zint/backend/svg.c

/* svg.c - Scalable Vector Graphics */

/*
    libzint - the open source barcode library
    Copyright (C) 2009 Robin Stuart <robin@zint.org.uk>

    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 3 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.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "common.h"

#define SSET	"0123456789ABCDEF"

int svg_plot(struct zint_symbol *symbol)
{
	int i, block_width, latch, r, this_row;
	float textpos, large_bar_height, preset_height, row_height, row_posn;
	FILE *fsvg;
	int fgred, fggrn, fgblu, bgred, bggrn, bgblu;
	float red_ink, green_ink, blue_ink, red_paper, green_paper, blue_paper;
	int error_number = 0;
	int textoffset, xoffset, yoffset, textdone, main_width;
	char textpart[10], addon[6];
	int large_bar_count, comp_offset;
	float addon_text_posn;
	float scaler = symbol->scale;
	
	row_height=0;
	textdone = 0;
	main_width = symbol->width;
	strcpy(addon, "");
	comp_offset = 0;
	addon_text_posn = 0.0;
	
	if((symbol->output_options & BARCODE_STDOUT) != 0) {
		fsvg = stdout;
	} else {
		fsvg = fopen(symbol->outfile, "w");
	}
	if(fsvg == NULL) {
		strcpy(symbol->errtxt, "Could not open output file");
		return ERROR_FILE_ACCESS;
	}
	
	/* sort out colour options */
	to_upper((unsigned char*)symbol->fgcolour);
	to_upper((unsigned char*)symbol->bgcolour);
	
	if(strlen(symbol->fgcolour) != 6) {
		strcpy(symbol->errtxt, "Malformed foreground colour target");
		return ERROR_INVALID_OPTION;
	}
	if(strlen(symbol->bgcolour) != 6) {
		strcpy(symbol->errtxt, "Malformed background colour target");
		return ERROR_INVALID_OPTION;
	}
	error_number = is_sane(SSET, (unsigned char*)symbol->fgcolour);
	if (error_number == ERROR_INVALID_DATA) {
		strcpy(symbol->errtxt, "Malformed foreground colour target");
		return ERROR_INVALID_OPTION;
	}
	error_number = is_sane(SSET, (unsigned char*)symbol->bgcolour);
	if (error_number == ERROR_INVALID_DATA) {
		strcpy(symbol->errtxt, "Malformed background colour target");
		return ERROR_INVALID_OPTION;
	}
	
	fgred = (16 * ctoi(symbol->fgcolour[0])) + ctoi(symbol->fgcolour[1]);
	fggrn = (16 * ctoi(symbol->fgcolour[2])) + ctoi(symbol->fgcolour[3]);
	fgblu = (16 * ctoi(symbol->fgcolour[4])) + ctoi(symbol->fgcolour[5]);
	bgred = (16 * ctoi(symbol->bgcolour[0])) + ctoi(symbol->bgcolour[1]);
	bggrn = (16 * ctoi(symbol->bgcolour[2])) + ctoi(symbol->bgcolour[3]);
	bgblu = (16 * ctoi(symbol->bgcolour[4])) + ctoi(symbol->bgcolour[5]);
	red_ink = fgred / 256.0;
	green_ink = fggrn / 256.0;
	blue_ink = fgblu / 256.0;
	red_paper = bgred / 256.0;
	green_paper = bggrn / 256.0;
	blue_paper = bgblu / 256.0;
	
	if (symbol->height == 0) {
		symbol->height = 50;
	}
	
	large_bar_count = 0;
	preset_height = 0.0;
	for(i = 0; i < symbol->rows; i++) {
		preset_height += symbol->row_height[i];
		if(symbol->row_height[i] == 0) {
			large_bar_count++;
		}
	}
	large_bar_height = (symbol->height - preset_height) / large_bar_count;

	if (large_bar_count == 0) {
		symbol->height = preset_height;
	}
	
	while(symbol->encoded_data[symbol->rows - 1][comp_offset] != '1') {
		comp_offset++;
	}

