59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
/*
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ptrnt - print labels on linux
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Copyright (C) 2023 Moritz Martinius
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "graphics/Monochrome.hpp"
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#include <cmath>
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#include <cstdint>
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#include <vector>
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namespace ptprnt::graphics {
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Monochrome::Monochrome(const std::vector<uint8_t>& grayscale) : mPixels(std::move(grayscale)) {}
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void Monochrome::setThreshold(uint8_t threshhold) {
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mThreshhold = threshhold;
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}
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void Monochrome::invert(bool shouldInvert) {
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mShouldInvert = shouldInvert;
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}
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std::vector<uint8_t> Monochrome::get() {
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std::vector<uint8_t> outPixels(
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(static_cast<unsigned int>((mPixels.size() / 8)) + (std::floor(mPixels.size() % 8 + 0.9))));
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unsigned int outIndex = 0;
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for (unsigned int byteNum = 0; byteNum < mPixels.size(); byteNum += 8) {
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for (unsigned int bitNo = 0; bitNo < 8; bitNo++) {
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if (mPixels[byteNum + bitNo] > mThreshhold) {
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outPixels[outIndex] |= (1 << (7 - bitNo));
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} else {
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outPixels[outIndex] &= ~(1 << (7 - bitNo));
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}
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}
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if (mShouldInvert) {
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outPixels[outIndex] = ~outPixels[outIndex];
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}
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outIndex++;
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}
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return outPixels;
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}
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} // namespace ptprnt::graphics
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