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require"imlua"
require"lfs"
function PrintError(error)
local msg = {}
msg[im.ERR_OPEN] = "Error Opening File."
msg[im.ERR_MEM] = "Insuficient memory."
msg[im.ERR_ACCESS] = "Error Accessing File."
msg[im.ERR_DATA] = "Image type not Suported."
msg[im.ERR_FORMAT] = "Invalid Format."
msg[im.ERR_COMPRESS] = "Invalid or unsupported compression."
if msg[error] then
print(msg[error])
else
print("Unknown Error.")
end
end
function FindZero(data)
if (not data) then return false end
for i = 1, table.getn(data) do
if data[i] == 0 then
return true
end
end
return false
end
function AttribData2Str(data, data_type)
local data_str
if data_type == im.BYTE then
data_str = string.format("%3d", data[1])
elseif data_type == im.USHORT then
data_str = string.format("%5d", data[1])
elseif data_type == im.INT then
data_str = string.format("%5d", data[1])
elseif data_type == im.FLOAT then
data_str = string.format("%5.2f", data[1])
elseif data_type == im.CFLOAT then
data_str = string.format("%5.2f, %5.2f", data[1], data[2])
end
return data_str
end
function GetSizeDesc(size)
local size_desc
if size < 1024 then
size_desc = "b"
else
size = size / 1024
if size < 1024 then
size_desc = "Kb"
else
size = size / 1024
size_desc = "Mb"
end
end
return size, size_desc
end
function FileSize(file_name)
if lfs then
local attr = lfs.attributes(file_name)
return attr.size
else
return 0
end
end
function PrintImageInfo(file_name)
print("IM Info")
print(string.format(" File Name:\n %s", file_name))
local ifile, error = im.FileOpen(file_name)
if not ifile then
PrintError(error)
return nil
end
local file_size = FileSize(file_name)
print(string.format(" File Size: %.2f %s", GetSizeDesc(file_size)))
local format, compression, image_count = ifile:GetInfo()
local error, format_desc = im.FormatInfo(format)
print(string.format(" Format: %s - %s", format, format_desc))
print(string.format(" Compression: %s", compression))
print(string.format(" Image Count: %d", image_count))
for i = 1, image_count do
local error, width, height, color_mode, data_type = ifile:ReadImageInfo(i-1)
if width == nil then
PrintError(height)
ifile:Close()
return nil
end
print(string.format(" Image #%d", i))
print(string.format(" Width: %d", width))
print(string.format(" Height: %d", height))
print(string.format(" Color Space: %s", im.ColorModeSpaceName(color_mode)))
print(string.format(" Has Alpha: %s", im.ColorModeHasAlpha(color_mode) and "Yes" or "No"))
print(string.format(" Is Packed: %s", im.ColorModeIsPacked(color_mode) and "Yes" or "No"))
print(string.format(" Is Top Down: %s", im.ColorModeIsTopDown(color_mode) and "Yes" or "No"))
print(string.format(" Data Type: %s", im.DataTypeName(data_type)))
local image_size = im.ImageDataSize(width, height, color_mode, data_type)
print(string.format(" Data Size: %.2f %s", GetSizeDesc(image_size)))
local attrib_list = ifile:GetAttributeList()
for a = 1, table.getn(attrib_list) do
if a == 1 then
print(" Attributes:")
end
local attrib_data, attrib_data_type = ifile:GetAttribute(attrib_list[a])
if table.getn(attrib_data) == 1 then
print(string.format(" %s: %s", attrib_list[a], AttribData2Str(attrib_data, attrib_data_type)))
elseif attrib_data_type == im.BYTE and FindZero(attrib_data) then
attrib_data = ifile:GetAttribute(attrib_list[a], true)
print(string.format(" %s: %s", attrib_list[a], attrib_data))
else
print(string.format(" %s: %s ...", attrib_list[a], AttribData2Str(attrib_data, attrib_data_type)))
end
end
end
ifile:Close()
end
function main(arg)
if (not arg or table.getn(arg) < 1) then
print("Invalid number of arguments.")
return nil
end
PrintImageInfo(arg[1])
return 1
end
--main(arg)
PrintImageInfo("lena.jpg")
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