/*
 * $Header: /cvs/tuxbox/apps/tuxbox/neutrino/src/driver/screen_max.cpp,v 1.4 2009/12/15 09:42:59 dbt Exp $
 *
 * -- some odd module to calc max. screen usage of an menue
 * -- this should be somewhere else (neutrino needs redesign)
 *
 * (C) 2004 by  rasc
 *
 *
 */

#include <global.h>
#include <driver/screen_max.h>

// -- this is a simple odd class provided for 'static' usage
// -- to calculate max. usage of a preferred  menue size (x,y)
// -- this is due to 16:9 TV zoom functions, which are cutting menues.
// -- so using this function will make menues to obey max. screen settings.
//
// usage:  e.g.  try to paint menue h: 500 w, 400  (but screen is limited
//         to (450 x 420)), functions will return 450 and 400
//         the _add factor is for boundary...
//
//         16:9 Zoom-Mode on a Thomson TV set will e.g. be 625x415
//
//  2004-03-17 rasc

int w_max(int w_size, int w_add)
{
	int dw;
	int ret;

	dw = (g_settings.screen_EndX - g_settings.screen_StartX);

	ret = w_size;
	if (dw <= (w_size + w_add))
		ret = dw - w_add;

	return ret;
}

int h_max(int h_size, int h_add)
{
	int dh;
	int ret;

	dh = (g_settings.screen_EndY - g_settings.screen_StartY);

	ret = h_size;
	if (dh <= (h_size + h_add))
		ret = dh - h_add;

	return ret;
}

// some helpers to get x and y screen values vor menus and windows
int getScreenStartX(int width)
{
	int w = width;
	int r = (((g_settings.screen_EndX - g_settings.screen_StartX) - w) / 2) + g_settings.screen_StartX;
	return r < 0 ? 0 : r;
}

int getScreenStartY(int height)
{
	int y = height;
	int r = (((g_settings.screen_EndY - g_settings.screen_StartY) - y) / 2) + g_settings.screen_StartY;
	return r < 0 ? 0 : r;
}