public static void Read32BitImage(byte[] intermediateImage, BitmapSource src, int srcX, int srcY, int stride, int width, int height)
{
System.Diagnostics.Debug.Assert(src.Format.BitsPerPixel == 32);
int[] pix = new int[width * height];
src.CopyPixels(new Int32Rect(srcX, srcY, width, height), pix, width * sizeof(int), 0);
int si = 0;
int di0 = 0;
for (int y = 0; y < height; ++y, di0 += stride)
{
int di = di0;
for (int x = 0; x < width; ++x, ++si, ++di)
{
int p = pix[si];
intermediateImage[di] = BadgeImage.ToGray((p >> 16) & 0xFF, (p >> 8) & 0xFF, (p >> 0) & 0xFF);
}
}
}
public static void ReadBitmap(byte[] intermediateImage, Bitmap bitmap, int srcX, int srcY, int stride, int width, int height)
{
var data = bitmap.LockBits(
new System.Drawing.Rectangle(srcX, srcY, width, height),
ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppRgb);
try
{
IntPtr p0 = data.Scan0;
for (int y = 0, i0 = 0; y < height; ++y, p0 += data.Stride, i0 += stride)
{
IntPtr p = p0;
for (int x = 0, i = i0; x < width; ++x, ++i, p += 4)
{
int val = Marshal.ReadInt32(p);
intermediateImage[i] = BadgeImage.ToGray((val >> 16) & 0xFF, (val >> 8) & 0xFF, (val >> 0) & 0xFF);
}
}
}
finally
{
bitmap.UnlockBits(data);
}
}
