xref: /plan9/sys/src/cmd/plot/libplot/sbox.c (revision 3e12c5d1bb89fc02707907988834ef147769ddaf)
1 #include "mplot.h"
sbox(double xx0,double yy0,double xx1,double yy1)2 void sbox(double xx0, double yy0, double xx1, double yy1){
3 	int x0=SCX(xx0), y0=SCY(yy0), x1=SCX(xx1), y1=SCY(yy1);
4 	int t;
5 	if(x1<x0){ t=x0; x0=x1; x1=t; }
6 	if(y1<y0){ t=y0; y0=y1; y1=t; }
7 	if(x0<clipminx) x0=clipminx;
8 	if(y0<clipminy) y0=clipminy;
9 	if(x1>clipmaxx) x1=clipmaxx;
10 	if(y1>clipmaxy) y1=clipmaxy;
11 	if(x1<x0 || y1<y0) return;
12 	m_clrwin(x0, y0, x1, y1, e1->backgr);
13 }
14