	/* Certain symbols need whitespace otherwise characters get chopped off the sides */
	if (((symbol->symbology == BARCODE_EANX) && (symbol->rows == 1)) || (symbol->symbology == BARCODE_EANX_CC)) {
		switch(strlen(symbol->text)) {
			case 13: /* EAN 13 */
			case 16:
			case 19:
				if(symbol->whitespace_width == 0) {
					symbol->whitespace_width = 10;
				}
				main_width = 96 + comp_offset;
				break;
			default:
				main_width = 68 + comp_offset;
		}
	}
	
	if (((symbol->symbology == BARCODE_UPCA) && (symbol->rows == 1)) || (symbol->symbology == BARCODE_UPCA_CC)) {
		if(symbol->whitespace_width == 0) {
			symbol->whitespace_width = 10;
			main_width = 96 + comp_offset;
		}
	}
	
	if (((symbol->symbology == BARCODE_UPCE) && (symbol->rows == 1)) || (symbol->symbology == BARCODE_UPCE_CC)) {
		if(symbol->whitespace_width == 0) {
			symbol->whitespace_width = 10;
			main_width = 51 + comp_offset;
		}
	}
	
	latch = 0;
	r = 0;
	/* Isolate add-on text */
	for(i = 0; i < strlen(symbol->text); i++) {
		if (latch == 1) {
			addon[r] = symbol->text[i];
			r++;
		}
		if (symbol->text[i] == '+') {
			latch = 1;
		}
	}
	addon[r] = '\0';
	
	if(strcmp(symbol->text, "")) {
		textoffset = 9;
	} else {
		textoffset = 0;
	}
	xoffset = symbol->border_width + symbol->whitespace_width;
	yoffset = symbol->border_width;
	
	/* Start writing the header */
	fprintf(fsvg, "<?xml version=\"1.0\" standalone=\"no\"?>\n");
	fprintf(fsvg, "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n");
	fprintf(fsvg, "   \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n");
	if(symbol->symbology != BARCODE_MAXICODE) {
		fprintf(fsvg, "<svg width=\"%d\" height=\"%d\" version=\"1.1\"\n", roundup((symbol->width + xoffset + xoffset) * scaler), roundup((symbol->height + textoffset + yoffset + yoffset) * scaler));
	} else {
		fprintf(fsvg, "<svg width=\"%d\" height=\"%d\" version=\"1.1\"\n", roundup((74.0 + xoffset + xoffset) * scaler), roundup((72.0 + yoffset + yoffset) * scaler));
	}
	fprintf(fsvg, "   xmlns=\"http://www.w3.org/2000/svg\">\n");
	if(strlen(symbol->text) != 0) {
		fprintf(fsvg, "   <desc>%s\n", symbol->text);
	} else {
		fprintf(fsvg, "   <desc>Zint Generated Symbol\n");
	}
	fprintf(fsvg, "   </desc>\n");
	fprintf(fsvg, "\n   <g id=\"barcode\" fill=\"#%s\">\n", symbol->fgcolour);

	if(symbol->symbology != BARCODE_MAXICODE) {
		fprintf(fsvg, "      <rect x=\"0\" y=\"0\" width=\"%d\" height=\"%d\" fill=\"#%s\" />\n", roundup((symbol->width + xoffset + xoffset) * scaler), roundup((symbol->height + textoffset + yoffset + yoffset) * scaler), symbol->bgcolour);
	} else {
		fprintf(fsvg, "      <rect x=\"0\" y=\"0\" width=\"%d\" height=\"%d\" fill=\"#%s\" />\n", roundup((74.0 + xoffset + xoffset) * scaler), roundup((72.0 + yoffset + yoffset) * scaler), symbol->bgcolour);
	}

	if(symbol->symbology == BARCODE_MAXICODE) {
		/* Maxicode uses hexagons */
		float ax, ay, bx, by, cx, cy, dx, dy, ex, ey, fx, fy, mx, my;
		
