SVG to PNG Converter in Go

main.go

// This Go utility function, svgToPng, converts an SVG file into a PNG image with a 
// specified width and height. It leverages the oksvg and rasterx libraries to parse 
// and render the SVG before encoding it as a PNG. 
// The script ensures proper file handling and error management, making it a reusable 
// and efficient solution for SVG-to-PNG conversion. 
// The main function provides an example usage, converting pb_mono.svg into out.png at 512x512 resolution.

package main

import (
	"image"
	"image/png"
	"os"

	"github.com/srwiley/oksvg"
	"github.com/srwiley/rasterx"
)

// svgToPng converts an SVG file to a PNG file with the specified width and height.
func svgToPng(inputFile, outputFile string, width, height int) error {
	in, err := os.Open(inputFile)
	if err != nil {
		return err
	}
	defer in.Close()

	icon, err := oksvg.ReadIconStream(in)
	if err != nil {
		return err
	}
	icon.SetTarget(0, 0, float64(width), float64(height))
	rgba := image.NewRGBA(image.Rect(0, 0, width, height))
	icon.Draw(rasterx.NewDasher(width, height, rasterx.NewScannerGV(width, height, rgba, rgba.Bounds())), 1)

	out, err := os.Create(outputFile)
	if err != nil {
		return err
	}
	defer out.Close()

	return png.Encode(out, rgba)
}

func main() {
	if err := svgToPng("in.svg", "out.png", 512, 512); err != nil {
		panic(err)
	}
}