public RenderTarget2D(GraphicsDevice graphicsDevice, int width, int height, bool mipMap, 
     SurfaceFormat preferredFormat, DepthFormat preferredDepthFormat, int preferredMultiSampleCount, RenderTargetUsage usage)
     : base(graphicsDevice, width, height, mipMap, preferredFormat)
 {
     RenderTargetUsage = usage;
     //allocateOpenGLTexture();
 }

        public BackBuffer(GraphicsDevice graphicsDevice, string name)
        {
            if (graphicsDevice == null)
            {
                throw new ArgumentNullException("graphicsDevice");
            }

            this.graphicsDevice = graphicsDevice;

            Name = name;

            var pp = graphicsDevice.PresentationParameters;
            width = pp.BackBufferWidth;
            height = pp.BackBufferHeight;
            mipMap = true;
            surfaceFormat = pp.BackBufferFormat;
            depthFormat = pp.DepthStencilFormat;
            multiSampleCount = pp.MultiSampleCount;
            renderTargetUsage = pp.RenderTargetUsage;

            renderTargetCount = 1;
            currentIndex = 0;

            activated = false;
            disposed = false;
        }

 public RenderTarget2D(GraphicsDevice graphicsDevice, int width, int height, bool mipMap, SurfaceFormat preferredFormat, DepthFormat preferredDepthFormat, int preferredMultiSampleCount, RenderTargetUsage usage)
   : base(graphicsDevice, width, height, mipMap, preferredFormat, true)
 {
   RenderTarget2D renderTarget2D = this;
   this.DepthStencilFormat = preferredDepthFormat;
   this.MultiSampleCount = preferredMultiSampleCount;
   this.RenderTargetUsage = usage;
   if (preferredDepthFormat == DepthFormat.None)
     return;
   Threading.BlockOnUIThread((Action) (() =>
   {
     GL.GenRenderbuffers(1, out renderTarget2D.glDepthStencilBuffer);
     GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, renderTarget2D.glDepthStencilBuffer);
     RenderbufferStorage local_0 = RenderbufferStorage.DepthComponent16;
     switch (preferredDepthFormat)
     {
       case DepthFormat.Depth24Stencil8:
         local_0 = RenderbufferStorage.Depth24Stencil8;
         break;
       case DepthFormat.Depth24:
         local_0 = RenderbufferStorage.DepthComponent24;
         break;
       case DepthFormat.Depth16:
         local_0 = RenderbufferStorage.DepthComponent16;
         break;
     }
     if (renderTarget2D.MultiSampleCount == 0)
       GL.RenderbufferStorage(RenderbufferTarget.Renderbuffer, local_0, renderTarget2D.width, renderTarget2D.height);
     else
       GL.RenderbufferStorageMultisample(RenderbufferTarget.Renderbuffer, renderTarget2D.MultiSampleCount, local_0, renderTarget2D.width, renderTarget2D.height);
   }));
 }

		public RenderTarget2D (GraphicsDevice graphicsDevice, int width, int height, bool mipMap, 
			SurfaceFormat preferredFormat, DepthFormat preferredDepthFormat, int preferredMultiSampleCount, RenderTargetUsage usage)
			:base (graphicsDevice, width, height, mipMap, preferredFormat)
		{


#if IPHONE
			if(GraphicsDevice.OpenGLESVersion == MonoTouch.OpenGLES.EAGLRenderingAPI.OpenGLES2)

			{
				GL20.GenFramebuffers(1, ref frameBuffer);
			}
			else
			{
				RenderTargetUsage = usage;
				DepthStencilFormat = preferredDepthFormat;
			}
#elif ANDROID
            if (GraphicsDevice.OpenGLESVersion == OpenTK.Graphics.GLContextVersion.Gles2_0)
            {
                GL20.GenFramebuffers(1, ref frameBuffer);
            }
            else
            {
                RenderTargetUsage = usage;
                DepthStencilFormat = preferredDepthFormat;
            }
#else
				RenderTargetUsage = usage;
				DepthStencilFormat = preferredDepthFormat;
#endif


        }

        /// <summary>
        /// Initializes a new instance of the OpenGLRenderTarget2D class.
        /// </summary>
        /// <param name="uv">The Ultraviolet context.</param>
        /// <param name="width">The render target's width in pixels.</param>
        /// <param name="height">The render target's height in pixels.</param>
        /// <param name="usage">A <see cref="RenderTargetUsage"/> value specifying whether the 
        /// render target's data is discarded or preserved when it is bound to the graphics device.</param>
        /// <param name="buffers">The collection of render buffers to attach to the target.</param>
        public OpenGLRenderTarget2D(UltravioletContext uv, Int32 width, Int32 height, RenderTargetUsage usage, IEnumerable<RenderBuffer2D> buffers = null)
            : base(uv)
        {
            Contract.EnsureRange(width > 0, nameof(width));
            Contract.EnsureRange(height > 0, nameof(height));

