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/*
This file is part of the iText (R) project.
Copyright (c) 1998-2022 iText Group NV
Authors: Bruno Lowagie, Paulo Soares, et al.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License version 3
as published by the Free Software Foundation with the addition of the
following permission added to Section 15 as permitted in Section 7(a):
FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
OF THIRD PARTY RIGHTS
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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program; if not, see http://www.gnu.org/licenses or write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA, 02110-1301 USA, or download the license from the following URL:
http://itextpdf.com/terms-of-use/
The interactive user interfaces in modified source and object code versions
of this program must display Appropriate Legal Notices, as required under
Section 5 of the GNU Affero General Public License.
In accordance with Section 7(b) of the GNU Affero General Public License,
a covered work must retain the producer line in every PDF that is created
or manipulated using iText.
You can be released from the requirements of the license by purchasing
a commercial license. Buying such a license is mandatory as soon as you
develop commercial activities involving the iText software without
disclosing the source code of your own applications.
These activities include: offering paid services to customers as an ASP,
serving PDFs on the fly in a web application, shipping iText with a closed
source product.
For more information, please contact iText Software Corp. at this
address: [email protected]
*/
package com.itextpdf.barcodes.qrcode;
/**
* See ISO 18004:2006 Annex D.
*
* @author Sean Owen
*/
final class Version {
/**
* See ISO 18004:2006 Annex D.
* Element i represents the raw version bits that specify version i + 7
*/
private static final int[] VERSION_DECODE_INFO = {
0x07C94, 0x085BC, 0x09A99, 0x0A4D3, 0x0BBF6,
0x0C762, 0x0D847, 0x0E60D, 0x0F928, 0x10B78,
0x1145D, 0x12A17, 0x13532, 0x149A6, 0x15683,
0x168C9, 0x177EC, 0x18EC4, 0x191E1, 0x1AFAB,
0x1B08E, 0x1CC1A, 0x1D33F, 0x1ED75, 0x1F250,
0x209D5, 0x216F0, 0x228BA, 0x2379F, 0x24B0B,
0x2542E, 0x26A64, 0x27541, 0x28C69
};
private static final Version[] VERSIONS = buildVersions();
private final int versionNumber;
private final int[] alignmentPatternCenters;
private final ECBlocks[] ecBlocks;
private final int totalCodewords;
private Version(int versionNumber,
int[] alignmentPatternCenters,
ECBlocks ecBlocks1,
ECBlocks ecBlocks2,
ECBlocks ecBlocks3,
ECBlocks ecBlocks4) {
this.versionNumber = versionNumber;
this.alignmentPatternCenters = (int[]) alignmentPatternCenters.clone();
this.ecBlocks = new ECBlocks[]{ecBlocks1, ecBlocks2, ecBlocks3, ecBlocks4};
int total = 0;
int ecCodewords = ecBlocks1.getECCodewordsPerBlock();
ECB[] ecbArray = ecBlocks1.getECBlocks();
for (int i = 0; i < ecbArray.length; i++) {
ECB ecBlock = ecbArray[i];
total += ecBlock.getCount() * (ecBlock.getDataCodewords() + ecCodewords);
}
this.totalCodewords = total;
}
/**
* @return the version number
*/
public int getVersionNumber() {
return versionNumber;
}
/**
* @return int[] containing the positions of the alignment pattern centers
*/
public int[] getAlignmentPatternCenters() {
return alignmentPatternCenters;
}
/**
* @return total number of code words
*/
public int getTotalCodewords() {
return totalCodewords;
}
/**
* @return the square dimension for the current version number
*/
public int getDimensionForVersion() {
return 17 + 4 * versionNumber;
}
/**
* @param ecLevel error correction level
* @return the number of EC blocks for the given error correction level
*/
public ECBlocks getECBlocksForLevel(ErrorCorrectionLevel ecLevel) {
return ecBlocks[ecLevel.ordinal()];
}
/**
* Deduces version information purely from QR Code dimensions.
