63 lines
1.6 KiB
C++
63 lines
1.6 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 "ODWriterHelper.h"
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#include "BitMatrix.h"
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#include <algorithm>
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namespace ZXing::OneD {
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/**
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* @return a byte array of horizontal pixels (0 = white, 1 = black)
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*/
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BitMatrix
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WriterHelper::RenderResult(const std::vector<bool>& code, int width, int height, int sidesMargin)
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{
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int inputWidth = Size(code);
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// Add quiet zone on both sides.
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int fullWidth = inputWidth + sidesMargin;
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int outputWidth = std::max(width, fullWidth);
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int outputHeight = std::max(1, height);
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int multiple = outputWidth / fullWidth;
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int leftPadding = (outputWidth - (inputWidth * multiple)) / 2;
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BitMatrix result(outputWidth, outputHeight);
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for (int inputX = 0, outputX = leftPadding; inputX < inputWidth; inputX++, outputX += multiple) {
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if (code[inputX]) {
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result.setRegion(outputX, 0, multiple, outputHeight);
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}
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}
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return result;
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}
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/**
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* @param target encode black/white pattern into this array
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* @param pos position to start encoding at in {@code target}
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* @param pattern lengths of black/white runs to encode
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* @param startColor starting color - false for white, true for black
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* @return the number of elements added to target.
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*/
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int
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WriterHelper::AppendPattern(std::vector<bool>& target, int pos, const int* pattern, size_t patternCount, bool startColor)
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{
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bool color = startColor;
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int numAdded = 0;
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for (size_t i = 0; i < patternCount; ++i) {
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int s = pattern[i];
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for (int j = 0; j < s; j++) {
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target[pos++] = color;
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}
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numAdded += s;
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color = !color; // flip color after each segment
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}
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return numAdded;
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}
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} // namespace ZXing::OneD
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