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68 lines
1.7 KiB
68 lines
1.7 KiB
// 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_ = 32; |
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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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