Messages

1

Graphics / Re: SFML + Qt + render to QImage problem

« on: December 14, 2013, 01:03:48 pm »

Hello guys!
After several hours of working I found that I dont call method sf::RenderTarget::initialize(); in my class. So I call this method and some glitches are gone. But bug with text remained. I add new screenshot in attachment.

So here new code:

main.cpp

#include "MyQmlGUIWin.h"

#include "SFMLItem.h"
#include "SFMLEngine.h"
#include <SFML/Window.hpp>
#include <SFML/Graphics.hpp>
#include <QQmlContext>
#include <QApplication>
#include <QDebug>


int main(int argc, char **argv)
{
    QApplication *app;
    app = new QApplication(argc, argv);

    SFMLEngine *engine;
    engine = new SFMLEngine();

    sf::Font font;
    font.loadFromFile("data/fonts/DejaVuSans.ttf");

    sf::Text text;
    text.setFont(font);
    text.setString("Hello world");
    text.setCharacterSize(24);
    text.setColor(sf::Color::Red);
    text.setStyle(sf::Text::Bold | sf::Text::Underlined);

    sf::CircleShape shape(50);
    shape.setFillColor(sf::Color(150, 50, 250));
    shape.setRadius(40);
    shape.setPosition(100, 100);

    // set a 10-pixel wide orange outline
    shape.setOutlineThickness(10);
    shape.setOutlineColor(sf::Color(250, 150, 100));

    engine->clear();
    engine->draw(text);
    engine->draw(shape);
    engine->display();

    engine->saveOnHDD();


    int returnCode;
    //returnCode = app->exec();

    delete app;

    return 0;
}
 

SFMLEngine is custom sf::RenderTarget. And here is code.

SFMLEngine.h

#ifndef SFMLEngine_H
#define SFMLEngine_H

#include <SFML/Graphics/RenderTarget.hpp>
#include <QOpenGLContext>
#include <QOpenGLFramebufferObjectFormat>
#include <QSGTexture>
#include <QQuickWindow>
#include <QOffscreenSurface>

class SFMLEngine: public QObject, public sf::RenderTarget
{
    Q_OBJECT
private:
    QOffscreenSurface *m_surface;
    QOpenGLContext *m_sfmlContext;
    QOpenGLFramebufferObject *m_fbo;

    sf::Vector2u m_size;

public:
    SFMLEngine();
    ~SFMLEngine();

    GLuint getTextureID();

    void saveOnHDD();

    void display();

protected:
    virtual sf::Vector2u getSize() const;
    virtual bool activate(bool par_active);
};

#endif
 

SFMLEngine.cpp

#include "SFMLEngine.h"

#include "SFMLItem.h"
#include "SFMLEngine.h"

#include <QOpenGLContext>
#include <QOpenGLFunctions>
#include <QDebug>
#include <QOpenGLTexture>

SFMLEngine::SFMLEngine(): QObject(0), RenderTarget()
{
    qDebug()<<"SFMLEngine::SFMLEngine";

    qmlRegisterType<SFMLItem>("SFML", 1, 0, "SFMLItem");
    qmlRegisterType<SFMLEngine>("SFML", 1, 0, "SFMLEngine");  

    QSurfaceFormat surfaceFormat;
    surfaceFormat.setRenderableType(QSurfaceFormat::OpenGL);
    surfaceFormat.setProfile(QSurfaceFormat::CompatibilityProfile);

    m_surface = new QOffscreenSurface();
    m_surface->setFormat(surfaceFormat);
    m_surface->create();

    m_sfmlContext = new QOpenGLContext();
    m_sfmlContext->setFormat(surfaceFormat);
    if(m_sfmlContext->create() == false)
        qDebug()<<Q_FUNC_INFO<<"Shit happens with QOpenGLContext create";

    if(m_sfmlContext->makeCurrent(m_surface) == false)
        qDebug()<<Q_FUNC_INFO<<"Shit happens with QOpenGLContext makeCurrent";

    QOpenGLFramebufferObjectFormat fboFormat;    
    fboFormat.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
    fboFormat.setTextureTarget(GL_TEXTURE_2D);
    fboFormat.setInternalTextureFormat(GL_RGBA8);

    m_size.x = 800;
    m_size.y = 600;

    m_fbo = new QOpenGLFramebufferObject(m_size.x, m_size.y, fboFormat);
    if(m_fbo->bind() == false)
        qDebug()<<Q_FUNC_INFO<<"Shit happens with QOpenGLFramebufferObject bind";

    sf::RenderTarget::initialize();
}

SFMLEngine::~SFMLEngine()
{
    qDebug()<<"SFMLEngine::~SFMLEngine";

    delete m_sfmlContext;
}

GLuint SFMLEngine::getTextureID()
{
    qDebug()<<"SFMLEngine::getTextureID";

    return m_fbo->texture();
}

void SFMLEngine::saveOnHDD()
{
    qDebug()<<"SFMLEngine::saveOnHDD";

    m_fbo->toImage().save("test.png", "PNG", 100);
}

void SFMLEngine::display()
{
    qDebug()<<"SFMLEngine::display";

    m_sfmlContext->swapBuffers(m_surface);
}

sf::Vector2u SFMLEngine::getSize() const
{
    qDebug()<<"SFMLEngine::getSize";

    return m_size;
}

bool SFMLEngine::activate(bool par_active)
{
    qDebug()<<"SFMLEngine::activate";

    bool returnValue;
    returnValue = false;

    if(par_active)
    {
        qDebug()<<"activate SFML content";

