mirror of
https://github.com/riuson/lcd-image-converter.git
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64 lines
2.0 KiB
C++
64 lines
2.0 KiB
C++
/*
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* LCD Image Converter. Converts images and fonts for embedded applications.
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* Copyright (C) 2012 riuson
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* mailto: riuson@gmail.com
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*
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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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*
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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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*
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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 <http://www.gnu.org/licenses/
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*/
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#ifndef RLE_H
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#define RLE_H
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#include "conversion_options.h"
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#include <QObject>
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// Run-length encoding algorithm
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// http://en.wikipedia.org/wiki/Run-length_encoding
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template <class T> class QVector;
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template <class T> class QQueue;
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namespace Utils
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{
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namespace Compression
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{
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class RleSequence;
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class RleCompressor : public QObject
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{
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Q_OBJECT
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public:
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explicit RleCompressor(QObject* parent = 0);
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virtual ~RleCompressor() {}
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void compress(QVector<quint32>* input, Parsing::Conversion::Options::DataBlockSize dataSize, QVector<quint32>* output,
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quint32 minimumOfEquals = 2);
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private:
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void collectSequences(const QVector<quint32>* input, QVector<RleSequence*>* sequences);
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void combineSequences(const QVector<RleSequence*>* inputSequences, quint32 minimumOfEquals,
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QVector<RleSequence*>* outputSequences);
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quint32 getMaxSize(Parsing::Conversion::Options::DataBlockSize dataSize);
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void flushSequence(const RleSequence* sequence, Parsing::Conversion::Options::DataBlockSize dataSize,
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QVector<quint32>* output);
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void flushSequencePart(const RleSequence* sequence, quint32 start, quint32 length, QVector<quint32>* output);
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};
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} // namespace Compression
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} // namespace Utils
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#endif // RLE_H
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