ImageProcessor.Imaging.FastBitmap.LockBitmap C# (CSharp) Метод

        private void LockBitmap()
        {
            Rectangle bounds = new Rectangle(Point.Empty, this.bitmap.Size);

            // Figure out the number of bytes in a row. This is rounded up to be a multiple
            // of 4 bytes, since a scan line in an image must always be a multiple of 4 bytes
            // in length.
            this.pixelSize = Image.GetPixelFormatSize(this.bitmap.PixelFormat) / 8;
            this.bytesInARow = bounds.Width * this.pixelSize;
            if (this.bytesInARow % 4 != 0)
            {
                this.bytesInARow = 4 * ((this.bytesInARow / 4) + 1);
            }

            // Lock the bitmap
            this.bitmapData = this.bitmap.LockBits(bounds, ImageLockMode.ReadWrite, this.bitmap.PixelFormat);

            // Set the value to the first scan line
            this.pixelBase = (byte*)this.bitmapData.Scan0.ToPointer();

            if (this.computeIntegrals)
            {
                // Allocate values for integral image calculation.
                this.normalWidth = this.width + 1;
                int normalHeight = this.height + 1;

                this.tiltedWidth = this.width + 2;
                int tiltedHeight = this.height + 2;

                this.normalSumImage = new long[normalHeight, this.normalWidth];
                this.normalSumHandle = GCHandle.Alloc(this.normalSumImage, GCHandleType.Pinned);
                this.normalSum = (long*)this.normalSumHandle.AddrOfPinnedObject().ToPointer();

                this.squaredSumImage = new long[normalHeight, this.normalWidth];
                this.squaredSumHandle = GCHandle.Alloc(this.squaredSumImage, GCHandleType.Pinned);
                this.squaredSum = (long*)this.squaredSumHandle.AddrOfPinnedObject().ToPointer();

                if (this.computeTilted)
                {
                    this.tiltedSumImage = new long[tiltedHeight, this.tiltedWidth];
                    this.tiltedSumHandle = GCHandle.Alloc(this.tiltedSumImage, GCHandleType.Pinned);
                    this.tiltedSum = (long*)this.tiltedSumHandle.AddrOfPinnedObject().ToPointer();
                }

                this.CalculateIntegrals();
            }
        }