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https://github.com/zint/zint
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Update DotCode to latest draft (April 24, 2017)
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Robin Stuart
parent
fd8a4f4d35
commit
847fa6f332
@ -2,7 +2,7 @@
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/*
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libzint - the open source barcode library
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Copyright (C) 2016 Robin Stuart <rstuart114@gmail.com>
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Copyright (C) 2017 Robin Stuart <rstuart114@gmail.com>
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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@ -78,10 +78,77 @@ int get_dot(char Dots[], int Hgt, int Wid, int x, int y) {
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return retval;
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}
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int clr_col(char *Dots, int Hgt, int Wid, int x) {
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int y;
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for (y = x & 1; y < Hgt; y += 2) {
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if (get_dot(Dots, Hgt, Wid, x, y)) {
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return 0;
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}
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}
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return 1;
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}
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int clr_row(char *Dots, int Hgt, int Wid, int y) {
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int x;
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for (x = y & 1; x < Wid; x += 2) {
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if (get_dot(Dots, Hgt, Wid, x, y)) {
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return 0;
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}
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}
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return 1;
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}
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/* Dot pattern scoring routine from Annex A */
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int score_array(char Dots[], int Hgt, int Wid) {
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int x, y, worstedge, first, last, sum;
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int penalty_local = 0;
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int penalty = 0;
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// first, guard against "pathelogical" gaps in the array
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if (Hgt & 1) {
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if (Hgt < 12) {
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sum = 0;
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for (x = 1; x < Wid - 1; x++) {
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if (!(clr_col(Dots, Hgt, Wid, x))) {
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sum = 0;
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if (penalty_local) {
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penalty += penalty_local;
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penalty_local = 0;
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}
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} else {
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sum++;
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if (sum == 1) {
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penalty_local = Hgt;
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} else {
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penalty_local *= Hgt;
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}
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}
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}
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}
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} else {
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if (Wid < 12) {
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sum = 0;
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for (y = 1; y < Hgt - 1; y++) {
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if (!(clr_row(Dots, Hgt, Wid, y))) {
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sum = 0;
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if (penalty_local) {
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penalty += penalty_local;
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penalty_local = 0;
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}
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} else {
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sum++;
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if (sum == 1) {
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penalty_local = Wid;
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} else {
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penalty_local *= Wid;
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}
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}
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}
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}
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}
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sum = 0;
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first = -1;
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last = -1;
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@ -100,6 +167,7 @@ int score_array(char Dots[], int Hgt, int Wid) {
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sum = 0;
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first = -1;
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last = -1;
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//across the bottom edge, ditto
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for (x = Wid & 1; x < Wid; x += 2)
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@ -118,6 +186,7 @@ int score_array(char Dots[], int Hgt, int Wid) {
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sum = 0;
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first = -1;
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last = -1;
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//down the left edge, ditto
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for (y = 0; y < Hgt; y += 2)
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@ -136,6 +205,7 @@ int score_array(char Dots[], int Hgt, int Wid) {
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sum = 0;
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first = -1;
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last = -1;
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//down the right edge, ditto
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for (y = Hgt & 1; y < Hgt; y += 2)
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@ -171,7 +241,7 @@ int score_array(char Dots[], int Hgt, int Wid) {
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}
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}
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return (worstedge - sum * sum);
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return (worstedge - sum * sum - penalty);
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}
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//-------------------------------------------------------------------------
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@ -240,7 +310,7 @@ int datum_b(const unsigned char source[], int position, int length) {
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int retval = 0;
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if (position < length) {
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if (source[position] >= 32) {
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if ((source[position] >= 32) && (source[position] <= 127)) {
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retval = 1;
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}
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@ -388,20 +458,73 @@ int dotcode_encode_message(struct zint_symbol *symbol, const unsigned char sourc
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}
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if (symbol->input_mode != GS1_MODE) {
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codeword_array[array_length] = 107; // FNC1
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array_length++;
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if (length > 2) {
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if (((source[input_position] >= '0') && (source[input_position] <= '9')) &&
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((source[input_position + 1] >= '0') && (source[input_position + 1] <= '9'))) {
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codeword_array[array_length] = 107; // FNC1
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array_length++;
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}
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}
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}
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if (symbol->eci > 3) {
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codeword_array[array_length] = 108; // FNC2
