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Ух, сука! Оптимизация от бога!

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Igor Timofeev 2016-04-16 02:16:48 +03:00
parent 8408add75f
commit bd03c17b6b
1 changed files with 18 additions and 17 deletions
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35
lib/colorlib.lua
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@ -122,26 +122,27 @@ local palette = {
0xFF92FF, 0xFFB600, 0xFFB640, 0xFFB680, 0xFFB6BF, 0xFFB6FF, 0xFFDB00, 0xFFDB40, 0xFFDB80, 0xFFDBBF, 0xFFDBFF, 0xFFFF00, 0xFFFF40, 0xFFFF80, 0xFFFFBF, 0xFFFFFF,
}
-- Конвертер
function colorlib.convert24BitTo8Bit(hex24)
local encodedIndex = nil
local colorMatchFactor = nil
local colorMatchFactor_min = math.huge
local function searchClosestColor(startIndex, endIndex, requestedColor)
local difference = endIndex - startIndex
local centerIndex = math.floor(difference / 2 + startIndex)
local red24, green24, blue24 = colorlib.HEXtoRGB(hex24)
for colorIndex, colorPalette in ipairs(palette) do
local redPalette, greenPalette, bluePalette = colorlib.HEXtoRGB(colorPalette)
colorMatchFactor = (redPalette-red24)^2 + (greenPalette-green24)^2 + (bluePalette-blue24)^2
if (colorMatchFactor < colorMatchFactor_min) then
encodedIndex = colorIndex
colorMatchFactor_min = colorMatchFactor
if difference > 1 then
if requestedColor >= palette[centerIndex] then
return searchClosestColor(centerIndex, endIndex, requestedColor)
else
return searchClosestColor(startIndex, centerIndex, requestedColor)
end
else
if math.abs(requestedColor - palette[startIndex]) > math.abs(palette[endIndex] - requestedColor) then
return endIndex - 1
else
return startIndex - 1
end
end
end
end
return encodedIndex - 1
function colorlib.convert24BitTo8Bit(hex24)
return searchClosestColor(1, #palette, hex24)
end
function colorlib.convert8BitTo24Bit(hex8)