mirror of
https://github.com/appgurueu/modlib.git
synced 2024-08-20 13:24:11 +02:00
322 lines
7.3 KiB
Lua
322 lines
7.3 KiB
Lua
-- Localize globals
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local assert, error, math, minetest, setmetatable, tonumber, type = assert, error, math, minetest, setmetatable, tonumber, type
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local floor = math.floor
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-- Set environment
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local _ENV = ...
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setfenv(1, _ENV)
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-- As in src/util/string.cpp
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named_colors = {
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aliceblue = 0xf0f8ff,
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antiquewhite = 0xfaebd7,
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aqua = 0x00ffff,
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aquamarine = 0x7fffd4,
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azure = 0xf0ffff,
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beige = 0xf5f5dc,
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bisque = 0xffe4c4,
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black = 0x000000,
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blanchedalmond = 0xffebcd,
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blue = 0x0000ff,
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blueviolet = 0x8a2be2,
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brown = 0xa52a2a,
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burlywood = 0xdeb887,
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cadetblue = 0x5f9ea0,
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chartreuse = 0x7fff00,
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chocolate = 0xd2691e,
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coral = 0xff7f50,
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cornflowerblue = 0x6495ed,
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cornsilk = 0xfff8dc,
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crimson = 0xdc143c,
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cyan = 0x00ffff,
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darkblue = 0x00008b,
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darkcyan = 0x008b8b,
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darkgoldenrod = 0xb8860b,
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darkgray = 0xa9a9a9,
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darkgreen = 0x006400,
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darkgrey = 0xa9a9a9,
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darkkhaki = 0xbdb76b,
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darkmagenta = 0x8b008b,
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darkolivegreen = 0x556b2f,
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darkorange = 0xff8c00,
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darkorchid = 0x9932cc,
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darkred = 0x8b0000,
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darksalmon = 0xe9967a,
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darkseagreen = 0x8fbc8f,
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darkslateblue = 0x483d8b,
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darkslategray = 0x2f4f4f,
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darkslategrey = 0x2f4f4f,
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darkturquoise = 0x00ced1,
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darkviolet = 0x9400d3,
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deeppink = 0xff1493,
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deepskyblue = 0x00bfff,
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dimgray = 0x696969,
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dimgrey = 0x696969,
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dodgerblue = 0x1e90ff,
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firebrick = 0xb22222,
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floralwhite = 0xfffaf0,
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forestgreen = 0x228b22,
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fuchsia = 0xff00ff,
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gainsboro = 0xdcdcdc,
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ghostwhite = 0xf8f8ff,
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gold = 0xffd700,
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goldenrod = 0xdaa520,
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gray = 0x808080,
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green = 0x008000,
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greenyellow = 0xadff2f,
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grey = 0x808080,
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honeydew = 0xf0fff0,
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hotpink = 0xff69b4,
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indianred = 0xcd5c5c,
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indigo = 0x4b0082,
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ivory = 0xfffff0,
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khaki = 0xf0e68c,
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lavender = 0xe6e6fa,
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lavenderblush = 0xfff0f5,
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lawngreen = 0x7cfc00,
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lemonchiffon = 0xfffacd,
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lightblue = 0xadd8e6,
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lightcoral = 0xf08080,
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lightcyan = 0xe0ffff,
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lightgoldenrodyellow = 0xfafad2,
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lightgray = 0xd3d3d3,
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lightgreen = 0x90ee90,
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lightgrey = 0xd3d3d3,
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lightpink = 0xffb6c1,
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lightsalmon = 0xffa07a,
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lightseagreen = 0x20b2aa,
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lightskyblue = 0x87cefa,
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lightslategray = 0x778899,
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lightslategrey = 0x778899,
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lightsteelblue = 0xb0c4de,
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lightyellow = 0xffffe0,
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lime = 0x00ff00,
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limegreen = 0x32cd32,
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linen = 0xfaf0e6,
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magenta = 0xff00ff,
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maroon = 0x800000,
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mediumaquamarine = 0x66cdaa,
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mediumblue = 0x0000cd,
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mediumorchid = 0xba55d3,
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mediumpurple = 0x9370db,
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mediumseagreen = 0x3cb371,
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mediumslateblue = 0x7b68ee,
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mediumspringgreen = 0x00fa9a,
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mediumturquoise = 0x48d1cc,
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mediumvioletred = 0xc71585,
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midnightblue = 0x191970,
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mintcream = 0xf5fffa,
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mistyrose = 0xffe4e1,
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moccasin = 0xffe4b5,
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navajowhite = 0xffdead,
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navy = 0x000080,
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oldlace = 0xfdf5e6,
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olive = 0x808000,
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olivedrab = 0x6b8e23,
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orange = 0xffa500,
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orangered = 0xff4500,
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orchid = 0xda70d6,
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palegoldenrod = 0xeee8aa,
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palegreen = 0x98fb98,
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paleturquoise = 0xafeeee,
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palevioletred = 0xdb7093,
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papayawhip = 0xffefd5,
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peachpuff = 0xffdab9,
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peru = 0xcd853f,
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pink = 0xffc0cb,
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plum = 0xdda0dd,
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powderblue = 0xb0e0e6,
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purple = 0x800080,
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red = 0xff0000,
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rosybrown = 0xbc8f8f,
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royalblue = 0x4169e1,
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saddlebrown = 0x8b4513,
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salmon = 0xfa8072,
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sandybrown = 0xf4a460,
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seagreen = 0x2e8b57,
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seashell = 0xfff5ee,
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sienna = 0xa0522d,
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silver = 0xc0c0c0,
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skyblue = 0x87ceeb,
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slateblue = 0x6a5acd,
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slategray = 0x708090,
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slategrey = 0x708090,
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snow = 0xfffafa,
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springgreen = 0x00ff7f,
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steelblue = 0x4682b4,
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tan = 0xd2b48c,
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teal = 0x008080,
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thistle = 0xd8bfd8,
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tomato = 0xff6347,
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turquoise = 0x40e0d0,
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violet = 0xee82ee,
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wheat = 0xf5deb3,
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white = 0xffffff,
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whitesmoke = 0xf5f5f5,