        QOpenGLContext *currentContext;
        currentContext = QOpenGLContext::currentContext();
        if(currentContext != 0)
            currentContext->doneCurrent();

        returnValue = m_sfmlContext->makeCurrent(m_surface);

        if(!m_fbo->isBound())
        {
            qDebug()<<"m_fbo->bind()";
            m_fbo->bind();
        }

        //glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
    }
    else
    {
        qDebug()<<"done SFML content";

        m_fbo->release();
        m_sfmlContext->doneCurrent();
    }

    return returnValue;
}
 

Here what I get at output:

QML debugging is enabled. Only use this in a safe environment.
SFMLEngine::SFMLEngine
SFMLEngine::getSize
SFMLEngine::getSize
SFMLEngine::activate
activate SFML content
SFMLEngine::activate
activate SFML content
SFMLEngine::activate
activate SFML content
SFMLEngine::getSize
SFMLEngine::getSize
SFMLEngine::getSize
SFMLEngine::activate
activate SFML content
SFMLEngine::activate
activate SFML content
SFMLEngine::display
SFMLEngine::saveOnHDD
 

I call draw method in main:

engine->clear();
engine->draw(text);
engine->draw(shape);
engine->display();
 

And I recieve 5 calls of method bool SFMLEngine::activate(bool par_active) with par_active=true I didnt understand is this right or not. And I didnt understand what can do bug in text like on screenshot in attachment.

2

Graphics / Re: SFML + Qt + render to QImage problem

« on: December 13, 2013, 04:42:25 pm »

Can you please explain what the problem is? Giving us code and hoping we'd understand everything, is not very wise.

What are you doing? What do you expect to happen? What happens? What seems to be the issue? And where in the code do you think the issue seems to be?

Oh sorry guys i don't write that bad screenshot in attachment. So please look on screenshot. Bad text appears and circle like an ellipse.

And I think that something wrong in SFMLEngine::activate(bool par_active)

3

Graphics / SFML + Qt + render to QImage problem

« on: December 13, 2013, 03:10:51 pm »

Hello guys!
I need your help. I didnt good at OpenGL and maybe I asked not in approriate topic. But I have some problem with using SFML in pair with Qt, and maybe you can point me the way where problem happens.

Screenshot with problem in attachment.

Here code of my main.cpp file:

main.cpp

#include "MyQmlGUIWin.h"

#include "SFMLItem.h"
#include "SFMLEngine.h"
#include <SFML/Window.hpp>
#include <SFML/Graphics.hpp>
#include <QQmlContext>
#include <QApplication>
#include <QDebug>


int main(int argc, char **argv)
{
    QApplication *app;
    app = new QApplication(argc, argv);

    SFMLEngine *engine;
    engine = new SFMLEngine();

    sf::Font font;
    font.loadFromFile("data/fonts/DejaVuSans.ttf");

    sf::Text text;
    text.setFont(font);
    text.setString("Hello world");
    text.setCharacterSize(24);
    text.setColor(sf::Color::Red);
    text.setStyle(sf::Text::Bold | sf::Text::Underlined);

    sf::CircleShape shape(50);
    shape.setFillColor(sf::Color(150, 50, 250));
    shape.setRadius(40);
    shape.setPosition(100, 100);

    // set a 10-pixel wide orange outline
    shape.setOutlineThickness(10);
    shape.setOutlineColor(sf::Color(250, 150, 100));

    engine->clear();
    engine->draw(text);
    engine->draw(shape);
    engine->display();

    engine->saveOnHDD();


    int returnCode;
    //returnCode = app->exec();

    delete app;

    return 0;
}
 

SFMLEngine is custom sf::RenderTarget. And here is code.