*
* @param dimension dimension in modules
* @return {@link Version} for a QR Code of that dimension
*/
public static Version getProvisionalVersionForDimension(int dimension) {
if (dimension % 4 != 1) {
throw new IllegalArgumentException();
}
try {
return getVersionForNumber((dimension - 17) >> 2);
} catch (IllegalArgumentException iae) {
throw iae;
}
}
/**
* @param versionNumber Version number
* @return the version for the given version number
*/
public static Version getVersionForNumber(int versionNumber) {
if (versionNumber < 1 || versionNumber > 40) {
throw new IllegalArgumentException();
}
return VERSIONS[versionNumber - 1];
}
/**
* Decode the version information.
* @param versionBits bits stored as int containing
* @return Version decoded from the versionBits
*/
static Version decodeVersionInformation(int versionBits) {
int bestDifference = Integer.MAX_VALUE;
int bestVersion = 0;
for (int i = 0; i < VERSION_DECODE_INFO.length; i++) {
int targetVersion = VERSION_DECODE_INFO[i];
// Do the version info bits match exactly? done.
if (targetVersion == versionBits) {
return getVersionForNumber(i + 7);
}
// Otherwise see if this is the closest to a real version info bit string
// we have seen so far
int bitsDifference = FormatInformation.numBitsDiffering(versionBits, targetVersion);
if (bitsDifference < bestDifference) {
bestVersion = i + 7;
bestDifference = bitsDifference;
}
}
// We can tolerate up to 3 bits of error since no two version info codewords will
// differ in less than 4 bits.
if (bestDifference <= 3) {
return getVersionForNumber(bestVersion);
}
// If we didn't find a close enough match, fail
return null;
}
/**
* Build the function pattern, See ISO 18004:2006 Annex E.
* @return Bitmatrix containing the pattern
*/
BitMatrix buildFunctionPattern() {
int dimension = getDimensionForVersion();
BitMatrix bitMatrix = new BitMatrix(dimension);
// Top left finder pattern + separator + format
bitMatrix.setRegion(0, 0, 9, 9);
// Top right finder pattern + separator + format
bitMatrix.setRegion(dimension - 8, 0, 8, 9);
// Bottom left finder pattern + separator + format
bitMatrix.setRegion(0, dimension - 8, 9, 8);
// Alignment patterns
int max = alignmentPatternCenters.length;
for (int x = 0; x < max; x++) {
int i = alignmentPatternCenters[x] - 2;
for (int y = 0; y < max; y++) {
if ((x == 0 && (y == 0 || y == max - 1)) || (x == max - 1 && y == 0)) {
// No alignment patterns near the three finder paterns
continue;
}
bitMatrix.setRegion(alignmentPatternCenters[y] - 2, i, 5, 5);
}
}
// Vertical timing pattern
bitMatrix.setRegion(6, 9, 1, dimension - 17);
// Horizontal timing pattern
bitMatrix.setRegion(9, 6, dimension - 17, 1);
if (versionNumber > 6) {
// Version info, top right
bitMatrix.setRegion(dimension - 11, 0, 3, 6);
// Version info, bottom left
bitMatrix.setRegion(0, dimension - 11, 6, 3);
}
return bitMatrix;
}
/**
* Encapsulates a set of error-correction blocks in one symbol version. Most versions will
* use blocks of differing sizes within one version, so, this encapsulates the parameters for
* each set of blocks. It also holds the number of error-correction codewords per block since it
* will be the same across all blocks within one version.
*/
public static final class ECBlocks {
private final int ecCodewordsPerBlock;
private final ECB[] ecBlocks;
ECBlocks(int ecCodewordsPerBlock, ECB ecBlocks) {
this.ecCodewordsPerBlock = ecCodewordsPerBlock;
this.ecBlocks = new ECB[]{ecBlocks};
}
ECBlocks(int ecCodewordsPerBlock, ECB ecBlocks1, ECB ecBlocks2) {
this.ecCodewordsPerBlock = ecCodewordsPerBlock;
this.ecBlocks = new ECB[]{ecBlocks1, ecBlocks2};
}
/**
* @return The number of error-correction words per block
*/
public int getECCodewordsPerBlock() {
return ecCodewordsPerBlock;
}
public int getNumBlocks() {
int total = 0;
for (int i = 0; i < ecBlocks.length; i++) {
total += ecBlocks[i].getCount();
}
return total;
}
/**
* @return the total number of error-correction words
*/
public int getTotalECCodewords() {
return ecCodewordsPerBlock * getNumBlocks();
}
public ECB[] getECBlocks() {
return ecBlocks;
}
}
/**
* Encapsualtes the parameters for one error-correction block in one symbol version.
