public String GenerateUnicode(Bitmap source, String spacingChar)
{
//Check status
if (IsErrorOccurred())
{
return(String.Empty);
}
//Create Cl memory
ClImage2D srcMem = new ClImage2D(source, context, IOMode.ReadOnly, ChannelType.RGBA32bpp, out error);
int totalUnicodeLength = (srcMem.Width / 2 + 2) * (srcMem.Height / 4);
ClBuffer <short> dstMem = new ClBuffer <short>(context, totalUnicodeLength, out error);
//Check error
if (!srcMem.Ready || !dstMem.Ready || IsErrorOccurred())
{
srcMem.Dispose();
dstMem.Dispose();
return(String.Empty);
}
//Run kernel
kernelGenerateUnicode.ExecuteKernel(out error, new object[] { srcMem, dstMem });
if (IsErrorOccurred())
{
return(String.Empty);
}
//Marshaling unicode data.
IntPtr stream = Marshal.AllocHGlobal(totalUnicodeLength * 2);
Marshal.Copy(dstMem.GetBuffer(), 0, stream, totalUnicodeLength);
string result = Marshal.PtrToStringUni(stream, totalUnicodeLength);
//Replace spacing char
result = result.Replace(((char)0x2800).ToString(), spacingChar);
//Clean up
srcMem.Dispose();
dstMem.Dispose();
return(result);
}
protected override void OnPostExecute(out ErrorCode error, params object[] args)
{
ClBuffer <short> destination = (ClBuffer <short>)args[1];
EnqueueReadBuffer(destination.GetClMem, destination.GetBuffer(), out error);
}