QImage格式Format_ARGB32数据是带符号的还是无符号的int？

Question

I want to convert a QImage of format RGB888 to ARGB32 & fetch pixel data as unsigned int*.

I can do the following to convert to ARGB32

QImage new = old.convertToFormat(QImage::Format_ARGB32);

However, are the pixels stored signed or unsigned?

EDIT:

I need a pointer unsigned int* data, such that,

an unsigned int (32 bits) holds a pixel in ARGB format, which from left to right is as follows:

• the first 8 bits are for the alpha channel (and are ignored)
• the next 8 bits are for the red channel
• the next 8 bits are for the green channel
• the last 8 bits are for the blue channel

How do I do this?

Answer 1

像素存储为QRgb ，这是unsigned int的typedef。