* This includes the number of data codewords, and the number of times a block with these
* parameters is used consecutively in the QR code version's format.
*/
public static final class ECB {
private final int count;
private final int dataCodewords;
ECB(int count, int dataCodewords) {
this.count = count;
this.dataCodewords = dataCodewords;
}
public int getCount() {
return count;
}
public int getDataCodewords() {
return dataCodewords;
}
}
/**
* @return The version number as a string
*/
public String toString() {
return Integer.toString(versionNumber);
}
/**
* See ISO 18004:2006 6.5.1 Table 9.
*/
private static Version[] buildVersions() {
return new Version[]{
new Version(1, new int[]{},
new ECBlocks(7, new ECB(1, 19)),
new ECBlocks(10, new ECB(1, 16)),
new ECBlocks(13, new ECB(1, 13)),
new ECBlocks(17, new ECB(1, 9))),
new Version(2, new int[]{6, 18},
new ECBlocks(10, new ECB(1, 34)),
new ECBlocks(16, new ECB(1, 28)),
new ECBlocks(22, new ECB(1, 22)),
new ECBlocks(28, new ECB(1, 16))),
new Version(3, new int[]{6, 22},
new ECBlocks(15, new ECB(1, 55)),
new ECBlocks(26, new ECB(1, 44)),
new ECBlocks(18, new ECB(2, 17)),
new ECBlocks(22, new ECB(2, 13))),
new Version(4, new int[]{6, 26},
new ECBlocks(20, new ECB(1, 80)),
new ECBlocks(18, new ECB(2, 32)),
new ECBlocks(26, new ECB(2, 24)),
new ECBlocks(16, new ECB(4, 9))),
new Version(5, new int[]{6, 30},
new ECBlocks(26, new ECB(1, 108)),
new ECBlocks(24, new ECB(2, 43)),
new ECBlocks(18, new ECB(2, 15),
new ECB(2, 16)),
new ECBlocks(22, new ECB(2, 11),
new ECB(2, 12))),
new Version(6, new int[]{6, 34},
new ECBlocks(18, new ECB(2, 68)),
new ECBlocks(16, new ECB(4, 27)),
new ECBlocks(24, new ECB(4, 19)),
new ECBlocks(28, new ECB(4, 15))),
new Version(7, new int[]{6, 22, 38},
new ECBlocks(20, new ECB(2, 78)),
new ECBlocks(18, new ECB(4, 31)),
new ECBlocks(18, new ECB(2, 14),
new ECB(4, 15)),
new ECBlocks(26, new ECB(4, 13),
new ECB(1, 14))),
new Version(8, new int[]{6, 24, 42},
new ECBlocks(24, new ECB(2, 97)),
new ECBlocks(22, new ECB(2, 38),
new ECB(2, 39)),
new ECBlocks(22, new ECB(4, 18),
new ECB(2, 19)),
new ECBlocks(26, new ECB(4, 14),
new ECB(2, 15))),
new Version(9, new int[]{6, 26, 46},
new ECBlocks(30, new ECB(2, 116)),
new ECBlocks(22, new ECB(3, 36),
new ECB(2, 37)),
new ECBlocks(20, new ECB(4, 16),
new ECB(4, 17)),
new ECBlocks(24, new ECB(4, 12),
new ECB(4, 13))),
new Version(10, new int[]{6, 28, 50},
new ECBlocks(18, new ECB(2, 68),
new ECB(2, 69)),
new ECBlocks(26, new ECB(4, 43),
new ECB(1, 44)),
new ECBlocks(24, new ECB(6, 19),
