QImage loadFromData solid red
Solved
General and Desktop
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Hi,
i want to open a image file and if it cannot be open a solid 1x1 pixel red image should used instead.
Here is my code, but my loadFromData does not work. Can someone explain to me how it works??QImage img; if (!img.load(path)) img.loadFromData(QByteArray(1, 255));
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That's not correct.
loadFromData
does not create images from raw bytes. All it does is it takes a stream of data from memory instead of from file. It still needs to be in proper format e.g. jpeg, so have a header, data blocks etc.
If all you want is a red pixel you can do it like this:QImage img; if (!img.load(path)) { img = QImage(1, 1, QImage::Format_ARGB32); img.fill(Qt::red); }