playe.lua

local image = require("image")
--local buffer = require("doubleBuffering")
local bit32 = require("bit32")

local args={...}

local constants = {
	OCIFSignature = "OCIF",
	OCIF2Elements = {
		alphaStart = "A",
		symbolStart = "S",
		backgroundStart = "B",
		foregroundStart = "F",
	},
	elementCount = 4,
	byteSize = 8,
	nullChar = 0,
	rawImageLoadStep = 19,
	compressedFileFormat = ".pic",
	pngFileFormat = ".png",
}

local palette = {
  0x000000, 0x000040, 0x000080, 0x0000BF, 0x0000FF, 0x002400, 0x002440, 0x002480, 0x0024BF, 0x0024FF, 0x004900, 0x004940, 0x004980, 0x0049BF, 0x0049FF, 0x006D00,
  0x006D40, 0x006D80, 0x006DBF, 0x006DFF, 0x009200, 0x009240, 0x009280, 0x0092BF, 0x0092FF, 0x00B600, 0x00B640, 0x00B680, 0x00B6BF, 0x00B6FF, 0x00DB00, 0x00DB40,
  0x00DB80, 0x00DBBF, 0x00DBFF, 0x00FF00, 0x00FF40, 0x00FF80, 0x00FFBF, 0x00FFFF, 0x0F0F0F, 0x1E1E1E, 0x2D2D2D, 0x330000, 0x330040, 0x330080, 0x3300BF, 0x3300FF,
  0x332400, 0x332440, 0x332480, 0x3324BF, 0x3324FF, 0x334900, 0x334940, 0x334980, 0x3349BF, 0x3349FF, 0x336D00, 0x336D40, 0x336D80, 0x336DBF, 0x336DFF, 0x339200,
  0x339240, 0x339280, 0x3392BF, 0x3392FF, 0x33B600, 0x33B640, 0x33B680, 0x33B6BF, 0x33B6FF, 0x33DB00, 0x33DB40, 0x33DB80, 0x33DBBF, 0x33DBFF, 0x33FF00, 0x33FF40,
  0x33FF80, 0x33FFBF, 0x33FFFF, 0x3C3C3C, 0x4B4B4B, 0x5A5A5A, 0x660000, 0x660040, 0x660080, 0x6600BF, 0x6600FF, 0x662400, 0x662440, 0x662480, 0x6624BF, 0x6624FF,
  0x664900, 0x664940, 0x664980, 0x6649BF, 0x6649FF, 0x666D00, 0x666D40, 0x666D80, 0x666DBF, 0x666DFF, 0x669200, 0x669240, 0x669280, 0x6692BF, 0x6692FF, 0x66B600,
  0x66B640, 0x66B680, 0x66B6BF, 0x66B6FF, 0x66DB00, 0x66DB40, 0x66DB80, 0x66DBBF, 0x66DBFF, 0x66FF00, 0x66FF40, 0x66FF80, 0x66FFBF, 0x66FFFF, 0x696969, 0x787878,
  0x878787, 0x969696, 0x990000, 0x990040, 0x990080, 0x9900BF, 0x9900FF, 0x992400, 0x992440, 0x992480, 0x9924BF, 0x9924FF, 0x994900, 0x994940, 0x994980, 0x9949BF,
  0x9949FF, 0x996D00, 0x996D40, 0x996D80, 0x996DBF, 0x996DFF, 0x999200, 0x999240, 0x999280, 0x9992BF, 0x9992FF, 0x99B600, 0x99B640, 0x99B680, 0x99B6BF, 0x99B6FF,
  0x99DB00, 0x99DB40, 0x99DB80, 0x99DBBF, 0x99DBFF, 0x99FF00, 0x99FF40, 0x99FF80, 0x99FFBF, 0x99FFFF, 0xA5A5A5, 0xB4B4B4, 0xC3C3C3, 0xCC0000, 0xCC0040, 0xCC0080,
  0xCC00BF, 0xCC00FF, 0xCC2400, 0xCC2440, 0xCC2480, 0xCC24BF, 0xCC24FF, 0xCC4900, 0xCC4940, 0xCC4980, 0xCC49BF, 0xCC49FF, 0xCC6D00, 0xCC6D40, 0xCC6D80, 0xCC6DBF,
  0xCC6DFF, 0xCC9200, 0xCC9240, 0xCC9280, 0xCC92BF, 0xCC92FF, 0xCCB600, 0xCCB640, 0xCCB680, 0xCCB6BF, 0xCCB6FF, 0xCCDB00, 0xCCDB40, 0xCCDB80, 0xCCDBBF, 0xCCDBFF,
  0xCCFF00, 0xCCFF40, 0xCCFF80, 0xCCFFBF, 0xCCFFFF, 0xD2D2D2, 0xE1E1E1, 0xF0F0F0, 0xFF0000, 0xFF0040, 0xFF0080, 0xFF00BF, 0xFF00FF, 0xFF2400, 0xFF2440, 0xFF2480,
  0xFF24BF, 0xFF24FF, 0xFF4900, 0xFF4940, 0xFF4980, 0xFF49BF, 0xFF49FF, 0xFF6D00, 0xFF6D40, 0xFF6D80, 0xFF6DBF, 0xFF6DFF, 0xFF9200, 0xFF9240, 0xFF9280, 0xFF92BF,
  0xFF92FF, 0xFFB600, 0xFFB640, 0xFFB680, 0xFFB6BF, 0xFFB6FF, 0xFFDB00, 0xFFDB40, 0xFFDB80, 0xFFDBBF, 0xFFDBFF, 0xFFFF00, 0xFFFF40, 0xFFFF80, 0xFFFFBF, 0xFFFFFF,
}

