local path_src = File.GetAbsolute("./src/")
local path_out = File.GetAbsolute("./out/")
local scale = 0.5

-- 创建输出目录
File.CreateFolder(path_out)

local ret_files = File.GetPathFileAll(path_src, Img.REGEX_FORMAT, false)

for key, value in pairs(ret_files) do
    -- 
    local img = Img.Create(value)
    local out = path_out .. File.GetRelative(value, path_src)
    out = String.ReplaceExtension(out, "png")


    -- 锚点文件处理
    local mata_name = String.EraseFilename(value)
    mata_name = mata_name .. "Placements/".. String.GetFileStem(value) .. ".txt"
    local out_name = String.EraseFilename(out)
    File.CreateFolder(out_name .. "Placements/")
    out_name = out_name .. "Placements/".. String.GetFileStem(value) .. ".txt"
    
    -- 读取旧锚点
    local anchor = Point()
    local str = File.GetString(mata_name)
    if #str > 0 then
        -- print(str)
        anchor = -String.toPoint2(str, '\n')
    end

    -- 裁切
    local rect = RectU()
    local pos_lt = Align.GetLT(rect)
    
    Img.CalcLeastRect(img, rect)
    local new_size = Align.GetSize(rect)
    local img_out = Img.Create(new_size, ColorDef.WHITE)

    Img.AddRect(img_out, img, rect, PointU())
    delete(img)
    Img.Save(img_out, out)

    -- 新锚点
    local pos_lt_out = Align.GetLT(rect)
    local anchor_out = anchor - (toPoint(pos_lt_out) - toPoint(pos_lt))
    local str = -anchor_out.x..'\n'..-anchor_out.y
    File.SaveString(str, out_name)

    print(value .. "->" .. out)
end

print "此工具会批量裁切src文件夹的所有图片，去除透明色并计算新锚点"

pause()