public void convertRect(int l, int t, int w, int h, INyARGrayscaleRaster o_raster)
        {
            int[] wk        = this._wk;
            int   b         = t + h;
            int   pix_count = w;

            switch (o_raster.getBufferType())
            {
            default:
                INyARRgbRaster in_drv = this._ref_raster;
                for (int y = t; y < b; y++)
                {
                    for (int x = pix_count - 1; x >= 0; x--)
                    {
                        in_drv.getPixel(x, y, wk);
                        o_raster.setPixel(x, y, (wk[0] + wk[1] + wk[2]) / 3);
                    }
                }
                return;
            }
        }
        public void convertRect(int l, int t, int w, int h, INyARGrayscaleRaster o_raster)
        {
            byte[]      work            = this._work;
            BitmapData  bm              = this._ref_raster.lockBitmap();
            NyARIntSize size            = this._ref_raster.getSize();
            int         bp              = (l + t * size.w) * 4 + (int)bm.Scan0;
            int         b               = t + h;
            int         row_padding_dst = (size.w - w);
            int         row_padding_src = row_padding_dst * 4;
            int         pix_count       = w;
            int         pix_mod_part    = pix_count - (pix_count % 8);
            int         dst_ptr         = t * size.w + l;

            // in_buf = (byte[])this._ref_raster.getBuffer();
            switch (o_raster.getBufferType())
            {
            case NyARBufferType.INT1D_GRAY_8:
                int[] out_buf = (int[])o_raster.getBuffer();
                for (int y = t; y < b; y++)
                {
                    int x = 0;
                    for (x = pix_count - 1; x >= pix_mod_part; x--)
                    {
                        int p = Marshal.ReadInt32((IntPtr)bp);
                        out_buf[dst_ptr++] = (((p >> 16) & 0xff) + ((p >> 8) & 0xff) + (p & 0xff)) / 3;
                        bp += 4;
                    }
                    for (; x >= 0; x -= 8)
                    {
                        Marshal.Copy((IntPtr)bp, work, 0, 32);
                        out_buf[dst_ptr++] = (work[0] + work[1] + work[2]) / 3;
                        out_buf[dst_ptr++] = (work[4] + work[5] + work[6]) / 3;
                        out_buf[dst_ptr++] = (work[8] + work[9] + work[10]) / 3;
                        out_buf[dst_ptr++] = (work[12] + work[13] + work[14]) / 3;
                        out_buf[dst_ptr++] = (work[16] + work[17] + work[18]) / 3;
                        out_buf[dst_ptr++] = (work[20] + work[21] + work[22]) / 3;
                        out_buf[dst_ptr++] = (work[24] + work[25] + work[26]) / 3;
                        out_buf[dst_ptr++] = (work[28] + work[29] + work[30]) / 3;
                        bp += 32;
                    }
                    bp      += row_padding_src;
                    dst_ptr += row_padding_dst;
                }
                this._ref_raster.unlockBitmap();
                return;

            default:
                for (int y = t; y < b; y++)
                {
                    for (int x = 0; x < pix_count; x++)
                    {
                        int p = Marshal.ReadInt32((IntPtr)bp);
                        o_raster.setPixel(x, y, (((p >> 16) & 0xff) + ((p >> 8) & 0xff) + (p & 0xff)) / 3);
                        bp += 4;
                    }
                    bp += row_padding_src;
                }
                this._ref_raster.unlockBitmap();
                return;
            }
        }
        public void convertRect(int l, int t, int w, int h, INyARGrayscaleRaster o_raster)
        {
            Color32[]   c               = (Color32[])(this._ref_raster.getBuffer());
            NyARIntSize size            = this._ref_raster.getSize();
            int         src             = (l + t * size.w) * 4;
            int         b               = t + h;
            int         row_padding_dst = (size.w - w);
            int         row_padding_src = row_padding_dst * 4;
            int         pix_count       = w;
            int         pix_mod_part    = pix_count - (pix_count % 8);

