Load QPixmap from QByteArray in Qt?
I have a byte array with the conte开发者_如何学编程nts of an image (in png/bmp or some other format).
How can I load it into a QPixmap?
bool QPixmap::loadFromData ( const QByteArray & data, const char * format = 0, Qt::ImageConversionFlags flags = Qt::AutoColor )
Format here is string literal like "PNG"
or something similar
QPixmap p;
QByteArray pData;
// fill array with image
if(p.loadFromData(pData,"PNG"))
{
// do something with pixmap
}
You should use the folowing, where your bytes are in the imageData variable in the format specified by the last parameter:
QPixmap pixmap = QPixmap::fromImage(
QImage(
(unsigned char *) imageData,
image_width,
image_height,
QImage::Format_RGB888
)
);
Use this constructor:
QImage ( const uchar * data, int width, int height, Format format )
Here is more info. After that, you can use QPixmap.convertFromImage()
to create a pixmap.
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