Not work QImage::loadFromData

[Mihaill]

Hi!
Not work QImage::loadFromData and QPixmap::loadFromData.
For example I read image and getting QByteArrat set for QImage, but it's not work.
How I can fix this?
I use qt 6.3 and ubuntu 20.04

   QPixmap pixmap;
    QFile file("/home/owner/Загрузки/image_2022-02-04_15-52-48.png");
    file.open(QIODevice::ReadOnly | QIODevice::Text);
    QByteArray arr = file.readAll();
    file.close();
    QImage image;
    QImage image2("/home/owner/Загрузки/image_2022-02-04_15-52-48.png");
    image.loadFromData(arr);
    pixmap.loadFromData( arr, "PNG");
    qDebug()<<1111<<image.width()<<image.height();
    qDebug()<<222<<pixmap.width()<<pixmap.height();
    qDebug()<<333<<arr.size()<<image2.format();

image2 have normal size and have format QImage::Format_ARGB32

[JonB]

@Mihaill said in Not work QImage::loadFromData:

file.open(QIODevice::ReadOnly | QIODevice::Text);

It may not matter under Linux, but for sure you do not want QIODevice::Text here. First start by removing that.

[Mihaill]

It is work!

[JonB]

@Mihaill
LOL, I did not expect that to actually work, just that it was wrong, .png is certainly not a text file.

I suspect that even under Linux QIODevice::Text will translate precisely the sequence \r\n to \n? So if in your .png there happens to be bytes 0x0d 0x0a somewhere that would get changed to just 0x0a, which I guess was the case.