Method CheckResolution

processor/vipsprocessor/processor.go:506–516

CheckResolution check image resolution for image bomb prevention

(img *vips.Image, err error)

// CheckResolution check image resolution for image bomb prevention
func (v *Processor) CheckResolution(img *vips.Image, err error) (*vips.Image, error) {
	if err != nil || img == nil {
		return img, err
	}
	if !v.Unlimited && (img.Width() > v.MaxWidth || img.PageHeight() > v.MaxHeight ||
		(img.Width()*img.Height()) > v.MaxResolution) {
		img.Close()
		return nil, imagor.ErrMaxResolutionExceeded
	}
	return img, nil
}

func isMultiPage(blob *imagor.Blob, n, page int) bool {
	return blob != nil && (blob.SupportsAnimation() || blob.BlobType() == imagor.BlobTypePDF) && ((n != 1 && n != 0) || (page != 1 && page != 0))