Function NewImageHashFromBytes

testutil/image_hash.go:58–77

NewImageHashFromBytes loads an image from a byte slice and calculates its hash

(data []byte, hashType ImageHashType)

// NewImageHashFromBytes loads an image from a byte slice and calculates its hash
func NewImageHashFromBytes(data []byte, hashType ImageHashType) (*ImageHash, error) {
	h := &ImageHash{hashType: hashType}

	switch hashType {
	case HashTypeDct:
		if err := h.calcDct2Hash(data); err != nil {
			return nil, err
		}

	case HashTypeSHA256:
		if err := h.calcSha256Hash(data); err != nil {
			return nil, err
		}

	default:
		return nil, fmt.Errorf("unsupported hash type: %d", hashType)
	}

	return h, nil
}

// Distance calculates the distance between two hashes
// Returns error if hash types don't match