diff --git a/asset/plugin/util_tm2.lua b/asset/plugin/util_tm2.lua
new file mode 100644
index 0000000..f4c1f30
--- /dev/null
+++ b/asset/plugin/util_tm2.lua
@@ -0,0 +1,220 @@
+---@diagnostic disable : lowercase-global, missing-fields, undefined-global, duplicate-doc-field, undefined-field
+
+version = "v0.1"
+description = "[lua_util_tm2::init] lua plugin to decode tim2 texture (including swizzle)"
+
+-- global declear 
+g_data = nil --- @type string
+g_tilecfg = {} ---@type tilecfg_t
+g_uijson = [[
+{
+    "plugincfg" : [
+        {"name": "swizzle", "type": "bool", "value": 0}, 
+        {"name": "blockw", "type": "int", "value": 16}, 
+        {"name": "blockh", "type": "int", "value": 8}
+    ]
+}]]
+g_plugincfg = {}
+
+-- tm2 declear
+---@class tm2pic_t
+---@field size_total integer
+---@field size_palette integer
+---@field size_image integer
+---@field size_header integer
+---@field count_color integer
+---@field format integer
+---@field count_mipmap integer
+---@field type_clutcolor integer
+---@field type_imagecolor integer
+---@field width integer
+---@field height integer
+---@field reg_gstex1 integer
+---@field reg_gstex2 integer
+---@field reg_gsflag integer
+---@field reg_gsclut integer
+
+---@class tm2_t
+---@field magic string
+---@field version integer
+---@field format integer
+---@field count integer
+---@field reserved integer
+
+COLOR_TYPE = {
+    UNDEFINED = 0,
+    A1B5G5R5 = 1,
+    X8B8G8R8 = 2,
+    A8B8G8R8 = 3,
+    INDEX4 = 4,
+    INDEX8 = 5,
+}
+
+g_tm2 = {} ---@type tm2_t
+g_tm2pic = {} ---@type tm2pic_t
+g_dataoffset = 0 ---@type integer
+g_palatte = nil
+g_swizzlemap = {}
+
+function swizzle_tm2(x, y, w, blockw, blockh)
+    idx = x + w*y
+    blocksize = blockw * blockh
+    blockline = w // blockw
+    blockidx = idx // blocksize
+    blocky = blockidx // blockline
+    blockx = blockidx % blockline
+
+    blockinneridx = idx % blocksize
+    blockinnery = blockinneridx // blockw
+    blockinnerx = blockinneridx % blockw
+
+    x2 = blockx * blockw + blockinnerx
+    y2 = blocky * blockh + blockinnery
+    return x2, y2
+end
+
+function deinterlace_palatte(palatte)
+    parts = (#palatte + 1 ) // 32
+    stripes = 2
+    colors = 8
+    blocks = 2
+
+    newpallate = {}
+    i = 0
+    for part = 0, parts - 1 do
+        for block = 0, blocks - 1 do
+            for stripe = 0, stripes - 1 do
+                for color = 0, colors - 1 do
+                    i2 = part * colors * stripes * blocks + block * colors + stripe * stripes * colors + color
+                    newpallate[i] = palatte[i2]
+                    -- print(part, block, stripe, color, i, i2)
+                    i = i + 1
+                end
+            end
+        end
+    end
+
+    return newpallate
+end
+
+function parse_tm2(data)
+    TM2_FMT, TM2PIC_FMT = "<c4BBHI8", "<I4I4I4HHBBBBHHI8I8I4I4"
+    local magic, version, format, count, reversed = string.unpack(TM2_FMT, data)
+    local tm2  = {magic=magic, version=version, format=format, count=count, reversed=reversed}
+    local tm2picoffset = string.packsize(TM2_FMT)
+    local size_total, size_palette, size_image, size_header,
+        count_color, format, count_mipmap,
+        type_clutcolor, type_imagecolor, width, height,
+        reg_gstex1, reg_gstex2, reg_gsflag, reg_gsclut = string.unpack(TM2PIC_FMT, data, tm2picoffset + 1)
+    local tm2pic = {
+        size_total=size_total, size_palette=size_palette,
+        size_image=size_image, size_header=size_header,
+        count_color=count_color, format=format, count_mipmap=count_mipmap,
