--- /dev/null
+/*
+ * bc-zint.c
+ * Copyright (C) 2001-2009 Jim Evins <evins@snaught.com>.
+ *
+ * This file is part of gLabels.
+ *
+ * gLabels 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.
+ *
+ * gLabels 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 gLabels. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+
+#ifdef HAVE_LIBZINT
+
+#include "bc-zint.h"
+
+#include <glib.h>
+#include <ctype.h>
+#include <string.h>
+#include <zint.h> /* Zint */
+
+#include "debug.h"
+
+
+/*========================================================*/
+/* Private macros and constants. */
+/*========================================================*/
+#define SHRINK_AMOUNT 0.15 /* shrink bars to account for ink spreading */
+#define FONT_SCALE 0.95 /* Shrink fonts just a hair */
+
+
+/*===========================================*/
+/* Local function prototypes */
+/*===========================================*/
+static glBarcode *render_zint (struct zint_symbol *symbol, gboolean text_flag);
+gint module_is_set(struct zint_symbol *symbol, gint y_coord, gint x_coord);
+
+
+
+/*****************************************************************************/
+/* Generate intermediate representation of barcode. */
+/*****************************************************************************/
+glBarcode *
+gl_barcode_zint_new (const gchar *id,
+ gboolean text_flag,
+ gboolean checksum_flag,
+ gdouble w,
+ gdouble h,
+ const gchar *digits)
+{
+ glBarcode *gbc;
+ struct zint_symbol *symbol;
+ gint type;
+ gint result;
+
+ symbol = ZBarcode_Create();
+
+ /* Assign type flag. Pre-filter by length for subtypes. */
+ if (g_ascii_strcasecmp (id, "GS1-128") == 0) {
+ symbol->symbology = BARCODE_EAN128;
+ } else {
+ g_message( "Illegal barcode id %s", id );
+ ZBarcode_Delete (symbol);
+ return NULL;
+ }
+
+ /* Checksum not supported yet!!
+ if (!checksum_flag) {
+ flags |= BARCODE_NO_CHECKSUM;
+ }
+ */
+
+ // g_message ("Zint Requested Dimensions: %f x %f", w, h);
+
+ result = ZBarcode_Encode(symbol, (unsigned char *)digits, 0);
+ if (result) {
+ ZBarcode_Delete (symbol);
+ g_message ("Zint Error: %s", symbol->errtxt);
+ return NULL;
+ }
+
+ /* Scale calculated after height, always maintain aspect ratio */
+ // symbol->height = (h > 0.0 ? (gint)h : 50);
+ symbol->scale = (w / symbol->width);
+ symbol->height = h / symbol->scale; // height always in standard size
+
+
+ /* Convert Sums provided by zint encode */
+ gbc = render_zint(symbol, text_flag);
+
+ // g_message ("Zint Barcode Dimensions: %f x %f", gbc->width, gbc->height);
+
+ ZBarcode_Delete(symbol);
+
+ return gbc;
+}
+
+
+/*--------------------------------------------------------------------------
+ * PRIVATE. Render to glBarcode the provided Zint symbol.
+ *
+ * Based on the SVG output from Zint library, handles lots of otherwise
+ * internal Zint code to convert directly to glBarcode representation.
