CSharpGL.FBORenderContext.Blit C# (CSharp) Method

        public override void Blit(IntPtr deviceContext)
        {
            if (this.DeviceContextHandle != IntPtr.Zero)
            {
                //  Set the read buffer.
                OpenGL.ReadBuffer(OpenGL.GL_COLOR_ATTACHMENT0);

                //	Read the pixels into the DIB section.
                OpenGL.ReadPixels(0, 0, this.Width, this.Height, OpenGL.GL_BGRA,
                    OpenGL.GL_UNSIGNED_BYTE, this.dibSection.Bits);

                //	Blit the DC (containing the DIB section) to the target DC.
                Win32.BitBlt(deviceContext, 0, 0, this.Width, this.Height,
                    this.dibSection.MemoryDeviceContext, 0, 0, Win32.SRCCOPY);
            }
        }

        /// <summary>
        ///
        /// </summary>
        /// <param name="e"></param>
        protected override void OnPaint(PaintEventArgs e)
        {
            FBORenderContext renderContext = this.renderContext;

            if (renderContext == null)
            {
                base.OnPaint(e);
                return;
            }

            stopWatch.Reset();
            stopWatch.Start();

            //	Make sure it's our instance of openSharpGL that's active.
            renderContext.MakeCurrent();

            if (this.designMode)
            {
                try
                {
                    DesignModeRendering();
                }
                catch (Exception)
                {
                }
            }
            else
            {
                //	If there is a draw handler, then call it.
                DoOpenGLDraw(e);
            }

            //	Blit our offscreen bitmap.
            Graphics graphics      = e.Graphics;
            IntPtr   deviceContext = graphics.GetHdc();

            renderContext.Blit(deviceContext);
            graphics.ReleaseHdc(deviceContext);

            stopWatch.Stop();

            {
                ErrorCode error = (ErrorCode)OpenGL.GetError();
                if (error != ErrorCode.NoError)
                {
                    Debug.WriteLine(string.Format("{0}: OpenGL error: {1}", this.fullname, error));
                }
            }

            this.FPS = 1000.0 / stopWatch.Elapsed.TotalMilliseconds;
        }