public void WritePixels(Array pixelsArray)
{
if (pixelsArray == null)
{
throw new ArgumentNullException("pixelsArray");
}
Type itemType = pixelsArray.GetType().GetElementType();
int itemSize = Marshal.SizeOf(itemType);
int arrayRank = pixelsArray.Rank, counter = 0, bytesCount = 0, arraySize = 0;
for (; counter < arrayRank; counter += 1)
{
arraySize = pixelsArray.GetLength(counter);
bytesCount += arraySize * itemSize;
}
using (DisposableHandle arrayHandle = DisposableHandle.Alloc(pixelsArray))
{
NTInvoke.CopyUnmanagedMemory(RawDataPtr, arrayHandle, bytesCount);
}
}
internal unsafe static void Main(string[] args)
{
try
{
int pixelsCount = 1 << 18;
uint[] pixelsArray = new uint[65536];
using (DisposableHandle handle = DisposableHandle.Alloc(pixelsArray))
{
NTInvoke.SetUnmanagedMemory(handle, 255, pixelsCount);
}
byte[] outputData = null;
MCvScalar redColor = MCvScalarExtensions.FromColor(Colors.Red);
MCvScalar greenColor = MCvScalarExtensions.FromColor(Colors.Green);
using (PresentationImage prImage = new PresentationImage(256, 256))
{
prImage.WritePixels(pixelsArray);
FontFace[] faces = new FontFace[]
{
FontFace.HersheyComplex,
FontFace.HersheyComplexSmall,
FontFace.HersheyDuplex,
FontFace.HersheyPlain,
FontFace.HersheyScriptComplex,
FontFace.HersheyScriptSimplex,
FontFace.HersheySimplex,
FontFace.HersheyTriplex
};
Parallel.For(0, 8, (int index) =>
{
Point drawPoint = new Point(10, 30 + 30 * index);
FontFace drawFace = faces[index];
string outputText = Enum.GetName(typeof(FontFace), drawFace);
CvInvoke.DrawText(prImage, outputText, drawPoint, drawFace, 1.0D, redColor, 1);
});
outputData = CvInvoke.Imencode(prImage, ImageEncoding.Jpeg, new int[] { 95 });
}
if (outputData != null && outputData.Length > 0)
{
using (MemoryStream dataStream = new MemoryStream(outputData))
{
JpegBitmapDecoder decoder = new JpegBitmapDecoder(dataStream, BitmapCreateOptions.DelayCreation, BitmapCacheOption.OnLoad);
BitmapFrame frame = decoder.Frames[0];
Window imageWindow = new Window()
{
Height = 300.0D,
Width = 500.0D,
Title = "Image window",
ResizeMode = ResizeMode.CanResize,
WindowStartupLocation = WindowStartupLocation.CenterScreen
};
imageWindow.Content = new Image()
{
Source = frame
};
new Application().Run(imageWindow);
}
}
}
catch (Exception exc)
{
Debug.WriteLine("\tCatched exception: {0}\r\n{1}", exc.Message, exc);
}
finally
{
Debug.WriteLine("\tData released succesfully.");
}
}