            // NOTE: If we're in an older version of GLES, we need to use glFramebufferTexture2D()
            glFramebufferTextureIsSupported = !gl.IsGLES || gl.IsVersionAtLeast(3, 2);

            glDrawBuffersIsSupported = !gl.IsGLES2 || gl.IsExtensionSupported("GL_ARB_draw_buffers");
            glDrawBufferIsSupported = !gl.IsGLES;

            var framebuffer = 0u;

            uv.QueueWorkItemAndWait(() =>
            {
                using (OpenGLState.ScopedCreateFramebuffer(out framebuffer))
                {
                    if (buffers != null)
                    {
                        foreach (OpenGLRenderBuffer2D buffer in buffers)
                        {
                            AttachRenderBuffer(buffer);
                        }
                    }
                }
            });

            this.width = width;
            this.height = height;
            this.framebuffer = framebuffer;
            this.renderTargetUsage = usage;
        }

        private void PlatformConstruct(GraphicsDevice graphicsDevice, int width, int height, bool mipMap,
            SurfaceFormat preferredFormat, DepthFormat preferredDepthFormat, int preferredMultiSampleCount, RenderTargetUsage usage)
        {
            // Setup the multisampling description.
            var multisampleDesc = new SharpDX.DXGI.SampleDescription(1, 0);
            if (preferredMultiSampleCount > 1)
            {
                multisampleDesc.Count = preferredMultiSampleCount;
                multisampleDesc.Quality = (int)StandardMultisampleQualityLevels.StandardMultisamplePattern;
            }

            // Create a descriptor for the depth/stencil buffer.
            // Allocate a 2-D surface as the depth/stencil buffer.
            // Create a DepthStencil view on this surface to use on bind.
            using (var depthBuffer = new SharpDX.Direct3D11.Texture2D(graphicsDevice._d3dDevice, new Texture2DDescription
            {
                Format = SharpDXHelper.ToFormat(preferredDepthFormat),
                ArraySize = 1,
                MipLevels = 1,
                Width = width,
                Height = height,
                SampleDescription = multisampleDesc,
                BindFlags = BindFlags.DepthStencil,
            }))
            {
                // Create the view for binding to the device.
                _depthStencilView = new DepthStencilView(graphicsDevice._d3dDevice, depthBuffer, new DepthStencilViewDescription()
                {
                    Format = SharpDXHelper.ToFormat(preferredDepthFormat),
                    Dimension = DepthStencilViewDimension.Texture2D
                });
            }
        }

 protected override void SetupGraphicsDeviceManager(GraphicsDeviceManager graphics, ref RenderTargetUsage presentation)
 {
     graphics.IsFullScreen = Globals.useFullScreen;
     graphics.PreferredBackBufferWidth = Globals.screenWidth;
     graphics.PreferredBackBufferHeight = Globals.screenHeight;
     base.SetupGraphicsDeviceManager(graphics, ref presentation);
 }

        public static ITexture2D New(VideoTypes videoType, IDisposableResource parent, Image image, int width, int height, bool generateMipmaps, MultiSampleTypes multiSampleType, SurfaceFormats surfaceFormat, RenderTargetUsage renderTargetUsage, BufferUsages usage, Loader.LoadedCallbackMethod loadedCallback)
        {
            ITexture2D api = null;

            #if WIN32
            if (videoType == VideoTypes.D3D9) api = new D3D9.Texture2D(parent, image, width, height, generateMipmaps, multiSampleType, surfaceFormat, renderTargetUsage, usage, loadedCallback);
            #endif

            #if WIN32 || WINRT || WP8
            if (videoType == VideoTypes.D3D11) api = new D3D11.Texture2D(parent, image, width, height, generateMipmaps, multiSampleType, surfaceFormat, renderTargetUsage, usage, loadedCallback);
            #endif

            #if WIN32 || OSX || LINUX || iOS || ANDROID || NaCl
            if (videoType == VideoTypes.OpenGL) api = new OpenGL.Texture2D(parent, image, width, height, generateMipmaps, multiSampleType, surfaceFormat, renderTargetUsage, usage, loadedCallback);
            #endif

            #if XNA
            if (videoType == VideoTypes.XNA) api = new XNA.Texture2D(parent, image, width, height, generateMipmaps, multiSampleType, surfaceFormat, renderTargetUsage, usage, loadedCallback);
            #endif

