In the Image Formats part of QImage doc says
"
The allGray() and isGrayscale() functions tell whether a color image can safely
be converted to a grayscale image.
"
but in the doc of there 2 functions indicate they're used to decide whether an
image is grayscale image ,not mentioned they could be used to tell whether a
color image can safely be converted to a grayscale image.
what about your opinion ?
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