trying to do image work

main.go

@@ -1,6 +1,9 @@
 package main
 
 import (
+	"bytes"
+	b64 "encoding/base64"
+	"encoding/json"
 	"flag"
 	"fmt"
 	"image"
@@ -21,6 +24,10 @@ import (
 
 //  contents of struct mostly don't matter for toolkit.
 
+type incomingImage struct {
+	Image string `json:"image"`
+}
+
 type Animation struct {
 	ctx      *gg.Context
 	position image.Point
@@ -133,6 +140,7 @@ func NewAnimation(sz image.Point, mqMessages chan mqtt.Message) *Animation {
 
 // what happens each frame, at an interval of 50 milliseconds
 func (a *Animation) Next() (image.Image, <-chan time.Time, error) {
+	incoming := incomingImage{}
 	defer a.updatePosition()
 	a.ctx.SetColor(color.Black)
 	a.ctx.Clear()
@@ -144,10 +152,18 @@ func (a *Animation) Next() (image.Image, <-chan time.Time, error) {
 	a.ctx.SetColor(color.White)
 	select {
 	case msg := <-a.mqmsg:
-		a.msg = string(msg.Payload())
+		json.Unmarshal([]byte(string(msg.Payload())), &incoming)
+		if incoming.Image == "" {
+			a.msg = string(msg.Payload())
+			a.ctx.DrawString(a.msg, 5, 9)
+		} else {
+			baseImage, _ := b64.StdEncoding.DecodeString(incoming.Image)
+			bigImage, _, _ := image.Decode(bytes.NewReader(baseImage))
+			littleImage := imaging.Resize(bigImage, 32, 32, imaging.Lanczos)
+			a.ctx.DrawImageAnchored(littleImage, 0, 0, 0, 0)
+		}
 	default:
 	}
-	a.ctx.DrawString(a.msg, 5, 9)
 	return a.ctx.Image(), time.After(time.Millisecond * 50), nil
 }
 
@@ -194,9 +210,9 @@ func main() {
 	log.Println("making animator")
 	go animator(tk, mqMessages)
 	log.Println("I guess I'm at the end")
-	sigs := make(chan os.Signal, -1)
+	sigs := make(chan os.Signal, 1)
 	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
-	done := make(chan bool, -1)
+	done := make(chan bool, 1)
 	go func() {
 		sig := <-sigs
 		fmt.Println()