public void Close()
        {
            //1. clear all subForms
            if (_rootgfx != null)
            {
                _rootgfx.CloseWinRoot();
                _rootgfx = null;
            }

            if (_winBridge != null)
            {
                _winBridge.Close();
                _winBridge = null;
            }

#if DEBUG
            System.GC.Collect();
#endif
        }
 public void Bind(TopWindowBridgeWinForm winBridge)
 {
     //1.
     this.winBridge = winBridge;
     this.winBridge.BindWindowControl(this);
 }
        public void InitRootGraphics(
            RootGraphic rootgfx,
            ITopWindowEventRoot topWinEventRoot,
            InnerViewportKind innerViewportKind)
        {
            //create a proper bridge****

            _rootgfx           = rootgfx;
            _topWinEventRoot   = topWinEventRoot;
            _innerViewportKind = innerViewportKind;
            switch (innerViewportKind)
            {
#if GL_ENABLE
            case InnerViewportKind.GdiPlusOnGLES:
            case InnerViewportKind.AggOnGLES:
            case InnerViewportKind.GLES:
            {
                //temp not suppport

                var bridge = new OpenGL.MyTopWindowBridgeOpenGL(rootgfx, topWinEventRoot);
                var view   = new OpenGL.GpuOpenGLSurfaceView();
                view.Width  = rootgfx.Width;
                view.Height = rootgfx.Height;
                _gpuSurfaceViewUserControl = view;
                this.Controls.Add(view);
                //---------------------------------------
                view.Bind(bridge);
                _winBridge = bridge;
                //---------------------------------------
                IntPtr hh1 = view.Handle;         //force real window handle creation
                view.MakeCurrent();
                int max = Math.Max(view.Width, view.Height);

                _pcx = GLPainterContext.Create(max, max, view.Width, view.Height, true);

                _glPainter = new GLPainter();
                _glPainter.BindToPainterContext(_pcx);
                _glPainter.TextPrinter = new GLBitmapGlyphTextPrinter(_glPainter, PixelFarm.Drawing.GLES2.GLES2Platform.TextService);



                //canvasPainter.SmoothingMode = PixelFarm.Drawing.SmoothingMode.HighQuality;
                //----------------------
                //1. win gdi based
                //var printer = new WinGdiFontPrinter(canvas2d, view.Width, view.Height);
                //canvasPainter.TextPrinter = printer;
                //----------------------
                //2. raw vxs
                //var printer = new PixelFarm.Drawing.Fonts.VxsTextPrinter(canvasPainter);
                //canvasPainter.TextPrinter = printer;
                //----------------------
                //3. agg texture based font texture
                //var printer = new AggTextSpanPrinter(canvasPainter, 400, 50);
                //printer.HintTechnique = Typography.Rendering.HintTechnique.TrueTypeInstruction_VerticalOnly;
                //printer.UseSubPixelRendering = true;
                //canvasPainter.TextPrinter = printer;
                //3
                var myGLCanvas1 = new PixelFarm.Drawing.GLES2.MyGLDrawBoard(_glPainter);
                //{
                //in mixed mode
                //GDI+ on GLES, Agg on GLES we provide a software rendering layer too
                PixelFarm.Drawing.DrawBoard cpuDrawBoard = CreateSoftwareDrawBoard(view.Width, view.Height, innerViewportKind);
                myGLCanvas1.SetCpuBlitDrawBoardCreator(() => cpuDrawBoard);
                //}

                bridge.SetCanvas(myGLCanvas1);
            }
            break;
#endif

            case InnerViewportKind.PureAgg:
            {
                var bridge = new GdiPlus.MyTopWindowBridgeAgg(rootgfx, topWinEventRoot);         //bridge to agg
                var view   = new CpuSurfaceView();
                view.Dock = DockStyle.Fill;
                this.Controls.Add(view);
                //---------------------------------------
                view.Bind(bridge);
                _winBridge = bridge;
            }
            break;

            case InnerViewportKind.GdiPlus:
            default:
            {
                var bridge = new GdiPlus.MyTopWindowBridgeGdiPlus(rootgfx, topWinEventRoot);         //bridge with GDI+
                var view   = new CpuSurfaceView();
                view.Size = new System.Drawing.Size(rootgfx.Width, rootgfx.Height);
                this.Controls.Add(view);
                //---------------------------------------
                view.Bind(bridge);
                _winBridge = bridge;
            }
            break;

