func main() { file, err := os.Open("android.png") if err != nil { log.Fatal(err) } defer file.Close() a, _, err := image.Decode(file) //load go icon image file2, err := os.Open("go.png") if err != nil { log.Fatal(err) } defer file2.Close() g, _, err := image.Decode(file2) if err != nil { log.Fatal(err) } ar := a.Bounds() w, h, x := ar.Dx(), ar.Dy(), 30.0 i := image.NewRGBA(image.Rect(0, 0, w, h)) draw.Draw(i, ar, a, ar.Min, draw.Src) tr := draw2d.NewRotationMatrix(x * (math.Pi / 180.0)) draw2d.DrawImage(g, i, tr, draw.Over, draw2d.LinearFilter) saveToPngFile("Test2.png", i) }
func rotate(interpreter *Interpreter) { value := interpreter.Pop() matrix, ok := value.(draw2d.MatrixTransform) var angle float64 if !ok { matrix = interpreter.GetGraphicContext().GetMatrixTransform() angle = value.(float64) * math.Pi / 180 } else { angle = interpreter.PopFloat() * math.Pi / 180 } if !ok { interpreter.GetGraphicContext().Rotate(angle) } else { matrix = draw2d.NewRotationMatrix(angle).Multiply(matrix) interpreter.Push(matrix) } }