diff --git a/st7735/st7735.go b/st7735/st7735.go
index cd0f19d..5251f6e 100644
--- a/st7735/st7735.go
+++ b/st7735/st7735.go
@@ -16,6 +16,10 @@ import (
 type Model uint8
 type Rotation uint8
 
+var (
+	errOutOfBounds = errors.New("rectangle coordinates outside display area")
+)
+
 // Device wraps an SPI connection.
 type Device struct {
 	bus          drivers.SPI
@@ -274,6 +278,18 @@ func (d *Device) FillRectangle(x, y, width, height int16, c color.RGBA) error {
 	return nil
 }
 
+// DrawRGBBitmap8 copies an RGB bitmap to the internal buffer at given coordinates
+func (d *Device) DrawRGBBitmap8(x, y int16, data []uint8, w, h int16) error {
+	k, i := d.Size()
+	if x < 0 || y < 0 || w <= 0 || h <= 0 ||
+		x >= k || (x+w) > k || y >= i || (y+h) > i {
+		return errOutOfBounds
+	}
+	d.setWindow(x, y, w, h)
+	d.Tx(data, false)
+	return nil
+}
+
 // FillRectangle fills a rectangle at a given coordinates with a buffer
 func (d *Device) FillRectangleWithBuffer(x, y, width, height int16, buffer []color.RGBA) error {
 	k, l := d.Size()