QImage and its const bits() const method

Qt's QImage has two methods:

uchar* QImage::bits();
const uchar* QImage::bits() const;

But how to 开发者_运维技巧call a second one? Calling

const uchar* p = image.bits();

Will call a non-const version O_O.

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const QImage* im = ℑ
const uchar* p = im->bits();

will use the const version.