mirror of
https://github.com/zxing/zxing.git
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1c4f85ee24
git-svn-id: https://zxing.googlecode.com/svn/trunk@820 59b500cc-1b3d-0410-9834-0bbf25fbcc57
223 lines
8.8 KiB
C#
223 lines
8.8 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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namespace com.google.zxing.datamatrix.decoder
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{
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public sealed class Version
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{
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private static Version[] VERSIONS = buildVersions();
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private int versionNumber;
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private int symbolSizeRows;
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private int symbolSizeColumns;
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private int dataRegionSizeRows;
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private int dataRegionSizeColumns;
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private ECBlocks ecBlocks;
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private int totalCodewords;
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private Version(int versionNumber,
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int symbolSizeRows,
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int symbolSizeColumns,
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int dataRegionSizeRows,
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int dataRegionSizeColumns,
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ECBlocks ecBlocks) {
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this.versionNumber = versionNumber;
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this.symbolSizeRows = symbolSizeRows;
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this.symbolSizeColumns = symbolSizeColumns;
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this.dataRegionSizeRows = dataRegionSizeRows;
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this.dataRegionSizeColumns = dataRegionSizeColumns;
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this.ecBlocks = ecBlocks;
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// Calculate the total number of codewords
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int total = 0;
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int ecCodewords = ecBlocks.getECCodewords();
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ECB[] ecbArray = ecBlocks.getECBlocks();
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for (int i = 0; i < ecbArray.Length; i++) {
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ECB ecBlock = ecbArray[i];
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total += ecBlock.getCount() * (ecBlock.getDataCodewords() + ecCodewords);
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}
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this.totalCodewords = total;
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}
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public int getVersionNumber() {
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return versionNumber;
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}
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public int getSymbolSizeRows() {
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return symbolSizeRows;
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}
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public int getSymbolSizeColumns() {
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return symbolSizeColumns;
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}
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public int getDataRegionSizeRows() {
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return dataRegionSizeRows;
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}
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public int getDataRegionSizeColumns() {
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return dataRegionSizeColumns;
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}
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public int getTotalCodewords() {
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return totalCodewords;
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}
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public ECBlocks getECBlocks() {
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return ecBlocks;
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}
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/**
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* <p>Deduces version information from Data Matrix dimensions.</p>
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*
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* @param numRows Number of rows in modules
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* @param numColumns Number of columns in modules
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* @return {@link Version} for a Data Matrix Code of those dimensions
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* @throws ReaderException if dimensions do correspond to a valid Data Matrix size
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*/
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public static Version getVersionForDimensions(int numRows, int numColumns) {
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if ((numRows & 0x01) != 0 || (numColumns & 0x01) != 0) {
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throw new ReaderException();
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}
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// TODO(bbrown): This is doing a linear search through the array of versions.
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// If we interleave the rectangular versions with the square versions we could
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// do a binary search.
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int numVersions = VERSIONS.Length;
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for (int i = 0; i < numVersions; ++i){
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Version version = VERSIONS[i];
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if (version.symbolSizeRows == numRows && version.symbolSizeColumns == numColumns) {
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return version;
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}
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}
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throw new ReaderException();
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}
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/**
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* <p>Encapsulates a set of error-correction blocks in one symbol version. Most versions will
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* use blocks of differing sizes within one version, so, this encapsulates the parameters for
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* each set of blocks. It also holds the number of error-correction codewords per block since it
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* will be the same across all blocks within one version.</p>
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*/
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public class ECBlocks {
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private int ecCodewords;
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private ECB[] ecBlocks;
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public ECBlocks(int ecCodewords, ECB ecBlocks) {
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this.ecCodewords = ecCodewords;
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this.ecBlocks = new ECB[] { ecBlocks };
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}
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public ECBlocks(int ecCodewords, ECB ecBlocks1, ECB ecBlocks2) {
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this.ecCodewords = ecCodewords;
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this.ecBlocks = new ECB[] { ecBlocks1, ecBlocks2 };
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}
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public int getECCodewords() {
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return ecCodewords;
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}
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public ECB[] getECBlocks() {
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return ecBlocks;
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}
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}
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/**
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* <p>Encapsualtes the parameters for one error-correction block in one symbol version.
