From 4ec7e493520d558dd05e911b58ea354d25f33f45 Mon Sep 17 00:00:00 2001
From: Martin Ashby <martin@martin-laptop.lan>
Date: Mon, 28 May 2018 11:40:30 +0100
Subject: Started animated implementation

---
 MakeGif.go | 106 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 MakeGif.go

(limited to 'MakeGif.go')

diff --git a/MakeGif.go b/MakeGif.go
new file mode 100644
index 0000000..3119b94
--- /dev/null
+++ b/MakeGif.go
@@ -0,0 +1,106 @@
+package main
+
+import (
+	"encoding/json"
+	"image"
+	"image/color"
+	"image/color/palette"
+	"image/draw"
+	"image/gif"
+	"io/ioutil"
+	"time"
+
+	"github.com/MFAshby/unicornpaint/unicorn"
+)
+
+var (
+	un unicorn.Unicorn
+)
+
+func imageFromPixels(pixels [][][]uint8) image.Image {
+	width := len(pixels)
+	height := len(pixels[0])
+	im1 := image.NewRGBA(image.Rect(0, 0, width, height))
+	for x := 0; x < width; x++ {
+		for y := 0; y < height; y++ {
+			r, g, b := unicorn.Rgb(pixels[x][y])
+			col := color.RGBA{
+				R: r,
+				G: g,
+				B: b,
+				A: 100,
+			}
+			im1.Set(x, y, col)
+		}
+	}
+	return im1
+}
+
+func toPaletted(im image.Image) *image.Paletted {
+	b := im.Bounds()
+	pm := image.NewPaletted(b, palette.Plan9[:256])
+	draw.FloydSteinberg.Draw(pm, b, im, image.ZP)
+	return pm
+}
+
+var (
+	stop bool
+)
+
+func renderImage(un unicorn.Unicorn, im image.Image) {
+	b := im.Bounds()
+	width := b.Dx()
+	height := b.Dy()
+	for x := 0; x < width; x++ {
+		for y := 0; y < height; y++ {
+			r, g, b, _ := im.At(x, y).RGBA()
+			un.SetPixel(uint8(x), uint8(y), uint8(r), uint8(g), uint8(b))
+		}
+	}
+	un.Show()
+}
+
+func renderGif(un unicorn.Unicorn, gf *gif.GIF) {
+	for !stop {
+		for i := 0; i < len(gf.Image); i++ {
+			im := gf.Image[i]
+			delay := gf.Delay[i] //100ths of a second
+			renderImage(un, im)
+			time.Sleep(time.Duration(delay * 10000000)) // nanoseconds 10^-9 sec
+		}
+	}
+}
+
+func main() {
+	b1, _ := ioutil.ReadFile("saves/modern")
+	b2, _ := ioutil.ReadFile("saves/modern2")
+
+	px1 := [][][]uint8{}
+	json.Unmarshal(b1, &px1)
+	px2 := [][][]uint8{}
+	json.Unmarshal(b2, &px2)
+
+	im1 := toPaletted(imageFromPixels(px1))
+	im2 := toPaletted(imageFromPixels(px2))
+
+	gf := &gif.GIF{
+		Image: []*image.Paletted{im1, im2},
+		Delay: []int{50, 50}, // 100ths of a second
+	}
+
+	// f1, err := os.Create("saves/modern.gif")
+	// if err != nil {
+	// 	log.Fatalf("Error opening GIF file to write %v", err)
+	// }
+	// defer f1.Close()
+	// err = gif.EncodeAll(f1, gf)
+	// if err != nil {
+	// 	log.Printf("Error writing GIF %v", err)
+	// }
+
+	un, _ = unicorn.NewUnicorn()
+
+	go renderGif(un, gf)
+
+	un.MainLoop()
+}
-- 
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