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yellow = 0xffff00,
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yellowgreen = 0x9acd32
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}
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colorspec = {}
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local metatable = {__index = colorspec}
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colorspec.metatable = metatable
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function colorspec.new(table)
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return setmetatable({
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r = assert(table.r),
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g = assert(table.g),
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b = assert(table.b),
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a = table.a or 255
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}, metatable)
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end
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colorspec.from_table = colorspec.new
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local c_comp = { "r", "g", "g", "b", "b", "r" }
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local x_comp = { "g", "r", "b", "g", "r", "b" }
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function colorspec.from_hsv(
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-- 0 (inclusive) to 1 (exclusive)
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hue,
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-- 0 to 1 (both inclusive)
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saturation,
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-- 0 to 1 (both inclusive)
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value
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)
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hue = hue * 6
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local chroma = saturation * value
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local m = value - chroma
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local color = {r = m, g = m, b = m}
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local idx = 1 + floor(hue)
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color[c_comp[idx]] = color[c_comp[idx]] + chroma
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local x = chroma * (1 - math.abs(hue % 2 - 1))
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color[x_comp[idx]] = color[x_comp[idx]] + x
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color.r = floor(color.r * 255 + 0.5)
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color.g = floor(color.g * 255 + 0.5)
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color.b = floor(color.b * 255 + 0.5)
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return colorspec.from_table(color)
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end
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function colorspec.from_string(string)
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local hex = "#([A-Fa-f%d]+)"
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local number, alpha = named_colors[string], 0xFF
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if not number then
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local name, alpha_text = string:match("^([a-z]+)" .. hex .. "$")
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if name then
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if alpha_text:len() ~= 2 then
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return
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end
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number = named_colors[name]
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if not number then
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return
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end
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alpha = tonumber(alpha_text, 16)
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end
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end
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if number then
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return colorspec.from_number_rgba(number * 0x100 + alpha)
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end
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local hex_text = string:match("^" .. hex .. "$")
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if not hex_text then
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return
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end
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local len, num = hex_text:len(), tonumber(hex_text, 16)
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if len == 8 then
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return colorspec.from_number_rgba(num)
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end
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if len == 6 then
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return colorspec.from_number_rgba(num * 0x100 + 0xFF)
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end
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if len == 4 then
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return colorspec.from_table{
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a = (num % 16) * 17,
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b = (floor(num / 16) % 16) * 17,
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g = (floor(num / (16 ^ 2)) % 16) * 17,
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r = (floor(num / (16 ^ 3)) % 16) * 17
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}
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end
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if len == 3 then
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return colorspec.from_table{
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b = (num % 16) * 17,
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g = (floor(num / 16) % 16) * 17,
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r = (floor(num / (16 ^ 2)) % 16) * 17
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}
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end
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end
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colorspec.from_text = colorspec.from_string
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function colorspec.from_number_rgba(number)
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return colorspec.from_table{
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a = number % 0x100,
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b = floor(number / 0x100) % 0x100,
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g = floor(number / 0x10000) % 0x100,
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r = floor(number / 0x1000000)
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}
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end
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function colorspec.from_number_rgb(number)
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return colorspec.from_table{
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a = 0xFF,
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b = number % 0x100,
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g = floor(number / 0x100) % 0x100,
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r = floor(number / 0x10000)
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}
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end
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function colorspec.from_number(number)
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return colorspec.from_table{
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b = number % 0x100,
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g = floor(number / 0x100) % 0x100,
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r = floor(number / 0x10000) % 0x100,
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a = floor(number / 0x1000000)
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}
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end
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function colorspec.from_any(value)
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local type = type(value)
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if type == "table" then
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return colorspec.from_table(value)
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end
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if type == "string" then
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return colorspec.from_string(value)
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end
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if type == "number" then
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return colorspec.from_number(value)
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end
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error("Unsupported type " .. type)
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end
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function colorspec:to_table()
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return self
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end
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--> hex string, omits alpha if possible (if opaque)
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function colorspec:to_string()
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if self.a == 255 then
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return ("#%02X%02X%02X"):format(self.r, self.g, self.b)
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end
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return ("#%02X%02X%02X%02X"):format(self.r, self.g, self.b, self.a)
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end
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metatable.__tostring = colorspec.to_string
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function colorspec:to_number_rgba()
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return self.r * 0x1000000 + self.g * 0x10000 + self.b * 0x100 + self.a
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end
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function colorspec:to_number_rgb()
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return self.r * 0x10000 + self.g * 0x100 + self.b
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end
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function colorspec:to_number()
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return self.a * 0x1000000 + self.r * 0x10000 + self.g * 0x100 + self.b
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end
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colorspec_to_colorstring = minetest.colorspec_to_colorstring or function(spec)
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local color = colorspec.from_any(spec)
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if not color then
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return nil
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end
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return color:to_string()
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end
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