+ *
+ *--------------------------------------------------------------------------*/
+static glBarcode *render_zint(struct zint_symbol *symbol, gboolean text_flag) {
+
+ glBarcode *gbc;
+ glBarcodeLine *line;
+ glBarcodeChar *bchar;
+
+ gint i, r, block_width, latch, this_row;
+ gfloat textpos, large_bar_height, preset_height, row_height, row_posn = 0.0;
+ gint error_number = 0;
+ gint textoffset, textheight, xoffset, yoffset, textdone, main_width;
+ gchar textpart[10], addon[6];
+ gint large_bar_count, comp_offset;
+ gfloat addon_text_posn;
+ gfloat default_text_posn;
+ gfloat scaler = symbol->scale;
+ gchar *p;
+
+ gbc = g_new0(glBarcode, 1);
+
+ row_height = 0;
+ textdone = 0;
+ main_width = symbol->width;
+ strcpy(addon, "");
+ comp_offset = 0;
+ addon_text_posn = 0.0;
+
+ if (symbol->height < 15) {
+ symbol->height = 15;
+ }
+ // symbol->height = 50;
+
+ if(text_flag && strlen(symbol->text) != 0) {
+ textheight = 9.0;
+ textoffset = 2.0;
+ } else {
+ textheight = textoffset = 0.0;
+ }
+ // Update height for texts
+ symbol->height -= textheight + textoffset;
+
+ 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(!(module_is_set(symbol, symbol->rows - 1, comp_offset))) {
+ comp_offset++;
+ }
+
+ xoffset = symbol->border_width + symbol->whitespace_width;
+ yoffset = symbol->border_width;
+
+ gbc->width = (gdouble) (symbol->width + xoffset + xoffset) * scaler;
+ gbc->height = (gdouble) (symbol->height + textheight + textoffset + yoffset + yoffset) * scaler;
+
+ default_text_posn = (symbol->height + textoffset + symbol->border_width) * 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(module_is_set(symbol, this_row, 0)) {
+ latch = 1;
+ } else {
+ latch = 0;
+ }
+
+ do {
+ block_width = 0;
+ do {
+ block_width++;
+ } while (module_is_set(symbol, this_row, i + block_width) == module_is_set(symbol, this_row, i));
+ if((addon_latch == 0) && (r == (symbol->rows - 1)) && (i > main_width)) {
+ addon_text_posn = (row_posn + 8.0) * scaler;
+ addon_latch = 1;
+ }
+ if(latch == 1) {
+ /* a bar */
+ line = g_new0 (glBarcodeLine, 1);
+
+ line->width = block_width * scaler;
+ /* glBarcodeLine centers based on width, counter-act!!! */
+ line->x = ((i + xoffset) + (block_width / 2.0)) * scaler;
+
+ if(addon_latch == 0) {
+ line->y = row_posn * scaler;
+ line->length = row_height * scaler;
+ } else {
+ line->y = (row_posn + 10.0) * scaler;
+ line->length = (row_height - 5.0) * scaler;
+ }
+ latch = 0;
+ // g_message ("Zint Adding Line at: %f x %f dim: %f x %f", line->x, line->y, line->width, line->length);
+ gbc->lines = g_list_append (gbc->lines, line);
+ } else {
+ /* a space */
+ latch = 1;
+ }
+ i += block_width;
+
+ } while (i < symbol->width);
+ }
+ }
+ /* That's done the actual data area, everything else is human-friendly */
+
+
+
+
+
+ /* Add the text */
+ xoffset -= comp_offset;
+
+ if (text_flag) {
+ // caculate start xoffset to center text
+ xoffset = symbol->width / 2.0;
+ xoffset -= (strlen(symbol->text) / 2) * 5.0;
+
+ for (p = symbol->text; *p != 0; p++) {
+ if (p != symbol->text && *p == '(') xoffset += 3.0;
+ bchar = g_new0 (glBarcodeChar, 1);
+ bchar->x = (textpos + xoffset) * scaler;
+ bchar->y = default_text_posn;
+ bchar->fsize = 8.0 * scaler;
+ bchar->c = (gchar) *p;
+ gbc->chars = g_list_append (gbc->chars, bchar);
+ // Poor mans kerning
+ if (*p == '(') {
+ xoffset += 3.0;
+ } else if (*p == ')') {
+ xoffset += 3.0;
+ } else {
+ xoffset += 5.0;
+ }
+ }
+ }
+
+ return gbc;
+}
+
+/*
+ * Stolen from Zint common.c
+ */
+gint module_is_set(struct zint_symbol *symbol, gint y_coord, gint x_coord)
+{
+ return (symbol->encoded_data[y_coord][x_coord / 7] & (1 << (x_coord % 7))) ? 1 : 0;
+}
+
+#endif /* HAVE_LIBZINT */
+
+/*
+ * Local Variables: -- emacs
+ * mode: C -- emacs
+ * c-basic-offset: 8 -- emacs
+ * tab-width: 8 -- emacs
+ * indent-tabs-mode: nil -- emacs
+ * End: -- emacs
+ */
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