#include <display.h>

void drect(display_t *disp, int x, int y, int width, int height)
{
	if (x < 0)
	{
		width = width + x;
		x = 0;
	} else {
		if (x + width >= (int)disp->display.width)
			width = disp->display.width - x;
	}

	// Get "real" Y position and area height.
	if (y < 0)
	{
		height = height + y;
		y = 0;
	} else {
		if (y + height >= (int)disp->display.height)
			height = disp->display.height - y;
	}

	// Check potential error.
	// @note we do not check height because the while()
	// while do the job for us.
	if (width < 0 || height < 0)
		return;

	// Draw the two horizontal lines
	dhline(disp, x, y, width);
	dhline(disp, x, y + height, width);

	// Draw th two vertical line
	dvline(disp, x, y, height);
	dvline(disp, x + width, y, height);
}