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use crate::bindings::*;

pub const fn PackedCol_R(col: PackedCol) -> u8 {
    (col >> PACKEDCOL_R_SHIFT) as u8
}
pub const fn PackedCol_G(col: PackedCol) -> u8 {
    (col >> PACKEDCOL_G_SHIFT) as u8
}
pub const fn PackedCol_B(col: PackedCol) -> u8 {
    (col >> PACKEDCOL_B_SHIFT) as u8
}
pub const fn PackedCol_A(col: PackedCol) -> u8 {
    (col >> PACKEDCOL_A_SHIFT) as u8
}

pub const fn PackedCol_R_Bits(col: u8) -> PackedCol {
    (col as PackedCol) << PACKEDCOL_R_SHIFT
}
pub const fn PackedCol_G_Bits(col: u8) -> PackedCol {
    (col as PackedCol) << PACKEDCOL_G_SHIFT
}
pub const fn PackedCol_B_Bits(col: u8) -> PackedCol {
    (col as PackedCol) << PACKEDCOL_B_SHIFT
}
pub const fn PackedCol_A_Bits(col: u8) -> PackedCol {
    (col as PackedCol) << PACKEDCOL_A_SHIFT
}

pub const fn PackedCol_Make(r: u8, g: u8, b: u8, a: u8) -> PackedCol {
    PackedCol_R_Bits(r) | PackedCol_G_Bits(g) | PackedCol_B_Bits(b) | PackedCol_A_Bits(a)
}

pub const PACKEDCOL_WHITE: PackedCol = PackedCol_Make(255, 255, 255, 255);

#[test]
fn test_packed_col() {
    let c = PackedCol_Make(1, 2, 3, 4);

    assert_eq!(PackedCol_R(c), 1);
    assert_eq!(PackedCol_G(c), 2);
    assert_eq!(PackedCol_B(c), 3);
    assert_eq!(PackedCol_A(c), 4);
}