public ImageContext MakeBitmap()
{
BitmapImage myBitmapImage = new BitmapImage();
myBitmapImage.BeginInit();
myBitmapImage.UriSource = new Uri(@text1.Text);
myBitmapImage.EndInit();
myImage.Source = myBitmapImage;
ImageContext inSource = new ImageContext(myBitmapImage.PixelHeight, myBitmapImage.PixelWidth, myBitmapImage.Format);
myBitmapImage.CopyPixels(inSource.PixelByteArray, inSource.NStride, 0);
return inSource;
}
public BitmapSource MakeGray(ImageContext inSource)
{
ImageContext outSource = inSource;
byte middle;
for (int i = 0; i < inSource.PixelByteArraySize; i += 4)
{
middle = (byte)((inSource.PixelByteArray[i + 1] + inSource.PixelByteArray[i + 2] + inSource.PixelByteArray[i + 3]) / 3);
outSource.PixelByteArray[i] = outSource.PixelByteArray[i + 1] = outSource.PixelByteArray[i + 2] = middle;
inSource.PixelByteArray[i + 3] = 0;
}
var bitmap = BitmapSource.Create(outSource.Width, outSource.Height, 96d, 96d, PixelFormats.Cmyk32, null, outSource.PixelByteArray, outSource.NStride);
myImage.Source = bitmap;
return bitmap;
}
