/* * polytest - polygon fill test program for Nano-X */#include <stdio.h>#include <stdlib.h>#define MWINCLUDECOLORS#include "nano-X.h"static voiddraw(GR_EVENT * e){	GR_WINDOW_ID wid = ((GR_EVENT_EXPOSURE *)e)->wid;	GR_GC_ID gc = GrNewGC();	GR_POINT points[4];	int x = 10;	int y = 10;	int sz = 20;	int sz2 = 5;	GrSetGCBackground(gc, BLACK);	/* fill poly #1*/	points[0].x = x;	points[0].y = y;	points[1].x = x + sz;	points[1].y = y;	points[2].x = x + (sz / 2);	points[2].y = y + sz;	points[3].x = x;	points[3].y = y;	GrSetGCForeground(gc, WHITE);	GrFillPoly(wid, gc, 3, points);	/* outline poly #1*/	GrSetGCForeground(gc, GREEN);	GrPoly(wid, gc, 4, points);	/* fill poly #2*/	y += sz + 10;	points[0].x = x;	points[0].y = y;	points[1].x = x + sz + 1;	points[1].y = y;	points[2].x = x + (sz / 2);	points[2].y = y + sz;	points[3].x = x;	points[3].y = y;	GrSetGCForeground(gc, WHITE);	GrFillPoly(wid, gc, 3, points);	/* outline poly #2*/	GrSetGCForeground(gc, GREEN);	GrPoly(wid, gc, 4, points);	/* fill poly #3*/	y += sz + 10;	points[0].x = x;	points[0].y = y;	points[1].x = x + sz - 1;	points[1].y = y;	points[2].x = x + (sz / 2);	points[2].y = y + sz;	points[3].x = x;	points[3].y = y;	GrSetGCForeground(gc, WHITE);	GrFillPoly(wid, gc, 3, points);	/* outline poly #3*/	GrSetGCForeground(gc, GREEN);	GrPoly(wid, gc, 4, points);	/* fill right arrow #1*/	x = 60;	y = 60;	sz = 10;	sz2 = 8;	points[0].x = x;	points[0].y = y;	y -= sz;	points[1].x = x + sz2;	points[1].y = y;	y -= sz;	points[2].x = x;	points[2].y = y;	points[3].x = x;	points[3].y = 60;	GrSetGCForeground(gc, WHITE);	GrFillPoly(wid, gc, 3, points);	/* outline right arrow #1*/	GrSetGCForeground(gc, GREEN);	GrPoly(wid, gc, 4, points);	/* fill right arrow #2*/	x = 60;	y = 90;	points[0].x = x;	points[0].y = y;	y -= sz;	points[1].x = x + sz2;	points[1].y = y;	y -= sz;	points[2].x = x;	points[2].y = y;	points[3].x = x;	points[3].y = 90;	GrSetGCForeground(gc, WHITE);	GrFillPoly(wid, gc, 3, points);	/* concave polygon filling*/	{	static GR_POINT pt1[5] = {{10,120},{150,130},{120,220},{60,160},{15,200}};	static GR_POINT pt2[5] = {{10,220},{150,230},{120,320},{60,360},{15,300}}; 	/* concave poly fill #4 - fails with some algorithms*/	GrSetGCForeground(gc, WHITE);	GrFillPoly(wid,gc,5,pt1);	 	/* concave poly outline #4 - ok*/	GrSetGCForeground(gc, GREEN);	GrPoly(wid,gc,5,pt1);	/* convex poly fill #5 - ok*/	GrSetGCForeground(gc, WHITE);	GrFillPoly(wid,gc,5,pt2);	/* convex poly outline #5 - ok*/	GrSetGCForeground(gc, GREEN);	GrPoly(wid,gc,5,pt2);	}	GrDestroyGC(gc);}intmain(int ac, char **av){	GR_EVENT event;	GR_WINDOW_ID w;	if (GrOpen() < 0) {		fprintf(stderr, "cannot open graphics\n");		exit(1);	}	/* create window */	w = GrNewWindowEx(GR_WM_PROPS_NOAUTOMOVE | GR_WM_PROPS_BORDER |			      GR_WM_PROPS_CAPTION | GR_WM_PROPS_CLOSEBOX,			      "polydemo", GR_ROOT_WINDOW_ID, 			      10, 10, 220, 362, GR_RGB(0, 0, 0));	GrSelectEvents(w, GR_EVENT_MASK_EXPOSURE | GR_EVENT_MASK_CLOSE_REQ);	GrMapWindow(w);	while (1) {		GrGetNextEvent(&event);		switch (event.type) {		case GR_EVENT_TYPE_EXPOSURE:			draw(&event);			break;		case GR_EVENT_TYPE_CLOSE_REQ:			GrClose();			exit(0);		}	}}