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array_length++;
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codeword_array[array_length] = symbol->eci;
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array_length++;
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if (symbol->eci <= 39) {
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codeword_array[array_length] = symbol->eci;
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array_length++;
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} else {
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// the next three codewords valued A, B & C encode the ECI value of
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// (A - 40) * 12769 + B * 113 + C + 40 (Section 5.2.1)
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int a, b, c;
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a = (symbol->eci - 40) % 12769;
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b = ((symbol->eci - 40) - (12769 * a)) % 113;
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c = (symbol->eci - 40) - (12769 * a) - (113 * b);
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codeword_array[array_length] = a + 40;
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array_length++;
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codeword_array[array_length] = b;
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array_length++;
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codeword_array[array_length] = c;
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array_length++;
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}
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}
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// Prevent encodation as a macro if a special character is in first position
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if (source[input_position] == 9) {
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codeword_array[array_length] = 101; // Latch A
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array_length++;
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codeword_array[array_length] = 73; // HT
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array_length++;
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encoding_mode = 'A';
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}
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if (source[input_position] == 28) {
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codeword_array[array_length] = 101; // Latch A
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array_length++;
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codeword_array[array_length] = 92; // FS
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array_length++;
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encoding_mode = 'A';
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}
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if (source[input_position] == 29) {
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codeword_array[array_length] = 101; // Latch A
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array_length++;
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codeword_array[array_length] = 93; // GS
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array_length++;
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encoding_mode = 'A';
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}
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if (source[input_position] == 30) {
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codeword_array[array_length] = 101; // Latch A
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array_length++;
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codeword_array[array_length] = 94; // RS
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array_length++;
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encoding_mode = 'A';
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}
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do {
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done = 0;
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/* Step A */
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if ((input_position == length - 2) && (inside_macro != 0) && (inside_macro != 100)) {
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// inside_macro only gets set to 97, 98 or 99 if the last two characters are RS/EOT
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@ -430,12 +553,11 @@ int dotcode_encode_message(struct zint_symbol *symbol, const unsigned char sourc
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&& (source[input_position + 3] == 30) // RS
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&& (source[length - 1] == 04)) { // EOT
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codeword_array[array_length] = 106; // Latch B
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array_length++;
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encoding_mode = 'B';
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if ((source[input_position + 6] == 29) && (source[length - 2] == 30)) { // GS/RS
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if ((source[input_position + 4] == '0') && (source[input_position + 5] == '5')) {
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codeword_array[array_length] = 102; // Shift B
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array_length++;
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codeword_array[array_length] = 97; // Macro
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array_length++;
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input_position += 7;
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@ -447,6 +569,8 @@ int dotcode_encode_message(struct zint_symbol *symbol, const unsigned char sourc
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}
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if ((source[input_position + 4] == '0') && (source[input_position + 5] == '6')) {
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codeword_array[array_length] = 102; // Shift B
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array_length++;
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codeword_array[array_length] = 98; // Macro
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array_length++;
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input_position += 7;
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@ -458,6 +582,8 @@ int dotcode_encode_message(struct zint_symbol *symbol, const unsigned char sourc
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}
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if ((source[input_position + 4] == '1') && (source[input_position + 5] == '2')) {
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codeword_array[array_length] = 102; // Shift B
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array_length++;
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codeword_array[array_length] = 99; // Macro
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array_length++;
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input_position += 7;
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@ -469,7 +595,10 @@ int dotcode_encode_message(struct zint_symbol *symbol, const unsigned char sourc
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}
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}
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if (!done) {
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if ((!done) && (source[input_position] >= '0') && (source[input_position] <= '9') &&
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(source[input_position + 1] >= '0') && (source[input_position + 1] <= '9')) {
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codeword_array[array_length] = 102; // Shift B
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array_length++;
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codeword_array[array_length] = 100; // Macro
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array_length++;
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input_position += 4;
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@ -912,6 +1041,18 @@ int dotcode_encode_message(struct zint_symbol *symbol, const unsigned char sourc
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} while (input_position < length);
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if (encoding_mode == 'X') {
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if (binary_buffer_size != 0) {
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/* Empty binary buffer */
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for (i = 0; i < (binary_buffer_size + 1); i++) {
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lawrencium[i] = binary_buffer % 103;
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binary_buffer /= 103;
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}
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for (i = 0; i < (binary_buffer_size + 1); i++) {
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codeword_array[array_length] = lawrencium[binary_buffer_size - i];
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array_length++;
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}
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}
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*(binary_finish) = 1;
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}
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