app

var OptionColor = &StringOption{
	option: option{
		name:  "color",
		usage: "font color with string (back, white, red, blue, green). or specify by color code(like #FF0000)",
	},
	defaultVal: "",
}

var OptionHeight = &UintOption{
	option: option{
		name:  "height",
		usage: "height px.",
	},
	defaultVal: 0,
}

var OptionLeft = &UintOption{
	option: option{
		name:  "left",
		usage: "start left point px.",
	},
	defaultVal: 0,
}

var OptionMode = &StringOption{
	option: option{
		name:  "mode",
		usage: "filter color(sepia, gray).",
	},
	defaultVal: "",
}

var OptionRatio = &Float64Option{
	option: option{
		name:  "ratio",
		usage: "ratio. if ratio is set, width and height are ignored.",
	},
	defaultVal: 0,
}

var OptionSize = &UintOption{
	option: option{
		name:  "size",
		usage: "font size.",
	},
	defaultVal: 0,
}

var OptionText = &StringOption{
	option: option{
		name:  "text",
		usage: "text.",
	},
	defaultVal: "",
}

var OptionTop = &UintOption{
	option: option{
		name:  "top",
		usage: "start top point px.",
	},
	defaultVal: 0,
}

var OptionTtf = &StringOption{
	option: option{
		name:  "ttf",
		usage: "ttf file path.",
	},
	defaultVal: "",
}

var OptionVertical = &BoolOption{
	option: option{
		name:  "vertical",
		usage: "specify direction as vertical. default horizon.",
	},
	defaultVal: false,
}

var OptionWidth = &UintOption{
	option: option{
		name:  "width",
		usage: "width px.",
	},
	defaultVal: 0,
}

var OptionX = &UintOption{
	option: option{
		name:  "x",
		usage: "x length.",
	},
	defaultVal: 0,
}

var OptionY = &UintOption{
	option: option{
		name:  "y",
		usage: "y length.",
	},
	defaultVal: 0,
}

var SubCommandAddstring = &SubCommand{
	Name:            "addstring",
	Usage:           "add string on image",
	RequiredOptions: []Option{OptionText},
	OptionalOptions: []Option{OptionTtf, OptionSize, OptionTop, OptionLeft, OptionColor},
}

var SubCommandFilter = &SubCommand{
	Name:            "filter",
	Usage:           "filter with the specified color mode",
	RequiredOptions: []Option{OptionMode},
	OptionalOptions: []Option{},
}

var SubCommandGif = &SubCommand{
	Name:            "gif",
	Usage:           "file convert to gif",
	RequiredOptions: []Option{},
	OptionalOptions: []Option{},
}

var SubCommandGrayscale = &SubCommand{
	Name:            "grayscale",
	Usage:           "deprecated this command, use filter -mode gray",
	RequiredOptions: []Option{},
	OptionalOptions: []Option{},
}

var SubCommandJpeg = &SubCommand{
	Name:            "jpeg",
	Usage:           "file convert to jpeg",
	RequiredOptions: []Option{},
	OptionalOptions: []Option{},
}

var SubCommandPng = &SubCommand{
	Name:            "png",
	Usage:           "file convert to png",
	RequiredOptions: []Option{},
	OptionalOptions: []Option{},
}

var SubCommandResize = &SubCommand{
	Name:            "resize",
	Usage:           "resize image",
	RequiredOptions: []Option{},
	OptionalOptions: []Option{OptionWidth, OptionHeight, OptionRatio},
}

var SubCommandReverse = &SubCommand{
	Name:            "reverse",
	Usage:           "reverse image",
	RequiredOptions: []Option{},
	OptionalOptions: []Option{OptionVertical},
}

var SubCommandTile = &SubCommand{
	Name:            "tile",
	Usage:           "lay down images with x * y",
	RequiredOptions: []Option{OptionX, OptionY},
	OptionalOptions: []Option{},
}

var SubCommandTrim = &SubCommand{
	Name:            "trim",
	Usage:           "trim image",
	RequiredOptions: []Option{OptionLeft, OptionTop, OptionWidth, OptionHeight},
	OptionalOptions: []Option{},
}

var SupportedSubCommands = SubCommands{
	SubCommandReverse,
	SubCommandResize,
	SubCommandTile,
	SubCommandTrim,
	SubCommandFilter,
	SubCommandGrayscale,
	SubCommandAddstring,
	SubCommandPng,
	SubCommandJpeg,
	SubCommandGif,
}