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/FakeUnicorn.go | 98 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 unicorn/FakeUnicorn.go

(limited to 'unicorn/FakeUnicorn.go')

diff --git a/unicorn/FakeUnicorn.go b/unicorn/FakeUnicorn.go
new file mode 100644
index 0000000..3236842
--- /dev/null
+++ b/unicorn/FakeUnicorn.go
@@ -0,0 +1,98 @@
+// +build linux,386 linux,amd64
+
+package unicorn
+
+import (
+	"github.com/veandco/go-sdl2/sdl"
+)
+
+type FakeUnicorn struct {
+	BaseUnicorn
+	displayWidth  int32
+	displayHeight int32
+	window        *sdl.Window
+	renderer      *sdl.Renderer
+}
+
+// NewUnicorn ...
+// Constructs a new fake unicorn out of paint and glue
+func NewUnicorn() (*FakeUnicorn, error) {
+	width := uint8(16)
+	height := uint8(16)
+	if err := sdl.Init(sdl.INIT_EVERYTHING); err != nil {
+		return nil, err
+	}
+
+	unicorn := &FakeUnicorn{
+		BaseUnicorn{
+			pixels: makePixels(width, height),
+		},
+		300,
+		300,
+		nil,
+		nil,
+	}
+	if err := unicorn.createWindow(); err != nil {
+		unicorn.Close()
+		return nil, err
+	}
+	if err := unicorn.createRenderer(); err != nil {
+		unicorn.Close()
+		return nil, err
+	}
+	return unicorn, nil
+}
+
+func (f *FakeUnicorn) createWindow() error {
+	window, err := sdl.CreateWindow("Fake Unicorn",
+		sdl.WINDOWPOS_UNDEFINED,
+		sdl.WINDOWPOS_UNDEFINED,
+		f.displayWidth,
+		f.displayHeight,
+		sdl.WINDOW_SHOWN)
+	f.window = window
+	return err
+}
+
+func (f *FakeUnicorn) createRenderer() error {
+	renderer, err := sdl.CreateRenderer(f.window, -1, sdl.RENDERER_ACCELERATED)
+	f.renderer = renderer
+	return err
+}
+
+func (f *FakeUnicorn) Close() error {
+	if f.window != nil {
+		f.window.Destroy()
+	}
+	if f.renderer != nil {
+		f.renderer.Destroy()
+	}
+	return nil
+}
+
+func (f *FakeUnicorn) Show() {
+	width, height := f.GetWidth(), f.GetHeight()
+	for x := uint8(0); x < width; x++ {
+		for y := uint8(0); y < height; y++ {
+			r, g, b := rgb(f.pixels[x][y])
+			if err := f.renderer.SetDrawColor(r, g, b, uint8(255)); err != nil {
+				panic(err)
+			}
+			cellWidth := f.displayWidth / int32(width)
+			cellHeight := f.displayHeight / int32(height)
+			if err := f.renderer.FillRect(&sdl.Rect{
+				X: cellWidth * int32(x),
+				Y: f.displayHeight - (cellHeight * int32(y)) - cellHeight, // SDL Y coordinate is from the top
+				W: cellWidth,
+				H: cellHeight,
+			}); err != nil {
+				panic(err)
+			}
+		}
+	}
+	f.renderer.Present()
+}
+
+func (f *FakeUnicorn) Off() {
+	f.Close()
+}
-- 
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