AppTime Class Reference

Inheritance diagram for AppTime:

Public Member Functions
	AppTime (const int width, const int height, const int major=3, const int minor=3)
	constructeur, dimensions de la fenetre et version d'openGL.
virtual int	init ()=0
	a deriver pour creer les objets openGL.
virtual int	quit ()=0
	a deriver pour detruire les objets openGL.
virtual int	update (const float time, const float delta)
	a deriver et redefinir pour animer les objets en fonction du temps.
virtual int	render ()=0
	a deriver pour afficher les objets.
Public Member Functions inherited from App
	App (const int width, const int height, const int major=3, const int minor=3)
	constructeur, dimensions de la fenetre et version d'openGL.
int	run ()
	execution de l'application.

Protected Member Functions
virtual int	prerender ()
virtual int	postrender ()
Protected Member Functions inherited from App
void	vsync_off ()

Protected Attributes
std::chrono::high_resolution_clock::time_point	m_cpu_start
std::chrono::high_resolution_clock::time_point	m_cpu_stop
GLuint	m_time_query [MAX_FRAMES]
GLint64	m_frame_time
int	m_frame
Text	m_console
Protected Attributes inherited from App
Window	m_window
Context	m_context
bool	sync

Detailed Description

Definition at line 18 of file app_time.h.

Constructor & Destructor Documentation

AppTime()

AppTime::AppTime	(	const int	width,
		const int	height,
		const int	major = 3,
		const int	minor = 3 )

constructeur, dimensions de la fenetre et version d'openGL.

Definition at line 8 of file app_time.cpp.

    : App(width, height, major, minor)
{
    // desactive vsync + synchro gpu pour les mesures de temps
    vsync_off();
    
    // requetes pour mesurer le temps gpu
    m_frame= 0;
    glGenQueries(MAX_FRAMES, m_time_query);
    
    // initialise les queries, plus simple pour demarrer 
    for(int i= 0; i < MAX_FRAMES; i++)
    {
        glBeginQuery(GL_TIME_ELAPSED, m_time_query[i]); 
        glEndQuery(GL_TIME_ELAPSED);
    }
    
    // affichage du temps  dans la fenetre
    m_console= create_text();
}

~AppTime()

AppTime::~AppTime ( )

virtual

Definition at line 29 of file app_time.cpp.

{
    glDeleteQueries(MAX_FRAMES, m_time_query);
    release_text(m_console);
}

Member Function Documentation

init()

virtual int AppTime::init ( )

pure virtual

a deriver pour creer les objets openGL.

Implements App.

Implemented in DrawInstanceBuffer, DrawInstanceBuffer, Quads, Quads, RT, RT, StorageImage, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, and TP.

quit()

virtual int AppTime::quit ( )

pure virtual

a deriver pour detruire les objets openGL.

Implements App.

Implemented in DrawInstanceBuffer, DrawInstanceBuffer, Quads, Quads, RT, RT, StorageImage, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, and TP.

update()

virtual int AppTime::update ( const float time, const float delta )

inlinevirtual

a deriver et redefinir pour animer les objets en fonction du temps.

Reimplemented from App.

Reimplemented in DrawInstanceBuffer, DrawInstanceBuffer, TP, TP, TP, TP, and TP.

Definition at line 31 of file app_time.h.

{ return 0; }

render()

virtual int AppTime::render ( )

pure virtual

a deriver pour afficher les objets.

Implements App.

Implemented in DrawInstanceBuffer, DrawInstanceBuffer, Quads, Quads, RT, RT, StorageImage, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, TP, and TP.

prerender()

int AppTime::prerender ( )

protectedvirtual

Reimplemented from App.

Definition at line 35 of file app_time.cpp.

{ 
#ifndef GK_RELEASE
    // verifie que la requete est bien dispo sans attente...
    {
        GLuint ready= GL_FALSE;
        glGetQueryObjectuiv(m_time_query[m_frame], GL_QUERY_RESULT_AVAILABLE, &ready);
        if(ready != GL_TRUE)
            printf("[oops] wait query, frame %d...\n", m_frame);
    }
#endif    
    
    // recupere la mesure precedente...
    m_frame_time= 0;
    glGetQueryObjecti64v(m_time_query[m_frame], GL_QUERY_RESULT, &m_frame_time);
    
    // prepare la mesure de la frame courante...
    glBeginQuery(GL_TIME_ELAPSED, m_time_query[m_frame]);
    
    // mesure le temps d'execution du draw pour le cpu
    // utilise std::chrono pour mesurer le temps cpu 
    m_cpu_start= std::chrono::high_resolution_clock::now();
    
    return update(global_time(), delta_time());
}

postrender()

int AppTime::postrender ( )

protectedvirtual

Reimplemented from App.

Definition at line 61 of file app_time.cpp.

{
    m_cpu_stop= std::chrono::high_resolution_clock::now();
    int cpu_time= std::chrono::duration_cast<std::chrono::microseconds>(m_cpu_stop - m_cpu_start).count(); 
    
    glEndQuery(GL_TIME_ELAPSED);
    
    // selectionne une requete pour la frame suivante...
    m_frame= (m_frame + 1) % MAX_FRAMES;
    // les requetes sont gerees en fifo...
    
    // afficher le texte
    clear(m_console);        
    printf(m_console, 0, 1, "cpu  %02dms %03dus", cpu_time / 1000, cpu_time % 1000);
    printf(m_console, 0, 2, "gpu  %02dms %03dus", int(m_frame_time / 1000000), int((m_frame_time / 1000) % 1000));
    
    // affiche le temps dans le terminal 
    //~ printf("cpu  %02dms %03dus    ", cpu_time / 1000, cpu_time % 1000);
    //~ printf("gpu  %02dms %03dus\n", int(m_frame_time/ 1000000), int((m_frame_time / 1000) % 1000));
    
    draw(m_console, window_width(), window_height());
    
    return 0;
}

Member Data Documentation

m_cpu_start

std::chrono::high_resolution_clock::time_point AppTime::m_cpu_start

protected

Definition at line 40 of file app_time.h.

m_cpu_stop

std::chrono::high_resolution_clock::time_point AppTime::m_cpu_stop

protected

Definition at line 41 of file app_time.h.

m_time_query

GLuint AppTime::m_time_query[MAX_FRAMES]

protected

Definition at line 43 of file app_time.h.

m_frame_time

GLint64 AppTime::m_frame_time

protected

Definition at line 44 of file app_time.h.

m_frame

int AppTime::m_frame

protected

Definition at line 45 of file app_time.h.

m_console

Text AppTime::m_console

protected

Definition at line 47 of file app_time.h.

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The documentation for this class was generated from the following files:

• src/gKit/app_time.h
• src/gKit/app_time.cpp