engines

type Engine interface {
	Resize(img *image.ImageFile, width int, height int, options *Options) ([]byte, error)
	Thumbnail(img *image.ImageFile, width int, height int, options *Options) ([]byte, error)
	Transform(img *image.ImageFile, operation *Operation, qs map[string]string) (*image.ImageFile, error)
	Flip(img *image.ImageFile, pos string, options *Options) ([]byte, error)
	Rotate(img *image.ImageFile, deg int, options *Options) ([]byte, error)
	Fit(img *image.ImageFile, width int, height int, options *Options) ([]byte, error)
}

type GoImageEngine struct {
	DefaultFormat  string
	Format         string
	DefaultQuality int
}

type ImageTransformation func(img image.Image) *image.NRGBA

type Operation struct {
	Name string
}

type Options struct {
	Upscale bool
	Format  imaging.Format
	Quality int
}

type Result struct {
	Image    image.Image
	Position int
	Paletted *image.Paletted
}

type Transformation func(img image.Image, width int, height int, filter imaging.ResampleFilter) *image.NRGBA