void clearAndClip(vkvg.Context ctx)
{
ctx.ClipPreserve();
ctx.Operator = vkvg.Operator.Clear;
ctx.Fill();
ctx.Operator = vkvg.Operator.Over;
}
void recurseDraw(vkvg.Context ctx, int step)
{
step++;
ctx.SetSource(1.0, 0.0, 0.0);
ctx.FontFace = "droid";
ctx.FontSize = 10;
ctx.Save();
ctx.Translate(20, 20);
ctx.Rectangle(step, step, 600, 600);
ctx.ClipPreserve();
ctx.SetSource(1f / step, 1f / step, 1f / step);
ctx.FillPreserve();
ctx.SetSource(0, 0, 0);
ctx.Stroke();
if (step < 5)
{
recurseDraw(ctx, step);
}
ctx.Restore();
ctx.Rectangle(step + 50, step + 1, 100, 12);
ctx.Operator = vkvg.Operator.Clear;
ctx.Fill();
ctx.Operator = vkvg.Operator.Over;
ctx.SetSource(1.0, 0.0, 0.0);
ctx.MoveTo(step + 30, step + 12);
ctx.ShowText($"fps: {fps}");
ctx.Operator = vkvg.Operator.Clear;
ctx.Rectangle(step, step, 20, 20);
ctx.Fill();
ctx.Operator = vkvg.Operator.Over;
ctx.SetSource(1f / step, 0f, 0f);
ctx.Rectangle(step + 2, step + 2, 16, 16);
ctx.Fill();
}