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Ultracode: Fix miscalculation of number of codewords when using reader initialisation

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This commit is contained in:
Robin Stuart 2020-10-04 10:32:57 +01:00
parent e37a82a8f1
commit 5a8bbb28f0
2 changed files with 7 additions and 6 deletions
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1
README
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@ -289,6 +289,7 @@ Bugs:
- Code16k selects GS1 mode by default in GUI
- Ultracode: use white pixels instead background for white modules.
- EMF: fix Ultracode colours.
- Ultracode: fix count of codewords when using reader init mode
CONTACT US
----------

12
backend/ultra.c
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@ -660,6 +660,7 @@ static int ultra_generate_codewords(struct zint_symbol *symbol, const unsigned c
if (symbol->output_options & READER_INIT) {
/* Reader Initialisation mode */
codeword_count = 2;
if (symbol_mode == ASCII_MODE) {
codewords[0] = 272; // 7-bit ASCII mode
codewords[1] = 271; // FNC3
@ -667,9 +668,9 @@ static int ultra_generate_codewords(struct zint_symbol *symbol, const unsigned c
codewords[0] = 257; // 8859-1
codewords[1] = 269; // FNC3
}
codeword_count = 2;
} else {
/* Calculate start character codeword */
codeword_count = 1;
if (symbol_mode == ASCII_MODE) {
if (gs1) {
codewords[0] = 273;
@ -688,7 +689,7 @@ static int ultra_generate_codewords(struct zint_symbol *symbol, const unsigned c
// ECI indicates use of character set outside ISO/IEC 8859
codewords[0] = 275 + (symbol->eci / 256);
codewords[1] = symbol->eci % 256;
codeword_count++;
codeword_count = 2;
} else if (symbol->eci == 899) {
// Non-language byte data
codewords[0] = 280;
@ -699,7 +700,7 @@ static int ultra_generate_codewords(struct zint_symbol *symbol, const unsigned c
codewords[1] = 274; // Encode ECI as 3 codewords
codewords[2] = (symbol->eci / 100) + 128;
codewords[3] = (symbol->eci % 100) + 128;
codeword_count += 3;
codeword_count = 4;
} else if (symbol->eci >= 10000) {
// Encode as 4 codewords
codewords[0] = 257; // ISO/IEC 8859-1 used to enter 8-bit mode
@ -707,7 +708,7 @@ static int ultra_generate_codewords(struct zint_symbol *symbol, const unsigned c
codewords[2] = (symbol->eci / 10000) + 128;
codewords[3] = ((symbol->eci % 10000) / 100) + 128;
codewords[4] = (symbol->eci % 100) + 128;
codeword_count += 4;
codeword_count = 5;
} else {
codewords[0] = 257; // Default is assumed to be ISO/IEC 8859-1 (ECI 3)
}
@ -733,8 +734,6 @@ static int ultra_generate_codewords(struct zint_symbol *symbol, const unsigned c
}
}
codeword_count++;
/* Check for 06 Macro Sequence and crop accordingly */
if (in_length >= 9
&& source[0] == '[' && source[1] == ')' && source[2] == '>' && source[3] == '\x1e'
@ -969,6 +968,7 @@ INTERNAL int ultracode(struct zint_symbol *symbol, const unsigned char source[],
locn = 0;
/* Calculate error correction codewords (RSEC) */
ultra_gf283((short) data_cw_count, (short) qcc, data_codewords);
/* Rearrange to make final codeword sequence */