--
-- hud_fs: Render formspecs into HUDs
--
-- This is the fallback parser for ColorStrings when
-- minetest.colorspec_to_colorstring doesn't exist.
--

-- From https://www.w3.org/TR/css-color-3/#svg-color
local lookup_table = {
    aliceblue            = 0xf0f8ff,
    antiquewhite         = 0xfaebd7,
    aqua                 = 0x00ffff,
    aquamarine           = 0x7fffd4,
    azure                = 0xf0ffff,
    beige                = 0xf5f5dc,
    bisque               = 0xffe4c4,
    black                = 0x000000,
    blanchedalmond       = 0xffebcd,
    blue                 = 0x0000ff,
    blueviolet           = 0x8a2be2,
    brown                = 0xa52a2a,
    burlywood            = 0xdeb887,
    cadetblue            = 0x5f9ea0,
    chartreuse           = 0x7fff00,
    chocolate            = 0xd2691e,
    coral                = 0xff7f50,
    cornflowerblue       = 0x6495ed,
    cornsilk             = 0xfff8dc,
    crimson              = 0xdc143c,
    cyan                 = 0x00ffff,
    darkblue             = 0x00008b,
    darkcyan             = 0x008b8b,
    darkgoldenrod        = 0xb8860b,
    darkgray             = 0xa9a9a9,
    darkgreen            = 0x006400,
    darkgrey             = 0xa9a9a9,
    darkkhaki            = 0xbdb76b,
    darkmagenta          = 0x8b008b,
    darkolivegreen       = 0x556b2f,
    darkorange           = 0xff8c00,
    darkorchid           = 0x9932cc,
    darkred              = 0x8b0000,
    darksalmon           = 0xe9967a,
    darkseagreen         = 0x8fbc8f,
    darkslateblue        = 0x483d8b,
    darkslategray        = 0x2f4f4f,
    darkslategrey        = 0x2f4f4f,
    darkturquoise        = 0x00ced1,
    darkviolet           = 0x9400d3,
    deeppink             = 0xff1493,
    deepskyblue          = 0x00bfff,
    dimgray              = 0x696969,
    dimgrey              = 0x696969,
    dodgerblue           = 0x1e90ff,
    firebrick            = 0xb22222,
    floralwhite          = 0xfffaf0,
    forestgreen          = 0x228b22,
    fuchsia              = 0xff00ff,
    gainsboro            = 0xdcdcdc,
    ghostwhite           = 0xf8f8ff,
    gold                 = 0xffd700,
    goldenrod            = 0xdaa520,
    gray                 = 0x808080,
    green                = 0x008000,
    greenyellow          = 0xadff2f,
    grey                 = 0x808080,
    honeydew             = 0xf0fff0,
    hotpink              = 0xff69b4,
    indianred            = 0xcd5c5c,
    indigo               = 0x4b0082,
    ivory                = 0xfffff0,
    khaki                = 0xf0e68c,
    lavender             = 0xe6e6fa,
    lavenderblush        = 0xfff0f5,
    lawngreen            = 0x7cfc00,
    lemonchiffon         = 0xfffacd,
    lightblue            = 0xadd8e6,
    lightcoral           = 0xf08080,
    lightcyan            = 0xe0ffff,
    lightgoldenrodyellow = 0xfafad2,
    lightgray            = 0xd3d3d3,
    lightgreen           = 0x90ee90,
    lightgrey            = 0xd3d3d3,
    lightpink            = 0xffb6c1,
    lightsalmon          = 0xffa07a,
    lightseagreen        = 0x20b2aa,
    lightskyblue         = 0x87cefa,
    lightslategray       = 0x778899,
    lightslategrey       = 0x778899,
    lightsteelblue       = 0xb0c4de,
    lightyellow          = 0xffffe0,
    lime                 = 0x00ff00,
    limegreen            = 0x32cd32,
    linen                = 0xfaf0e6,
    magenta              = 0xff00ff,
    maroon               = 0x800000,
    mediumaquamarine     = 0x66cdaa,
    mediumblue           = 0x0000cd,
    mediumorchid         = 0xba55d3,
    mediumpurple         = 0x9370db,
    mediumseagreen       = 0x3cb371,
    mediumslateblue      = 0x7b68ee,
    mediumspringgreen    = 0x00fa9a,
    mediumturquoise      = 0x48d1cc,
    mediumvioletred      = 0xc71585,
    midnightblue         = 0x191970,
    mintcream            = 0xf5fffa,
    mistyrose            = 0xffe4e1,
    moccasin             = 0xffe4b5,
    navajowhite          = 0xffdead,
    navy                 = 0x000080,
    oldlace              = 0xfdf5e6,
    olive                = 0x808000,
    olivedrab            = 0x6b8e23,
    orange               = 0xffa500,
    orangered            = 0xff4500,
    orchid               = 0xda70d6,
    palegoldenrod        = 0xeee8aa,
    palegreen            = 0x98fb98,
    paleturquoise        = 0xafeeee,
    palevioletred        = 0xdb7093,
    papayawhip           = 0xffefd5,
    peachpuff            = 0xffdab9,
    peru                 = 0xcd853f,
    pink                 = 0xffc0cb,
    plum                 = 0xdda0dd,
    powderblue           = 0xb0e0e6,
    purple               = 0x800080,
    rebeccapurple        = 0x663399,
    red                  = 0xff0000,
    rosybrown            = 0xbc8f8f,
    royalblue            = 0x4169e1,
    saddlebrown          = 0x8b4513,
    salmon               = 0xfa8072,
    sandybrown           = 0xf4a460,
    seagreen             = 0x2e8b57,
    seashell             = 0xfff5ee,
    sienna               = 0xa0522d,
    silver               = 0xc0c0c0,
    skyblue              = 0x87ceeb,
    slateblue            = 0x6a5acd,
    slategray            = 0x708090,
    slategrey            = 0x708090,
    snow                 = 0xfffafa,
    springgreen          = 0x00ff7f,
    steelblue            = 0x4682b4,
    tan                  = 0xd2b48c,
    teal                 = 0x008080,
    thistle              = 0xd8bfd8,
    tomato               = 0xff6347,
    turquoise            = 0x40e0d0,
    violet               = 0xee82ee,
    wheat                = 0xf5deb3,
    white                = 0xffffff,
    whitesmoke           = 0xf5f5f5,
    yellow               = 0xffff00,
    yellowgreen          = 0x9acd32,
}

return function(col)
    if col:byte(1) == 35 then
        -- Convert #123 to #112233
        if #col < 7 then
            col = col:gsub("[^#]", "%1%1")
        end

        -- Remove the alpha channel and convert to a number
        return tonumber(col:sub(2, 7), 16)
    end

    -- Try the lookup table
    return lookup_table[col:lower():match('^[^#]+')]
end