BansheeEngine/CamelotD3D11RenderSystem/Source/CmD3D11Mappings.cpp

#include "CmD3D11Mappings.h"
#include "CmDebug.h"
#include "CmException.h"

namespace CamelotEngine
{
	D3D11_TEXTURE_ADDRESS_MODE D3D11Mappings::get(SamplerState::TextureAddressingMode tam)
	{
		switch( tam )
		{
		case SamplerState::TAM_WRAP:
			return D3D11_TEXTURE_ADDRESS_WRAP;
		case SamplerState::TAM_MIRROR:
			return D3D11_TEXTURE_ADDRESS_MIRROR;
		case SamplerState::TAM_CLAMP:
			return D3D11_TEXTURE_ADDRESS_CLAMP;
		case SamplerState::TAM_BORDER:
			return D3D11_TEXTURE_ADDRESS_BORDER;
		}
		return D3D11_TEXTURE_ADDRESS_MIRROR_ONCE;
	}

	D3D11_BLEND D3D11Mappings::get(SceneBlendFactor sbf)
	{
		switch( sbf )
		{
		case SBF_ONE:
			return D3D11_BLEND_ONE;
		case SBF_ZERO:
			return D3D11_BLEND_ZERO;
		case SBF_DEST_COLOUR:
			return D3D11_BLEND_DEST_COLOR;
		case SBF_SOURCE_COLOUR:
			return D3D11_BLEND_SRC_COLOR;
		case SBF_ONE_MINUS_DEST_COLOUR:
			return D3D11_BLEND_INV_DEST_COLOR;
		case SBF_ONE_MINUS_SOURCE_COLOUR:
			return D3D11_BLEND_INV_SRC_COLOR;
		case SBF_DEST_ALPHA:
			return D3D11_BLEND_DEST_ALPHA;
		case SBF_SOURCE_ALPHA:
			return D3D11_BLEND_SRC_ALPHA;
		case SBF_ONE_MINUS_DEST_ALPHA:
			return D3D11_BLEND_INV_DEST_ALPHA;
		case SBF_ONE_MINUS_SOURCE_ALPHA:
			return D3D11_BLEND_INV_SRC_ALPHA;
		}
		return D3D11_BLEND_ZERO;
	}

	D3D11_BLEND_OP D3D11Mappings::get(SceneBlendOperation sbo)
	{
		switch( sbo )
		{
		case SBO_ADD:
			return D3D11_BLEND_OP_ADD;
		case SBO_SUBTRACT:
			return D3D11_BLEND_OP_SUBTRACT;
		case SBO_REVERSE_SUBTRACT:
			return D3D11_BLEND_OP_REV_SUBTRACT;
		case SBO_MIN:
			return D3D11_BLEND_OP_MIN;
		case SBO_MAX:
			return D3D11_BLEND_OP_MAX;
		}
		return D3D11_BLEND_OP_ADD;
	}

	D3D11_COMPARISON_FUNC D3D11Mappings::get(CompareFunction cf)
	{
		switch( cf )
		{
		case CMPF_ALWAYS_FAIL:
			return D3D11_COMPARISON_NEVER;
		case CMPF_ALWAYS_PASS:
			return D3D11_COMPARISON_ALWAYS;
		case CMPF_LESS:
			return D3D11_COMPARISON_LESS;
		case CMPF_LESS_EQUAL:
			return D3D11_COMPARISON_LESS_EQUAL;
		case CMPF_EQUAL:
			return D3D11_COMPARISON_EQUAL;
		case CMPF_NOT_EQUAL:
			return D3D11_COMPARISON_NOT_EQUAL;
		case CMPF_GREATER_EQUAL:
			return D3D11_COMPARISON_GREATER_EQUAL;
		case CMPF_GREATER:
			return D3D11_COMPARISON_GREATER;
		};
		return D3D11_COMPARISON_ALWAYS;
	}

	D3D11_CULL_MODE D3D11Mappings::get(CullingMode cm, bool flip)
	{
		switch( cm )
		{
		case CULL_NONE:
			return D3D11_CULL_NONE;
		case CULL_CLOCKWISE:
			if( flip )
				return D3D11_CULL_FRONT;
			else
				return D3D11_CULL_BACK;
		case CULL_ANTICLOCKWISE:
			if( flip )
				return D3D11_CULL_BACK;
			else
				return D3D11_CULL_FRONT;
		}
		return D3D11_CULL_NONE;
	}

	D3D11_FILL_MODE D3D11Mappings::get(PolygonMode level)
	{
		switch(level)
		{
		case PM_POINTS:
			LOGWRN("Point rendering not supported in DX11. You must utilize custom geometry shader for that feature");
			return D3D11_FILL_SOLID; 
		case PM_WIREFRAME:
			return D3D11_FILL_WIREFRAME;
		case PM_SOLID:
			return D3D11_FILL_SOLID;
		}
		return D3D11_FILL_SOLID;
	}

