Function adapt_for_encode 

pub fn adapt_for_encode<'a>(
    data: &'a [u8],
    descriptor: PixelDescriptor,
    width: u32,
    rows: u32,
    stride: usize,
    supported: &[PixelDescriptor],
) -> Result<Adapted<'a>, At<ConvertError>>

Negotiate format and convert pixel data for encoding.

Uses ConvertIntent::Fastest — minimizes conversion cost.

If the input already matches one of the supported formats, returns Cow::Borrowed (zero-copy). Otherwise, converts to the best match.

Arguments

• data - Raw pixel bytes, rows * stride bytes minimum.
• descriptor - Format of the input data.
• width - Pixels per row.
• rows - Number of rows.
• stride - Bytes between row starts (use width * descriptor.bytes_per_pixel() for packed).
• supported - Formats the encoder accepts.