				
		textoffset = 0.0;
		if (((symbol->output_options & BARCODE_BOX) != 0) || ((symbol->output_options & BARCODE_BIND) != 0)) {
			fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", 0.0, 0.0, (74.0 + xoffset + xoffset) * scaler, symbol->border_width * scaler);
			fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", 0.0, (72.0 + symbol->border_width) * scaler, (74.0 + xoffset + xoffset) * scaler, symbol->border_width * scaler);
		}
		if((symbol->output_options & BARCODE_BOX) != 0) {
			/* side bars */
			fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", 0.0, 0.0, symbol->border_width * scaler, (72.0 + (2 * symbol->border_width)) * scaler);
			fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (74.0 + xoffset + xoffset - symbol->border_width) * scaler, 0.0, symbol->border_width * scaler, (72.0 + (2 * symbol->border_width)) * scaler);
		}
		fprintf(fsvg, "      <circle cx=\"%.2f\" cy=\"%.2f\" r=\"%.2f\" fill=\"#%s\" />\n", (35.76 + xoffset) * scaler, (35.60 + yoffset) * scaler, 10.85 * scaler, symbol->fgcolour);
		fprintf(fsvg, "      <circle cx=\"%.2f\" cy=\"%.2f\" r=\"%.2f\" fill=\"#%s\" />\n", (35.76 + xoffset) * scaler, (35.60 + yoffset) * scaler, 8.97 * scaler, symbol->bgcolour);
		fprintf(fsvg, "      <circle cx=\"%.2f\" cy=\"%.2f\" r=\"%.2f\" fill=\"#%s\" />\n", (35.76 + xoffset) * scaler, (35.60 + yoffset) * scaler, 7.10 * scaler, symbol->fgcolour);
		fprintf(fsvg, "      <circle cx=\"%.2f\" cy=\"%.2f\" r=\"%.2f\" fill=\"#%s\" />\n", (35.76 + xoffset) * scaler, (35.60 + yoffset) * scaler, 5.22 * scaler, symbol->bgcolour);
		fprintf(fsvg, "      <circle cx=\"%.2f\" cy=\"%.2f\" r=\"%.2f\" fill=\"#%s\" />\n", (35.76 + xoffset) * scaler, (35.60 + yoffset) * scaler, 3.31 * scaler, symbol->fgcolour);
		fprintf(fsvg, "      <circle cx=\"%.2f\" cy=\"%.2f\" r=\"%.2f\" fill=\"#%s\" />\n", (35.76 + xoffset) * scaler, (35.60 + yoffset) * scaler, 1.43 * scaler, symbol->bgcolour);
		for(r = 0; r < symbol->rows; r++) {
			for(i = 0; i < symbol->width; i++) {
				if(symbol->encoded_data[r][i] == '1') {
					/* Dump a hexagon */
					my = r * 2.135 + 1.43;
					ay = my + 1.0 + yoffset;
					by = my + 0.5 + yoffset;
					cy = my - 0.5 + yoffset;
					dy = my - 1.0 + yoffset;
					ey = my - 0.5 + yoffset;
					fy = my + 0.5 + yoffset;
					if(r % 2 == 1) {
						mx = (2.46 * i) + 1.23 + 1.23;
					} else {
						mx = (2.46 * i) + 1.23;
					}
					ax = mx + xoffset;
					bx = mx + 0.86 + xoffset;
					cx = mx + 0.86 + xoffset;
					dx = mx + xoffset;
					ex = mx - 0.86 + xoffset;
					fx = mx - 0.86 + xoffset;
					fprintf(fsvg, "      <path d=\"M %.2f %.2f L %.2f %.2f L %.2f %.2f L %.2f %.2f L %.2f %.2f L %.2f %.2f Z\" />\n", ax * scaler, ay * scaler, bx * scaler, by * scaler, cx * scaler, cy * scaler, dx * scaler, dy * scaler, ex * scaler, ey * scaler, fx * scaler, fy * scaler);
				}
			}
		}
	}	
	
	if(symbol->symbology != BARCODE_MAXICODE) {
		/* everything else uses rectangles (or squares) */
		/* Works from the bottom of the symbol up */
		int addon_latch = 0;
		
