Dockerfile

@@ -7,6 +7,7 @@ RUN go mod tidy
 RUN go build .
 RUN mkdir -p /usr/src/app/work/ 
 RUN cp /usr/src/app/rgb/rgb /usr/src/app/work/rgb
+RUN cp /usr/src/app/rgb/mario* /usr/src/app/work/
 
 #FROM alpine:latest
 

main.go

@@ -4,9 +4,13 @@ import (
 	"flag"
 	"image"
 	"image/color"
+	_ "image/jpeg"
+	"log"
+	"os"
 	"time"
 
 	rgbmatrix "gitea.wagshome.duckdns.org/publicWagsHome/go-rpi-rgb-led-matrix"
+	"github.com/disintegration/imaging"
 	"github.com/fogleman/gg"
 )
 
@@ -34,6 +38,19 @@ func main() {
 	config.InverseColors = *inverse_colors
 	config.DisableHardwarePulsing = *disable_hardware_pulsing
 
+	/*bounds := mario.Bounds()
+	var histogram [16][4]int
+	for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
+		for x := bounds.Min.X; x < bounds.Max.X; x++ {
+			r, g, b, a := mario.At(x, y).RGBA()
+			// A color's RGBA method returns values in the range [0, 65535].
+			// Shifting by 12 reduces this to the range [0, 15].
+			histogram[r>>12][0]++
+			histogram[g>>12][1]++
+			histogram[b>>12][2]++
+			histogram[a>>12][3]++
+		}
+	}*/
 	m, err := rgbmatrix.NewRGBLedMatrix(config)
 	fatal(err)
 
@@ -57,25 +74,37 @@ type Animation struct {
 	ctx      *gg.Context
 	position image.Point
 	dir      image.Point
+	height   int
+	width    int
 	stroke   int
+	image    image.Image
 }
 
 func NewAnimation(sz image.Point) *Animation {
+	reader, err := os.Open("mario.jpg")
+	if err != nil {
+		log.Fatal(err)
+	}
+	rawMario, _, err := image.Decode(reader)
+	mario := imaging.FlipH(imaging.Resize(rawMario, 16, 16, imaging.Lanczos))
 	return &Animation{
 		ctx:    gg.NewContext(sz.X, sz.Y),
 		dir:    image.Point{1, 1},
-		stroke: 5,
+		height: 8,
+		width:  8,
+		stroke: 16,
+		image:  mario,
 	}
 }
 
 func (a *Animation) Next() (image.Image, <-chan time.Time, error) {
 	defer a.updatePosition()
-
 	a.ctx.SetColor(color.Black)
 	a.ctx.Clear()
-
-	a.ctx.DrawCircle(float64(a.position.X), float64(a.position.Y), float64(a.stroke))
-	a.ctx.SetColor(color.RGBA{0, 255, 0, 255})
+	a.ctx.DrawImageAnchored(a.image, a.position.X, a.position.Y, 0.5, 0.5)
+	//a.image = imaging.FlipH(a.image)
+	//a.ctx.DrawCircle(float64(a.position.X), float64(a.position.Y), float64(a.stroke))
+	//a.ctx.SetColor(color.RGBA{0, 255, 0, 255})
 	a.ctx.Fill()
 	return a.ctx.Image(), time.After(time.Millisecond * 50), nil
 }
@@ -84,15 +113,17 @@ func (a *Animation) updatePosition() {
 	a.position.X += 1 * a.dir.X
 	a.position.Y += 1 * a.dir.Y
 
-	if a.position.Y+a.stroke > a.ctx.Height() {
+	if a.position.Y+a.height > a.ctx.Height() {
 		a.dir.Y = -1
-	} else if a.position.Y-a.stroke < 0 {
+	} else if a.position.Y-a.height < 0 {
 		a.dir.Y = 1
 	}
 
-	if a.position.X+a.stroke > a.ctx.Width() {
+	if a.position.X+a.width > a.ctx.Width() {
 		a.dir.X = -1
-	} else if a.position.X-a.stroke < 0 {
+		a.image = imaging.FlipH(a.image)
+	} else if a.position.X-a.width < 0 {
 		a.dir.X = 1
+		a.image = imaging.FlipH(a.image)
 	}
 }