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use cgmath::{Vector1, Vector2, Vector3, Vector4};

/// Reinterprets a vector as an integer.
///
/// Used for sorting vectors where the actual order doesn't matter, but _an_ order needs to be made.
pub(crate) trait Asu32 {
    #[must_use]
    fn as_u32(self) -> u32;
}

/// R color: Unsigned 8-bit integer per channel
pub type ColorU8R = Vector1<u8>;
/// RG color: Unsigned 8-bit integer per channel
pub type ColorU8RG = Vector2<u8>;
/// RGB color: Unsigned 8-bit integer per channel
pub type ColorU8RGB = Vector3<u8>;
/// RGBA color: Unsigned 8-bit integer per channel
pub type ColorU8RGBA = Vector4<u8>;

impl Asu32 for ColorU8R {
    #[must_use]
    fn as_u32(self) -> u32 {
        u32::from(self.x)
    }
}

impl Asu32 for ColorU8RG {
    #[must_use]
    fn as_u32(self) -> u32 {
        u32::from(self.y) << 8 | u32::from(self.x)
    }
}

impl Asu32 for ColorU8RGB {
    #[must_use]
    fn as_u32(self) -> u32 {
        u32::from(self.z) << 16 | u32::from(self.y) << 8 | u32::from(self.x)
    }
}

impl Asu32 for ColorU8RGBA {
    #[must_use]
    fn as_u32(self) -> u32 {
        u32::from(self.w) << 24 | u32::from(self.z) << 16 | u32::from(self.y) << 8 | u32::from(self.x)
    }
}

/// R color: Unsigned 16-bit integer per channel
pub type ColorU16R = Vector1<u16>;
/// RG color: Unsigned 16-bit integer per channel
pub type ColorU16RG = Vector2<u16>;
/// RGB color: Unsigned 16-bit integer per channel
pub type ColorU16RGB = Vector3<u16>;
/// RGBA color: Unsigned 16-bit integer per channel
pub type ColorU16RGBA = Vector4<u16>;

/// R color: 32-bit float per channel
pub type ColorF32R = Vector1<f32>;
/// RG color: 32-bit float per channel
pub type ColorF32RG = Vector2<f32>;
/// RGB color: 32-bit float per channel
pub type ColorF32RGB = Vector3<f32>;
/// RGBA color: 32-bit float per channel
pub type ColorF32RGBA = Vector4<f32>;