		for(r = 0; r < symbol->rows; r++) {
			this_row = r;
			if(symbol->row_height[this_row] == 0) {
				row_height = large_bar_height;
			} else {
				row_height = symbol->row_height[this_row];
			}
			row_posn = 0;
			for(i = 0; i < r; i++) {
				if(symbol->row_height[i] == 0) {
					row_posn += large_bar_height;
				} else {
					row_posn += symbol->row_height[i];
				}
			}
			row_posn += yoffset;
			
			i = 0;
			if(symbol->encoded_data[this_row][0] == '1') {
				latch = 1;
			} else {
				latch = 0;
			}
			
			do {
				block_width = 0;
				do {
					block_width++;
				} while (symbol->encoded_data[this_row][i + block_width] == symbol->encoded_data[this_row][i]);
				if((addon_latch == 0) && (r == 0) && (i > main_width)) {
					addon_text_posn = 9.0;
					addon_latch = 1;
				} 
				if(latch == 1) { 
					/* a bar */
					if(addon_latch == 0) {
						fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (i + xoffset) * scaler, row_posn * scaler, block_width * scaler, row_height * scaler);
					} else {
						fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (i + xoffset) * scaler, (row_posn + 10.0) * scaler, block_width * scaler, (row_height - 5.0) * scaler);
					}
					latch = 0;
				} else {
					/* a space */
					latch = 1;
				}
				i += block_width;
				
			} while (i < symbol->width);
		}
	}
	/* That's done the actual data area, everything else is human-friendly */

	xoffset += comp_offset;
	row_posn = (yoffset + large_bar_height) * scaler;

	if (((symbol->symbology == BARCODE_EANX) && (symbol->rows == 1)) || (symbol->symbology == BARCODE_EANX_CC)) {
		/* guard bar extensions and text formatting for EAN8 and EAN13 */
		switch(strlen(symbol->text)) {
			case 8: /* EAN-8 */
			case 11:
			case 14:
				fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (0 + xoffset) * scaler, row_posn, scaler, 5.0 * scaler);
				fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (2 + xoffset) * scaler, row_posn, scaler, 5.0 * scaler);
				fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (32 + xoffset) * scaler, row_posn, scaler, 5.0 * scaler);
				fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (34 + xoffset) * scaler, row_posn, scaler, 5.0 * scaler);
				fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (64 + xoffset) * scaler, row_posn, scaler, 5.0 * scaler);
				fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (66 + xoffset) * scaler, row_posn, scaler, 5.0 * scaler); 
				for(i = 0; i < 4; i++) {
					textpart[i] = symbol->text[i];
				}
				textpart[4] = '\0';
				textpos = 17;
				fprintf(fsvg, "      <text x=\"%.2f\" y=\"%.2f\" text-anchor=\"middle\"\n", (textpos + xoffset) * scaler, (symbol->height + textoffset) * scaler);
				fprintf(fsvg, "         font-family=\"Helvetica\" font-size=\"%.1f\" fill=\"#%s\" >\n", 11.0 * scaler, symbol->fgcolour);
				fprintf(fsvg, "         %s\n", textpart);
				fprintf(fsvg, "      </text>\n");
				for(i = 0; i < 4; i++) {
					textpart[i] = symbol->text[i + 4];
				}
				textpart[4] = '\0';
				textpos = 50;
				fprintf(fsvg, "      <text x=\"%.2f\" y=\"%.2f\" text-anchor=\"middle\"\n", (textpos + xoffset) * scaler, (symbol->height + textoffset) * scaler);
				fprintf(fsvg, "         font-family=\"Helvetica\" font-size=\"%.1f\" fill=\"#%s\" >\n", 11.0 * scaler, symbol->fgcolour);
				fprintf(fsvg, "         %s\n", textpart);
				fprintf(fsvg, "      </text>\n");
				textdone = 1;
				switch(strlen(addon)) {
					case 2:	
						textpos = symbol->width + xoffset - 10;
						fprintf(fsvg, "      <text x=\"%.2f\" y=\"%.2f\" text-anchor=\"middle\"\n", textpos * scaler, addon_text_posn * scaler);
						fprintf(fsvg, "         font-family=\"Helvetica\" font-size=\"%.1f\" fill=\"#%s\" >\n", 11.0 * scaler, symbol->fgcolour);
						fprintf(fsvg, "         %s\n", addon);
						fprintf(fsvg, "      </text>\n");
						break;
					case 5:
						textpos = symbol->width + xoffset - 23;
						fprintf(fsvg, "      <text x=\"%.2f\" y=\"%.2f\" text-anchor=\"middle\"\n", textpos * scaler, addon_text_posn * scaler);
						fprintf(fsvg, "         font-family=\"Helvetica\" font-size=\"%.1f\" fill=\"#%s\" >\n", 11.0 * scaler, symbol->fgcolour);
						fprintf(fsvg, "         %s\n", addon);
						fprintf(fsvg, "      </text>\n");
						break;
				}

