79 lines
2.1 KiB
C++
79 lines
2.1 KiB
C++
/*
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* Copyright 2016 Huy Cuong Nguyen
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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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#include "ODITFWriter.h"
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#include "ODWriterHelper.h"
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#include "Utf.h"
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#include <array>
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#include <stdexcept>
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#include <vector>
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namespace ZXing::OneD {
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static const std::array<int, 4> START_PATTERN = { 1, 1, 1, 1 };
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static const std::array<int, 3> END_PATTERN = { 3, 1, 1 };
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static const int W = 3; // Pixel width of a wide line
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static const int N = 1; // Pixed width of a narrow line
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/**
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* Patterns of Wide / Narrow lines to indicate each digit
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*/
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static const std::array<std::array<int, 5>, 10> PATTERNS = {
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N, N, W, W, N, // 0
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W, N, N, N, W, // 1
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N, W, N, N, W, // 2
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W, W, N, N, N, // 3
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N, N, W, N, W, // 4
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W, N, W, N, N, // 5
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N, W, W, N, N, // 6
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N, N, N, W, W, // 7
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W, N, N, W, N, // 8
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N, W, N, W, N, // 9
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};
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BitMatrix
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ITFWriter::encode(const std::wstring& contents, int width, int height) const
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{
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size_t length = contents.length();
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if (length == 0) {
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throw std::invalid_argument("Found empty contents");
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}
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if (length % 2 != 0) {
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throw std::invalid_argument("The length of the input should be even");
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}
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if (length > 80) {
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throw std::invalid_argument("Requested contents should be less than 80 digits long");
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}
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std::vector<bool> result(9 + 9 * length, false);
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int pos = WriterHelper::AppendPattern(result, 0, START_PATTERN, true);
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for (size_t i = 0; i < length; i += 2) {
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int one = contents[i] - '0';
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int two = contents[i + 1] - '0';
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if (one < 0 || one > 9 || two < 0 || two > 9) {
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throw std::invalid_argument("Contents should contain only digits: 0-9");
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}
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std::array<int, 10> encoding = {};
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for (int j = 0; j < 5; j++) {
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encoding[2 * j] = PATTERNS[one][j];
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encoding[2 * j + 1] = PATTERNS[two][j];
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}
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pos += WriterHelper::AppendPattern(result, pos, encoding, true);
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}
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WriterHelper::AppendPattern(result, pos, END_PATTERN, true);
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return WriterHelper::RenderResult(result, width, height, _sidesMargin >= 0 ? _sidesMargin : 10);
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}
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BitMatrix ITFWriter::encode(const std::string& contents, int width, int height) const
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{
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return encode(FromUtf8(contents), width, height);
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}
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} // namespace ZXing::OneD
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