Hi All ,
I want to draw a png file to a QLabel with paintevent. Now I am using "drawPixmap(QPoint &,QPixmap &);" function. But I see that there is also "drawImage(QPoint &,QImage &);" . Which is the fastest way for drawing a .png Image?
Best Regards
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Hi All ,
I want to draw a png file to a QLabel with paintevent. Now I am using "drawPixmap(QPoint &,QPixmap &);" function. But I see that there is also "drawImage(QPoint &,QImage &);" . Which is the fastest way for drawing a .png Image?
Best Regards
1. Why not use QLabel::setPixmap() instead?
2. drawImage converts the image to a pixmap and then draws it. On Windows images and pixmaps are equivalent so the difference there is minimal, on other platforms drawImage() will be slower because of that conversion.