function HEXtoRGB(color)
  return bit32.rshift(color, 16), bit32.band(bit32.rshift(color, 8), 0xFF), bit32.band(color, 0xFF)
end

function RGBtoHEX(rr, gg, bb)
  return bit32.lshift(rr, 16) + bit32.lshift(gg, 8) + bb
end

local function mergeBytesToNumber(...)
	local bytes = {...}
	local finalNumber = bytes[1]
	for i = 2, #bytes do
		finalNumber = bit32.bor(bit32.lshift(finalNumber, 8), bytes[i])
	end
	return finalNumber
end

-- Сконвертировать все переданные байты в строку
local function convertBytesToString(...)
	local bytes = {...}
	for i = 1, #bytes do
		bytes[i] = string.char(bytes[i])
	end
	return table.concat(bytes)
end

--Выделить бит-терминатор в первом байте UTF-8 символа: 1100 0010 --> 0010 0000
local function selectTerminateBit_l()
	local prevByte = nil
	local prevTerminateBit = nil

	return function( byte )
		local x, terminateBit = nil
		if ( prevByte == byte ) then
			return prevTerminateBit
		end

		x = bit32.band( bit32.bnot(byte), 0x000000FF )
		x = bit32.bor( x, bit32.rshift(x, 1) )
		x = bit32.bor( x, bit32.rshift(x, 2) )
		x = bit32.bor( x, bit32.rshift(x, 4) )
		x = bit32.bor( x, bit32.rshift(x, 8) )
		x = bit32.bor( x, bit32.rshift(x, 16) )

		terminateBit = x - bit32.rshift(x, 1)

		prevByte = byte
		prevTerminateBit = terminateBit

		return terminateBit
	end
end
local selectTerminateBit = selectTerminateBit_l()

--Прочитать n байтов из файла, возвращает прочитанные байты как число, если не удалось прочитать, то возвращает 0
local function readBytes(file, count)
  local readedBytes = file:read(count)
  return mergeBytesToNumber(string.byte(readedBytes, 1, count))
end

--Подготавливает цвета и символ для записи в файл сжатого формата
local function encodePixel(background, foreground, alpha, char)
	--Расхерачиваем жирные цвета в компактные цвета
	local ascii_background1, ascii_background2, ascii_background3 = HEXtoRGB(background)
	local ascii_foreground1, ascii_foreground2, ascii_foreground3 = HEXtoRGB(foreground)
	--Расхерачиваем жирный код юникод-символа в несколько миленьких ascii-кодов
	local ascii_char1, ascii_char2, ascii_char3, ascii_char4, ascii_char5, ascii_char6 = string.byte( char, 1, 6 )
	ascii_char1 = ascii_char1 or constants.nullChar
	--Возвращаем все расхераченное
	return ascii_background1, ascii_background2, ascii_background3, ascii_foreground1, ascii_foreground2, ascii_foreground3, alpha, ascii_char1, ascii_char2, ascii_char3, ascii_char4, ascii_char5, ascii_char6
end

