#pragma once
#include "Resource.h"


struct LockedTextureData
{
	void* Data;
	uint32 RowPitch;
};


struct TextureInitialData
{
	TextureInitialData()
		: Data(NULL)
		, Pitch(0)
		, Owner(true)
	{}

	TextureInitialData(void* Data, uint32 Pitch)
		: Data(Data)
		, Pitch(Pitch)
		, Owner(true)
	{}

	~TextureInitialData()
	{
		if (Owner && Data != NULL)
			delete [] Data;
	}

	void* Data;
	uint32 Pitch;
	bool Owner;
};


struct CreateTextureDescriptor
{
	uint32 Width;
	uint32 Height;
	uint32 Elements;
	uint32 MipLevels;
	DataFormat::Enumeration Format;
	DataAccessType::Enumeration AccessType;
	TextureInitialData* InitialData_;

	static CreateTextureDescriptor AsSingleTexture(uint32 Width, uint32 Height, uint32 MipLevels = 1, DataFormat::Enumeration Format = DataFormat::R8G8B8A8_SignedNormalized, TextureInitialData* InitialData_ = NULL, DataAccessType::Enumeration AccessType = DataAccessType::Dynamic)
	{
		CreateTextureDescriptor Desc;

		Desc.Width = Width;
		Desc.Height = Height;
		Desc.Elements = 0;
		Desc.Format = Format;
		Desc.AccessType = AccessType;
		Desc.InitialData_ = InitialData_;
		Desc.MipLevels = MipLevels;

		return Desc;
	}

	static CreateTextureDescriptor AsArrayTexture(uint32 Width, uint32 Height, uint32 MipLevels = 1, uint32 Elements = 1, DataFormat::Enumeration Format = DataFormat::R8G8B8A8_SignedNormalized, TextureInitialData* InitialData_ = NULL)
	{
		CreateTextureDescriptor Desc;

		Desc.Width = Width;
		Desc.Height = Height;
		Desc.Elements = Elements;
		Desc.Format = Format;
		Desc.AccessType = DataAccessType::Static;
		Desc.InitialData_ = InitialData_;
		Desc.MipLevels = MipLevels;

		return Desc;
	}
};


struct IFile;
struct __declspec(novtable) ITexture
{
	virtual string8 get_BindingName() const = 0;
	virtual void set_BindingName(const string8& argName) = 0;

	virtual string16 get_FileName() const = 0;

	virtual uint32 get_TextureWidth() const = 0;
	virtual uint32 get_TextureHeight() const = 0;
	virtual uint32 get_TextureArraySize() const = 0;
	virtual DataFormat::Enumeration get_TextureFormat() const = 0;

	virtual void LoadFromFile(const string16& argFileName, DataAccessType::Enumeration argAccessType = DataAccessType::Static) = 0;
	virtual void CreateTexture(const CreateTextureDescriptor& argDesc) = 0;
	virtual LockedTextureData LockTextureBuffer(DataAccessMode::Enumeration argAccessMode, uint32 argArrayElement = 0) = 0;
	virtual void UnlockTextureBuffer() = 0;

	virtual void CreateRenderTargetTexture(uint32 argWidth, uint32 argHeight, DataFormat::Enumeration argFormat, uint32 argMultiSampleCount, uint32 argMultiSampleQuality) = 0;

	virtual ID3D10ShaderResourceView* get_ResourceViewFromTexture() const = 0;
	virtual ID3D10Texture2D* get_Texture2D() const = 0;
};