Axiom.RenderSystems.OpenGL.OpenTKWindow.CopyContentsToMemory C# (CSharp) Метод

		public override void CopyContentsToMemory( PixelBox dst, FrameBuffer buffer )
		{
			if ( ( dst.Left < 0 ) || ( dst.Right > Width ) ||
				( dst.Top < 0 ) || ( dst.Bottom > Height ) ||
				( dst.Front != 0 ) || ( dst.Back != 1 ) )
			{
				throw new Exception( "Invalid box." );
			}
			if ( buffer == RenderTarget.FrameBuffer.Auto )
			{
				buffer = IsFullScreen ? RenderTarget.FrameBuffer.Front : RenderTarget.FrameBuffer.Back;
			}

			int format = GLPixelUtil.GetGLOriginFormat( dst.Format );
			int type = GLPixelUtil.GetGLOriginDataType( dst.Format );

			if ( ( format == Gl.GL_NONE ) || ( type == 0 ) )
			{
				throw new Exception( "Unsupported format." );
			}

			// Switch context if different from current one
			RenderSystem rsys = Root.Instance.RenderSystem;
			rsys.Viewport = GetViewport( 0 );

			// Must change the packing to ensure no overruns!
			Gl.glPixelStorei( Gl.GL_PACK_ALIGNMENT, 1 );

			Gl.glReadBuffer( ( buffer == RenderTarget.FrameBuffer.Front ) ? Gl.GL_FRONT : Gl.GL_BACK );
			Gl.glReadPixels( dst.Left, dst.Top, dst.Width, dst.Height, format, type, dst.Data );

			// restore default alignment
			Gl.glPixelStorei( Gl.GL_PACK_ALIGNMENT, 4 );

			//vertical flip

			{
				int rowSpan = dst.Width * PixelUtil.GetNumElemBytes( dst.Format );
				int height = dst.Height;
				byte[] tmpData = new byte[ rowSpan * height ];
				unsafe
				{
					byte* dataPtr = (byte*)dst.Data.ToPointer();
					//int *srcRow = (uchar *)dst.data, *tmpRow = tmpData + (height - 1) * rowSpan;

					for ( int row = height - 1, tmpRow = 0; row >= 0; row--, tmpRow++ )
					{
						for ( int col = 0; col < rowSpan; col++ )
						{
							tmpData[ tmpRow * rowSpan + col ] = dataPtr[ row * rowSpan + col ];
						}
					}
				}
				IntPtr tmpDataHandle = Memory.PinObject( tmpData );
				Memory.Copy( tmpDataHandle, dst.Data, rowSpan * height );
				Memory.UnpinObject( tmpData );
			}
		}