mirror of
https://github.com/pdewacht/brlaser
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69 lines
1.7 KiB
C++
69 lines
1.7 KiB
C++
// This file is part of the brlaser printer driver.
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//
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// Copyright 2013 Peter De Wachter
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//
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// brlaser 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 2 of the License, or
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// (at your option) any later version.
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//
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// brlaser 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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//
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// You should have received a copy of the GNU General Public License
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// along with brlaser. If not, see <http://www.gnu.org/licenses/>.
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#ifndef BLOCK_H
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#define BLOCK_H
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#include <assert.h>
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#include <stdio.h>
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#include <vector>
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class block {
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public:
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block(): line_bytes_(0) {
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lines_.reserve(max_lines_per_block_);
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}
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bool empty() const {
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return line_bytes_ == 0;
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}
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void add_line(std::vector<uint8_t> &&line) {
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assert(!line.empty());
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assert(line_fits(line.size()));
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line_bytes_ += line.size();
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lines_.emplace_back(line);
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}
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bool line_fits(unsigned size) {
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return lines_.size() != max_lines_per_block_
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&& line_bytes_ + size < max_block_size_;
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}
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void flush(FILE *f) {
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if (!empty()) {
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fprintf(f, "%dw%c%c",
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line_bytes_ + 2, 0,
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static_cast<int>(lines_.size()));
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for (auto &line : lines_) {
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fwrite(line.data(), 1, line.size(), f);
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}
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line_bytes_ = 0;
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lines_.clear();
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}
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}
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private:
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static const unsigned max_block_size_ = 16350;
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static const unsigned max_lines_per_block_ = 64;
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std::vector<std::vector<uint8_t>> lines_;
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int line_bytes_;
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};
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#endif // BLOCK_H
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