/*
-----------------------------------------------------------------------------
This source file is part of OGRE
(Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2014 Torus Knot Software Ltd

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
-----------------------------------------------------------------------------
*/
#ifndef __D3D11TEXTURE_H__
#define __D3D11TEXTURE_H__

#include "OgreD3D11Prerequisites.h"
#include "OgreTexture.h"
#include "OgreRenderTexture.h"

#if OGRE_PLATFORM == OGRE_PLATFORM_WIN32 && !defined(_WIN32_WINNT_WIN8)
    #ifndef USE_D3DX11_LIBRARY
        #define USE_D3DX11_LIBRARY
    #endif
#endif

namespace Ogre {
	class D3D11Texture : public Texture
	{
	protected:
        // needed to store data between prepareImpl and loadImpl
        typedef SharedPtr<vector<MemoryDataStreamPtr>::type > LoadedStreams;

		/// D3DDevice pointer
		D3D11Device	&	mDevice;	

		/// D3D11 pointer
		//LPDIRECT3D11				*mpD3D;
		// 1D texture pointer
		ID3D11Texture1D *mp1DTex;
		// 2D texture pointer
		ID3D11Texture2D *mp2DTex;
		/// cubic texture pointer
		ID3D11Texture3D	*mp3DTex;	
		/// actual texture pointer
		ID3D11Resource 	*mpTex;		

		ID3D11ShaderResourceView* mpShaderResourceView;

		bool mAutoMipMapGeneration;

		template<typename fromtype, typename totype>
		void _queryInterface(fromtype *from, totype **to)
		{
			HRESULT hr = from->QueryInterface(__uuidof(totype), (void **)to);

			if(FAILED(hr) || mDevice.isError())
			{
				this->freeInternalResources();
				String errorDescription = mDevice.getErrorDescription();
				OGRE_EXCEPT(Exception::ERR_RENDERINGAPI_ERROR, "Can't get base texture\nError Description:" + errorDescription, 
					"D3D11Texture::_queryInterface" );
			}
		}

#ifdef USE_D3DX11_LIBRARY		
		void _loadDDS(DataStreamPtr &dstream);
#endif
        void _create1DResourceView();
		void _create2DResourceView();
		void _create3DResourceView();

		// is dynamic
		bool mIsDynamic; 

		/// cube texture individual face names
		String							mCubeFaceNames[6];
		/// device creation parameters
		//D3DDEVICE_CREATION_PARAMETERS	mDevCreParams;
		/// back buffer pixel format
		DXGI_FORMAT						mBBPixelFormat;
		/// The memory pool being used
		//D3DPOOL							mD3DPool;
		/// device capabilities pointer
		//D3DCAPS9						mDevCaps;
		// Dynamic textures?
		bool                            mDynamicTextures;
		/// Vector of pointers to subsurfaces
		typedef vector<HardwarePixelBufferSharedPtr>::type SurfaceList;
		SurfaceList						mSurfaceList;

		D3D11_SHADER_RESOURCE_VIEW_DESC mSRVDesc;
		/// internal method, load a normal texture
		void _loadTex(LoadedStreams & loadedStreams);

		/// internal method, create a blank normal 1D Dtexture
		void _create1DTex();
		/// internal method, create a blank normal 2D texture
		void _create2DTex();
		/// internal method, create a blank cube texture
		void _create3DTex();

		/// internal method, return a D3D pixel format for texture creation
		DXGI_FORMAT _chooseD3DFormat();

		/// @copydoc Texture::createInternalResources
		void createInternalResources(void);
		/// @copydoc Texture::createInternalResourcesImpl
		void createInternalResourcesImpl(void);
		/// @copydoc Texture::freeInternalResources
		void freeInternalResources(void);
		/// free internal resources
		void freeInternalResourcesImpl(void);
		/// internal method, set Texture class source image protected attributes
		void _setSrcAttributes(unsigned long width, unsigned long height, unsigned long depth, PixelFormat format);
		/// internal method, set Texture class final texture protected attributes
		void _setFinalAttributes(unsigned long width, unsigned long height, unsigned long depth, PixelFormat format, UINT miscflags);

		/// internal method, the cube map face name for the spec. face index
		String _getCubeFaceName(unsigned char face) const
		{ assert(face < 6); return mCubeFaceNames[face]; }

		/// internal method, create D3D11HardwarePixelBuffers for every face and
		/// mipmap level. This method must be called after the D3D texture object was created
		void _createSurfaceList(void);


        /// @copydoc Resource::prepareImpl
        void prepareImpl(void);
        /// @copydoc Resource::unprepareImpl
        void unprepareImpl(void);
		/// overridden from Resource
		void loadImpl();
		/// overridden from Resource
		void postLoadImpl();

        /** Vector of pointers to streams that were pulled from disk by
            prepareImpl  but have yet to be pushed into texture memory
            by loadImpl.  Should be cleared on load and on unprepare.
        */
        LoadedStreams mLoadedStreams;
		LoadedStreams _prepareNormTex();
		LoadedStreams _prepareVolumeTex();
		LoadedStreams _prepareCubeTex();
	public:
		/// constructor 
		D3D11Texture(ResourceManager* creator, const String& name, ResourceHandle handle,
			const String& group, bool isManual, ManualResourceLoader* loader, 
			D3D11Device & device);
		/// destructor
		~D3D11Texture();

		/// overridden from Texture
		void copyToTexture( TexturePtr& target );
		/// overridden from Texture
		void loadImage( const Image &img );


		/// @copydoc Texture::getBuffer
		HardwarePixelBufferSharedPtr getBuffer(size_t face, size_t mipmap);

		ID3D11Resource *getTextureResource() 
		{ assert(mpTex); return mpTex; }
		/// retrieves a pointer to the actual texture
		ID3D11ShaderResourceView *getTexture() 
		{ assert(mpShaderResourceView); return mpShaderResourceView; }
		/*/// retrieves a pointer to the normal 1D/2D texture
		IDirect3DTexture9 *getNormTexture()
		{ assert(mpNormTex); return mpNormTex; }
		/// retrieves a pointer to the cube texture
		IDirect3DCubeTexture9 *getCubeTexture()
		{ assert(mpCubeTex); return mpCubeTex; }
		*/


		/// For dealing with lost devices - release the resource if in the default pool (and return true)
		bool releaseIfDefaultPool(void);
		/// For dealing with lost devices - recreate the resource if in the default pool (and return true)
		bool recreateIfDefaultPool(D3D11Device & device);

		ID3D11Texture1D * GetTex1D() {return mp1DTex;};
		ID3D11Texture2D * GetTex2D() {return mp2DTex;};
		ID3D11Texture3D	* GetTex3D() {return mp3DTex;};

		D3D11_SHADER_RESOURCE_VIEW_DESC getShaderResourceViewDesc() const;

		bool HasAutoMipMapGenerationEnabled() const { return mAutoMipMapGeneration; }

	};

	/// RenderTexture implementation for D3D11
	class D3D11RenderTexture : public RenderTexture
	{
		D3D11Device & mDevice;
		ID3D11RenderTargetView * mRenderTargetView;
		ID3D11DepthStencilView * mDepthStencilView;
	public:
		D3D11RenderTexture(const String &name, D3D11HardwarePixelBuffer *buffer, D3D11Device & device );
		virtual ~D3D11RenderTexture();

		void rebind(D3D11HardwarePixelBuffer *buffer);

		virtual void getCustomAttribute( const String& name, void *pData );

		bool requiresTextureFlipping() const { return false; }
	};

}

#endif
