How to remove alpha channel in Qt?

Question

Qt

How can one remove the alpha channel from a QPixmap (replace the transparent area with white or black)?
For example, this terminal command works as it should

find . -name "*.png" -exec convert {} -background black -flatten +matte {}.converted.png \;

Answer 1

Convert to a QImage using the toImage() method and then either use the convertToFormat() method or use the pixel(), setPixel() methods and iterate through all the pixels and blend them with the desired color and set the alpha channel to the maximum.