package images import ( "fmt" "image" "github.com/nfnt/resize" "github.com/oliamb/cutter" ) func Resize(size ResizeDimension, img image.Image) image.Image { var width, height uint switch { case img.Bounds().Max.X == img.Bounds().Max.Y: width, height = uint(size), uint(size) case img.Bounds().Max.X > img.Bounds().Max.Y: width, height = 0, uint(size) default: width, height = uint(size), 0 } return resize.Resize(width, height, img, resize.Bilinear) } func Crop(img image.Image, rect image.Rectangle) (image.Image, error) { if img.Bounds().Max.X < rect.Max.X || img.Bounds().Max.Y < rect.Max.Y { return nil, fmt.Errorf( "crop dimensions out of bounds of image, image width '%dpx' & height '%dpx'; crop bottom right coordinate at X '%dpx' Y '%dpx'", img.Bounds().Max.X, img.Bounds().Max.Y, rect.Max.X, rect.Max.Y, ) } return cutter.Crop(img, cutter.Config{ Width: rect.Dx(), Height: rect.Dy(), Anchor: rect.Min, }) }