pub fn ncchannel_set_alpha(
channel: &mut NcChannel_u32,
alpha: impl Into<NcAlpha_u32>,
) -> NcResult_i32Expand description
Sets the NcAlpha_u32 of an NcChannel_u32.
Background channels must not be set to NCALPHA_HIGHCONTRAST.
It is an error if alpha contains any bits other than NCALPHA_*.
Method: NcChannel.set_alpha()