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The Android Official documentation defines SCREEN_BRIGHTNESS range as 0-255. How can I map it with cd/m2 (candela/meter square) ?

I need to make between 200 cd/m2 to 400 cd/m2 with 50 as interval.

Abhiroop Nandi Ray
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You cannot map it directly. You will need to have a graph b/w CALDAC parameter (calibration dacs) and luminance (candela/meter squares) also you would need a method to actually check luminance programatically later. You will have to calculate the caldac parameters for atleast some thresholds - like after each 50 cd/m2.

This all , ofcourse is possible only if you have access to the display firmware and the hardware.

Rajat Gupta
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