				break;
			case 13: /* EAN 13 */
			case 16:
			case 19:
				fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (0 + xoffset) * scaler, row_posn, scaler, 5.0 * scaler);
				fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (2 + xoffset) * scaler, row_posn, scaler, 5.0 * scaler);
				fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (46 + xoffset) * scaler, row_posn, scaler, 5.0 * scaler);
				fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (48 + xoffset) * scaler, row_posn, scaler, 5.0 * scaler);
				fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (92 + xoffset) * scaler, row_posn, scaler, 5.0 * scaler);
				fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (94 + xoffset) * scaler, row_posn, scaler, 5.0 * scaler); 
				textpart[0] = symbol->text[0];
				textpart[1] = '\0';
				textpos = -7;
				fprintf(fsvg, "      <text x=\"%.2f\" y=\"%.2f\" text-anchor=\"middle\"\n", (textpos + xoffset) * scaler, (symbol->height + textoffset) * scaler);
				fprintf(fsvg, "         font-family=\"Helvetica\" font-size=\"%.1f\" fill=\"#%s\" >\n", 11.0 * scaler, symbol->fgcolour);
				fprintf(fsvg, "         %s\n", textpart);
				fprintf(fsvg, "      </text>\n");
				for(i = 0; i < 6; i++) {
					textpart[i] = symbol->text[i + 1];
				}
				textpart[6] = '\0';
				textpos = 24;
				fprintf(fsvg, "      <text x=\"%.2f\" y=\"%.2f\" text-anchor=\"middle\"\n", (textpos + xoffset) * scaler, (symbol->height + textoffset) * scaler);
				fprintf(fsvg, "         font-family=\"Helvetica\" font-size=\"%.1f\" fill=\"#%s\" >\n", 11.0 * scaler, symbol->fgcolour);
				fprintf(fsvg, "         %s\n", textpart);
				fprintf(fsvg, "      </text>\n");
				for(i = 0; i < 6; i++) {
					textpart[i] = symbol->text[i + 7];
				}
				textpart[6] = '\0';
				textpos = 71;
				fprintf(fsvg, "      <text x=\"%.2f\" y=\"%.2f\" text-anchor=\"middle\"\n", (textpos + xoffset) * scaler, (symbol->height + textoffset) * scaler);
				fprintf(fsvg, "         font-family=\"Helvetica\" font-size=\"%.1f\" fill=\"#%s\" >\n", 11.0 * scaler, symbol->fgcolour);
				fprintf(fsvg, "         %s\n", textpart);
				fprintf(fsvg, "      </text>\n");
				textdone = 1;
				switch(strlen(addon)) {
					case 2:	
						textpos = symbol->width + xoffset - 10;
						fprintf(fsvg, "      <text x=\"%.2f\" y=\"%.2f\" text-anchor=\"middle\"\n", textpos * scaler, addon_text_posn * scaler);
						fprintf(fsvg, "         font-family=\"Helvetica\" font-size=\"%.1f\" fill=\"#%s\" >\n", 11.0 * scaler, symbol->fgcolour);
						fprintf(fsvg, "         %s\n", addon);
						fprintf(fsvg, "      </text>\n");
						break;
					case 5:
						textpos = symbol->width + xoffset - 23;
						fprintf(fsvg, "      <text x=\"%.2f\" y=\"%.2f\" text-anchor=\"middle\"\n", textpos * scaler, addon_text_posn * scaler);
						fprintf(fsvg, "         font-family=\"Helvetica\" font-size=\"%.1f\" fill=\"#%s\" >\n", 11.0 * scaler, symbol->fgcolour);
						fprintf(fsvg, "         %s\n", addon);
						fprintf(fsvg, "      </text>\n");
						break;
				}
				break;