            #if VITA
            if (videoType == VideoTypes.Vita) api = new Vita.Texture2D(parent, image, width, height, generateMipmaps, multiSampleType, surfaceFormat, renderTargetUsage, usage, loadedCallback);
            #endif

            if (api == null) Debug.ThrowError("Texture2DAPI", "Unsuported InputType: " + videoType);
            return api;
        }

        public IntermediateRenderTarget GetIntermediateTexture(int width, int height, bool mipmap, SurfaceFormat SurfaceFormat, DepthFormat DepthFormat, int preferedMultisampleCount, RenderTargetUsage RenderTargetUsage)
        {
            // Look for a matching rendertarget in the cache
            for (int i = 0; i < intermediateTextures.Count; i++)
            {
                if (intermediateTextures[i].InUse == false
                    && height == intermediateTextures[i].RenderTarget.Height
                    && width == intermediateTextures[i].RenderTarget.Width
                    && preferedMultisampleCount == intermediateTextures[i].RenderTarget.MultiSampleCount
                    && SurfaceFormat == intermediateTextures[i].RenderTarget.Format
                    && DepthFormat == intermediateTextures[i].RenderTarget.DepthStencilFormat
                    && RenderTargetUsage == intermediateTextures[i].RenderTarget.RenderTargetUsage
                    && (mipmap == true && intermediateTextures[i].RenderTarget.LevelCount > 0 || mipmap == false && intermediateTextures[i].RenderTarget.LevelCount == 0)

                    )
                {
                    intermediateTextures[i].InUse = true;
                    return intermediateTextures[i];
                }
            }

            // We didn't find one, let's make one
            IntermediateRenderTarget newTexture = new IntermediateRenderTarget();
            newTexture.RenderTarget = new RenderTarget2D(device,width, height, mipmap, SurfaceFormat,DepthFormat, preferedMultisampleCount, RenderTargetUsage );
            intermediateTextures.Add(newTexture);
            newTexture.InUse = true;
            return newTexture;
        }

 public PostProcesses(SurfaceFormat? surface = null, DepthFormat? depth = null, bool mipmap = false, RenderTargetUsage? usage = null)
 {
     FormatSurface = surface;
     FormatDepth   = depth;
     MipMap        = mipmap;
     Usage         = usage;
 }

        public RenderTarget2D(GraphicsDevice graphicsDevice, int width, int height, bool mipMap, 
			SurfaceFormat preferredFormat, DepthFormat preferredDepthFormat, int preferredMultiSampleCount, RenderTargetUsage usage)
            : base(graphicsDevice, width, height, mipMap, preferredFormat)
        {
            RenderTargetUsage = usage;
            DepthStencilFormat = preferredDepthFormat;
        }

		protected override void SetupGraphicsDeviceManager(GraphicsDeviceManager graphics, ref RenderTargetUsage presentation)
		{
			if (graphics != null)
			{
				graphics.PreferredBackBufferWidth = 1280;
				graphics.PreferredBackBufferHeight = 720;
			}
		}

 public RenderTargetCube(GraphicsDevice graphicsDevice, int size, bool mipMap, SurfaceFormat preferredFormat, DepthFormat preferredDepthFormat, int preferredMultiSampleCount, RenderTargetUsage usage)
   : base(graphicsDevice, size, mipMap, preferredFormat, true)
 {
   this.DepthStencilFormat = preferredDepthFormat;
   this.MultiSampleCount = preferredMultiSampleCount;
   this.RenderTargetUsage = usage;
   throw new NotImplementedException();
 }

	    public RenderTarget2D(GraphicsDevice graphicsDevice, int width, int height, bool mipMap, SurfaceFormat preferredFormat, DepthFormat preferredDepthFormat, int preferredMultiSampleCount, RenderTargetUsage usage, bool shared, int arraySize)
	        : base(graphicsDevice, width, height, mipMap, preferredFormat, SurfaceType.RenderTarget, shared, arraySize)
	    {
            DepthStencilFormat = preferredDepthFormat;
            MultiSampleCount = preferredMultiSampleCount;
            RenderTargetUsage = usage;

            PlatformConstruct(graphicsDevice, width, height, mipMap, preferredFormat, preferredDepthFormat, preferredMultiSampleCount, usage, shared);
	    }

		public RenderTarget2D (GraphicsDevice graphicsDevice, int width, int height, bool mipMap,
         					   SurfaceFormat format, DepthFormat depthFormat, int multiSampleCount,
		                       RenderTargetUsage usage)
			:base(graphicsDevice, width, height,0, TextureUsage.None, format)
		{				
			
			allocateOpenGLTexture();
			
