1 files changed, 149 insertions, 0 deletions
diff --git a/html/examples/info.lua b/html/examples/info.lua
new file mode 100644
index 0000000..b1afb2a
--- /dev/null
+++ b/html/examples/info.lua
@@ -0,0 +1,149 @@
+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")