new ECB(2, 20)),
new ECBlocks(28, new ECB(6, 15),
new ECB(2, 16))),
new Version(11, new int[]{6, 30, 54},
new ECBlocks(20, new ECB(4, 81)),
new ECBlocks(30, new ECB(1, 50),
new ECB(4, 51)),
new ECBlocks(28, new ECB(4, 22),
new ECB(4, 23)),
new ECBlocks(24, new ECB(3, 12),
new ECB(8, 13))),
new Version(12, new int[]{6, 32, 58},
new ECBlocks(24, new ECB(2, 92),
new ECB(2, 93)),
new ECBlocks(22, new ECB(6, 36),
new ECB(2, 37)),
new ECBlocks(26, new ECB(4, 20),
new ECB(6, 21)),
new ECBlocks(28, new ECB(7, 14),
new ECB(4, 15))),
new Version(13, new int[]{6, 34, 62},
new ECBlocks(26, new ECB(4, 107)),
new ECBlocks(22, new ECB(8, 37),
new ECB(1, 38)),
new ECBlocks(24, new ECB(8, 20),
new ECB(4, 21)),
new ECBlocks(22, new ECB(12, 11),
new ECB(4, 12))),
new Version(14, new int[]{6, 26, 46, 66},
new ECBlocks(30, new ECB(3, 115),
new ECB(1, 116)),
new ECBlocks(24, new ECB(4, 40),
new ECB(5, 41)),
new ECBlocks(20, new ECB(11, 16),
new ECB(5, 17)),
new ECBlocks(24, new ECB(11, 12),
new ECB(5, 13))),
new Version(15, new int[]{6, 26, 48, 70},
new ECBlocks(22, new ECB(5, 87),
new ECB(1, 88)),
new ECBlocks(24, new ECB(5, 41),
new ECB(5, 42)),
new ECBlocks(30, new ECB(5, 24),
new ECB(7, 25)),
new ECBlocks(24, new ECB(11, 12),
new ECB(7, 13))),
new Version(16, new int[]{6, 26, 50, 74},
new ECBlocks(24, new ECB(5, 98),
new ECB(1, 99)),
new ECBlocks(28, new ECB(7, 45),
new ECB(3, 46)),
new ECBlocks(24, new ECB(15, 19),
new ECB(2, 20)),
new ECBlocks(30, new ECB(3, 15),
new ECB(13, 16))),
new Version(17, new int[]{6, 30, 54, 78},
new ECBlocks(28, new ECB(1, 107),
new ECB(5, 108)),
new ECBlocks(28, new ECB(10, 46),
new ECB(1, 47)),
new ECBlocks(28, new ECB(1, 22),
new ECB(15, 23)),
new ECBlocks(28, new ECB(2, 14),
new ECB(17, 15))),
new Version(18, new int[]{6, 30, 56, 82},
new ECBlocks(30, new ECB(5, 120),
new ECB(1, 121)),
new ECBlocks(26, new ECB(9, 43),
new ECB(4, 44)),
new ECBlocks(28, new ECB(17, 22),
new ECB(1, 23)),
new ECBlocks(28, new ECB(2, 14),
new ECB(19, 15))),
new Version(19, new int[]{6, 30, 58, 86},
new ECBlocks(28, new ECB(3, 113),
new ECB(4, 114)),
new ECBlocks(26, new ECB(3, 44),
new ECB(11, 45)),
new ECBlocks(26, new ECB(17, 21),
new ECB(4, 22)),
new ECBlocks(26, new ECB(9, 13),
new ECB(16, 14))),
new Version(20, new int[]{6, 34, 62, 90},
new ECBlocks(28, new ECB(3, 107),
new ECB(5, 108)),
new ECBlocks(26, new ECB(3, 41),
new ECB(13, 42)),
new ECBlocks(30, new ECB(15, 24),
new ECB(5, 25)),
new ECBlocks(28, new ECB(15, 15),
new ECB(10, 16))),
new Version(21, new int[]{6, 28, 50, 72, 94},