SFMLEngine.h

#ifndef SFMLEngine_H
#define SFMLEngine_H

#include <SFML/Graphics/RenderTarget.hpp>
#include <QOpenGLContext>
#include <QOpenGLFramebufferObjectFormat>
#include <QSGTexture>
#include <QQuickWindow>
#include <QOffscreenSurface>

class SFMLEngine: public QObject, public sf::RenderTarget
{
    Q_OBJECT
private:
    QOffscreenSurface *m_surface;
    QOpenGLContext *m_sfmlContext;
    QOpenGLFramebufferObject *m_fbo;

public:
    SFMLEngine();
    ~SFMLEngine();

    GLuint getTextureID();

    void saveOnHDD();

    void display();

protected:
    virtual sf::Vector2u getSize() const;
    virtual bool activate(bool par_active);
};

#endif
 

SFMLEngine.cpp

#include "SFMLEngine.h"

#include "SFMLItem.h"
#include "SFMLEngine.h"

#include <QOpenGLContext>
#include <QOpenGLFunctions>
#include <QDebug>

SFMLEngine::SFMLEngine(): QObject(0)
{
    qmlRegisterType<SFMLItem>("SFML", 1, 0, "SFMLItem");
    qmlRegisterType<SFMLEngine>("SFML", 1, 0, "SFMLEngine");  

    QSurfaceFormat surfaceFormat;
    surfaceFormat.setRenderableType(QSurfaceFormat::OpenGL);

    m_surface = new QOffscreenSurface();
    m_surface->create();

    m_sfmlContext = new QOpenGLContext();
    m_sfmlContext->setFormat(surfaceFormat);
    if(m_sfmlContext->create() == false)
        qDebug()<<Q_FUNC_INFO<<"Shit happens with QOpenGLContext create";

    if(m_sfmlContext->makeCurrent(m_surface) == false)
        qDebug()<<Q_FUNC_INFO<<"Shit happens with QOpenGLContext makeCurrent";

    QOpenGLFramebufferObjectFormat fboFormat;
    //fboFormat.setSamples(16);
    fboFormat.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);

    m_fbo = new QOpenGLFramebufferObject(800, 600, fboFormat);
    if(m_fbo->bind() == false)
        qDebug()<<Q_FUNC_INFO<<"Shit happens with QOpenGLFramebufferObject bind";
}

SFMLEngine::~SFMLEngine()
{
    delete m_sfmlContext;
}

GLuint SFMLEngine::getTextureID()
{
    return m_fbo->texture();
}

void SFMLEngine::saveOnHDD()
{
    m_fbo->toImage().save("test.png");
}

void SFMLEngine::display()
{
    m_sfmlContext->swapBuffers(m_surface);
}

sf::Vector2u SFMLEngine::getSize() const
{
    qDebug()<<"SFMLEngine::getSize";

    sf::Vector2u size;
    size.x = 800;
    size.y = 600;

    return size;
}

bool SFMLEngine::activate(bool par_active)
{
    qDebug()<<"SFMLEngine::activate"<<par_active;

    bool returnValue;
    returnValue = false;

    if(par_active)
    {
        qDebug()<<"SFMLEngine::activateSFMLContent";

        returnValue = m_sfmlContext->makeCurrent(m_surface);

        if(!m_fbo->isBound())
        {
            qDebug()<<"SFMLEngine::m_fbo->bind()";
            m_fbo->bind();
        }
    }
    else
    {
        qDebug()<<"SFMLEngine::doneSFMLContent";

        m_fbo->release();
        m_sfmlContext->doneCurrent();
    }

    return returnValue;
}
 

Here what I get at output:

QML debugging is enabled. Only use this in a safe environment.
SFMLEngine::activate true
SFMLEngine::activateSFMLContent
SFMLEngine::activate true
SFMLEngine::activateSFMLContent
SFMLEngine::activate true
SFMLEngine::activateSFMLContent
SFMLEngine::getSize
SFMLEngine::getSize
SFMLEngine::getSize
SFMLEngine::activate true
SFMLEngine::activateSFMLContent
SFMLEngine::activate true
SFMLEngine::activateSFMLContent
 

Entire project you can find at https://github.com/Hronom/GraphicSystem this code from GraphicSystemTest4. I am try to make some integration of SFML in QML. I am using latest SFML version from repo and Qt 5.2. My OS is lubuntu 13.10

4

Feature requests / Re: Method for retrying of availability of vertical sync

« on: July 23, 2013, 09:52:04 am »

Just put an option menu in your game when user can set if he wants vsync of frame limit (with vsync default).

Its not good, becouse, then user launch a game he see glitches in the main menu and user dont know why this glitches happens. So game must resolve some problems automaticly...

5

Feature requests / Re: Method for retrying of availability of vertical sync

« on: July 22, 2013, 12:55:08 pm »

Thanks for reply.

I have a situation, at home i have normal drivers with enabled vsync(NVIDIA), and then i enable vsync in SFML its works. Then i come to my friend its have integrated intel card and in its driver by default vsync disabled, so programs cant force using it.

I understand that this is driver specific. But it will be nice if i can retrive of availability of enabling feature like vsync. So if i cant enable i try emulate vsync.

6

Feature requests / Method for retrying of availability of vertical sync

« on: July 14, 2013, 06:58:45 pm »

I wanna some method that return true if vertical sync available on current platform. So if it not available i set maximum frame rate option.