Visual Basic

Kobi_Z wrote:

i was told there is a simpler way to do that.

public class FastBitmapEditor
    {
        public int Height;
        public int Width;
        public Bitmap bitmap;
        byte[] bits;
        GCHandle handle;
        int stride;
        int pixelFormatSize;


        public FastBitmapEditor(int width, int height)
        {
            Width = width;
            Height = height;
            PixelFormat format = PixelFormat.Format32bppArgb;
            pixelFormatSize = Image.GetPixelFormatSize(format) / 8;
            stride = width * pixelFormatSize;
            bits = new byte[stride * height];
            handle = GCHandle.Alloc(bits, GCHandleType.Pinned);
            IntPtr pointer = Marshal.UnsafeAddrOfPinnedArrayElement(bits, 0);
            bitmap = new Bitmap(width, height, stride, format, pointer);
        }

        public Color GetPixel(int x, int y)
        {
            int blue = bits[(y * Width + x) * 4];

            int green = bits[(y * Width + x) * 4 + 1];

            int red = bits[(y * Width + x) * 4 + 2];

            int alpha = bits[(y * Width + x) * 4 + 3];

            return Color.FromArgb(alpha, red, green, blue);
        }
}