So, I've created a new MFC single-document app.
In the main CWinAppEx class, I have overloaded the virtual function
int Run() to include a more suitable loop for updating & rendering (and if you'd like to see the code, I'll be happy to show it, but I find it irrelevant to the issue at hand... The only important thing to note here is that it works, includes code directly from the original superclass's
Run method, and calls the main view's
Update and
Render functions between each Win32 message pump)...
In my CView class, I have publicly subclassed
sf::RenderWindow. I have also used the class wizard to be notified of the WM_CREATE message, during which I use
GetSafeHwnd() to grab the view's window handle, which I perform some validation on before passing it to
sf::RenderWindow::create (see code below for details)... This all appears to work, and I do indeed get a black screen (or whatever color I specify) during each call to
clear and
display...
Now comes the strange part... Adding a texture to the view class doesn't appear to render anything. If I don't subclass
RenderWindow, and instead create the window as an external window (without passing in the window's handle), the sprite shows on the screen. But anytime I attempt to use the view's HWND, I get a cleared screen of whatever color I specify, but no sprite/texture. Here's some code:
int CSFMLMultiWindowTestView::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CView::OnCreate(lpCreateStruct) == -1)
return -1;
sf::WindowHandle hWnd = GetSafeHwnd();
if(hWnd == nullptr || !IsWindow(hWnd))
return -1; // Disallow invalid window handles
create(hWnd); // Attach this window's handle to the SFML RenderWindow
// This line simply tells the main app to use this class for
// Update and Render calls inbetween each Win32 message pump...
theApp.SetCooperativeObject(this);
return 0;
}
BOOL CSFMLMultiWindowTestView::Init()
{
// Either load a texture, or exit the app if it doesn't work out
m_texture = sf::Texture();
if(!m_texture.loadFromFile("data/image1.bmp"))
return FALSE;
// Use the texture to create a sprite
m_sprite = sf::Sprite();
m_sprite.setTexture(m_texture);
m_sprite.setPosition(0, 0);
// Just to be 100% sure, force visibility
ShowWindow(SW_SHOW);
setVisible(true);
return TRUE;
}
BOOL CSFMLMultiWindowTestView::Update(double timeElapsed)
{
if(!m_bInitialized) {
// We haven't been initialized yet. Do so now, and only once.
m_bInitialized = Init();
return m_bInitialized;
}
return TRUE;
}
VOID CSFMLMultiWindowTestView::Render()
{
// Pretty basic render code...
clear();
draw(m_sprite); // WHY U NO WORK!?
display();
}
Again, it works just fine when I allow SFML to create it's own window instead of passing in my window's handle...
So what the hell could cause it not to work with my own HWND? (ノಠ益ಠ)ノ彡┻━┻
