How to load an inlined SVG in Go using GOTK3 and librsvg?

I work on an application written in Go. It uses GOTK3, librsvg is installed, and I can create (and then display) SVG images using gtk.ImageNewFromFile(file-path-to-svg).

Now I would like to programmatically create an image from an SVG that's inlined within the source code... something like this:

color := "#FF0000"
redSvg := 
  "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" +
  "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n" +
  "<svg version=\"1.1\" id=\"Layer_1\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" x=\"0px\" y=\"0px\" width=\"32px\" height=\"32px\" viewBox=\"0 0 32 32\" enable-background=\"new 0 0 32 32\" xml:space=\"preserve\">\n" +
  "    <rect fill=\"" + color + "\" width=\"32\" height=\"32\"/>\n" +
  "</svg>"

image, err := ImageNewFromSvg(redSvg)
.
.
.


func ImageNewFromSvg(svg string) (*gtk.Image, error) {
  ?
}

...and I need some help with the implementation of ImageNewFromSvg(). gotk3 doesn't have an ImageNewFromSvg() API, but it does have ImageNewFromPixbuf().

I've tried to implement the creation of a pixbuf from a string (with SVG markup), but I haven't been able to do so.

Is it possible to create an image from an inlined SVG, defined within the source code? If so, what would the implementation of ImageNewFromSvg() be?

You can load inlined SVG with gdk.PixbufNewFromDataOnly through passing your svg string as slice of bytes to it then getting pixbuf from it and putting it to gtk.ImageNewFromPixbuf to get *gtk.Image to use it in your window.
And here is one of correct implementation of your mentioned ImageNewFromSvg function:

func ImageNewFromSvg(svg string) (*gtk.Image, error){
  pixbuf, err := gdk.PixbufNewFromDataOnly([]byte(svg))
  if err !=  nil {
  	return nil, err
  }
  
  img, err := gtk.ImageNewFromPixbuf(pixbuf)
  
  if err !=  nil {
  	return nil, err
  }
  
  return img, nil
}

Example usage in actual gtk program:

package main

import (
	"log"

	"github.com/gotk3/gotk3/gtk"
	"github.com/gotk3/gotk3/gdk"
)

func main() {
	gtk.Init(nil)

	win, err := gtk.WindowNew(gtk.WINDOW_TOPLEVEL)
	if err != nil {
		log.Fatal("Unable to create window:", err)
	}
	win.SetTitle("Svg Example")
	win.Connect("destroy", func() {
		gtk.MainQuit()
	})


	color := "#FF0000"
	svgdata := "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" +
 			   "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n" +
               "<svg version=\"1.1\" id=\"Layer_1\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" x=\"0px\" y=\"0px\" width=\"32px\" height=\"32px\" viewBox=\"0 0 32 32\" enable-background=\"new 0 0 32 32\" xml:space=\"preserve\">\n" +
               "    <rect fill=\"" + color + "\" width=\"32\" height=\"32\"/>\n" +
               "</svg>"

	svgImage, err  := ImageNewFromSvg(svgdata)
	
	if err != nil {
		log.Fatal(err)
	}
	
	win.Add(svgImage)
	win.ShowAll()


	gtk.Main()
}  

func ImageNewFromSvg(svg string) (*gtk.Image, error){
  pixbuf, err := gdk.PixbufNewFromDataOnly([]byte(svg))
  if err !=  nil {
  	return nil, err
  }
  
  img, err := gtk.ImageNewFromPixbuf(pixbuf)
  
  if err !=  nil {
  	return nil, err
  }
  
  return img, nil
}

And output: