void retrace_call_glx(Trace::Call &call);
void retrace_call_wgl(Trace::Call &call);
void snapshot(unsigned call_no);
void frame_complete(unsigned call_no);
void retrace_call_glx(Trace::Call &call);
void retrace_call_wgl(Trace::Call &call);
void snapshot(unsigned call_no);
void frame_complete(unsigned call_no);