--Декодирование UTF-8 символа
local function decodeChar(file)
	local first_byte = readBytes(file, 1)
	local charcode_array = {first_byte}
	local len = 1

	local middle = selectTerminateBit(first_byte)
	if ( middle == 32 ) then
		len = 2
	elseif ( middle == 16 ) then
		len = 3
	elseif ( middle == 8 ) then
		len = 4
	elseif ( middle == 4 ) then
		len = 5
	elseif ( middle == 2 ) then
		len = 6
	end

	for i = 1, len-1 do
		table.insert( charcode_array, readBytes(file, 1) )
	end

	return string.char( table.unpack( charcode_array ) )
end

local function convert8BitTo24Bit(hex8)
  return palette[hex8 + 1]
end

local function convertCoordsToIndex(x, y, width)
	return (width * (y - 1) + x) * constants.elementCount - constants.elementCount + 1
end

local function loadOCIF2(file, decompressColors, useOCIF4)
	local picture = {}

	--Читаем размер изображения
	local readedWidth = string.byte(file:read(1))
	local readedHeight = string.byte(file:read(1))
	--local readednum = string.byte(file:read(1))
	picture.width = readedWidth
	picture.height = readedHeight
	--picture.num = readednum

	local header, alpha, symbol, foreground, background, y, alphaSize, symbolSize, foregroundSize, backgroundSize, ySize = ""
	while true do
		header = file:read(1)
		if not header or header == "C" then break end
		-- print("----------------------")
		-- print("Заголовок: " .. header)
		if header == "A" then
			local countOfBytesForArraySize = string.byte(file:read(1))
			alphaSize = string.byte(file:read(countOfBytesForArraySize))
			alpha = string.byte(file:read(1))
			-- print("Количество байт под размер массива символов: " .. countOfBytesForArraySize)
			-- print("Размер массива символов: " .. alphaSize)
			-- print("Альфа: " .. alpha)

		elseif header == "S" then
			if decompressColors then
				symbolSize = string.byte(file:read(1))
			else
				symbolSize = mergeBytesToNumber(string.byte(file:read(3), 1, 3))
			end
			symbol = decodeChar(file)
			-- print("Размер массива цвета текста: " .. symbolSize)
			-- print("Символ: \"" .. symbol .. "\"")

		elseif header == "F" then
			if decompressColors then
				foregroundSize = string.byte(file:read(1))
				foreground = convert8BitTo24Bit(string.byte(file:read(1)))
			else
				foregroundSize = mergeBytesToNumber(string.byte(file:read(3), 1, 3))
				foreground = mergeBytesToNumber(string.byte(file:read(3), 1, 3))
			end
			-- print("Размер массива цвета фона: " .. foregroundSize)
			-- print("Цвет текста: " .. foreground)

		elseif header == "B" then
			backgroundSize = mergeBytesToNumber(string.byte(file:read(2), 1, 2))
			if decompressColors then
				background = convert8BitTo24Bit(string.byte(file:read(1)))
			else
				background = mergeBytesToNumber(string.byte(file:read(3), 1, 3))
			end
			-- print("Размер массива координат: " .. backgroundSize)
			-- print("Цвет фона: " .. background)

			--Поддержка загрузки формата OCIF3
			if not useOCIF4 then
				--Читаем координаты
				for i = 1, backgroundSize, 2 do
					local x = string.byte(file:read(1))
					local y = string.byte(file:read(1))
					local index = convertCoordsToIndex(x, y, readedWidth)
					-- print("Координата: " .. x .. "x" .. y .. ", индекс: "..index)

					picture[index] = background
					picture[index + 1] = foreground
					picture[index + 2] = alpha
					picture[index + 3] = symbol
				end
			end

		--Новый формат OCIF4
		elseif header == "Y" and useOCIF4 then
			ySize = string.byte(file:read(1))
			y = string.byte(file:read(1))
			-- print("Размер массива Y: " .. ySize)
			-- print("Текущий Y: " .. y)

			for i = 1, ySize do
				local x = string.byte(file:read(1))
				local index = convertCoordsToIndex(x, y, readedWidth)
				-- print("Координата: " .. x .. "x" .. y .. ", индекс: "..index)

				picture[index] = background
				picture[index + 1] = foreground
				picture[index + 2] = alpha
				picture[index + 3] = symbol
			end
		else
			error("Error while reading OCIFM format: unknown Header type (" .. header .. ")")
		end
	end
	return picture
end

local file = io.open(args[1],"rb")
--buffer.start()
if file:read(5) ~= "OCIFM" then
	error("ЭТОТ ФОРМАТ НЕ ПОДДЕРЖИВАЕТСЯ!!!")
end

while true do
	local chto=file:read(1)
	if chto == "O" then
		local imgdata=loadOCIF2(file, true, true)
		local arrnum = {1,14,27,40}
		image.draw(1, 1, imgdata)
		--buffer.image(1,arrnum[imgdata.num],imgdata)
		--buffer.draw()
		os.sleep(0)
	elseif not chto then
		break
	end
end