41                         float start_angle,  in ArcTo()  argument
45                 new_size, start_angle, sweep_angle);  in ArcTo()
50                                 float start_angle,  in ArcToInternal()  argument
58   float sn = sin(start_angle + sweep_angle / 2);  in ArcToInternal()
59   float cs = cos(start_angle + sweep_angle / 2);  in ArcToInternal()
70   bezier.x = pos.x + (size.width * cos(start_angle + sweep_angle));  in ArcToInternal()
71   bezier.y = pos.y + (size.height * sin(start_angle + sweep_angle));  in ArcToInternal()
93                          float start_angle,  in AddArc()  argument
99   while (start_angle > FX_PI * 2)  in AddArc()
100     start_angle -= FX_PI * 2;  in AddArc()
101   while (start_angle < 0)  in AddArc()
102     start_angle += FX_PI * 2;  in AddArc()
110   data_.AppendPoint(pos + CFX_PointF(size.width * cos(start_angle),  in AddArc()
111                                      size.height * sin(start_angle)),  in AddArc()
137     ArcToInternal(pos, size, start_angle, local_sweep);  in AddArc()
138     start_angle += local_sweep;  in AddArc()