CODEWITHSUNDEEP
c++qtqimage
Tomáš Zato
Tomáš Zato

Reputation: 53119

Load QImage from byte array without knowing the format

QImage has the following constructor:

QImage(const QString &fileName, const char *format = nullptr);

However, I am trying to parse JPEG/PNG images that are already loaded as byte array. QImage also has other constructors, but those take already uncompressed byte array of ARGB values.

Is there a way to create QImage from unparsed byte data instead of file?

Upvotes: 2

Views: 3832

Answers (1)

perivesta
perivesta

Reputation: 4021

You can construct an empty QImage and then later use QImage::loadFromData(const QByteArray&) without specifying a format. QImage will then try to read the image header to guess the file format.

QByteArray bytes; //contains image file contents
QImage img;
bool success = img.loadFromData(bytes);

Upvotes: 8

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