Byte[] GetBytes <T>(OverlayMsg header, T message)
{
Marshal.StructureToPtr(header, readPtr, true);
IntPtr adjustedPtr = new IntPtr(readPtr.ToInt64() + headerLength);
Marshal.StructureToPtr(message, adjustedPtr, true);
Marshal.Copy(readPtr, readBuffer, 0, (Int32)OverlayConstants.OVERLAY_STRUCT_LENGTH);
return(readBuffer);
}
public void writeTo <T>(NamedPipeClientStream pipe, OverlayMsgType type, T message)
{
OverlayMsg header = new OverlayMsg();
Int32 typeLength = Marshal.SizeOf(typeof(T));
header.overlayMsgHeader.magic = OverlayConstants.OVERLAY_MAGIC_NUMBER;
header.overlayMsgHeader.length = typeLength;
header.overlayMsgHeader.type = type;
pipe.Write(GetBytes(header, message), 0, headerLength + typeLength);
}
public void WaitForRead()
{
try
{
while (overlayPipe.CanRead && overlayPipe.IsConnected)
{
OverlayMsg header = buffer.readHeaderFrom(overlayPipe);
Int32 typeLength = header.overlayMsgHeader.length;
switch (header.overlayMsgHeader.type)
{
case OverlayMsgType.Shmem:
{
var shmem = buffer.readFrom <OverlayMsgShmem>(overlayPipe, typeLength);
String shmemKey = null;
unsafe
{
// length - 1 to remove trailing \0
shmemKey = new String(shmem.name, 0, typeLength - 1);
}
if (shmemKey != null)
{
bitmap.UpdateSharedMemoryKey(shmemKey);
}
else
{
API.Instance.Log("Unable to decode shmem key");
continue;
}
break;
}
case OverlayMsgType.Blit:
{
var blit = buffer.readFrom <OverlayMsgBlit>(overlayPipe, typeLength);
if (blit.x + blit.width > bitmap.Width ||
blit.y + blit.height > bitmap.Height)
{
API.Instance.Log("Invalid width and height of blit request; Expected w={0},h={1} got w={2},h={3}",
bitmap.Width,
bitmap.Height,
blit.x + blit.width,
blit.y + blit.height);
break;
}
frameCount++;
if (!bitmap.Fetch())
{
API.Instance.Log("Fetch of bitmap from shared memory failed");
}
float elapsed = (float)(stopwatch.Elapsed.TotalMilliseconds - lastFpsUpdate) / 1000;
if (elapsed > OverlayConstants.OVERLAY_FPS_INTERVAL)
{
OverlayMsgFps fps = new OverlayMsgFps();
// really? int?
fps.fps = (float)frameCount / elapsed;
buffer.writeTo(overlayPipe, OverlayMsgType.Fps, fps);
frameCount = 0;
lastFpsUpdate = 0;
stopwatch.Restart();
}
break;
}
case OverlayMsgType.Active:
{
var active = buffer.readFrom <OverlayMsgActive>(overlayPipe, typeLength);
break;
}
}
}
}
catch (ThreadAbortException e)
{
API.Instance.Log("OverlayHookThread aborted; {0}", e.Message);
}
}
