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MicroExif: search for the TIFF signature

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Mirco Miranda 2025-03-03 09:17:56 +01:00
parent 7742537f8c
commit 25cc8bc262
3 changed files with 25 additions and 8 deletions
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2
src/imageformats/heif.cpp
View File

@ -953,7 +953,7 @@ bool HEIFHandler::ensureDecoder()
if (isXmp) {
m_current_image.setText(QStringLiteral(META_KEY_XMP_ADOBE), QString::fromUtf8(ba));
} else if (isExif) {
auto exif = MicroExif::fromByteArray(ba.mid(4));
auto exif = MicroExif::fromByteArray(ba, true);
if (!exif.isEmpty()) {
exif.updateImageResolution(m_current_image);
exif.updateImageMetadata(m_current_image);

20
src/imageformats/microexif.cpp
View File

@ -1166,18 +1166,30 @@ void MicroExif::updateImageResolution(QImage &targetImage)
targetImage.setDotsPerMeterY(qRound(verticalResolution() / 25.4 * 1000));
}
MicroExif MicroExif::fromByteArray(const QByteArray &ba)
MicroExif MicroExif::fromByteArray(const QByteArray &ba, bool searchHeader)
{
auto ba0(ba);
if (searchHeader) {
auto idxLE = ba0.indexOf(QByteArray("II"));
auto idxBE = ba0.indexOf(QByteArray("MM"));
auto idx = -1;
if (idxLE > -1 && idxBE > -1)
idx = std::min(idxLE, idxBE);
else
idx = idxLE > -1 ? idxLE : idxBE;
if(idx > 0)
ba0 = ba0.mid(idx);
}
QBuffer buf;
buf.setData(ba);
buf.setData(ba0);
return fromDevice(&buf);
}
MicroExif MicroExif::fromRawData(const char *data, size_t size)
MicroExif MicroExif::fromRawData(const char *data, size_t size, bool searchHeader)
{
if (data == nullptr || size == 0)
return {};
return fromByteArray(QByteArray::fromRawData(data, size));
return fromByteArray(QByteArray::fromRawData(data, size), searchHeader);
}
MicroExif MicroExif::fromDevice(QIODevice *device)

11
src/imageformats/microexif_p.h
View File

@ -332,18 +332,23 @@ public:
/*!
* \brief fromByteArray
* Creates the class from RAW EXIF data.
* \param ba Raw data containing EXIF ​​data.
* \param searchHeader If true, the EXIF ​​header is searched within the data. If false, the data must begin with the EXIF ​​header.
* \return The created class (empty on error).
* \sa isEmpty
*/
static MicroExif fromByteArray(const QByteArray &ba);
static MicroExif fromByteArray(const QByteArray &ba, bool searchHeader = false);
/*!
* \brief fromRawData
* Creates the class from RAW EXIF data.
* \param data Raw data containing EXIF ​​data.
* \param size The size of \a data.
* \param searchHeader If true, the EXIF ​​header is searched within the data. If false, the data must begin with the EXIF ​​header.
* \return The created class (empty on error).
* \sa isEmpty
* \sa isEmpty, fromByteArray
*/
static MicroExif fromRawData(const char *data, size_t size);
static MicroExif fromRawData(const char *data, size_t size, bool searchHeader = false);
/*!
* \brief fromDevice