C# - Remove Bitmap padding

Question

I was wondering if there\'s a way in order to remove the padding generated by the 24 bit Bitmap for each scan line.

What I mean is like this :

Original [Pure

Answer 1

You should copy the bitmap line by line, but skip padding bytes. An extension method for that would be:

static class BitmapExtensions
{
    public static void RemovePadding(this Bitmap bitmap)
    {
        int bytesPerPixel = Image.GetPixelFormatSize(bitmap.PixelFormat) / 8;

        BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.ReadOnly, bitmap.PixelFormat);
        var pixels = new byte[bitmapData.Width * bitmapData.Height * bytesPerPixel];

        for (int row = 0; row < bitmapData.Height; row++)
        {
            var dataBeginPointer = IntPtr.Add(bitmapData.Scan0, row * bitmapData.Stride);
            Marshal.Copy(dataBeginPointer, pixels, row * bitmapData.Width * bytesPerPixel, bitmapData.Width * bytesPerPixel);
        }

        Marshal.Copy(pixels, 0, bitmapData.Scan0, pixels.Length);
        bitmap.UnlockBits(bitmapData);
    }
}