#include <u.h>
#include <libc.h>
#include <draw.h>
#include <event.h>
#include <keyboard.h>

Image	*background;

void
dodraw()
{
	int n = 4;
	int h, w, pn, qn;
	Point p[4], q[4];
	Point **pp;
	Point **qq;
	Image* color;

	w = screen->r.max.x - screen->r.min.x;
	h = screen->r.max.y - screen->r.min.y;

	p[0] = Pt(screen->r.min.x, screen->r.min.y + w*0.5);
	p[1] = Pt(screen->r.min.x + w*0.3, screen->r.min.y + h*0.4);
	p[2] = Pt(screen->r.min.x + w*0.7, screen->r.min.y + h*0.3);
	p[3] = Pt(screen->r.max.x, screen->r.min.y + w*0.2);

	q[3] = Pt(screen->r.min.x, screen->r.min.y + w*0.9);
	q[2] = Pt(screen->r.min.x + w*0.3, screen->r.min.y + h*0.6);
	q[1] = Pt(screen->r.min.x + w*0.7, screen->r.min.y + h*0.4);
	q[0] = Pt(screen->r.max.x, screen->r.min.y + w*0.25);

	draw(screen, screen->r, background, nil, ZP);

//	bezspline(screen, p, n, Enddisc, Enddisc, 4, display->black, ZP);
//	bezspline(screen, q, n, Enddisc, Enddisc, 4, display->black, ZP);

	/* Not sure how big to make these until after bezsplinepts. */
	pp = malloc(4096);
	qq = malloc(4096);

	pn = bezsplinepts(p, n, pp);
	qn = bezsplinepts(q, n, qq);

	color = allocimagemix(display, DPalebluegreen, DBluegreen);
	Point *z = malloc((pn + qn) * sizeof(Point));
	memcpy(z, *pp, pn * sizeof(Point));
	memcpy(z+pn, *qq, qn * sizeof(Point));
	poly(screen, z, pn+qn, Enddisc, Enddisc, 5, color, ZP);
	fillpoly(screen, z, pn+qn, ~0, allocimagemix(display, DBluegreen, DWhite), ZP);

}

void
eresized(int new)
{
	dodraw();
	flushimage(display, 1);
}

void
main(int argc, char *argv[])
{
	Event e;

	ARGBEGIN {
	} ARGEND

	initdraw(nil, nil, argv0);
	background = allocimagemix(display, DWhite, 0xFFEEFFFF);
	einit(Ekeyboard|Emouse);

	dodraw();
	flushimage(display, 1);
	for (;;) {
		switch(event(&e)) {
			case Ekeyboard:
				if(e.kbdc==0x7F || e.kbdc=='q')
					exits(0);
				dodraw();
// print("int:%d	char:%c\n", e.kbdc, e.kbdc);
				break;
			case Emouse:
				if(e.mouse.buttons)
					dodraw();
				break;
		}
	}
}