Golang React JS Technology Blog

How to create thumbnail of an image?

In dstImage the size 80 X 80 passed to create thumbnail of 80px 80px. Google graphics package used to generate thumbnail of image.

Example

package main

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

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

	// Dimension of new thumbnail 80 X 80	
	dstImage := image.NewRGBA(image.Rect(0, 0, 80, 80))
	// Thumbnail function of Graphics
	graphics.Thumbnail(dstImage, srcImage)
	
	newImage, _ := os.Create("thumbnail.jpg")
    defer newImage.Close()
    jpeg.Encode(newImage, dstImage, &jpeg.Options{jpeg.DefaultQuality})	
}
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