42                         float start_angle,  in ArcTo()  argument
46                 new_size, start_angle, sweep_angle);  in ArcTo()
51                                 float start_angle,  in ArcToInternal()  argument
59   float sn = sin(start_angle + sweep_angle / 2);  in ArcToInternal()
60   float cs = cos(start_angle + sweep_angle / 2);  in ArcToInternal()
71   bezier.x = pos.x + (size.width * cos(start_angle + sweep_angle));  in ArcToInternal()
72   bezier.y = pos.y + (size.height * sin(start_angle + sweep_angle));  in ArcToInternal()
94                          float start_angle,  in AddArc()  argument
100   while (start_angle > FX_PI * 2)  in AddArc()
101     start_angle -= FX_PI * 2;  in AddArc()
102   while (start_angle < 0)  in AddArc()
103     start_angle += FX_PI * 2;  in AddArc()
111   data_.AppendPoint(pos + CFX_PointF(size.width * cos(start_angle),  in AddArc()
112                                      size.height * sin(start_angle)),  in AddArc()
138     ArcToInternal(pos, size, start_angle, local_sweep);  in AddArc()
139     start_angle += local_sweep;  in AddArc()