		}
	}	

	if (((symbol->symbology == BARCODE_UPCA) && (symbol->rows == 1)) || (symbol->symbology == BARCODE_UPCA_CC)) {
		/* guard bar extensions and text formatting for UPCA */
		latch = 1;
		
		i = 0 + comp_offset;
		do {
			block_width = 0;
			do {
				block_width++;
			} while (symbol->encoded_data[symbol->rows - 1][i + block_width] == symbol->encoded_data[symbol->rows - 1][i]);
			if(latch == 1) {
				/* a bar */
				fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (i + xoffset - comp_offset) * scaler, row_posn, block_width * scaler, 5.0 * scaler);
				latch = 0;
			} else {
				/* a space */
				latch = 1;
			}
			i += block_width;
		} while (i < 11 + comp_offset);
		fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (46 + xoffset) * scaler, row_posn, scaler, 5.0 * scaler);
		fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (48 + xoffset) * scaler, row_posn, scaler, 5.0 * scaler);
		latch = 1;
		i = 85 + comp_offset;
		do {
			block_width = 0;
			do {
				block_width++;
			} while (symbol->encoded_data[symbol->rows - 1][i + block_width] == symbol->encoded_data[symbol->rows - 1][i]);
			if(latch == 1) {
				/* a bar */
				fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (i + xoffset - comp_offset) * scaler, row_posn, block_width * scaler, 5.0 * scaler);
				latch = 0;
			} else {
				/* a space */
				latch = 1;
			}
			i += block_width;
		} while (i < 96 + comp_offset);
		textpart[0] = symbol->text[0];
		textpart[1] = '\0';
		textpos = -5;
				fprintf(fsvg, "      <text x=\"%.2f\" y=\"%.2f\" text-anchor=\"middle\"\n", (textpos + xoffset) * scaler, (symbol->height + textoffset) * scaler);
				fprintf(fsvg, "         font-family=\"Helvetica\" font-size=\"%.1f\" fill=\"#%s\" >\n", 8.0 * scaler, symbol->fgcolour);
				fprintf(fsvg, "         %s\n", textpart);
				fprintf(fsvg, "      </text>\n");
		for(i = 0; i < 5; i++) {
			textpart[i] = symbol->text[i + 1];
		}
		textpart[5] = '\0';
		textpos = 27;
		fprintf(fsvg, "      <text x=\"%.2f\" y=\"%.2f\" text-anchor=\"middle\"\n", (textpos + xoffset) * scaler, (symbol->height + textoffset) * scaler);
		fprintf(fsvg, "         font-family=\"Helvetica\" font-size=\"%.1f\" fill=\"#%s\" >\n", 11.0 * scaler, symbol->fgcolour);
		fprintf(fsvg, "         %s\n", textpart);
		fprintf(fsvg, "      </text>\n");
		for(i = 0; i < 5; i++) {
			textpart[i] = symbol->text[i + 6];
		}
		textpart[6] = '\0';
		textpos = 68;
		fprintf(fsvg, "      <text x=\"%.2f\" y=\"%.2f\" text-anchor=\"middle\"\n", (textpos + xoffset) * scaler, (symbol->height + textoffset) * scaler);
		fprintf(fsvg, "         font-family=\"Helvetica\" font-size=\"%.1f\" fill=\"#%s\" >\n", 11.0 * scaler, symbol->fgcolour);
		fprintf(fsvg, "         %s\n", textpart);
		fprintf(fsvg, "      </text>\n");
		textpart[0] = symbol->text[11];
		textpart[1] = '\0';
		textpos = 100;
		fprintf(fsvg, "      <text x=\"%.2f\" y=\"%.2f\" text-anchor=\"middle\"\n", (textpos + xoffset) * scaler, (symbol->height + textoffset) * scaler);
		fprintf(fsvg, "         font-family=\"Helvetica\" font-size=\"%.1f\" fill=\"#%s\" >\n", 8.0 * scaler, symbol->fgcolour);
		fprintf(fsvg, "         %s\n", textpart);
		fprintf(fsvg, "      </text>\n");
		textdone = 1;
		switch(strlen(addon)) {
			case 2:	
				textpos = symbol->width + xoffset - 10;
				fprintf(fsvg, "      <text x=\"%.2f\" y=\"%.2f\" text-anchor=\"middle\"\n", textpos * scaler, addon_text_posn * scaler);
				fprintf(fsvg, "         font-family=\"Helvetica\" font-size=\"%.1f\" fill=\"#%s\" >\n", 11.0 * scaler, symbol->fgcolour);
				fprintf(fsvg, "         %s\n", addon);
				fprintf(fsvg, "      </text>\n");
				break;
			case 5:
				textpos = symbol->width + xoffset - 23;
				fprintf(fsvg, "      <text x=\"%.2f\" y=\"%.2f\" text-anchor=\"middle\"\n", textpos * scaler, addon_text_posn * scaler);
				fprintf(fsvg, "         font-family=\"Helvetica\" font-size=\"%.1f\" fill=\"#%s\" >\n", 11.0 * scaler, symbol->fgcolour);
				fprintf(fsvg, "         %s\n", addon);
				fprintf(fsvg, "      </text>\n");
				break;
		}

