How to rotate an image?

External Google graphics package used to rotate the image.

Example

package main

import (    
    "os"
    "math"	
    "image"
    "image/jpeg"
    "code.google.com/p/graphics-go/graphics"
)

func main() {
    imagePath, _ := os.Open("jellyfish.jpg")
    defer imagePath.Close()
    srcImage, _, _ := image.Decode(imagePath)

	srcDim := srcImage.Bounds()
	dstImage := image.NewRGBA(image.Rect(0, 0, srcDim.Dy(), srcDim.Dx()))
	graphics.Rotate(dstImage, srcImage, &graphics.RotateOptions{math.Pi / 2.0})
	
	newImage, _ := os.Create("newjellyfish.jpg")
    defer newImage.Close()
    jpeg.Encode(newImage, dstImage, &jpeg.Options{jpeg.DefaultQuality})

}

Most Helpful This Week

How to print struct variables data in Golang? Golang Read Write and Process data in CSV Regular expression to validate common Credit Card Numbers How to Unmarshal nested JSON structure? Higher Order Functions in Golang Various examples of Carbon date-time package in Golang How to get the current date and time with timestamp in local and other timezones ? Add N number of Year, Month, Day, Hour, Minute, Second, Millisecond, Microsecond and Nanosecond to current date-time How can I convert a string variable into Boolean, Integer or Float type in Golang? How to update content of a text file?

Golang Tutorial

Golang Reference

Beego Framework

How to rotate an image?

Example

Most Helpful This Week

Most Helpful This Week