public static unsafe void CopyPixels(BitmapSource source, PixelColor[,] pixels, int stride, int offset)
{
fixed (PixelColor* buffer = &pixels[0, 0])
source.CopyPixels(
new Int32Rect(0, 0, source.PixelWidth, source.PixelHeight),
(IntPtr)(buffer + offset),
pixels.GetLength(0) * pixels.GetLength(1) * sizeof(PixelColor),
stride);
}
public static PixelColor[,] GetPixels(BitmapSource source)
{
if (source.Format != PixelFormats.Bgra32)
source = new FormatConvertedBitmap(source, PixelFormats.Bgra32, null, 0);
int width = source.PixelWidth;
int height = source.PixelHeight;
PixelColor[,] result = new PixelColor[width, height];
BitmapSourceHelper.CopyPixels(source, result, width * 4, 0);
return result;
}
public static void CopyPixels(this BitmapSource source, PixelColor[,] pixels, int stride, int offset)
{
var height = source.PixelHeight;
var width = source.PixelWidth;
var pixelBytes = new byte[height * width * 4];
source.CopyPixels(pixelBytes, stride, 0);
int y0 = offset / width;
int x0 = offset - width * y0;
for (int y = 0; y < height; y++)
for (int x = 0; x < width; x++)
pixels[x + x0, y + y0] = new PixelColor
{
Blue = pixelBytes[(y * width + x) * 4 + 0],
Green = pixelBytes[(y * width + x) * 4 + 1],
Red = pixelBytes[(y * width + x) * 4 + 2],
Alpha = pixelBytes[(y * width + x) * 4 + 3],
};
}