//! Decoding and Encoding of TIFF Images

//!

//! TIFF (Tagged Image File Format) is a versatile image format that supports

//! lossless and lossy compression.

//!

//! # Related Links

//! * <https://web.archive.org/web/20210108073850/https://www.adobe.io/open/standards/TIFF.html> - The TIFF specification

mod bytecast;

pub mod decoder;

mod directory;

pub mod encoder;

mod error;

pub mod tags;

pub use self::directory::Directory;

pub use self::error::{TiffError, TiffFormatError, TiffResult, TiffUnsupportedError, UsageError};

/// An enumeration over supported color types and their bit depths

#[derive(Copy, PartialEq, Eq, Debug, Clone, Hash)]

#[non_exhaustive]

pub enum ColorType {

    /// Pixel is grayscale

    Gray(u8),

    /// Pixel contains R, G and B channels

    RGB(u8),

    /// Pixel is an index into a color palette

    Palette(u8),

    /// Pixel is grayscale with an alpha channel

    GrayA(u8),

    /// Pixel is RGB with an alpha channel

    RGBA(u8),

    /// Pixel is CMYK

    CMYK(u8),

    /// Pixel is CMYK with an alpha channel

    CMYKA(u8),

    /// Pixel is YCbCr

    YCbCr(u8),

    /// Pixel has multiple bands/channels

    Multiband { bit_depth: u8, num_samples: u16 },

}

impl ColorType {

    fn bit_depth(&self) -> u8 {

        match *self {

            ColorType::Gray(b)

            | ColorType::RGB(b)

            | ColorType::Palette(b)

            | ColorType::GrayA(b)

            | ColorType::RGBA(b)

            | ColorType::CMYK(b)

            | ColorType::CMYKA(b)

            | ColorType::YCbCr(b)

            | ColorType::Multiband { bit_depth: b, .. } => b,

        }

    }

}