	}	

	if (((symbol->symbology == BARCODE_UPCE) && (symbol->rows == 1)) || (symbol->symbology == BARCODE_UPCE_CC)) {
		/* guard bar extensions and text formatting for UPCE */
		fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (0 + xoffset) * scaler, row_posn, scaler, 5.0 * scaler);
		fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (2 + xoffset) * scaler, row_posn, scaler, 5.0 * scaler);
		fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (46 + xoffset) * scaler, row_posn, scaler, 5.0 * scaler);
		fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (48 + xoffset) * scaler, row_posn, scaler, 5.0 * scaler);
		fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (50 + xoffset) * scaler, row_posn, scaler, 5.0 * scaler);
		textpart[0] = symbol->text[0];
		textpart[1] = '\0';
		textpos = -5;
		fprintf(fsvg, "      <text x=\"%.2f\" y=\"%.2f\" text-anchor=\"middle\"\n", (textpos + xoffset) * scaler, (symbol->height + textoffset) * scaler);
		fprintf(fsvg, "         font-family=\"Helvetica\" font-size=\"%.1f\" fill=\"#%s\" >\n", 8.0 * scaler, symbol->fgcolour);
		fprintf(fsvg, "         %s\n", textpart);
		fprintf(fsvg, "      </text>\n");
		for(i = 0; i < 6; i++) {
			textpart[i] = symbol->text[i + 1];
		}
		textpart[6] = '\0';
		textpos = 24;
		fprintf(fsvg, "      <text x=\"%.2f\" y=\"%.2f\" text-anchor=\"middle\"\n", (textpos + xoffset) * scaler, (symbol->height + textoffset) * scaler);
		fprintf(fsvg, "         font-family=\"Helvetica\" font-size=\"%.1f\" fill=\"#%s\" >\n", 11.0 * scaler, symbol->fgcolour);
		fprintf(fsvg, "         %s\n", textpart);
		fprintf(fsvg, "      </text>\n");
		textpart[0] = symbol->text[7];
		textpart[1] = '\0';
		textpos = 55;
		fprintf(fsvg, "      <text x=\"%.2f\" y=\"%.2f\" text-anchor=\"middle\"\n", (textpos + xoffset) * scaler, (symbol->height + textoffset) * scaler);
		fprintf(fsvg, "         font-family=\"Helvetica\" font-size=\"%.1f\" fill=\"#%s\" >\n", 8.0 * scaler, symbol->fgcolour);
		fprintf(fsvg, "         %s\n", textpart);
		fprintf(fsvg, "      </text>\n");
		textdone = 1;
		switch(strlen(addon)) {
			case 2:	
				textpos = symbol->width + xoffset - 10;
				fprintf(fsvg, "      <text x=\"%.2f\" y=\"%.2f\" text-anchor=\"middle\"\n", textpos * scaler, addon_text_posn * scaler);
				fprintf(fsvg, "         font-family=\"Helvetica\" font-size=\"%.1f\" fill=\"#%s\" >\n", 11.0 * scaler, symbol->fgcolour);
				fprintf(fsvg, "         %s\n", addon);
				fprintf(fsvg, "      </text>\n");
				break;
			case 5:
				textpos = symbol->width + xoffset - 23;
				fprintf(fsvg, "      <text x=\"%.2f\" y=\"%.2f\" text-anchor=\"middle\"\n", textpos * scaler, addon_text_posn * scaler);
				fprintf(fsvg, "         font-family=\"Helvetica\" font-size=\"%.1f\" fill=\"#%s\" >\n", 11.0 * scaler, symbol->fgcolour);
				fprintf(fsvg, "         %s\n", addon);
				fprintf(fsvg, "      </text>\n");
				break;
		}

