Function webp_dev::sys::webp::webp_config_lossless_preset

pub unsafe fn webp_config_lossless_preset(
    config: *mut WebPConfig, 
    level: c_int
) -> c_int

Activate the lossless compression mode with the desired efficiency level between 0 (fastest, lowest compression) and 9 (slower, best compression).

A good default level is '6', providing a fair tradeoff between compression speed and final compressed size. This function will overwrite several fields from config: 'method', 'quality' and 'lossless'. Returns false in case of parameter error.