Data commit

Task/Draw-a-pixel/Go/draw-a-pixel-1.go

@@ -0,0 +1,28 @@
+package main
+
+import (
+    "fmt"
+    "image"
+    "image/color"
+    "image/draw"
+)
+
+func main() {
+    rect := image.Rect(0, 0, 320, 240)
+    img := image.NewRGBA(rect)
+
+    // Use green background, say.
+    green := color.RGBA{0, 255, 0, 255}
+    draw.Draw(img, rect, &image.Uniform{green}, image.ZP, draw.Src)
+
+    // Set color of pixel at (100, 100) to red
+    red := color.RGBA{255, 0, 0, 255}
+    img.Set(100, 100, red)
+
+    // Check it worked.
+    cmap := map[color.Color]string{green: "green", red: "red"}
+    c1 := img.At(0, 0)
+    c2 := img.At(100, 100)
+    fmt.Println("The color of the pixel at (  0,   0) is", cmap[c1], "\b.")
+    fmt.Println("The color of the pixel at (100, 100) is", cmap[c2], "\b.")
+}

Task/Draw-a-pixel/Go/draw-a-pixel-2.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"image"
+	"image/color"
+	"image/draw"
+	"image/png"
+	"os"
+)
+
+func main() {
+	// Create a 320 x 240 image
+	img := image.NewRGBA(image.Rect(0, 0, 320, 240))
+	// fill img in white
+	draw.Draw(img, img.Bounds(), &image.Uniform{color.RGBA{0, 0, 0, 0}}, image.ZP, draw.Src)
+	// Draw a red dot at (100, 100)
+	img.Set(100, 100, color.RGBA{255, 0, 0, 255})
+	// Save to new.png
+	w, _ := os.OpenFile("new.png", os.O_WRONLY|os.O_CREATE, 0600)
+	defer w.Close()
+	png.Encode(w, img)
+}

Task/Draw-a-pixel/Go/draw-a-pixel-3.go

@@ -0,0 +1,10 @@
+package main
+// first run" go get github.com/zserge/webview"
+// simple GUI "window"
+import "github.com/zserge/webview"
+
+func main() {
+	// Open wikipedia in a 320*240 resizable window
+	webview.Open("Minimal webview example",
+		"https://en.m.wikipedia.org/wiki/Main_Page", 320, 240, true)
+}