Make xSpriteAnimation orchestrable and register every animation into the app when started

include/xSDL.h

@@ -1,6 +1,7 @@
 #ifndef DEF_XSDL_H
 	#define DEF_XSDL_H
 
+	#include "../xSDL/xOrchestrable.h"
 	#include "../xSDL/xApplication.h"
 	#include "../xSDL/xController.h"
 	#include "../xSDL/xElement.h"

xSDL/xApplication.cpp

@@ -303,7 +303,18 @@ void xApplication::schedule(){
 	// poll events
 	SDL_Event event;
 	while( SDL_PollEvent(&event) != 0 )
-		this->_controller.handleEvent(&event);
+		_controller.handleEvent(&event);
+
+	const uint32_t ticks = SDL_GetTicks();
+
+	// trigger tick() on registered orchestrables
+	_mutex_orchestrate.try_lock();
+	set<xOrchestrable*>::iterator it;
+	for( it = _orchestrables.begin() ; it != _orchestrables.end() ; it++ ){
+		xOrchestrable* orchestrable = *it;
+		orchestrable->tick(ticks);
+	}
+	_mutex_orchestrate.unlock();
 
 	// wait to satisfy FPS
 	this->syncFps();
@@ -312,6 +323,18 @@ void xApplication::schedule(){
 	this->render();
 }
 
+void xApplication::addOrchestrable(xOrchestrable* o){
+	_mutex_orchestrate.try_lock();
+	_orchestrables.insert(o);
+	_mutex_orchestrate.unlock();
+}
+
+void xApplication::removeOrchestrable(xOrchestrable* o){
+	_mutex_orchestrate.try_lock();
+	_orchestrables.erase(o);
+	_mutex_orchestrate.unlock();
+}
+
 /** synchronizes according to FPS
  * to be used at the end of the UI loop */
 void xApplication::syncFps(){

xSDL/xApplication.h

@@ -4,13 +4,14 @@
 	#include "SDL.h"
 	#include "SDL_image.h"
 	#include <vector>
-	#include <map>
+	#include <set>
 	#include <string>
 	#include <mutex>
 	#include <thread>
 	#include <stdexcept>
 	#include "xElement.h"
 	#include "xController.h"
+	#include "xOrchestrable.h"
 	using namespace std;
 
 	enum xAppState {
@@ -19,8 +20,6 @@
 		STOPPED
 	};
 
-	#define EventListener void(*)(SDL_Event*)
-
 	class xApplication{
 
 		public:
@@ -52,6 +51,10 @@
 			void setFps(const uint32_t fps=0);
 			void schedule();
 
+			// manage orchestrables
+			void addOrchestrable(xOrchestrable* o);
+			void removeOrchestrable(xOrchestrable* o);
+
 			xAppState state;
 		private:
 			/** Singleton */
@@ -70,6 +73,9 @@
 			// sprites
 			set<xElement*> _sprites;
 
+			// execution pool
+			set<xOrchestrable*> _orchestrables;
+
 			// sdl objects
 			SDL_Window   *_window;
 			SDL_Rect      _winrect;
@@ -79,6 +85,7 @@
 
 			// thread safety
 			mutex _mutex_draw;
+			mutex _mutex_orchestrate;
 	};
 
 #endif

xSDL/xOrchestrable.cpp

@@ -0,0 +1 @@
+#include "xOrchestrable.h"

xSDL/xOrchestrable.h

@@ -0,0 +1,11 @@
+#ifndef DEF_XORCHESTRABLE_H
+	#define DEF_XORCHESTRABLE_H
+
+	#include <stdint.h>
+
+	// abstract class for orchestrables
+	struct xOrchestrable {
+		virtual void tick(const uint32_t ticks) = 0;
+	};
+
+#endif

xSDL/xSpriteAnimation.cpp

@@ -8,11 +8,9 @@ xSpriteAnimation::~xSpriteAnimation(){
 	_mutex.unlock();
 }
 
-
 /** builds an animation */
 xSpriteAnimation::xSpriteAnimation(const char *url, SDL_Rect dest)
 : xSprite( url ){
-
 	this->dimensions(dest);
 }
 
@@ -23,24 +21,23 @@ xSpriteAnimation::xSpriteAnimation(SDL_Surface *s, SDL_Rect dest)
 	this->dimensions(dest);
 }
 
