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Decode Atari ST VDAT chunks

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This commit is contained in:
Mirco Miranda
2025-09-10 14:20:47 +02:00
parent 99e4223393
commit 2410e45614
2 changed files with 179 additions and 2 deletions
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32
src/imageformats/chunks_p.h
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@@ -84,6 +84,7 @@ Q_DECLARE_LOGGING_CATEGORY(LOG_IFFPLUGIN)
#define FVER_CHUNK QByteArray("FVER")
#define HIST_CHUNK QByteArray("HIST")
#define NAME_CHUNK QByteArray("NAME")
#define VDAT_CHUNK QByteArray("VDAT")
#define VERS_CHUNK QByteArray("VERS")
#define XMP0_CHUNK QByteArray("XMP0") // https://aminet.net/package/docs/misc/IFF-metadata
@@ -431,7 +432,8 @@ public:
enum Compression {
Uncompressed = 0, /**< Image data are uncompressed. */
Rle = 1, /**< Image data are RLE compressed. */
RgbN8 = 4 /**< RGB8/RGBN compresson. */
Vdat = 2, /**< Image data are VDAT compressed. */
RgbN8 = 4 /**< Image data are RGB8/RGBN compressed. */
};
enum Masking {
None = 0, /**< Designates an opaque rectangular image. */
@@ -815,6 +817,8 @@ protected:
QByteArray rgbN(const QByteArray &planes, qint32 y, const BMHDChunk *header, const CAMGChunk *camg = nullptr, const CMAPChunk *cmap = nullptr, const IPALChunk *ipal = nullptr) const;
virtual bool innerReadStructure(QIODevice *d) override;
private:
mutable QByteArray _readBuffer;
};
@@ -1369,6 +1373,32 @@ protected:
virtual bool innerReadStructure(QIODevice *d) override;
};
/*!
* \brief The VDATChunk class
*/
class VDATChunk : public IFFChunk
{
public:
virtual ~VDATChunk() override;
VDATChunk();
VDATChunk(const VDATChunk& other) = default;
VDATChunk& operator =(const VDATChunk& other) = default;
virtual bool isValid() const override;
CHUNKID_DEFINE(VDAT_CHUNK)
const QByteArray &uncompressedData(const BMHDChunk *header) const;
protected:
virtual bool innerReadStructure(QIODevice *d) override;
private:
mutable QByteArray uncompressed;
};
/*!
* \brief The VERSChunk class
*/