fastimage

README

fastimage - fast image info for go

Getting Started

try on https://play.golang.org/p/8yHaCknD1Rm

package main

import (
	"fmt"
	"github.com/phuslu/fastimage"
)

var data = []byte("RIFF,-\x00\x00WEBPVP8X\n\x00\x00\x00" +
    "\x10\x00\x00\x00\x8f\x01\x00,\x01\x00VP8X\n\x00\x00\x00\x10\xb2" +
    "\x01\x00\x00WEB\x01\x00VP8X\n\x00\x00\x00\x10\xb2\x01\x00" +
    "\x00WEB\x01\x00VP8X\n\x00\x00\x00\x10\xb2\x01\x00\x00W" +
    "EB\x01\x00VP8X\n\x00\x00\x00\x10\xb2\x01\x00\x00WEB"")

func main() {
	fmt.Printf("%+v\n", fastimage.GetInfo(data))
}

// Output: {Type:webp Width:400 Height:301}

Command Tool

$ go get github.com/phuslu/fastimage/cmd/fastimage
$ fastimage banner.png
png image/png 320 50

Documentation

Index

• type Info
  • func GetInfo(p []byte) (info Info)
• type Type
  • func (t Type) Mime() string
  • func (t Type) String() string

Types

type Info

type Info struct {
	Type   Type
	Width  uint32
	Height uint32
}

Info holds the type and dismissons of an image

func GetInfo

func GetInfo(p []byte) (info Info)

GetInfo detects a image info of data.

type Type

type Type uint64

Type represents the type of the image detected, or `Unknown`.

const (
	// Unknown represents an unknown image type
	Unknown Type = iota
	// BMP represendts a BMP image
	BMP
	// BPM represendts a BPM image
	BPM
	// GIF represendts a GIF image
	GIF
	// JPEG represendts a JPEG image
	JPEG
	// MNG represendts a MNG image
	MNG
	// PBM represendts a PBM image
	PBM
	// PCX represendts a PCX image
	PCX
	// PGM represendts a PGM image
	PGM
	// PNG represendts a PNG image
	PNG
	// PPM represendts a PPM image
	PPM
	// PSD represendts a PSD image
	PSD
	// RAS represendts a RAS image
	RAS
	// RGB represendts a RGB image
	RGB
	// TIFF represendts a TIFF image
	TIFF
	// WEBP represendts a WEBP image
	WEBP
	// XBM represendts a XBM image
	XBM
	// XPM represendts a XPM image
	XPM
	// XV represendts a XV image
	XV
)

func (Type) Mime

func (t Type) Mime() string

Mime return mime type of image type

func (Type) String

func (t Type) String() string

String return a lower name of image type