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* This includes the number of data codewords, and the number of times a block with these
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* parameters is used consecutively in the Data Matrix code version's format.</p>
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*/
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public class ECB {
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private int count;
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private int dataCodewords;
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public ECB(int count, int dataCodewords) {
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this.count = count;
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this.dataCodewords = dataCodewords;
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}
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public int getCount() {
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return count;
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}
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public int getDataCodewords() {
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return dataCodewords;
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}
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}
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public String toString() {
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return versionNumber.ToString();
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}
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/**
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* See ISO 16022:2006 5.5.1 Table 7
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*/
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private static Version[] buildVersions() {
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return new Version[]{
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new Version(1, 10, 10, 8, 8,
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new ECBlocks(5, new ECB(1, 3))),
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new Version(2, 12, 12, 10, 10,
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new ECBlocks(7, new ECB(1, 5))),
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new Version(3, 14, 14, 12, 12,
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new ECBlocks(10, new ECB(1, 8))),
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new Version(4, 16, 16, 14, 14,
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new ECBlocks(12, new ECB(1, 12))),
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new Version(5, 18, 18, 16, 16,
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new ECBlocks(14, new ECB(1, 18))),
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new Version(6, 20, 20, 18, 18,
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new ECBlocks(18, new ECB(1, 22))),
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new Version(7, 22, 22, 20, 20,
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new ECBlocks(20, new ECB(1, 30))),
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new Version(8, 24, 24, 22, 22,
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new ECBlocks(24, new ECB(1, 36))),
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new Version(9, 26, 26, 24, 24,
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new ECBlocks(28, new ECB(1, 44))),
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new Version(10, 32, 32, 14, 14,
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new ECBlocks(36, new ECB(1, 62))),
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new Version(11, 36, 36, 16, 16,
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new ECBlocks(42, new ECB(1, 86))),
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new Version(12, 40, 40, 18, 18,
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new ECBlocks(48, new ECB(1, 114))),
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new Version(13, 44, 44, 20, 20,
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new ECBlocks(56, new ECB(1, 144))),
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new Version(14, 48, 48, 22, 22,
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new ECBlocks(68, new ECB(1, 174))),
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new Version(15, 52, 52, 24, 24,
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new ECBlocks(42, new ECB(2, 102))),
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new Version(16, 64, 64, 14, 14,
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new ECBlocks(56, new ECB(2, 140))),
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new Version(17, 72, 72, 16, 16,
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new ECBlocks(36, new ECB(4, 92))),
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new Version(18, 80, 80, 18, 18,
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new ECBlocks(48, new ECB(4, 114))),
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new Version(19, 88, 88, 20, 20,
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new ECBlocks(56, new ECB(4, 144))),
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new Version(20, 96, 96, 22, 22,
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new ECBlocks(68, new ECB(4, 174))),
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new Version(21, 104, 104, 24, 24,
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new ECBlocks(56, new ECB(6, 136))),
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new Version(22, 120, 120, 18, 18,
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new ECBlocks(68, new ECB(6, 175))),
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new Version(23, 132, 132, 20, 20,
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new ECBlocks(62, new ECB(8, 163))),
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new Version(24, 144, 144, 22, 22,
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new ECBlocks(62, new ECB(8, 156), new ECB(2, 155))),
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new Version(25, 8, 18, 6, 16,
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new ECBlocks(7, new ECB(1, 5))),
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new Version(26, 8, 32, 6, 14,
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new ECBlocks(11, new ECB(1, 10))),
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new Version(27, 12, 26, 10, 24,
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new ECBlocks(14, new ECB(1, 16))),
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new Version(28, 12, 36, 10, 16,
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new ECBlocks(18, new ECB(1, 22))),
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new Version(29, 16, 36, 10, 16,
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new ECBlocks(24, new ECB(1, 32))),
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new Version(30, 16, 48, 14, 22,
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new ECBlocks(28, new ECB(1, 49)))
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};
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}
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}
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}
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