func DrawTiger(gc draw2d.GraphicContext) {
if postscriptContent == "" {
src, err := os.OpenFile("../../resource/postscript/tiger.ps", 0, 0)
if err != nil {
fmt.Println("can't find postscript file.")
return
}
defer src.Close()
bytes, err := ioutil.ReadAll(src)
postscriptContent = string(bytes)
}
interpreter := postscript.NewInterpreter(gc)
reader := strings.NewReader(postscriptContent)
interpreter.Execute(reader)
}
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)
interpreter.Execute(reader)
saveToPngFile("../resource/result/TestPostscript.png", i)
}
func display() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.LineWidth(1)
gc := draw2dgl.NewGraphicContext(width, height)
gc.Translate(380, 400)
gc.Scale(1, -1)
rotate = (rotate + 1) % 360
gc.Rotate(float64(rotate) * math.Pi / 180)
gc.Translate(-380, -400)
interpreter := postscript.NewInterpreter(gc)
reader := strings.NewReader(postscriptContent)
lastTime := time.Now()
interpreter.Execute(reader)
dt := time.Now().Sub(lastTime)
log.Printf("Redraw in : %f ms\n", float64(dt)*1e-6)
gl.Flush() /* Single buffered, so needs a flush. */
glut.PostRedisplay()
}