	D3D11_STENCIL_OP D3D11Mappings::get(StencilOperation op, bool invert)
	{
		switch(op)
		{
		case SOP_KEEP:
			return D3D11_STENCIL_OP_KEEP;
		case SOP_ZERO:
			return D3D11_STENCIL_OP_ZERO;
		case SOP_REPLACE:
			return D3D11_STENCIL_OP_REPLACE;
		case SOP_INCREMENT:
			return invert? D3D11_STENCIL_OP_DECR_SAT : D3D11_STENCIL_OP_INCR_SAT;
		case SOP_DECREMENT:
			return invert? D3D11_STENCIL_OP_INCR_SAT : D3D11_STENCIL_OP_DECR_SAT;
		case SOP_INCREMENT_WRAP:
			return invert? D3D11_STENCIL_OP_DECR : D3D11_STENCIL_OP_INCR;
		case SOP_DECREMENT_WRAP:
			return invert? D3D11_STENCIL_OP_INCR : D3D11_STENCIL_OP_DECR;
		case SOP_INVERT:
			return D3D11_STENCIL_OP_INVERT;
		}
		return D3D11_STENCIL_OP_KEEP;
	}

	DWORD D3D11Mappings::get(FilterType ft)
	{
		switch (ft)
		{
		case FT_MIN:
			return D3D11_MIN_FILTER_SHIFT;
			break;
		case FT_MAG:
			return D3D11_MAG_FILTER_SHIFT;
			break;
		case FT_MIP:
			return D3D11_MIP_FILTER_SHIFT;
			break;
		}

		// to keep compiler happy
		return D3D11_MIP_FILTER_SHIFT;
	}
	//---------------------------------------------------------------------
	D3D11_FILTER D3D11Mappings::get(const FilterOptions min, const FilterOptions mag, const FilterOptions mip, const bool comparison)
	{

		D3D11_FILTER res;
#define MERGE_FOR_SWITCH(_comparison_, _min_ , _mag_, _mip_ ) ((_comparison_ << 16) | (_min_ << 8) | (_mag_ << 4) | (_mip_))

		switch((MERGE_FOR_SWITCH(comparison, min, mag, mip)))
		{
		case MERGE_FOR_SWITCH(true, FO_POINT, FO_POINT, FO_POINT):
			res = D3D11_FILTER_COMPARISON_MIN_MAG_MIP_POINT;
			break;
		case MERGE_FOR_SWITCH(true, FO_POINT, FO_POINT, FO_LINEAR):
			res = D3D11_FILTER_COMPARISON_MIN_MAG_POINT_MIP_LINEAR;
			break;
		case MERGE_FOR_SWITCH(true, FO_POINT, FO_LINEAR, FO_POINT):
			res = D3D11_FILTER_COMPARISON_MIN_POINT_MAG_LINEAR_MIP_POINT;
			break;
		case MERGE_FOR_SWITCH(true, FO_POINT, FO_LINEAR, FO_LINEAR):
			res = D3D11_FILTER_COMPARISON_MIN_POINT_MAG_MIP_LINEAR;
			break;
		case MERGE_FOR_SWITCH(true, FO_LINEAR, FO_POINT, FO_POINT):
			res = D3D11_FILTER_COMPARISON_MIN_LINEAR_MAG_MIP_POINT;
			break;
		case MERGE_FOR_SWITCH(true, FO_LINEAR, FO_POINT, FO_LINEAR):
			res = D3D11_FILTER_COMPARISON_MIN_LINEAR_MAG_POINT_MIP_LINEAR;
			break;		
		case MERGE_FOR_SWITCH(true, FO_LINEAR, FO_LINEAR, FO_POINT):
			res = D3D11_FILTER_COMPARISON_MIN_MAG_LINEAR_MIP_POINT;
			break;
		case MERGE_FOR_SWITCH(true, FO_LINEAR, FO_LINEAR, FO_LINEAR):
			res = D3D11_FILTER_COMPARISON_MIN_MAG_MIP_LINEAR;
			break;
		case MERGE_FOR_SWITCH(true, FO_ANISOTROPIC, FO_ANISOTROPIC, FO_ANISOTROPIC):
			res = D3D11_FILTER_COMPARISON_ANISOTROPIC;
			break;

