From 32e997346bb5766aefa6ef5f4caa189af128b498 Mon Sep 17 00:00:00 2001
From: Martin Ashby <martin@martin-laptop.lan>
Date: Mon, 21 May 2018 09:54:00 +0100
Subject: Moved unicorn lib to it's own package

---
 unicorn/Unicorn.go | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 unicorn/Unicorn.go

(limited to 'unicorn/Unicorn.go')

diff --git a/unicorn/Unicorn.go b/unicorn/Unicorn.go
new file mode 100644
index 0000000..09f712e
--- /dev/null
+++ b/unicorn/Unicorn.go
@@ -0,0 +1,73 @@
+package unicorn
+
+// Unicorn ...
+// Object representing the Unicorn HAT to be controlled
+type Unicorn interface {
+	// Not all unicorns are the same size
+	GetWidth() uint8
+	GetHeight() uint8
+
+	// Array of pixels, indexed x, then y, then color (rgb)
+	GetPixels() [][][]uint8
+
+	// Set an individual pixel
+	SetPixel(x, y, r, g, b uint8)
+
+	// Flip the display buffer
+	Show()
+
+	// Set all pixels back to black
+	Clear()
+
+	// Turns off the LEDs
+	Off()
+}
+
+// GetUnicorn ...
+// Get a unicorn. Get's a real on on ARM hardware,
+// get's a fake one on x86
+func GetUnicorn() (Unicorn, error) {
+	return NewUnicorn()
+}
+
+type BaseUnicorn struct {
+	pixels [][][]uint8
+}
+
+func (f *BaseUnicorn) GetWidth() uint8 {
+	return uint8(len(f.pixels))
+}
+
+func (f *BaseUnicorn) GetHeight() uint8 {
+	if len(f.pixels) > 0 {
+		return uint8(len(f.pixels[0]))
+	}
+	return 0
+}
+
+func (f *BaseUnicorn) GetPixels() [][][]uint8 {
+	return f.pixels
+}
+
+func (f *BaseUnicorn) SetPixel(x, y, r, g, b uint8) {
+	f.pixels[x][y] = []uint8{r, g, b}
+}
+
+func (f *BaseUnicorn) Clear() {
+	f.pixels = makePixels(f.GetWidth(), f.GetHeight())
+}
+
+func makePixels(width, height uint8) [][][]uint8 {
+	pixels := make([][][]uint8, width)
+	for x := uint8(0); x < width; x++ {
+		pixels[x] = make([][]uint8, height)
+		for y := uint8(0); y < height; y++ {
+			pixels[x][y] = []uint8{0, 0, 0}
+		}
+	}
+	return pixels
+}
+
+func rgb(pixel []uint8) (uint8, uint8, uint8) {
+	return pixel[0], pixel[1], pixel[2]
+}
-- 
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