imageutil

Documentation

Overview

Package imageutil adds functions for working with images.

Index

• func DetectImage(data []byte) string
• func DetectImageStream(fp io.ReadSeeker) (string, error)

Functions

func DetectImage

func DetectImage(data []byte) string

DetectImage detects the image type of the data.

It's a copy of http.DetectContentType with some unnecessary parts removed, making it about 10 times faster.

It returns an empty string if the image type can't be determined.

func DetectImageStream

func DetectImageStream(fp io.ReadSeeker) (string, error)

DetectImageStream works like DetectImage, but operates on a file stream. It reads the minimal amount of data needed and Seek() back to where the offset was.