text: #include "ComposeRender.h"
  
  #include "effects/SkDiscretePathEffect.h"
  #include "effects/SkDashPathEffect.h"
  static SkPath star() {
      const SkScalar R = 115.2f, C = 128.0f;
      SkPath path;
      path.moveTo(C + R, C);
      for (int i = 1; i < 8; ++i) {
          SkScalar a = 2.6927937f * i;
          path.lineTo(C + R * cos(a), C + R * sin(a));
      }
      return path;
  }
  
  void ComposeRender::draw(SkCanvas *canvas, int elapsed, int w, int h)
  {
  
      canvas->clear(SK_ColorWHITE);
  
      canvas->drawPath(path, paint);
      canvas->flush();
  }
  
  void ComposeRender::init(int w, int h)
  {
      const SkScalar intervals[] = { 10.0f, 5.0f, 2.0f, 5.0f };
      size_t count  = sizeof(intervals) / sizeof(intervals[0]);
      paint.setPathEffect(SkPathEffect::MakeCompose(
          SkDashPathEffect::Make(intervals, count, 0.0f),
          SkDiscretePathEffect::Make(10.0f, 4.0f)
          ));
      paint.setStyle(SkPaint::kStroke_Style);
      paint.setStrokeWidth(2.0f);
      paint.setAntiAlias(true);
      paint.setColor(0xff4285F4);
  
      path = star();
  }
  
  void ComposeRender::resize(int w, int h)
  {
  }
  