-
 /** adds an animation frame */
 void xSpriteAnimation::addFrame(SDL_Rect clip){
-	_mutex.try_lock();
+	_mutex_frames.try_lock();
 	_frames.push_back( (SDL_Rect){
 		clip.x,
 		clip.y,
 		clip.w,
 		clip.h
 	} );
-	_mutex.unlock();
+	_mutex_frames.unlock();
 }
 
 /** clears all frames */
 void xSpriteAnimation::clearFrames(){
-	_mutex.try_lock();
+	_mutex_frames.try_lock();
 	_frames.erase(_frames.begin(), _frames.end());
-	_mutex.unlock();
+	_mutex_frames.unlock();
 }
 
 /** draw to scene */
@@ -56,61 +53,24 @@ void xSpriteAnimation::draw(SDL_Renderer* renderer){
 }
 
 /** animation process */
-void xSpriteAnimationProcess(xSpriteAnimation *xSA, uint32_t t, int flags){
+void xSpriteAnimation::tick(const uint32_t ticks){
-	uint32_t timer = 0;
+	_mutex_frames.try_lock();
-	bool way  = true;
+	uint32_t time_index  = ticks / _interval;
-	uint32_t start = 0;
+	size_t   frame_index = time_index % _frames.size();
 
-	while( flags&SPRITE_ANIM_INFINITE ){
+	// update current frame clip
-
+	_src = _frames.at(frame_index);
-		// for every frame (sprite)
+	_mutex_frames.unlock();
-		for( uint32_t i = start ; i != xSA->_frames.size() ; i+=(way?1:-1) ){
-			timer = SDL_GetTicks();
-
-			// update current frame clip
-			// xSA->_mutex.try_lock();
-			xSA->_src = xSA->_frames.at(i);
-			// xSA->_mutex.unlock();
-
-			// xSA->manager()->update();
-
-			if( SDL_GetTicks()-timer < t )
-				SDL_Delay( t - (SDL_GetTicks()-timer) );
-		}
-
-		// manage reverse flag
-		if( flags&SPRITE_ANIM_REVERSE ){
-			way = !way;
-			start = (way) ? 0 : xSA->_frames.size()-1;
-		}
-
-	}
-
-	// end thread
-	return;
 }
 
 
 /** adds the animation to the render */
-void xSpriteAnimation::start(int t, int flags){
+void xSpriteAnimation::start(uint32_t interval){
-	_timeout = t;
+	_interval = interval;
-	_flags   = flags;
+	xApplication::get()->addOrchestrable(this);
-
-	// launch animation
-	_animation = new thread(xSpriteAnimationProcess, this, t, flags);
-
-	// don't wait for the thread to end
-	_animation->detach();
 }
 
-
-
 /** stops the animation */
 void xSpriteAnimation::stop(){
-	// stop animation thread
+	xApplication::get()->removeOrchestrable(this);
-	delete _animation;
-	if( _animation->joinable() )
-		_animation->join();
-
-	_animation = NULL;
 }

xSDL/xSpriteAnimation.h

@@ -2,18 +2,14 @@
 	#define DEF_XSPRITEANIMATION_H
 
 	#include "SDL.h"
+	#include <vector>
 	#include "xSprite.h"
 	#include "xApplication.h"
 	#include "xElement.h"
-	#include <vector>
+	#include "xOrchestrable.h"
-	#include <thread>
 	using namespace std;
 
-	#define SPRITE_ANIM_ONCE     0b1
+	class xSpriteAnimation : public xSprite, public xOrchestrable {
-	#define	SPRITE_ANIM_INFINITE 0b10
-	#define SPRITE_ANIM_REVERSE  0b100
-
-	class xSpriteAnimation : public xSprite {
 
 		public:
 			// spritesheet with sprite size
@@ -25,22 +21,20 @@
 			void clearFrames();
 
 			// animation control handles
-			void start(int t, int flags=SPRITE_ANIM_ONCE);
+			void start(uint32_t delay);
 			void stop();
 
 			// implement xElement
 			void draw(SDL_Renderer* renderer) override;
 
+			// implement xOrchestrable
+			void tick(const uint32_t ticks);
 		protected:
 			vector<SDL_Rect> _frames;
+			mutex _mutex_frames;
 
 			// animation
-			int _timeout;
+			uint32_t _interval;
-			int _flags;
-
-			// animation thread
-			thread *_animation;
-			friend void xSpriteAnimationProcess(xSpriteAnimation *xSA, uint32_t t, int flags);
 
 	};