zune-core 0.2.1

//! Image Colorspace information and manipulation utilities.

/// All possible image colorspaces
/// Some of them aren't yet supported exist here.
#[allow(clippy::upper_case_acronyms)]
#[derive(Copy, Clone, Debug, Eq, PartialEq)]
#[non_exhaustive]
pub enum ColorSpace
{
    RGB,
    RGBA,
    YCbCr,
    Luma,
    LumaA,
    YCCK,
    CMYK,
    Unknown
}
impl ColorSpace
{
    pub const fn num_components(&self) -> usize
    {
        match self
        {
            Self::RGB | Self::YCbCr => 3,
            Self::RGBA | Self::YCCK | Self::CMYK => 4,
            Self::Luma => 1,
            Self::LumaA => 2,
            Self::Unknown => 0
        }
    }

    pub const fn has_alpha(&self) -> bool
    {
        matches!(self, Self::RGBA | Self::LumaA)
    }

    pub const fn is_grayscale(&self) -> bool
    {
        matches!(self, Self::LumaA | Self::Luma)
    }
}

/// Encapsulates all colorspaces supported by
/// the library
pub static ALL_COLORSPACES: [ColorSpace; 6] = [
    ColorSpace::RGB,
    ColorSpace::RGBA,
    ColorSpace::LumaA,
    ColorSpace::Luma,
    ColorSpace::CMYK,
    ColorSpace::YCbCr
];

/// Color characteristics
///
/// Gives more information about values in a certain
/// colorspace
#[allow(non_camel_case_types)]
#[derive(Copy, Clone, Debug, PartialEq)]
pub enum ColorCharacteristics
{
    /// Normal default gamma setting
    /// The float contains gamma present
    ///
    /// The default gamma value is 2.2 but for
    /// decoders that allow specifying gamma values,e.g PNG,
    /// the gamma value becomes the specified value by the decoder
    sRGB,
    /// Linear transfer characteristics
    /// The image is in linear colorspace
    Linear
}