/* $Id: splashscreen.cpp,v 1.11 2005/06/28 13:55:24 chfreund Exp $ */

#include "splashscreen.hpp"
#include "global.hpp"
#include "loader.hpp"
#include "wopsettings.hpp"

SplashScreen::SplashScreen() {
	m_logo = Loader::getInstance()->getImage( "images/gui/wop_logo_1.png", false, true );
	m_alpha = 0;
	SDL_SetAlpha( m_logo, SDL_SRCALPHA | SDL_RLEACCEL, 0 );
}

SplashScreen::~SplashScreen() {
	INFO( "SplashScreen::~SplashScreen()\n" );

	// prevent segfault in SplashScreen::update routine
	// when destructor is already called
	SDL_RemoveTimer( m_timer );
	SDL_Delay( 200 ); // wait for 0.2 s
}

void SplashScreen::draw( SDL_Surface* surface ) {
	LOG( 5 ) INFO( "SplashScreen::draw: drawing logo with alpha %d\n", m_alpha );
	SDL_Rect rect;
	rect.x = _pos_x;
	rect.y = _pos_y;
	SDL_BlitSurface( m_logo, NULL, surface, &rect );
}

void SplashScreen::startAnimation() {
	m_startTicks = SDL_GetTicks();
	m_timer = SDL_AddTimer( 40, splashScreenUpdateWrapper, this );
}

void SplashScreen::update() {
	if ( m_alpha < 255 ) {
		if ( SDL_GetTicks() - m_startTicks > 2500 ) {
			m_alpha += 5;
			LOG( 5 ) INFO( "SplashScreen::update: setting alpha to %d\n", m_alpha );
			SDL_SetAlpha( m_logo, SDL_SRCALPHA | SDL_RLEACCEL, m_alpha );
		}
	}
	else {
		SDL_RemoveTimer( m_timer );
	}
}

Uint32 splashScreenUpdateWrapper( Uint32 interval, void* data ) {
	Uint32 ticksBefore = SDL_GetTicks();
	SplashScreen* splashScreen = static_cast<SplashScreen*>( data );
	splashScreen->update();
	Uint32 ticksAfter = SDL_GetTicks();
	Uint32 duration = ticksAfter - ticksBefore;
	Uint32 newInterval = ( duration >= 40 ) ? 1 : 40 - duration;
	return newInterval;
}