/// <summary>
/// Saves the window contents to a stream.
/// </summary>
/// <param name="stream">Stream to write the window contents to.</param>
public override void Save(Stream stream, PixelFormat requestedFormat)
{
D3D.Device device = driver.Device;
DisplayMode mode = device.DisplayMode;
SurfaceDescription desc = new SurfaceDescription();
desc.Width = mode.Width;
desc.Height = mode.Height;
desc.Format = Format.A8R8G8B8;
// create a temp surface which will hold the screen image
Surface surface = device.CreateOffscreenPlainSurface(
mode.Width, mode.Height, Format.A8R8G8B8, Pool.SystemMemory);
// get the entire front buffer. This is SLOW!!
device.GetFrontBufferData(0, surface);
// if not fullscreen, the front buffer contains the entire desktop image. we need to grab only the portion
// that contains our render window
if (!IsFullScreen)
{
// whatever our target control is, we need to walk up the chain and find the parent form
Form form = windowHandle.FindForm();
// get the actual screen location of the form
System.Drawing.Rectangle rect = form.RectangleToScreen(form.ClientRectangle);
desc.Width = width;
desc.Height = height;
desc.Format = Format.A8R8G8B8;
// create a temp surface that is sized the same as our target control
Surface tmpSurface = device.CreateOffscreenPlainSurface(rect.Width, rect.Height, Format.A8R8G8B8, Pool.Default);
// copy the data from the front buffer to the window sized surface
device.UpdateSurface(surface, rect, tmpSurface);
// dispose of the prior surface
surface.Dispose();
surface = tmpSurface;
}
int pitch;
// lock the surface to grab the data
GraphicsStream graphStream = surface.LockRectangle(LockFlags.ReadOnly | LockFlags.NoSystemLock, out pitch);
// create an RGB buffer
byte[] buffer = new byte[width * height * 3];
int offset = 0, line = 0, count = 0;
// gotta copy that data manually since it is in another format (sheesh!)
unsafe {
byte *data = (byte *)graphStream.InternalData;
for (int y = 0; y < desc.Height; y++)
{
line = y * pitch;
for (int x = 0; x < desc.Width; x++)
{
offset = x * 4;
int pixel = line + offset;
// Actual format is BRGA for some reason
buffer[count++] = data[pixel + 2];
buffer[count++] = data[pixel + 1];
buffer[count++] = data[pixel + 0];
}
}
}
surface.UnlockRectangle();
// dispose of the surface
surface.Dispose();
// gotta flip the image real fast
Image image = Image.FromDynamicImage(buffer, width, height, PixelFormat.R8G8B8);
image.FlipAroundX();
// write the data to the stream provided
stream.Write(image.Data, 0, image.Data.Length);
}