new ECBlocks(28, new ECB(4, 116),
new ECB(4, 117)),
new ECBlocks(26, new ECB(17, 42)),
new ECBlocks(28, new ECB(17, 22),
new ECB(6, 23)),
new ECBlocks(30, new ECB(19, 16),
new ECB(6, 17))),
new Version(22, new int[]{6, 26, 50, 74, 98},
new ECBlocks(28, new ECB(2, 111),
new ECB(7, 112)),
new ECBlocks(28, new ECB(17, 46)),
new ECBlocks(30, new ECB(7, 24),
new ECB(16, 25)),
new ECBlocks(24, new ECB(34, 13))),
new Version(23, new int[]{6, 30, 54, 74, 102},
new ECBlocks(30, new ECB(4, 121),
new ECB(5, 122)),
new ECBlocks(28, new ECB(4, 47),
new ECB(14, 48)),
new ECBlocks(30, new ECB(11, 24),
new ECB(14, 25)),
new ECBlocks(30, new ECB(16, 15),
new ECB(14, 16))),
new Version(24, new int[]{6, 28, 54, 80, 106},
new ECBlocks(30, new ECB(6, 117),
new ECB(4, 118)),
new ECBlocks(28, new ECB(6, 45),
new ECB(14, 46)),
new ECBlocks(30, new ECB(11, 24),
new ECB(16, 25)),
new ECBlocks(30, new ECB(30, 16),
new ECB(2, 17))),
new Version(25, new int[]{6, 32, 58, 84, 110},
new ECBlocks(26, new ECB(8, 106),
new ECB(4, 107)),
new ECBlocks(28, new ECB(8, 47),
new ECB(13, 48)),
new ECBlocks(30, new ECB(7, 24),
new ECB(22, 25)),
new ECBlocks(30, new ECB(22, 15),
new ECB(13, 16))),
new Version(26, new int[]{6, 30, 58, 86, 114},
new ECBlocks(28, new ECB(10, 114),
new ECB(2, 115)),
new ECBlocks(28, new ECB(19, 46),
new ECB(4, 47)),
new ECBlocks(28, new ECB(28, 22),
new ECB(6, 23)),
new ECBlocks(30, new ECB(33, 16),
new ECB(4, 17))),
new Version(27, new int[]{6, 34, 62, 90, 118},
new ECBlocks(30, new ECB(8, 122),
new ECB(4, 123)),
new ECBlocks(28, new ECB(22, 45),
new ECB(3, 46)),
new ECBlocks(30, new ECB(8, 23),
new ECB(26, 24)),
new ECBlocks(30, new ECB(12, 15),
new ECB(28, 16))),
new Version(28, new int[]{6, 26, 50, 74, 98, 122},
new ECBlocks(30, new ECB(3, 117),
new ECB(10, 118)),
new ECBlocks(28, new ECB(3, 45),
new ECB(23, 46)),
new ECBlocks(30, new ECB(4, 24),
new ECB(31, 25)),
new ECBlocks(30, new ECB(11, 15),
new ECB(31, 16))),
new Version(29, new int[]{6, 30, 54, 78, 102, 126},
new ECBlocks(30, new ECB(7, 116),
new ECB(7, 117)),
new ECBlocks(28, new ECB(21, 45),
new ECB(7, 46)),
new ECBlocks(30, new ECB(1, 23),
new ECB(37, 24)),
new ECBlocks(30, new ECB(19, 15),
new ECB(26, 16))),
new Version(30, new int[]{6, 26, 52, 78, 104, 130},
new ECBlocks(30, new ECB(5, 115),
new ECB(10, 116)),
new ECBlocks(28, new ECB(19, 47),
new ECB(10, 48)),
new ECBlocks(30, new ECB(15, 24),
new ECB(25, 25)),
new ECBlocks(30, new ECB(23, 15),
new ECB(25, 16))),
new Version(31, new int[]{6, 30, 56, 82, 108, 134},
new ECBlocks(30, new ECB(13, 115),
