package main import ( "fmt" "time" "log" "os" "io/ioutil" "bufio" "strings" "image" "image/png" "draw2d.googlecode.com/hg/draw2d" "draw2d.googlecode.com/hg/postscript" ) func saveToPngFile(filePath string, m image.Image) { f, err := os.Create(filePath) 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(image.Rect(0, 0, 600, 800)) gc := draw2d.NewGraphicContext(i) gc.Translate(0, 380) gc.Scale(1, -1) gc.Translate(0, -380) src, err := os.OpenFile("../resource/postscript/tiger.ps", 0, 0) if err != nil { return } defer src.Close() bytes, err := ioutil.ReadAll(src) reader := strings.NewReader(string(bytes)) interpreter := postscript.NewInterpreter(gc) lastTime := time.Nanoseconds() interpreter.Execute(reader) dt := time.Nanoseconds() - lastTime fmt.Printf("Draw image: %f ms\n", float64(dt)*1e-6) saveToPngFile("../resource/result/TestPostscript.png", i) }