#if __SKIA__
            case InnerViewportKind.Skia:
            {
                //skiasharp ***

                var bridge = new Skia.MyTopWindowBridgeSkia(rootgfx, topWinEventRoot);
                var view   = new CpuSurfaceView();
                view.Dock = DockStyle.Fill;
                this.Controls.Add(view);
                //---------------------------------------
                view.Bind(bridge);
                _winBridge = bridge;
            }
            break;
#endif
            }
        }
        public void InitRootGraphics(
            RootGraphic rootgfx,
            ITopWindowEventRoot topWinEventRoot,
            InnerViewportKind innerViewportKind)
        {
            //create a proper bridge****

            this.rootgfx           = rootgfx;
            this.topWinEventRoot   = topWinEventRoot;
            this.innerViewportKind = innerViewportKind;
            switch (innerViewportKind)
            {
            case InnerViewportKind.GL:
            {
                //temp not suppport
                //TODO: review here
                //PixelFarm.Drawing.DrawingGL.CanvasGLPortal.Start();

                var bridge = new OpenGL.MyTopWindowBridgeOpenGL(rootgfx, topWinEventRoot);
                var view   = new OpenGL.GpuOpenGLSurfaceView();

                view.Width        = 800;
                view.Height       = 600;
                openGLSurfaceView = view;
                //view.Dock = DockStyle.Fill;
                this.Controls.Add(view);
                //---------------------------------------
                view.Bind(bridge);
                this.winBridge = bridge;
                //---------------------------------------
                view.SetGLPaintHandler(HandleGLPaint);
                hh1 = view.Handle;         //force real window handle creation
                view.MakeCurrent();
                //int max = Math.Max(this.Width, this.Height);
                int max = Math.Max(view.Width, view.Height);
                canvas2d = PixelFarm.Drawing.GLES2.GLES2Platform.CreateCanvasGL2d(max, max);
                //---------------
                //canvas2d.FlipY = true;//
                //---------------
                canvasPainter = new GLCanvasPainter(canvas2d, max, max);

                //canvasPainter.SmoothingMode = PixelFarm.Drawing.SmoothingMode.HighQuality;
                //----------------------
                //1. win gdi based
                //var printer = new WinGdiFontPrinter(canvas2d, view.Width, view.Height);
                //canvasPainter.TextPrinter = printer;
                //----------------------
                //2. raw vxs
                //var printer = new PixelFarm.Drawing.Fonts.VxsTextPrinter(canvasPainter);
                //canvasPainter.TextPrinter = printer;
                //----------------------
                //3. agg texture based font texture
                //var printer = new AggTextSpanPrinter(canvasPainter, 400, 50);
                //printer.HintTechnique = Typography.Rendering.HintTechnique.TrueTypeInstruction_VerticalOnly;
                //printer.UseSubPixelRendering = true;
                //canvasPainter.TextPrinter = printer;

                var printer = new GLBmpGlyphTextPrinter(canvasPainter, YourImplementation.BootStrapOpenGLES2.myFontLoader);
                canvasPainter.TextPrinter = printer;

                //
                //var myGLCanvas1 = new PixelFarm.Drawing.GLES2.MyGLCanvas(canvasPainter, 0, 0, view.Width, view.Height);
                var myGLCanvas1 = new PixelFarm.Drawing.GLES2.MyGLCanvas(canvasPainter, 0, 0, view.Width, view.Height);
                bridge.SetCanvas(myGLCanvas1);
            }
            break;

#if __SKIA__
            case InnerViewportKind.Skia:
            {
                //skiasharp ***

                var bridge = new Skia.MyTopWindowBridgeSkia(rootgfx, topWinEventRoot);
                var view   = new CpuSurfaceView();
                view.Dock = DockStyle.Fill;
                this.Controls.Add(view);
                //---------------------------------------
                view.Bind(bridge);
                this.winBridge = bridge;
            }
            break;
#endif
            case InnerViewportKind.GdiPlus:
            default:
            {
                var bridge = new GdiPlus.MyTopWindowBridgeGdiPlus(rootgfx, topWinEventRoot);
                var view   = new CpuSurfaceView();
                view.Dock = DockStyle.Fill;
                this.Controls.Add(view);
                //---------------------------------------
                view.Bind(bridge);
                this.winBridge = bridge;
            }
            break;
            }
        }