private static byte[] GetPixels(RenderTargetBitmap rtb, int width, int height)
{
int num = width * 4;
FormatConvertedBitmap formatConvertedBitmap = new FormatConvertedBitmap();
formatConvertedBitmap.BeginInit();
formatConvertedBitmap.Source = rtb;
formatConvertedBitmap.DestinationFormat = PixelFormats.Bgra32;
formatConvertedBitmap.EndInit();
byte[] array = new byte[num * height];
formatConvertedBitmap.CriticalCopyPixels(Int32Rect.Empty, array, num, 0);
return(array);
}
/// <summary>
/// Get bitmap pixel data in Bgra32 format from a custom Drawing.
/// </summary>
/// <param name="rtb">A bitmap</param>
/// <param name="width">Bitmap width</param>
/// <param name="height">Bitmap height</param>
/// <returns></returns>
private static byte[] GetPixels(RenderTargetBitmap rtb, int width, int height)
{
int strideColorBitmap = width * 4 /* 32 BitsPerPixel */;
// Convert the bitmap from Pbgra32 to Bgra32
FormatConvertedBitmap converter = new FormatConvertedBitmap();
converter.BeginInit();
converter.Source = rtb;
converter.DestinationFormat = PixelFormats.Bgra32;
converter.EndInit();
byte[] pixels = new byte[strideColorBitmap * height];
// Call the internal method which skips the MediaPermission Demand
converter.CriticalCopyPixels(Int32Rect.Empty, pixels, strideColorBitmap, 0);
return(pixels);
}
private byte[] GetDecodedPixels(Int32Rect bounds)
{
Debug.Assert(
(bounds.X >= 0) &&
(bounds.Y >= 0) &&
((bounds.X + bounds.Width) <= _pixelWidth) &&
((bounds.Y + bounds.Height) <= _pixelHeight)
);
int stride = bounds.Width * 4;
byte[] pixels = new Byte[stride * bounds.Height];
FormatConvertedBitmap converter = new FormatConvertedBitmap();
converter.BeginInit();
converter.Source = _image;
converter.DestinationFormat = PixelFormats.Pbgra32;
converter.EndInit();
converter.CriticalCopyPixels(bounds, pixels, stride, 0);
return(pixels);
}