xmario/xSDL/xSprite.cpp

#include "xSprite.h"

/** clean SDL objects */
xSprite::~xSprite(){
	_mutex.try_lock();
	SDL_FreeSurface( _surface );
	_mutex.unlock();
}

/** color sprite */
xSprite::xSprite(const int rgba[]){
	this->setSurface(rgba);
}

/** image sprite */
xSprite::xSprite(const char *url){
	this->setSurface(url);
}
/** image sprite with clip */
xSprite::xSprite(const char *url, SDL_Rect clip){
	this->setSurface(url);
	this->setClip(clip);
}

/** update sprite to rhb color */
void xSprite::setSurface(const int rgba[]){
	_mutex.try_lock();
	if( _surface != NULL ){
		SDL_FreeSurface( _surface );
		_surface = NULL;
	}

	_surface = SDL_CreateRGBSurface(0, 0, 0, 32, rgba[0], rgba[1], rgba[2], rgba[3]);

	if( _surface == NULL ) {
		throw runtime_error("[xSprite] setSurface(rgba) -> NULL surface");
	}
	_mutex.unlock();
}



/** update sprite to image */
void xSprite::setSurface(const char *url){
	_mutex.try_lock();
	if( _surface != NULL ){
		SDL_FreeSurface( _surface );
		_surface = NULL;
	}

	_surface = IMG_Load(url);

	if( _surface == NULL ) {
		throw runtime_error("[xSprite] setSurface(url) -> NULL surface");
	}
	_mutex.unlock();
}

/** copies an existing surface */
void xSprite::setSurface(SDL_Surface *s){
	_mutex.try_lock();
	if( _surface != NULL ){
		SDL_FreeSurface( _surface );
		_surface = NULL;
	}

	_surface = s;

	if( _surface == NULL ) {
		throw runtime_error("[xSprite] setSurface(surface) -> NULL surface");
	}

	_mutex.unlock();
}

/** add new animation frame with new clip */
void xSprite::addFrame(SDL_Rect clip){
	_mutex.try_lock();
	_frames.push_back(clip);
	_mutex.unlock();
}

/** clear every animation frames */
void xSprite::clearFrames(){
	_mutex.try_lock();
	_frames.clear();
	_mutex.unlock();
}
/** set sprite clip and clears animation frames */
void xSprite::setClip(SDL_Rect clip){
	_mutex.try_lock();
	_frames.clear();
	_frames.push_back(clip);
	_mutex.unlock();
}

/** set sprite projection */
void xSprite::project(SDL_Rect dest){
	_mutex.try_lock();
	_projection = dest;
	_mutex.unlock();
}

/** draws to renderer */
void xSprite::draw(SDL_Renderer* renderer){
	_mutex.try_lock();

	// no clip -> use surface dimensions
	if( _frames.size() <= 0 ){
		setClip( (SDL_Rect){0, 0, _surface->w, _surface->h} );
	}

	// only 1 clip -> use it
	if( _frames.size() == 1 ){
		_active_clip = 0;
	}

	SDL_RenderCopy(
		renderer,
		SDL_CreateTextureFromSurface(renderer, _surface),
		&_frames.at(_active_clip),
		&_projection
	);
	_mutex.unlock();
}

/** animation process */
void xSprite::tick(const uint32_t ticks){
	_mutex.try_lock();
	uint32_t time_index  = ticks / _animation_interval;
	_active_clip = time_index % _frames.size();
	_mutex.unlock();
}

/** orchestrate the animation */
void xSprite::animate(uint32_t interval){
	_animation_interval = interval;
	xApplication::get()->addOrchestrable(this);
}

/** stops orchestrating the animation */
void xSprite::freeze(){
	xApplication::get()->removeOrchestrable(this);
}