waveshare2in13v2

// Make sure periph is initialized.
if _, err := host.Init(); err != nil {
	log.Fatal(err)
}

// Use spireg SPI bus registry to find the first available SPI bus.
b, err := spireg.Open("")
if err != nil {
	log.Fatal(err)
}
defer b.Close()

dev, err := waveshare2in13v2.NewHat(b, &waveshare2in13v2.EPD2in13v2) // Display config and size
if err != nil {
	log.Fatalf("failed to initialize epd: %v", err)
}

// Draw on it. Black text on a white background.
img := image1bit.NewVerticalLSB(dev.Bounds())
draw.Draw(img, img.Bounds(), &image.Uniform{image1bit.On}, image.Point{}, draw.Src)
f := basicfont.Face7x13
drawer := font.Drawer{
	Dst:  img,
	Src:  &image.Uniform{image1bit.Off},
	Face: f,
	Dot:  fixed.P(0, img.Bounds().Dy()-1-f.Descent),
}
drawer.DrawString("Hello from periph!")

if err := dev.Draw(dev.Bounds(), img, image.Point{}); err != nil {
	log.Fatal(err)
}

Output:

// Make sure periph is initialized.
if _, err := host.Init(); err != nil {
	log.Fatal(err)
}

// Use spireg SPI bus registry to find the first available SPI bus.
b, err := spireg.Open("")
if err != nil {
	log.Fatal(err)
}
defer b.Close()

dev, err := waveshare2in13v2.NewHat(b, &waveshare2in13v2.EPD2in13v2) // Display config and size
if err != nil {
	log.Fatalf("failed to initialize epd: %v", err)
}

var img image.Image
bounds := dev.Bounds()
w := bounds.Dx()
h := bounds.Dy()
dc := gg.NewContext(w, h)
im, err := gg.LoadPNG("gopher.png")
if err != nil {
	panic(err)
}
dc.SetRGB(1, 1, 1)
dc.Clear()
dc.SetRGB(0, 0, 0)
dc.Rotate(gg.Radians(90))
dc.Translate(0.0, -float64(h/2))
font, err := truetype.Parse(goregular.TTF)
if err != nil {
	panic(err)
}
face := truetype.NewFace(font, &truetype.Options{
	Size: 16,
})
dc.SetFontFace(face)
text := "Hello from periph!"
tw, th := dc.MeasureString(text)
dc.DrawImage(im, 120, 30)
padding := 8.0
dc.DrawRoundedRectangle(padding*2, padding*2, tw+padding*2, th+padding, 10)
dc.Stroke()
dc.DrawString(text, padding*3, padding*2+th)
for i := 0; i < 10; i++ {
	dc.DrawCircle(float64(30+(10*i)), 100, 5)
}
for i := 0; i < 10; i++ {
	dc.DrawRectangle(float64(30+(10*i)), 80, 5, 5)
}
dc.Fill()
img = dc.Image()

if err := dev.Draw(dev.Bounds(), img, image.Point{}); err != nil {
	log.Fatal(err)
}

Output: