ref: 2cbd4b6dfcb79a7a3ddb3f2f01f745a0f2d3a506 dir: /sys/src/cmd/plot/libplot/erase.c/
#include "mplot.h" void erase(void){ m_swapbuf(); m_clrwin(clipminx, clipminy, clipmaxx, clipmaxy, e1->backgr); }