Incorrect text rendering in GDI mode

[Admin]

Definitely yes.

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There is no problem - there is only one correct gamma value, the rest are wrong.
If you're a calculator developer and some users want 2+2=5, would you do that?
You can use font gamma tester.
Firefox show correct gamma, Cent browser not:

I'm not familiar with this parameter, but it seems that it is not necessarily a fixed value.
We may need to add an option for this.