
(char) (PPM_GETB(xels[row][col]) * (255 / maxval));
fputc(ub, stdout);
}
}
} break;
default: {
unsigned int row;
for (row = 0; row < rows; ++row) {
unsigned int col;
for (col = 0; col < cols; ++col) {
unsigned long const val = PNM_GET1(xels[row][col]);
unsigned const char ub = (char) (val * (255 / maxval));
fputc(ub, stdout);
}
}
} break;
}
pm_close(ifP);
return 0;
}
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