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/* pbmto10x.c - read a portable bitmap and produce a Gemini 10X printer file
**
** Copyright (C) 1990, 1994 by Ken Yap
**
** 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.
**
** Modified to shorten stripes and eliminate blank stripes. Dec 1994.
*/
#include <stdbool.h>
#include "pbm.h"
#include "mallocvar.h"
#define LOW_RES_ROWS 8 /* printed per pass */
#define HIGH_RES_ROWS 16 /* printed per pass */
static void
outstripe(char * const stripe,
char * const sP,
int const reschar) {
char * p;
p = sP; /* initial value */
/* scan backwards, removing empty columns */
while (p != stripe)
if (*--p != 0) {
++p;
break;
}
{
unsigned int const ncols = p - stripe;
if (ncols > 0) {
printf("\033%c%c%c", reschar, ncols % 256, ncols / 256);
fwrite(stripe, sizeof(char), ncols, stdout);
}
}
putchar('\n'); /* flush buffer */
}
static void
res_60x72(FILE * const ifP,
int const rows,
int const cols,
int const format) {
int row;
unsigned int i;
bit * bitrows[LOW_RES_ROWS];
char *stripe;
char *sP;
MALLOCARRAY(stripe, cols);
if (stripe == NULL)
pm_error("Unable to allocate %u bytes for a stripe buffer.",
(unsigned)(cols * sizeof(stripe[0])));
for (i = 0; i < LOW_RES_ROWS; ++i)
bitrows[i] = pbm_allocrow(cols);
printf("\033A\010"); /* '\n' = 8/72 */
for (row = 0, sP = stripe; row < rows; row += LOW_RES_ROWS, sP = stripe) {
unsigned int col;
unsigned int i;
unsigned int npins;
bit * bP[LOW_RES_ROWS];
if (row + LOW_RES_ROWS <= rows)
npins = LOW_RES_ROWS;
else
npins = rows - row;
for (i = 0; i < npins; ++i)
pbm_readpbmrow(ifP, bP[i] = bitrows[i], cols, format);
for (col = 0; col < cols; ++col) {
unsigned int item;
item = 0;
for (i = 0; i < npins; ++i)
if (*(bP[i]++) == PBM_BLACK)
item |= 1 << (7 - i);
*sP++ = item;
}
outstripe(stripe, sP, 'K');
}
printf("\033@");
for (i = 0; i < LOW_RES_ROWS; ++i)
pbm_freerow(bitrows[i]);
free(stripe);
}
static void
res_120x144(FILE * const ifP,
int const rows,
int const cols,
int const format) {
unsigned int i;
int row;
char *stripe;
char * sP;
bit * bitrows[HIGH_RES_ROWS];
MALLOCARRAY(stripe, cols);
if (stripe == NULL)
pm_error("Unable to allocate %u bytes for a stripe buffer.",
(unsigned)(cols * sizeof(stripe[0])));
for (i = 0; i < HIGH_RES_ROWS; ++i)
bitrows[i] = pbm_allocrow(cols);
printf("\0333\001"); /* \n = 1/144" */
for (row = 0, sP = stripe; row < rows; row += HIGH_RES_ROWS, sP = stripe) {
unsigned int i;
unsigned int col;
bit * bP[HIGH_RES_ROWS];
unsigned int npins;
if (row + HIGH_RES_ROWS <= rows)
npins = HIGH_RES_ROWS;
else
npins = rows - row;
for (i = 0; i < npins; ++i)
pbm_readpbmrow(ifP, bP[i] = bitrows[i], cols, format);
for (col = 0; col < cols; ++col) {
unsigned int pin;
unsigned int item;
item = 0;
/* even rows */
for (pin = i = 0; i < npins; i += 2, ++pin)
if (*(bP[i]++) == PBM_BLACK)
item |= 1 << (7 - pin);
*sP++ = item;
}
outstripe(stripe, sP, 'L');
for (col = 0, sP = stripe; col < cols; ++col) {
unsigned int pin;
unsigned int item;
item = 0;
/* odd rows */
for (i = 1, pin = 0; i < npins; i += 2, ++pin)
if (*(bP[i]++) == PBM_BLACK)
item |= 1 << (7 - pin);
*sP++ = item;
}
outstripe(stripe, sP, 'L');
printf("\033J\016"); /* 14/144 down, \n did 1/144 */
}
printf("\033@");
for (i = 0; i < LOW_RES_ROWS; ++i)
pbm_freerow(bitrows[i]);
free(stripe);
}
int
main(int argc, const char ** argv) {
const char * fname;
static FILE * ifP;
int rows, cols, format;
bool isHighRes;
pm_proginit(&argc, argv);
isHighRes = false; /* initial assumption */
if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'h') {
isHighRes = true;
--argc;
++argv;
}
if (argc-1 > 1)
pm_error("Too many arguments. Only argument is file name");
else if (argc-1 == 1)
fname = argv[1];
else
fname = "-";
ifP = pm_openr(fname);
pbm_readpbminit(ifP, &cols, &rows, &format);
if (isHighRes)
res_120x144(ifP, rows, cols, format);
else
res_60x72(ifP, rows, cols, format);
pm_close(ifP);
return 0;
}
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