--- /dev/null
+/*
+ * 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;
+}
projects / glabels / blobdiff