API is structured for simplicity over flexibility. The expectation is that common case actions are stripping alpha channel or downgrading the bit depth. Typical problem with png saving is speed of compression and output file size. Downgrading alphg and bitdepth aid in reducing that problem. Converting from lower to higher bitdepth or adding alpha before saving never makes sense.
API is structured for simplicity over flexibility. The expectation is that common case actions are stripping alpha channel or downgrading the bit depth. Typical problem with png saving is speed of compression and output file size. Downgrading alphg and bitdepth aid in reducing that problem. Converting from lower to higher bitdepth or adding alpha before saving never makes sense.