Home Contents | # gcx:light | Graphics | Core4 Lua Commands

## SYNOPSIS

1. value = gcx:light([value])
2. value = gcx:contrast([value])

## DESCRIPTION

Controls parameters of the display hardware. value is a value in the range from 0···255.

If the value is nil or absent, the value is not changed. Use this to read the current value.

gcx:light() controls the backlight intensity, 0 is off, 255 is maximum.

gcx:contrast() controls the display contrast. Note that TFT displays do not support a contrast setting.

## RETURN VALUE

On success, returns the configured value. On failure, returns three values: nil, a string describing the error (The result of the C library call strerror() on the errno code) and the errno number from the standard C library.