test getting started

draw2d/src/cmd/gettingStarted.go

@@ -0,0 +1,44 @@
+package main
+
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"bufio"
+	
+	"image"
+	"image/png"
+	"draw2d"
+)
+
+func saveToPngFile(filePath string, m image.Image) {
+	f, err := os.Open(filePath, os.O_CREAT|os.O_WRONLY, 0600)
+	if err != nil {
+		log.Println(err)
+		os.Exit(1)
+	}
+	defer f.Close()
+	b := bufio.NewWriter(f)
+	err = png.Encode(b, m)
+	if err != nil {
+		log.Println(err)
+		os.Exit(1)
+	}
+	err = b.Flush()
+	if err != nil {
+		log.Println(err)
+		os.Exit(1)
+	}
+	fmt.Printf("Wrote %s OK.\n", filePath)
+}
+
+func main() {
+	i := image.NewRGBA(200, 200)
+	gc := draw2d.NewGraphicContext(i)
+	gc.MoveTo(10.0, 10.0)
+	gc.LineTo(100.0, 10.0)
+	gc.Stroke()
+	
+	saveToPngFile("../../TestPath.png", i)
+}