75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
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/*
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* Copyright 2016 Nu-book Inc.
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* Copyright 2016 ZXing authors
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*/
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// SPDX-License-Identifier: Apache-2.0
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#pragma once
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namespace ZXing::DataMatrix {
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/**
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* The Version object encapsulates attributes about a particular Data Matrix Symbol size.
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*/
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class Version
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{
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public:
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/**
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* 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.
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*/
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struct ECBlocks
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{
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int codewordsPerBlock;
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/* Encapsulates 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.
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*/
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struct
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{
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int count;
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int dataCodewords;
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} const blocks[2];
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int numBlocks() const { return blocks[0].count + blocks[1].count; }
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int totalDataCodewords() const
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{
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return blocks[0].count * (blocks[0].dataCodewords + codewordsPerBlock) +
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blocks[1].count * (blocks[1].dataCodewords + codewordsPerBlock);
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}
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};
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const int versionNumber;
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const int symbolHeight;
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const int symbolWidth;
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const int dataBlockHeight;
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const int dataBlockWidth;
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const ECBlocks ecBlocks;
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int totalCodewords() const { return ecBlocks.totalDataCodewords(); }
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int dataWidth() const { return (symbolWidth / dataBlockWidth) * dataBlockWidth; }
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int dataHeight() const { return (symbolHeight / dataBlockHeight) * dataBlockHeight; }
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bool isDMRE() const { return versionNumber >= 31 && versionNumber <= 48; }
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};
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/**
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* @brief Looks up Version information based on symbol dimensions.
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*
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* @param height Number of rows in modules
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* @param width Number of columns in modules
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* @return Version for a Data Matrix Code of those dimensions, nullputr for invalid dimensions
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*/
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const Version* VersionForDimensions(int height, int width);
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template<typename MAT>
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const Version* VersionForDimensionsOf(const MAT& mat)
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{
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return VersionForDimensions(mat.height(), mat.width());
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}
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} // namespace ZXing::DataMatrix
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