new ECB(3, 116)),
new ECBlocks(28, new ECB(2, 46),
new ECB(29, 47)),
new ECBlocks(30, new ECB(42, 24),
new ECB(1, 25)),
new ECBlocks(30, new ECB(23, 15),
new ECB(28, 16))),
new Version(32, new int[]{6, 34, 60, 86, 112, 138},
new ECBlocks(30, new ECB(17, 115)),
new ECBlocks(28, new ECB(10, 46),
new ECB(23, 47)),
new ECBlocks(30, new ECB(10, 24),
new ECB(35, 25)),
new ECBlocks(30, new ECB(19, 15),
new ECB(35, 16))),
new Version(33, new int[]{6, 30, 58, 86, 114, 142},
new ECBlocks(30, new ECB(17, 115),
new ECB(1, 116)),
new ECBlocks(28, new ECB(14, 46),
new ECB(21, 47)),
new ECBlocks(30, new ECB(29, 24),
new ECB(19, 25)),
new ECBlocks(30, new ECB(11, 15),
new ECB(46, 16))),
new Version(34, new int[]{6, 34, 62, 90, 118, 146},
new ECBlocks(30, new ECB(13, 115),
new ECB(6, 116)),
new ECBlocks(28, new ECB(14, 46),
new ECB(23, 47)),
new ECBlocks(30, new ECB(44, 24),
new ECB(7, 25)),
new ECBlocks(30, new ECB(59, 16),
new ECB(1, 17))),
new Version(35, new int[]{6, 30, 54, 78, 102, 126, 150},
new ECBlocks(30, new ECB(12, 121),
new ECB(7, 122)),
new ECBlocks(28, new ECB(12, 47),
new ECB(26, 48)),
new ECBlocks(30, new ECB(39, 24),
new ECB(14, 25)),
new ECBlocks(30, new ECB(22, 15),
new ECB(41, 16))),
new Version(36, new int[]{6, 24, 50, 76, 102, 128, 154},
new ECBlocks(30, new ECB(6, 121),
new ECB(14, 122)),
new ECBlocks(28, new ECB(6, 47),
new ECB(34, 48)),
new ECBlocks(30, new ECB(46, 24),
new ECB(10, 25)),
new ECBlocks(30, new ECB(2, 15),
new ECB(64, 16))),
new Version(37, new int[]{6, 28, 54, 80, 106, 132, 158},
new ECBlocks(30, new ECB(17, 122),
new ECB(4, 123)),
new ECBlocks(28, new ECB(29, 46),
new ECB(14, 47)),
new ECBlocks(30, new ECB(49, 24),
new ECB(10, 25)),
new ECBlocks(30, new ECB(24, 15),
new ECB(46, 16))),
new Version(38, new int[]{6, 32, 58, 84, 110, 136, 162},
new ECBlocks(30, new ECB(4, 122),
new ECB(18, 123)),
new ECBlocks(28, new ECB(13, 46),
new ECB(32, 47)),
new ECBlocks(30, new ECB(48, 24),
new ECB(14, 25)),
new ECBlocks(30, new ECB(42, 15),
new ECB(32, 16))),
new Version(39, new int[]{6, 26, 54, 82, 110, 138, 166},
new ECBlocks(30, new ECB(20, 117),
new ECB(4, 118)),
new ECBlocks(28, new ECB(40, 47),
new ECB(7, 48)),
new ECBlocks(30, new ECB(43, 24),
new ECB(22, 25)),
new ECBlocks(30, new ECB(10, 15),
new ECB(67, 16))),
new Version(40, new int[]{6, 30, 58, 86, 114, 142, 170},
new ECBlocks(30, new ECB(19, 118),
new ECB(6, 119)),
new ECBlocks(28, new ECB(18, 47),
new ECB(31, 48)),
new ECBlocks(30, new ECB(34, 24),
new ECB(34, 25)),
new ECBlocks(30, new ECB(20, 15),
new ECB(61, 16)))
};
}
}
