How to Draw a rectangle in Golang?

Below is a short program to create a PNG image of 200 X 200 size. In green variable RGBA value of green color assigned

Example


package main

import (
    "image"
    "image/color"
    "image/draw"
    "image/png"
    "os"
	"log"
)

func main() {

    rectangle := "rectangle.png"

    rectImage := image.NewRGBA(image.Rect(0, 0, 200, 200))
    green := color.RGBA{0, 100, 0, 255}

    draw.Draw(rectImage, rectImage.Bounds(), &image.Uniform{green}, image.ZP, draw.Src)

    file, err := os.Create(rectangle)
	if err != nil {
		log.Fatalf("failed create file: %s", err)
	}
    png.Encode(file, rectImage)
}

Most Helpful This Week

How to kill execution of goroutine? How to reads and decodes JSON values from an input stream? How to check if a map contains a key in Go? Replace first occurrence of string using Regexp How to import and alias package names? Regular expression to extract numbers from a string in Golang Different ways to validate JSON string Example of Pointers with Struct Golang import package inside package Functions mess (recursive anonymous function) in Golang

Golang Tutorial

Golang Reference

Beego Framework

How to Draw a rectangle in Golang?

Example

Most Helpful This Week

Most Helpful This Week