            // in_buf = (byte[])this._ref_raster.getBuffer();
            switch (o_raster.getBufferType())
            {
            case NyARBufferType.INT1D_GRAY_8:
                int[] out_buf = (int[])o_raster.getBuffer();
                int   dst_ptr;
                if (this._is_inverse)
                {
                    dst_ptr          = (h - 1 - t) * size.w + l;
                    row_padding_dst -= size.w * 2;
                }
                else
                {
                    dst_ptr = t * size.w + l;
                }
                for (int y = t; y < b; y++)
                {
                    int     x = 0;
                    Color32 p;
                    for (x = pix_count - 1; x >= pix_mod_part; x--)
                    {
                        p = c[src++];
                        out_buf[dst_ptr++] = (p.r + p.g + p.b) / 3;
                    }
                    for (; x >= 0; x -= 8)
                    {
                        p = c[src++];
                        out_buf[dst_ptr++] = (p.r + p.g + p.b) / 3;
                        p = c[src++];
                        out_buf[dst_ptr++] = (p.r + p.g + p.b) / 3;
                        p = c[src++];
                        out_buf[dst_ptr++] = (p.r + p.g + p.b) / 3;
                        p = c[src++];
                        out_buf[dst_ptr++] = (p.r + p.g + p.b) / 3;
                        p = c[src++];
                        out_buf[dst_ptr++] = (p.r + p.g + p.b) / 3;
                        p = c[src++];
                        out_buf[dst_ptr++] = (p.r + p.g + p.b) / 3;
                        p = c[src++];
                        out_buf[dst_ptr++] = (p.r + p.g + p.b) / 3;
                        p = c[src++];
                        out_buf[dst_ptr++] = (p.r + p.g + p.b) / 3;
                    }
                    dst_ptr += row_padding_dst;
                    src     += row_padding_src;
                }
                return;

            default:
                for (int y = t; y < b; y++)
                {
                    for (int x = 0; x < pix_count; x++)
                    {
                        Color32 p = c[src++];
                        o_raster.setPixel(x, y, (p.r + p.g + p.b) / 3);
                    }
                    src += row_padding_src;
                }
                return;
            }
        }
        public void convertRect(int l, int t, int w, int h, INyARGrayscaleRaster o_raster)
        {
            NyARIntSize size            = this._ref_raster.getSize();
            int         bp              = (l + t * size.w) * 3;
            int         b               = t + h;
            int         row_padding_dst = (size.w - w);
            int         row_padding_src = row_padding_dst * 3;
            int         pix_count       = w;
            int         pix_mod_part    = pix_count - (pix_count % 8);
            int         dst_ptr         = t * size.w + l;

            byte[] in_buf = (byte[])this._ref_raster.getBuffer();
            switch (o_raster.getBufferType())
            {
            case NyARBufferType.INT1D_GRAY_8:
                int[] out_buf = (int[])o_raster.getBuffer();
                for (int y = t; y < b; y++)
                {
                    int x = 0;
                    for (x = pix_count - 1; x >= pix_mod_part; x--)
                    {
                        out_buf[dst_ptr++] = ((in_buf[bp] & 0xff) + (in_buf[bp + 1] & 0xff) + (in_buf[bp + 2] & 0xff)) / 3;
                        bp += 3;
                    }
                    for (; x >= 0; x -= 8)
                    {
                        out_buf[dst_ptr++] = ((in_buf[bp] & 0xff) + (in_buf[bp + 1] & 0xff) + (in_buf[bp + 2] & 0xff)) / 3;
                        bp += 3;
                        out_buf[dst_ptr++] = ((in_buf[bp] & 0xff) + (in_buf[bp + 1] & 0xff) + (in_buf[bp + 2] & 0xff)) / 3;
                        bp += 3;
                        out_buf[dst_ptr++] = ((in_buf[bp] & 0xff) + (in_buf[bp + 1] & 0xff) + (in_buf[bp + 2] & 0xff)) / 3;
                        bp += 3;
                        out_buf[dst_ptr++] = ((in_buf[bp] & 0xff) + (in_buf[bp + 1] & 0xff) + (in_buf[bp + 2] & 0xff)) / 3;
                        bp += 3;
                        out_buf[dst_ptr++] = ((in_buf[bp] & 0xff) + (in_buf[bp + 1] & 0xff) + (in_buf[bp + 2] & 0xff)) / 3;
                        bp += 3;
                        out_buf[dst_ptr++] = ((in_buf[bp] & 0xff) + (in_buf[bp + 1] & 0xff) + (in_buf[bp + 2] & 0xff)) / 3;
                        bp += 3;
                        out_buf[dst_ptr++] = ((in_buf[bp] & 0xff) + (in_buf[bp + 1] & 0xff) + (in_buf[bp + 2] & 0xff)) / 3;
                        bp += 3;
                        out_buf[dst_ptr++] = ((in_buf[bp] & 0xff) + (in_buf[bp + 1] & 0xff) + (in_buf[bp + 2] & 0xff)) / 3;
                        bp += 3;
                    }
                    bp      += row_padding_src;
                    dst_ptr += row_padding_dst;
                }
                return;

            default:
                for (int y = t; y < b; y++)
                {
                    for (int x = 0; x < pix_count; x++)
                    {
                        o_raster.setPixel(x, y, ((in_buf[bp] & 0xff) + (in_buf[bp + 1] & 0xff) + (in_buf[bp + 2] & 0xff)) / 3);
                        bp += 3;
                    }
                    bp += row_padding_src;
                }
                return;
            }
        }