+        type_clutcolor=type_clutcolor, type_imagecolor=type_imagecolor,
+        width=width, height=height,
+        reg_gstex1=reg_gstex1, reg_gstex2=reg_gstex2,
+        reg_gsflag=reg_gsflag, reg_gsclut=reg_gsclut
+    }
+    local dataoffset = tm2picoffset + string.packsize(TM2PIC_FMT)
+    return tm2, tm2pic, dataoffset
+end
+
+function decode_pre()
+    -- get neccessory data for decoding
+    g_data = get_rawdata()
+
+    -- get tile information from tm2
+    g_tm2, g_tm2pic, g_dataoffset = parse_tm2(g_data)
+    if g_tm2.magic ~= "TIM2" then
+        log("Not a tim2 format file")
+        return false
+    end
+
+    -- set the information for decoding
+    g_tilecfg.w, g_tilecfg.h = g_tm2pic.width, g_tm2pic.height
+    g_tilecfg.bpp = math.ceil(math.log(g_tm2pic.count_color, 2))
+    g_tilecfg.nbytes = 0
+    g_tilecfg.nrow = 1
+    set_tilecfg(g_tilecfg)
+
+    log(string.format("[lua_util_tm2::pre] datasize=%d w=%d h=%d bpp=%d nbytes=%d",
+        g_data:len(), g_tilecfg.w, g_tilecfg.h, g_tilecfg.bpp, g_tilecfg.nbytes))
+
+    -- set other information
+    if g_tm2pic.count_color <= 256 then --palatte
+        g_palatte = {}
+        local offsetpalatte = g_dataoffset + g_tm2pic.size_image
+        for i=0, g_tm2pic.count_color - 1 do
+            a, r, g, b = string.unpack("<BBBB", g_data, offsetpalatte + i*4)
+            g_palatte[i] = r + (g << 8) + (b << 16) + (a << 24)
+            -- print(string.format(" palatte[%d] %x", i, g_palatte[i]))
+        end
+
+        if g_tm2pic.type_clutcolor & 0x80 == 0 then
+           g_palatte = deinterlace_palatte(g_palatte)
+        else
+
+        end
+    end
+    for y= 0, g_tm2pic.height do -- swizzle map
+        for x= 0, g_tm2pic.width do
+            idx1 = y * g_tm2pic.width + x
+            x2, y2 = swizzle_tm2(x, y, g_tm2pic.width, g_plugincfg.blockw, g_plugincfg.blockh)
+            idx2 = y2 * g_tm2pic.width + x2
+            g_swizzlemap[idx2] = idx
+        end
+    end
+
+    return true
+end
+
+function decode_pixel(i, x, y)
+    pixel = 0
+    color_type = g_tm2pic.type_imagecolor
+    idx = y * g_tm2pic.width + x
+
+    -- check swizzle
+    if g_plugincfg.swizzle then
+        idx = g_swizzlemap[idx]
+    end
+    if idx == nil then return 0 end
+
+    -- decode in different formats
+    if(color_type == COLOR_TYPE.INDEX4) then -- not tested yet
+        d = string.byte(g_data, g_dataoffset + idx / 2 + 1)
+        if idx % 2 then d = d >> 4
+        else  d = d & 0xf end
+        pixel = g_palatte[d]
+    elseif (color_type == COLOR_TYPE.INDEX8) then
+        d = string.byte(g_data, g_dataoffset + idx + 1)
+        pixel = g_palatte[d]
+    elseif (color_type == COLOR_TYPE.A8B8G8R8) then -- not tested yet
+        pixel = string.unpack(g_data, ">I4", g_dataoffset + idx * 4 + 1)
+    end
+
+    return pixel
+end
+
+function decode_post()
+    log("[lua_util_tm2::post] decode finished")
+    set_tilenav({index=0, offset=-1})
+    set_tilestyle({scale=1.5})
+    g_data = nil
+    return true
+end
+
+function decode_sendui()
+    return g_uijson
+end
+
+function decode_recvui(cfg)
+    for i, t in ipairs(cfg.plugincfg) do
+        -- log(i, t.name, t.value)
+        if(t.name == "swizzle") then g_plugincfg.swizzle = t.value > 0 end
+        if(t.name == "blockw") then g_plugincfg.blockw = math.floor(t.value) end
+        if(t.name == "blockh") then g_plugincfg.blockh = math.floor(t.value) end
+    end
+    return true
+end
+
+log("   ", description, version)
\ No newline at end of file