#include <cmath>

#include "activepoint.h"

#include "context.h"


Real Context::pixelsize_sqr() const {
	Cairo::Matrix m;
	ctx()->get_matrix(m);
	return 0.25*sqrt(m.xx*m.xx + m.xy*m.xy + m.yx*m.yx + m.yy*m.yy);
}

Real Context::pixelsize() const {
	return sqrt(pixelsize_sqr());
}

void Context::point(const ActivePoint &point) const {
	if (!point.visible) return;

	Color color = point.color;
	Color stroke_color = Color::black();
	if (!point.enabled) {
		color = color.mergecolor(Color::gray()).mulalpha();
		stroke_color = stroke_color.mergecolor(Color::gray()).mulalpha();
	}

	ctx()->save();
	ctx()->arc(point.position.x, point.position.y, point.radius, 0, 2*pi);
	set_source_rgba(color);
	ctx()->fill_preserve();
	set_line_width_px(point.active ? 2 : 1);
	set_source_rgba(stroke_color);
	ctx()->stroke();

	ctx()->restore();
}

void Context::bezier(const Bezier &bezier, bool jump) const {
	if (jump) move_to(bezier.p0); else line_to(bezier.p0);
	ctx()->curve_to(bezier.pp0.x, bezier.pp0.y, bezier.pp1.x, bezier.pp1.y, bezier.p1.x, bezier.p1.y);
}