static bool ClearDfrFrameBuffer(IntPtr deviceHandle)
{
return(IoCtl.DeviceIoControl(
deviceHandle,
DfrHostIo.IOCTL_DFR_CLEAR_FRAMEBUFFER,
IntPtr.Zero,
0,
IntPtr.Zero,
0,
IntPtr.Zero,
IntPtr.Zero
));
}
static unsafe bool DrawBitmap(IntPtr deviceHandle, string file, ushort x, ushort y)
{
ushort width = 0, height = 0;
var bResult = false;
try
{
using (var bitmap = new Bitmap(file))
{
if (bitmap.Width > ushort.MaxValue || bitmap.Height > ushort.MaxValue)
{
System.Console.Write("Image too large");
return(false);
}
width = (ushort)bitmap.Width;
height = (ushort)bitmap.Height;
int requestSize = bitmap.Width * bitmap.Height * 3 +
Marshal.SizeOf(typeof(DFR_HOSTIO_UPDATE_FRAMEBUFFER_HEADER));
// Memory stream for FrameBuffer update request
IntPtr requestPtr = Marshal.AllocHGlobal(requestSize);
if (requestPtr == IntPtr.Zero)
{
System.Console.Write("Failed to allocate memory for FrameBuffer");
return(false);
}
byte *requestBytePtr = (byte *)requestPtr.ToPointer();
UnmanagedMemoryStream requestStream = new UnmanagedMemoryStream(requestBytePtr, requestSize, requestSize, FileAccess.Write);
using (var binaryWriter = new BinaryWriter(requestStream))
{
binaryWriter.Write(x);
binaryWriter.Write(y);
binaryWriter.Write(width);
binaryWriter.Write(height);
binaryWriter.Write(DfrHostIo.DFR_FRAMEBUFFER_FORMAT);
binaryWriter.Write((uint)0);
for (int w = 0; w < bitmap.Width; w++)
{
for (int h = bitmap.Height - 1; h >= 0; h--)
{
var pixel = bitmap.GetPixel(w, h);
binaryWriter.Write(pixel.R);
binaryWriter.Write(pixel.G);
binaryWriter.Write(pixel.B);
}
}
binaryWriter.Flush();
bResult = IoCtl.DeviceIoControl(
deviceHandle,
DfrHostIo.IOCTL_DFR_UPDATE_FRAMEBUFFER,
requestPtr,
requestSize,
IntPtr.Zero,
0,
IntPtr.Zero,
IntPtr.Zero
);
}
Marshal.FreeHGlobal(requestPtr);
}
}
catch (Exception exc)
{
System.Console.Write($"Exception caught: {exc}");
}
return(bResult);
}