Mmmm, been a while since I posted here .... anyway ...
I took up C# a while ago and I've been trying to figure out a strange problem, which is why my windows won't redraw immediately. Example:
I open the left window using an option in the Window menu. The main window doesn't refresh the area where the menu opened. It'll refresh if I drag the smaller window onto it, but even then the refresh is always a step behind, and everything leaves a "trail" of gray. I switched to managed DirectX mostly for the speed, but also to see if it would correct this. No dice. :(
I've tried calling every redraw, update, and invalidate function I can find, so not sure what I'm doing wrong. I decided to rip out the extra bits to get it down to a core of code I could post; here's the relevant bits of what I got. Anyone got some pointers?
public bool InitializeDirect3D()
{
PresentParameters pps;
try
{
pps = new PresentParameters(Program.maindevicecontext.PresentationParameters);
pps.BackBufferCount = 1;
pps.DeviceWindow = drawingwindow;
pps.DeviceWindowHandle = drawingwindow.Handle;
pps.BackBufferWidth = drawingwindow.Width;
pps.BackBufferHeight = drawingwindow.Height;
m_mainwindowswap = new SwapChain(Program.maindevicecontext, pps);
pps = new PresentParameters(Program.maindevicecontext.PresentationParameters);
pps.BackBufferCount = 1;
pps.DeviceWindow = currenttiles;
pps.DeviceWindowHandle = currenttiles.Handle;
pps.BackBufferWidth = currenttiles.Width;
pps.BackBufferHeight = currenttiles.Height;
m_currtilesswap = new SwapChain(Program.maindevicecontext, pps);
return true;
}
catch (DirectXException e)
{
MessageBox.Show(e.ToString(), "Error from main window!!");
return false;
}
}
public MainWindow()
{
scrollx = scrolly = 0;
InitializeComponent();
PresentParameters pps = new PresentParameters();
pps.Windowed = true;
pps.SwapEffect = SwapEffect.Discard;
Program.maindevicecontext = new Device(0, DeviceType.Hardware, this, CreateFlags.SoftwareVertexProcessing, pps);
if (this.InitializeDirect3D() == false)
{
MessageBox.Show("Could not initialize Direct3D.", "Error");
return;
}
PaintBigWindow();
PaintSmallWindow();
}
private void PaintBigWindow()
{
if (m_mainwindowswap.Disposed)
return;
Surface surf = m_mainwindowswap.GetBackBuffer(0, BackBufferType.Mono);
surf.Device.SetRenderTarget(0, surf);
// start drawing
surf.Device.BeginScene();
surf.Device.Clear(ClearFlags.Target, Color.Black, 1.0f, 0); // Clear the window
// DirectX bits go here, commented out for now
surf.Device.EndScene();
m_mainwindowswap.Present();
}
private void PaintSmallWindow()
{
if (m_currtilesswap.Disposed)
return;
Surface surf = m_currtilesswap.GetBackBuffer(0, BackBufferType.Mono);
surf.Device.SetRenderTarget(0, surf);
// start drawing
surf.Device.BeginScene();
surf.Device.Clear(ClearFlags.Target, Color.Black, 1.0f, 0); // Clear the window
// DirectX bits go here, commented out for now
surf.Device.EndScene();
m_currtilesswap.Present();
}
private void pictureBox1_Paint(object sender, PaintEventArgs e)
{
PaintBigWindow();
}
private void currenttiles_Paint(object sender, PaintEventArgs e)
{
PaintSmallWindow();
}
private void MainResize()
{
m_mainwindowswap.Dispose();
m_currtilesswap.Dispose();
// snip snip
InitializeDirect3D();
PaintBigWindow();
PaintSmallWindow();
}
private void MainWindow_Resize(object sender, EventArgs e)
{
MainResize();
}
private void tileWindowToolStripMenuItem_Click(object sender, EventArgs e)
{
smallwindow = new SmallWindow();
smallwindow.Show();
}
private void MainWindow_Paint(object sender, PaintEventArgs e)
{
PaintBigWindow();
PaintSmallWindow();
}
}
}
I'm coming back to this personal project after hacking at this problem for a while and then leaving it for a couple of months, so if you see something particularly odd, no, I don't remember why I did it ... if you need any more info let me know.
