graphicsmagick

type Handler ¶

type Handler struct {
	Executable     string        // path to "gm" executable, usually "/usr/bin/gm"
	Timeout        time.Duration // timeout for process, optional
	TempDir        string        // temp directory for image files, optional
	AllowedFormats []string      // allowed format list, optional
}

Handler is a GraphicsMagick Image Handler.

It processes the Image with the GraphicsMagick command line (mogrify command).

All params are extracted from the "graphicsmagick" node param and are optionals.

See GraphicsMagick documentation for more information about arguments.

Params:

- width / height: sizes for "-resize" argument (both optionals)

- fill: "^" for "-resize" argument

- ignore_ratio: "!" for "-resize" argument

- only_shrink_larger: ">" for "-resize" argument

- only_enlarge_smaller: "<" for "-resize" argument

- background: color for "-background" argument, 3/4/6/8 lower case hexadecimal characters

- extent: "-extent" param, uses width/height params and add "-gravity center" argument

- format: "-format" param

- quality: "-quality" param

func (hdr *Handler) Handle(im *imageserver.Image, params imageserver.Params) (*imageserver.Image, error)