Greyscale png with transparency

[Chops211]

I have an image I create that is normalized to 8-bit (0->255) stored as quint8*. I pass this to QImage and it works well. Is there anyway to set the black pixels to transparent without using libpng to set the tRNS?

[Santosh Reddy]

Convert the QImage to one of the formats which support alpha channel (example QImage::Format_ARGB32) , then set the black color pixels with alpha color.

Read about
QImage::convertToFormat();
QImage:: pixelColor();
QImage::setPixelColor();