AForge.Imaging.Filters.BackwardQuadrilateralTransformation.ProcessFilter C# (CSharp) Метод

        protected override unsafe void ProcessFilter( UnmanagedImage image )
        {
            if ( destinationQuadrilateral == null )
                throw new NullReferenceException( "Destination quadrilateral was not set." );

            // check overlay type
            if ( sourceImage != null )
            {
                // source and destination images must have same pixel format
                if ( image.PixelFormat != sourceImage.PixelFormat )
                    throw new InvalidImagePropertiesException( "Source and destination images must have same pixel format." );

                // lock source image
                BitmapData srcData = sourceImage.LockBits(
                    new Rectangle( 0, 0, sourceImage.Width, sourceImage.Height ),
                    ImageLockMode.ReadOnly, sourceImage.PixelFormat );

                try
                {
                    ProcessFilter( image, new UnmanagedImage( srcData ) );
                }
                finally
                {
                    // unlock source image
                    sourceImage.UnlockBits( srcData );
                }
            }
            else if ( sourceUnmanagedImage != null )
            {
                // source and destination images must have same pixel format
                if ( image.PixelFormat != sourceUnmanagedImage.PixelFormat )
                    throw new InvalidImagePropertiesException( "Source and destination images must have same pixel format." );

                ProcessFilter( image, sourceUnmanagedImage );
            }
            else
            {
                throw new NullReferenceException( "Source image is not set." );
            }
        }