		}

 /// <summary>
 /// Initializes a new instance of the <see cref="RenderTargetProperties"/> struct.
 /// </summary>
 /// <param name="type">A value that specifies whether the render target should force hardware or software rendering. A value of <see cref="SharpDX.Direct2D1.RenderTargetType.Default"/> specifies that the render target should use hardware rendering if it is available; otherwise, it uses software rendering. Note that WIC bitmap render targets do not support hardware rendering.</param>
 /// <param name="pixelFormat">The pixel format and alpha mode of the render target. You can use the {{D2D1::PixelFormat}} function to create a pixel format that specifies that Direct2D should select the pixel format and alpha mode for you. For a list of pixel formats and alpha modes supported by each render target, see {{Supported Pixel Formats and Alpha Modes}}.</param>
 /// <param name="dpiX">The horizontal DPI of the render target.  To use the default DPI, set dpiX and dpiY to 0. For more information, see the Remarks section. 	</param>
 /// <param name="dpiY">The vertical DPI of the render target. To use the default DPI, set dpiX and dpiY to 0.  For more information, see the Remarks section. 	</param>
 /// <param name="usage">A value that specifies how the render target is remoted and whether it should be GDI-compatible.  Set to <see cref="SharpDX.Direct2D1.RenderTargetUsage.None"/> to create a render target that is not compatible with GDI and uses Direct3D command-stream remoting if it  is available.</param>
 /// <param name="minLevel">A value that specifies the minimum Direct3D feature level required for hardware rendering. If the specified minimum level is not available, the render target uses software rendering if the type  member is set to <see cref="SharpDX.Direct2D1.RenderTargetType.Default"/>; if  type  is set to to D2D1_RENDER_TARGET_TYPE_HARDWARE, render target creation fails. A value of <see cref="SharpDX.Direct2D1.FeatureLevel.Level_DEFAULT"/> indicates that Direct2D should determine whether the Direct3D feature level of the device is adequate. This field is used only when creating <see cref="WindowRenderTarget"/> and <see cref="DeviceContextRenderTarget"/> objects.	</param>  
 public RenderTargetProperties(RenderTargetType type, PixelFormat pixelFormat, float dpiX, float dpiY, RenderTargetUsage usage, FeatureLevel minLevel)
 {
     Type = type;
     PixelFormat = pixelFormat;
     DpiX = dpiX;
     DpiY = dpiY;
     Usage = usage;
     MinLevel = minLevel;
 }

 private void PlatformConstruct(GraphicsDevice graphicsDevice, int width, int height, bool mipMap,
     SurfaceFormat preferredFormat, DepthFormat preferredDepthFormat, int preferredMultiSampleCount, RenderTargetUsage usage, bool shared)
 {
     Threading.BlockOnUIThread(() =>
     {
         graphicsDevice.PlatformCreateRenderTarget(this, width, height, mipMap, preferredFormat, preferredDepthFormat, preferredMultiSampleCount, usage);
     });
     
     
 }

 public RenderTargetInfo(int width, int height, SurfaceFormat format, DepthFormat depthFormat, int multiSampleCount, bool mipMap, RenderTargetUsage usage)
 {
     Width = width;
     Height = height;
     SurfaceFormat = format;
     DepthFormat = depthFormat;
     MultiSampleCount = multiSampleCount;
     MipMap = mipMap;
     Usage = usage;
 }

 protected virtual bool InitWithWidthAndHeight(int w, int h, SurfaceFormat colorFormat, DepthFormat depthFormat, RenderTargetUsage usage)
 {
     m_Width = (int)Math.Ceiling(w * CCMacros.CCContentScaleFactor());
     m_Height = (int)Math.Ceiling(h * CCMacros.CCContentScaleFactor());
     m_ColorFormat = colorFormat;
     m_DepthFormat = depthFormat;
     m_Usage = usage;
     MakeTexture();
     return true;
 }

            public RenderTargetOperation(RenderTarget2D renderTarget, GraphicsDevice graphicsDevice, Color backgroundColor)
            {
                _graphicsDevice = graphicsDevice;
                _viewport = _graphicsDevice.Viewport;
                _previousRenderTargetUsage = _graphicsDevice.PresentationParameters.RenderTargetUsage;

                _graphicsDevice.PresentationParameters.RenderTargetUsage = RenderTargetUsage.PreserveContents;
                _graphicsDevice.SetRenderTarget(renderTarget);
                _graphicsDevice.Clear(backgroundColor);
            }