public void OnDestroyed()
{
// Destroy presenter first (so that its backbuffer and render target are destroyed properly before other resources)
graphicsDevice.Presenter?.OnDestroyed();
foreach (var resource in graphicsDevice.Resources)
{
resource.OnDestroyed();
resource.LifetimeState = GraphicsResourceLifetimeState.Destroyed;
}
// Clear various graphics device internal states (input layouts, FBOs, etc...)
graphicsDevice.OnDestroyed();
}
protected override void ResizeBackBuffer(int width, int height, PixelFormat format)
{
graphicsDevice.OnDestroyed();
startingPresentationParameters.BackBufferWidth = width;
startingPresentationParameters.BackBufferHeight = height;
graphicsDevice.InitDefaultRenderTarget(startingPresentationParameters);
var newTextureDescrition = backBuffer.Description;
newTextureDescrition.Width = width;
newTextureDescrition.Height = height;
// Manually update the texture
backBuffer.OnDestroyed();
// Put it in our back buffer texture
backBuffer.InitializeFrom(newTextureDescrition);
}