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/*
* pcl.c -- printing the "partial" bar encoding in PCL format
*
* Copyright (c) 1999 Alessandro Rubini (rubini@gnu.org)
* Copyright (c) 1999 Prosa Srl. (prosa@prosa.it)
* Copyright (c) 2001 Andrea Scopece (a.scopece@tin.it)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include "barcode.h"
#define SHRINK_AMOUNT 0.15 /* shrink the bars to account for ink spreading */
/*
* How do the "partial" and "textinfo" strings work? See file "ps.c"
*/
int Barcode_pcl_print(struct Barcode_Item *bc, FILE *f)
{
int i, j, k, barlen;
double f1, f2, fsav=0;
int mode = '-'; /* text below bars */
double scalef=1, xpos, x0, y0, yr;
unsigned char *ptr;
unsigned char c;
char font_id[6]; /* default font, should be "scalable" */
/* 0 Line printer, use on older LJet II, isn't scalable */
/* 4148 Univers, use on LJet III series, and Lj 4L, 5L */
/* 16602 Arial, default LJ family 4, 5, 6, Color, Djet */
if (!bc->partial || !bc->textinfo) {
bc->error = EINVAL;
return -1;
}
/*
* Maybe this first part can be made common to several printing back-ends,
* we'll see how that works when other ouput engines are added
*/
/* First, calculate barlen */
barlen = bc->partial[0] - '0';
for (ptr = bc->partial+1; *ptr; ptr++)
if (isdigit(*ptr))
barlen += (*ptr - '0');
else if (islower(*ptr))
barlen += (*ptr - 'a'+1);
/* The scale factor depends on bar length */
if (!bc->scalef) {
if (!bc->width) bc->width = barlen; /* default */
scalef = bc->scalef = (double)bc->width / (double)barlen;
}
/* The width defaults to "just enough" */
if (!bc->width) bc->width = barlen * scalef +1;
/* But it can be too small, in this case enlarge and center the area */
if (bc->width < barlen * scalef) {
int wid = barlen * scalef + 1;
bc->xoff -= (wid - bc->width)/2 ;
bc->width = wid;
/* Can't extend too far on the left */
if (bc->xoff < 0) {
bc->width += -bc->xoff;
bc->xoff = 0;
}
}
/* The height defaults to 80 points (rescaled) */
if (!bc->height) bc->height = 80 * scalef;
#if 0
/* If too small (5 + text), enlarge and center */
i = 5 + 10 * ((bc->flags & BARCODE_NO_ASCII)==0);
if (bc->height < i * scalef ) {
int hei = i * scalef;
bc->yoff -= (hei-bc->height)/2;
bc->height = hei;
if (bc->yoff < 0) {
bc->height += -bc->yoff;
bc->yoff = 0;
}
}
#else
/* If too small (5 + text), reduce the scale factor and center */
i = 5 + 10 * ((bc->flags & BARCODE_NO_ASCII)==0);
if (bc->height < i * scalef ) {
double scaleg = ((double)bc->height) / i;
int wid = bc->width * scaleg / scalef;
bc->xoff += (bc->width - wid)/2;
bc->width = wid;
scalef = scaleg;
}
#endif
/*
* deal with PCL output
*/
xpos = bc->margin + (bc->partial[0]-'0') * scalef;
for (ptr = bc->partial+1, i=1; *ptr; ptr++, i++) {
/* special cases: '+' and '-' */
if (*ptr == '+' || *ptr == '-') {
mode = *ptr; /* don't count it */ i++; continue;
}
/* j is the width of this bar/space */
if (isdigit (*ptr)) j = *ptr-'0';
else j = *ptr-'a'+1;
if (i%2) { /* bar */
x0 = bc->xoff + xpos;
y0 = bc->yoff + bc->margin;
yr = bc->height;
if (!(bc->flags & BARCODE_NO_ASCII)) { /* leave space for text */
if (mode == '-') {
/* text below bars: 10 points or five points */
yr -= (isdigit(*ptr) ? 10 : 5) * scalef;
} else { /* '+' */
/* text above bars: 10 or 0 from bottom, and 10 from top */
y0 += (isdigit(*ptr) ? 10 : 0) * scalef;
yr -= (isdigit(*ptr) ? 20 : 10) * scalef;
}
}
fprintf(f,"%c&a%.0fH", 27, x0 * 10.0);
fprintf(f,"%c&a%.0fV", 27, y0 * 10.0);
fprintf(f,"%c*c%.0fH", 27, ((j*scalef)-SHRINK_AMOUNT) * 10.0);
fprintf(f,"%c*c%.0fV", 27, yr * 10.0);
fprintf(f,"%c*c0P\n", 27);
}
xpos += j * scalef;
}
/* the text */
mode = '-'; /* reinstantiate default */
if (!(bc->flags & BARCODE_NO_ASCII)) {
k=0; /* k is the "previous font size" */
for (ptr = bc->textinfo; ptr; ptr = strchr(ptr, ' ')) {
while (*ptr == ' ') ptr++;
if (!*ptr) break;
if (*ptr == '+' || *ptr == '-') {
mode = *ptr; continue;
}
if (sscanf(ptr, "%lf:%lf:%c", &f1, &f2, &c) != 3) {
fprintf(stderr, "barcode: impossible data: %s\n", ptr);
continue;
}
/* select a Scalable Font */
if (fsav != f2)
{
if ((bc->flags & BARCODE_OUT_PCL_III) == BARCODE_OUT_PCL_III)
{ strcpy(font_id, "4148"); /* font Univers */
}
else
{ strcpy(font_id, "16602"); /* font Arial */
}
fprintf(f,"%c(8U%c(s1p%5.2fv0s0b%sT", 27, 27, f2 * scalef, font_id);
}
fsav = f2;
fprintf(f,"%c&a%.0fH", 27, (bc->xoff + f1 * scalef + bc->margin) * 10.0);
fprintf(f,"%c&a%.0fV", 27,
mode != '-'
? ((double)bc->yoff + bc->margin + 8*scalef) * 10.0
: ((double)bc->yoff + bc->margin + bc->height ) * 10.0);
fprintf(f, "%c", c);
}
}
return 0;
}
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