SFML - Access Violation on program exit.

[bigdoggie]

So, I've decided to start off at SFML, but whenever My program gets closed, a memory acces violation occurs, either by window::Close() or return.

Here's my code, which is actually part of one of their tutorials.

[cpp]#include "stdafx.h"
#include <SFML/Graphics.hpp>

int main(int argc, char** argv)
{
sf::WindowSettings Settings;
Settings.DepthBits = 24; // Request a 24 bits depth buffer
Settings.StencilBits = 8; // Request a 8 bits stencil buffer
Settings.AntialiasingLevel = 8; // Request 8 levels of antialiasing
sf::RenderWindow App(sf::VideoMode(800, 600, 32), "SFML Test", sf::Style::Close, Settings);

//App.PreserveOpenGLStates(true);

//sf::String FPS("fps", sf::Font::GetDefaultFont(), 30.f);

sf::String FPS;
FPS.SetText("fps");
FPS.SetFont(sf::Font::GetDefaultFont());
FPS.SetSize(10.f);
FPS.SetColor(sf::Color::White);

while (App.IsOpened())
{
sf::Event Event;
while (App.GetEvent(Event))
{
if (Event.Type == sf::Event::Closed)
App.Close();
if (Event.Type == sf::Event::KeyPressed)
{
if (Event.Key.Code == sf::Key::Escape)
App.Close();
}
}

float ElapsedTime = App.GetFrameTime();

App.Clear();

App.Draw(FPS);

App.Display();
}
return EXIT_SUCCESS;
}[/cpp]

I ask you, facepunch, because I cba to create a new account at their forums right now.

But yes, I've searched.

If it helps, I'm using C++ in MSVC '09.

[Tezza1234]

/I believe it's because you are doing clear-draw-display and stuff after you are closing, Move that stuff before your event testing and see what happens.

Only thing I can think of :o

[Sporbie]

Declare the font on the heap (as it's fairly large), because once I had a std::vector<sf::Image> (also fairly large), and I got the same error upon closing, changing to std::vector<sf::Image*> fixed things.

[editline]09:49PM[/editline]

Oh you're using the default SFML font.

Well don't, try to declare your own font, on the heap of course.

[bigdoggie]

@Tezza: Unfortunately, it didn't help, same error.

@Sporbie: If I try to declare my own font, then it will report that it cannot open the ttf file.. Do I have to copy it over to the program's directory? Shouldn't it pull it out of the system fonts?

EDIT: How would one declare the font on the heap?

[editline]09:32PM[/editline]

Actually, nevermind that last edit.

I still get the same error, though.
This is what it's point to:
[cpp]void WindowImplWin32::SetActive(bool Active) const
{
if (Active)
{
if (myDeviceContext && myGLContext && (wglGetCurrentContext() != myGLContext))
wglMakeCurrent(myDeviceContext, myGLContext);
}
else
{
if (wglGetCurrentContext() == myGLContext)
wglMakeCurrent(NULL, NULL);
}
}[/cpp]
In the file WindowImplWin32.cpp

[bigdoggie]

Got back from other stuff.

Anyway, this error only occurs with text, and I read somewhere that it has to do with it's deconstructor, being called twice or something.

[BMCha]

If it's the error I'm thinking of, it's because of the default font. Linking statically should get rid of the error.

[Sloped]

It's the default font, try using your own.

[bigdoggie]

I've tried doing
[cpp]sf::Font MyFont = new sf::Font;
if (!MyFont.LoadFromFile("C:\\WINDOWS\\Fonts\\arial.ttf", 30))
return EXIT_FAILURE;
//---
FPS.SetFont(MyFont);[/cpp]
But to no avail.

[BMCha]

try
[cpp]
sf::Font * MyFont = new sf::Font;
if (!MyFont->LoadFromFile("C:/WINDOWS/Fonts/arial.ttf", 30))
return EXIT_FAILURE;
//---
FPS.SetFont(&MyFont);
[/cpp]

And remember to specify the font in the sf::String's constructor, otherwise it will load the default font first.

[bigdoggie]

[QUOTE=BMCHa;16844493]
[b]And remember to specify the font in the sf::String's constructor, otherwise it will load the default font [/b]first.[/QUOTE]

[i]I did not try this before[/i]

That solved it, thank you, no more access errors :D