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IFF: add support for uncompressed ACBM type

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This commit is contained in:
Mirco Miranda
2025-07-24 07:37:58 +02:00
parent 16b669d63d
commit fd864e6f55
5 changed files with 119 additions and 7 deletions
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37
src/imageformats/chunks_p.h
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@ -44,6 +44,7 @@
#define PRO8_CHUNK QByteArray("PRO8")
// FORM ILBM IFF
#define ABIT_CHUNK QByteArray("ABIT")
#define BMHD_CHUNK QByteArray("BMHD")
#define BODY_CHUNK QByteArray("BODY")
#define CAMG_CHUNK QByteArray("CAMG")
@ -70,6 +71,7 @@
#define VERS_CHUNK QByteArray("VERS")
#define XMP0_CHUNK QByteArray("XMP0") // https://aminet.net/package/docs/misc/IFF-metadata
#define ACBM_FORM_TYPE QByteArray("ACBM")
#define ILBM_FORM_TYPE QByteArray("ILBM")
#define PBM__FORM_TYPE QByteArray("PBM ")
#define CIMG_FOR4_TYPE QByteArray("CIMG")
@ -573,20 +575,21 @@ public:
* \return The scanline as requested for QImage.
* \warning Call resetStrideRead() once before this one.
*/
QByteArray strideRead(QIODevice *d, const BMHDChunk *header, const CAMGChunk *camg = nullptr, const CMAPChunk *cmap = nullptr, bool isPbm = false) const;
virtual QByteArray strideRead(QIODevice *d, const BMHDChunk *header, const CAMGChunk *camg = nullptr, const CMAPChunk *cmap = nullptr, bool isPbm = false) const;
/*!
* \brief resetStrideRead
* Reset the stride read set the position at the beginning of the data and reset all buffers.
* \param d The device
* \param d The device.
* \param header The BMHDChunk chunk (mandatory)
* \param camg The CAMG chunk (optional)
* \return True on success, otherwise false.
* \sa strideRead
* \note Must be called once before strideRead().
*/
bool resetStrideRead(QIODevice *d) const;
virtual bool resetStrideRead(QIODevice *d) const;
private:
protected:
/*!
* \brief strideSize
* \param isPbm Set true if the image is PBM.
@ -596,9 +599,35 @@ private:
QByteArray deinterleave(const QByteArray &planes, const BMHDChunk *header, const CAMGChunk *camg = nullptr, const CMAPChunk *cmap = nullptr, bool isPbm = false) const;
private:
mutable QByteArray _readBuffer;
};
/*!
* \brief The ABITChunk class
*/
class ABITChunk : public BODYChunk
{
public:
virtual ~ABITChunk() override;
ABITChunk();
ABITChunk(const ABITChunk& other) = default;
ABITChunk& operator =(const ABITChunk& other) = default;
virtual bool isValid() const override;
CHUNKID_DEFINE(ABIT_CHUNK)
virtual QByteArray strideRead(QIODevice *d, const BMHDChunk *header, const CAMGChunk *camg = nullptr, const CMAPChunk *cmap = nullptr, bool isPbm = false) const override;
virtual bool resetStrideRead(QIODevice *d) const override;
private:
mutable qint32 _y;
};
/*!
* \brief The FORMChunk class
*/