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/* pnmtile.c - replicate a portable anymap into a specified size
**
** Copyright (C) 1989 by Jef Poskanzer.
**
** 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 "pm_c_util.h"
#include "mallocvar.h"
#include "shhopt.h"
#include "pnm.h"
struct cmdlineInfo {
/* All the information the user supplied in the command line,
in a form easy for the program to use.
*/
const char * inputFileName;
unsigned int width;
unsigned int height;
};
static void
parseCommandLine(int argc, const char ** argv,
struct cmdlineInfo * const cmdlineP) {
/*----------------------------------------------------------------------------
Note that the file spec array we return is stored in the storage that
was passed to us as the argv array.
-----------------------------------------------------------------------------*/
optEntry *option_def;
/* Instructions to OptParseOptions3 on how to parse our options.
*/
optStruct3 opt;
unsigned int option_def_index;
MALLOCARRAY_NOFAIL(option_def, 100);
option_def_index = 0; /* incremented by OPTENT3 */
opt.opt_table = option_def;
opt.short_allowed = FALSE; /* We have no short (old-fashioned) options */
opt.allowNegNum = FALSE; /* We have no parms that are negative numbers */
OPTENTINIT;
optParseOptions3(&argc, (char**)argv, opt, sizeof opt, 0);
/* Uses and sets argc, argv, and some of *cmdlineP and others. */
if (argc-1 < 2)
pm_error("You must specify at least two parameters: "
"width and height. You specified %u",
argc-1);
else {
cmdlineP->width = pm_parse_width(argv[1]);
cmdlineP->height = pm_parse_height(argv[2]);
if (argc-1 > 2) {
cmdlineP->inputFileName = argv[3];
if (argc-1 > 3)
pm_error("There are at most three arguments: "
"width, height, file name. You specified %u",
argc-1);
} else
cmdlineP->inputFileName = "-";
}
}
int
main(int argc, const char ** argv) {
struct cmdlineInfo cmdline;
FILE * ifP;
xel ** xels;
xel * xelrow;
xelval maxval;
int rows, cols;
int format;
unsigned int row;
pm_proginit(&argc, argv);
parseCommandLine(argc, argv, &cmdline);
ifP = pm_openr(cmdline.inputFileName);
xels = pnm_readpnm(ifP, &cols, &rows, &maxval, &format);
pm_close(ifP);
xelrow = pnm_allocrow(cmdline.width);
pnm_writepnminit(stdout, cmdline.width, cmdline.height, maxval, format, 0);
for (row = 0; row < cmdline.height; ++row) {
unsigned int col;
for (col = 0; col < cmdline.width; ++col)
xelrow[col] = xels[row % rows][col % cols];
pnm_writepnmrow(stdout, xelrow, cmdline.width, maxval, format, 0);
}
pm_close(stdout);
return 0;
}
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