From 3276ff864a4048a05ad3f0b34953ce937be1500c Mon Sep 17 00:00:00 2001
From: Martin Lehoux <martin@lehoux.net>
Date: Sat, 4 Apr 2020 13:28:28 -0700
Subject: feat - Save frame to file

---
 image.go | 26 ++++++++++++++++++++++++++
 main.go  | 18 ++++++++++++++++++
 2 files changed, 44 insertions(+)
 create mode 100644 image.go
 create mode 100644 main.go

diff --git a/image.go b/image.go
new file mode 100644
index 0000000..fe9b67f
--- /dev/null
+++ b/image.go
@@ -0,0 +1,26 @@
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+type Pixel struct {
+	r, g, b int
+}
+
+type Frame [HEIGHT][WIDTH]Pixel
+
+func (frame Frame) Save(filename string) {
+	f, err := os.Create(filename)
+	if err != nil {
+		panic(nil)
+	}
+	defer f.Close()
+	f.WriteString(fmt.Sprintf("P3\n%d %d\n255\n", WIDTH, HEIGHT))
+	for _, row := range frame {
+		for _, pixel := range row {
+			f.WriteString(fmt.Sprintf("%d %d %d ", pixel.r, pixel.g, pixel.b))
+		}
+	}
+}
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..f8245a4
--- /dev/null
+++ b/main.go
@@ -0,0 +1,18 @@
+package main
+
+const HEIGHT = 100
+const WIDTH = 200
+
+func main() {
+	frame := Frame{}
+	for x := 0; x < HEIGHT; x++ {
+		for y := 0; y < WIDTH; y++ {
+			frame[HEIGHT-1-x][y] = Pixel{
+				r: 255 * y / WIDTH,
+				g: 255 * x / HEIGHT,
+				b: 255 * 0.2,
+			}
+		}
+	}
+	frame.Save("img.ppm")
+}
-- 
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