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97 lines
3.4 KiB
C++
97 lines
3.4 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2021 Jon Beniston, M7RCE <jon@beniston.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 as 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 V3 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 INCLUDE_PNG_H
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#define INCLUDE_PNG_H
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#include <QByteArray>
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#include <QImage>
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#include "export.h"
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#include "util/crc.h"
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// PNG (Portable Network Graphics) utility code
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// Contains just enough functionality to support assembling APNG files (Animated PNGs)
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// from multiple PNGs (which can be created using Qt)
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class SDRBASE_API PNG {
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public:
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PNG();
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PNG(QByteArray data);
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void appendSignature();
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void appendEnd();
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void appendChunk(const char *type, QByteArray chunk);
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void append(QByteArray data);
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void appendInt(QByteArray& ba, quint32 value);
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void appendShort(QByteArray& ba, quint16 value);
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void appendInt(quint32 value);
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qint32 getInt(int index);
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qint32 crc(const char *type, const QByteArray data);
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qint32 typeStringToInt(const char *header);
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QString intToTypeString(quint32 type);
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void appendacTL(int frames, quint32 loops=0);
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void appendfcTL(quint32 seqNo, quint32 width, quint32 height, int fps, quint32 xOffset=0, quint32 yOffset=0);
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void appendfdAT(quint32 seqNo, const QByteArray& data);
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QByteArray data();
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bool checkSignature();
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int findChunk(const char *type, int startIndex=0);
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QByteArray getChunk(const char *type);
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QByteArray getChunks(const char *type);
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QList<QByteArray> getChunkData(const char *type);
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quint32 getWidth() const;
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quint32 getHeight() const;
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private:
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QByteArray m_signature = QByteArrayLiteral("\x89\x50\x4e\x47\x0d\x0a\x1a\x0a");
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QByteArray m_bytes;
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crc32 m_crc;
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quint32 m_width;
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quint32 m_height;
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};
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// Animated PNG
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class SDRBASE_API APNG {
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public:
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APNG(int frames) :
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m_frames(frames),
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m_frame(0),
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m_seqNo(0),
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m_ended(false)
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{
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m_png.appendSignature();
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}
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bool addImage(const QImage& image, int fps=5);
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bool save(const QString& fileName);
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private:
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PNG m_png;
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int m_frames; //!< Total number of frames in animation
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int m_frame; //!< Current frame number
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int m_seqNo; //!< Chunk sequence number
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bool m_ended; //!< IEND chunk has added
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};
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#endif // INCLUDE_PNG_H
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