Golang how to concatenate/append images to one another

Question

Go has great image manipulation and data libraries however I\'m having trouble creating one big image from smaller ones. Does anyone know how to take two png or jpeg files

Answer 1

I built a library exactly for this purpose.

You can use it as follows;

import gim "github.com/ozankasikci/go-image-merge"

grids := []*gim.Grid{
    {ImageFilePath: "test1.jpg"},
    {ImageFilePath: "test2.png"},
}

// merge the images into a 2x1 grid
rgba, err := gim.New(grids, 2, 1).Merge()

// save the output to jpg or png
file, err := os.Create("file/path.jpg|png")
err = jpeg.Encode(file, rgba, &jpeg.Options{Quality: 80})

https://github.com/ozankasikci/go-image-merge