Topics

1

Window / [sf::Context] recursive loop, causing crash (loading resources in thread)

« on: February 21, 2016, 11:35:30 am »

Callstack:

(...)
        appSnakeClient-vc11.exe!sf::GlResource::GlResource() Line 61    C++
        appSnakeClient-vc11.exe!sf::Context::Context() Line 61  C++
        appSnakeClient-vc11.exe!`anonymous namespace'::getInternalContext() Line 155    C++
        appSnakeClient-vc11.exe!sf::priv::GlContext::ensureContext() Line 213   C++
        appSnakeClient-vc11.exe!sf::GlResource::GlResource() Line 61    C++
        appSnakeClient-vc11.exe!sf::Context::Context() Line 61  C++
        appSnakeClient-vc11.exe!`anonymous namespace'::getInternalContext() Line 155    C++
        appSnakeClient-vc11.exe!sf::priv::GlContext::ensureContext() Line 213   C++
        appSnakeClient-vc11.exe!sf::GlResource::GlResource() Line 61    C++
        appSnakeClient-vc11.exe!sf::Context::Context() Line 61  C++
        appSnakeClient-vc11.exe!`anonymous namespace'::getInternalContext() Line 155    C++
        appSnakeClient-vc11.exe!sf::priv::GlContext::ensureContext() Line 213   C++
        appSnakeClient-vc11.exe!sf::GlResource::GlResource() Line 61    C++
        appSnakeClient-vc11.exe!sf::Context::Context() Line 61  C++
        appSnakeClient-vc11.exe!`anonymous namespace'::getInternalContext() Line 155    C++
        appSnakeClient-vc11.exe!sf::priv::GlContext::ensureContext() Line 213   C++
        appSnakeClient-vc11.exe!sf::GlResource::GlResource() Line 61    C++
        appSnakeClient-vc11.exe!sf::Context::Context() Line 61  C++
        appSnakeClient-vc11.exe!`anonymous namespace'::getInternalContext() Line 155    C++
        appSnakeClient-vc11.exe!sf::priv::GlContext::ensureContext() Line 213   C++
        appSnakeClient-vc11.exe!sf::GlResource::GlResource() Line 61    C++
        appSnakeClient-vc11.exe!sf::Context::Context() Line 61  C++
        appSnakeClient-vc11.exe!`anonymous namespace'::getInternalContext() Line 155    C++
        appSnakeClient-vc11.exe!sf::priv::GlContext::ensureContext() Line 213   C++
        appSnakeClient-vc11.exe!sf::GlResource::GlResource() Line 61    C++
 

Some parts of SFML code:

Context::Context() // <== GOES HERE! constructor is calling inherited constructor GlResource::GlResource
{
    m_context = priv::GlContext::create();
    setActive(true);
}

GlResource::GlResource()
{
    {
        // Protect from concurrent access
        Lock lock(mutex);

        // If this is the very first resource, trigger the global context initialization
        if (count == 0)
            priv::GlContext::globalInit();

        // Increment the resources counter
        count++;
    }

    // Now make sure that there is an active OpenGL context in the current thread
    priv::GlContext::ensureContext();  // <== GOES HERE!
}

void GlContext::ensureContext()
{
    // If there's no active context on the current thread, activate an internal one
    if (!currentContext)
        getInternalContext()->setActive(true); // <== GOES HERE!
}


namespace
{
    sf::Context* getInternalContext()
    {
        if (!hasInternalContext())
        {
            internalContext = new sf::Context; // <== GOES HERE!
            sf::Lock lock(internalContextsMutex);
            internalContexts.insert(internalContext);
        }

        return internalContext;
    }
}

 

2

Graphics / [Android] White sprite issue

« on: February 13, 2016, 07:43:24 pm »

I'm trying to make simple Android application with SFML, but I have problems with rendering textures. When I was loading images, they appeared white. I have made simpler example which also reproduces white sprite at emulator:

#include <SFML/System.hpp>
#include <SFML/Window.hpp>
#include <SFML/Graphics.hpp>

int main(int argc, char *argv[])
{
        sf::RenderWindow window(sf::VideoMode::getDesktopMode(), "");

        sf::Image img;
        img.create(200,100,sf::Color::Red);

        sf::Texture texture;
        if(!texture.loadFromImage(img))
                return 0;

        sf::Sprite sprite(texture);
        sprite.setPosition(200,200);
        sprite.setOrigin(50,50);

        while (window.isOpen())
        {
                sf::Event event;
                while (window.pollEvent(event)) {}

                window.clear(sf::Color::Blue);
                window.draw(sprite);// WHY SPRITE IS WHITE?
                window.display();
        }
        return 0;
}

Could you tell me why it's not working correctly? Do I need to add some extra flags while compiling SFML libraries or link extra libraries into final application?