	}

	xoffset -= comp_offset;

	switch(symbol->symbology) {
		case BARCODE_CODABLOCKF:
		case BARCODE_HIBC_BLOCKF:
			fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", xoffset * scaler, 0.0, symbol->width * scaler, symbol->border_width * scaler);
			fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", xoffset * scaler, (symbol->height + symbol->border_width) * scaler, symbol->width * scaler, symbol->border_width * scaler);
			if(symbol->rows > 1) {
				/* row binding */
				for(r = 1; r < symbol->rows; r++) {
					fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (xoffset + 11) * scaler, ((r * row_height) + yoffset - 1) * scaler, (symbol->width - 24) * scaler, 2.0 * scaler);
				}
			}
			break;
		case BARCODE_MAXICODE:
			/* Do nothing! (It's already been done) */
			break;
		default:
			if((symbol->output_options & BARCODE_BIND) != 0) {
				if((symbol->rows > 1) && (is_stackable(symbol->symbology) == 1)) {
					/* row binding */
					for(r = 1; r < symbol->rows; r++) {
						fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", xoffset * scaler, ((r * row_height) + yoffset - 1) * scaler, symbol->width * scaler, 2.0 * scaler);
					}
				}
			}
			if (((symbol->output_options & BARCODE_BOX) != 0) || ((symbol->output_options & BARCODE_BIND) != 0)) {
				fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", 0.0, 0.0, (symbol->width + xoffset + xoffset) * scaler, symbol->border_width * scaler);
				fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", 0.0, (symbol->height + symbol->border_width) * scaler, (symbol->width + xoffset + xoffset) * scaler, symbol->border_width * scaler);
			}
			if((symbol->output_options & BARCODE_BOX) != 0) {
				/* side bars */
				fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", 0.0, 0.0, symbol->border_width * scaler, (symbol->height + (2 * symbol->border_width)) * scaler);
				fprintf(fsvg, "      <rect x=\"%.2f\" y=\"%.2f\" width=\"%.2f\" height=\"%.2f\" />\n", (symbol->width + xoffset + xoffset - symbol->border_width) * scaler, 0.0, symbol->border_width * scaler, (symbol->height + (2 * symbol->border_width)) * scaler);
			}
			break;
	}
	
	/* Put the human readable text at the bottom */
	if((textdone == 0) && (strlen(symbol->text) != 0)) {
		textpos = symbol->width / 2.0;
		fprintf(fsvg, "      <text x=\"%.2f\" y=\"%.2f\" text-anchor=\"middle\"\n", (textpos + xoffset) * scaler, (symbol->height + textoffset) * scaler);
		fprintf(fsvg, "         font-family=\"Helvetica\" font-size=\"%.1f\" fill=\"#%s\" >\n", 8.0 * scaler, symbol->fgcolour);
		fprintf(fsvg, "         %s\n", symbol->text);
		fprintf(fsvg, "      </text>\n");
	}
	fprintf(fsvg, "   </g>\n");
	fprintf(fsvg, "</svg>\n");
	
	fclose(fsvg);
	
	return error_number;
}