/// <summary>
/// Extract the player image
/// </summary>
/// <param name="colorInfo">The color information</param>
private void WriteColorPixels(ColorImageFrameInfo colorInfo)
{
if (_colorBitmap == null)
{
_colorBitmap = new WriteableBitmap(colorInfo.Width, colorInfo.Height,
96.0, 96.0, PixelFormats.Bgr32,
null);
}
// Write the color pixel data into our bitmap
_colorBitmap.WritePixels(
new Int32Rect(0, 0, _colorBitmap.PixelWidth, _colorBitmap.PixelHeight),
colorInfo.FrameData,
_colorBitmap.PixelWidth * sizeof(int), 0);
}
/// <summary>
/// Do the image composition
/// </summary>
/// <param name="tuple">The depth and color information</param>
/// <param name="image">The background image</param>
private void Merge(Tuple <DepthImageFrameInfo, ColorImageFrameInfo> tuple, BitmapSource image)
{
//No background
if (image == null)
{
return;
}
DepthImageFrameInfo depthInfo = tuple.Item1;
ColorImageFrameInfo colorInfo = tuple.Item2;
//Initiate buffer
if (_greenScreenPixelData.Length != depthInfo.DepthStreamFramePixelDataLength)
{
_greenScreenPixelData = new int[depthInfo.DepthStreamFramePixelDataLength];
}
Array.Clear(_greenScreenPixelData, 0, _greenScreenPixelData.Length);
//Initiate buffer
if (_colorCoordinates.Length != depthInfo.DepthStreamFramePixelDataLength)
{
_colorCoordinates = new ColorImagePoint[depthInfo.DepthStreamFramePixelDataLength];
}
Array.Clear(_colorCoordinates, 0, _colorCoordinates.Length);
_kinectManager.MapDepthFrameToColorFrame(
depthInfo.Format,
depthInfo.FrameData,
colorInfo.Format,
_colorCoordinates);
// loop over each row and column of the depth
for (int y = 0; y < depthInfo.Height; ++y)
{
WritePlayersMask(depthInfo, y);
}
WriteColorPixels(colorInfo);
//Use the bigger image as the size for the resulting picture
int width = Math.Max(colorInfo.Width, image.PixelWidth);
int height = Math.Max(colorInfo.Height, image.PixelHeight);
// create a render target that we'll render our images to
var renderBitmap = new RenderTargetBitmap(width, height,
96.0, 96.0, PixelFormats.Pbgra32);
var imageBrushSource = new ImageBrush
{
ImageSource = image,
Stretch = Stretch.Fill,
TileMode = TileMode.None,
AlignmentX = AlignmentX.Left,
AlignmentY = AlignmentY.Top,
Opacity = 1,
};
var imageBrushMask = new ImageBrush
{
ImageSource = _playerOpacityMaskImage,
Stretch = Stretch.UniformToFill,
TileMode = TileMode.None,
AlignmentX = AlignmentX.Left,
AlignmentY = AlignmentY.Top,
Opacity = 1,
};
var imageBrushPlayer = new ImageBrush
{
ImageSource = _colorBitmap,
Stretch = Stretch.UniformToFill,
TileMode = TileMode.None,
AlignmentX = AlignmentX.Left,
AlignmentY = AlignmentY.Top,
Opacity = 1,
};
var drawingVisual = new DrawingVisual();
//Compose images
using (DrawingContext dc = drawingVisual.RenderOpen())
{
dc.DrawRectangle(imageBrushSource, null /* no pen */,
new Rect(0, 0, width, height));
dc.PushOpacityMask(imageBrushMask);
dc.DrawRectangle(imageBrushPlayer, null /* no pen */,
new Rect(0, 0, width,
height));
}
var result = new RenderTargetBitmap(width,
height,
renderBitmap.DpiX, renderBitmap.DpiY,
renderBitmap.Format);
result.Render(drawingVisual);
//Make it thread context free
result.Freeze();
//broadcast the result
_resultBlock.SendAsync(result);
}