		case MERGE_FOR_SWITCH(false, FO_POINT, FO_POINT, FO_POINT):
			res = D3D11_FILTER_MIN_MAG_MIP_POINT;
			break;
		case MERGE_FOR_SWITCH(false, FO_POINT, FO_POINT, FO_LINEAR):
			res = D3D11_FILTER_MIN_MAG_POINT_MIP_LINEAR;
			break;
		case MERGE_FOR_SWITCH(false, FO_POINT, FO_LINEAR, FO_POINT):
			res = D3D11_FILTER_MIN_POINT_MAG_LINEAR_MIP_POINT;
			break;
		case MERGE_FOR_SWITCH(false, FO_POINT, FO_LINEAR, FO_LINEAR):
			res = D3D11_FILTER_MIN_POINT_MAG_MIP_LINEAR;
			break;
		case MERGE_FOR_SWITCH(false, FO_LINEAR, FO_POINT, FO_POINT):
			res = D3D11_FILTER_MIN_LINEAR_MAG_MIP_POINT;
			break;
		case MERGE_FOR_SWITCH(false, FO_LINEAR, FO_POINT, FO_LINEAR):
			res = D3D11_FILTER_MIN_LINEAR_MAG_POINT_MIP_LINEAR;
			break;		
		case MERGE_FOR_SWITCH(false, FO_LINEAR, FO_LINEAR, FO_POINT):
			res = D3D11_FILTER_MIN_MAG_LINEAR_MIP_POINT;
			break;
		case MERGE_FOR_SWITCH(false, FO_LINEAR, FO_LINEAR, FO_LINEAR):
			res = D3D11_FILTER_MIN_MAG_MIP_LINEAR;
			break;
		case MERGE_FOR_SWITCH(false, FO_ANISOTROPIC, FO_ANISOTROPIC, FO_ANISOTROPIC):
			res = D3D11_FILTER_ANISOTROPIC;
			break;
		default:
			res = D3D11_FILTER_MIN_MAG_MIP_LINEAR;
		}	

#undef MERGE_FOR_SWITCH
		
		return res;
	}

	DWORD D3D11Mappings::get(HardwareBuffer::Usage usage)
	{
		DWORD ret = 0;
		if (usage & HardwareBuffer::HBU_DYNAMIC)
		{
#if CM_D3D_MANAGE_BUFFERS
			// Only add the dynamic flag for default pool, and
			// we use default pool when buffer is discardable
			if (usage & HardwareBuffer::HBU_DISCARDABLE)
				ret |= D3D11_USAGE_DYNAMIC;
#else
			ret |= D3D11_USAGE_DYNAMIC;
#endif
		}
		if (usage & HardwareBuffer::HBU_WRITE_ONLY)
		{
			ret |= D3D11_USAGE_DYNAMIC;
		}
		return ret;
	}

	D3D11_MAP D3D11Mappings::get(HardwareBuffer::LockOptions options, HardwareBuffer::Usage usage)
	{
		D3D11_MAP ret = D3D11_MAP_READ_WRITE;
		if (options == HardwareBuffer::HBL_DISCARD)
		{
#if CM_D3D_MANAGE_BUFFERS
			// Only add the discard flag for dynamic usgae and default pool
			if ((usage & HardwareBuffer::HBU_DYNAMIC) &&
				(usage & HardwareBuffer::HBU_DISCARDABLE))
				ret = D3D11_MAP_WRITE_DISCARD;
#else
			// D3D doesn't like discard or no_overwrite on non-dynamic buffers
			if (usage & HardwareBuffer::HBU_DYNAMIC)
				ret = D3D11_MAP_WRITE_DISCARD;
#endif
		}
		if (options == HardwareBuffer::HBL_READ_ONLY)
		{
			// D3D debug runtime doesn't like you locking managed buffers readonly
			// when they were created with write-only (even though you CAN read
			// from the software backed version)
			if (!(usage & HardwareBuffer::HBU_WRITE_ONLY))
				ret = D3D11_MAP_READ;

		}
		if (options == HardwareBuffer::HBL_NO_OVERWRITE)
		{
#if CM_D3D_MANAGE_BUFFERS
			// Only add the nooverwrite flag for dynamic usgae and default pool
			if ((usage & HardwareBuffer::HBU_DYNAMIC) &&
				(usage & HardwareBuffer::HBU_DISCARDABLE))
				ret = D3D11_MAP_WRITE_NO_OVERWRITE;
#else
			// D3D doesn't like discard or no_overwrite on non-dynamic buffers
			if (usage & HardwareBuffer::HBU_DYNAMIC)
				ret = D3D11_MAP_WRITE_NO_OVERWRITE;
#endif 
		}

		return ret;
	}

	UINT D3D11Mappings::getByteWidth(HardwareIndexBuffer::IndexType itype)
	{
		if (itype == HardwareIndexBuffer::IT_32BIT)
		{
			return sizeof(UINT32);
		}
		else
		{
			return sizeof(UINT16);
		}
	}

	DXGI_FORMAT D3D11Mappings::get(VertexElementType vType)
	{
		switch (vType)
		{
		case VET_COLOUR:
		case VET_COLOUR_ABGR:
		case VET_COLOUR_ARGB:
			return DXGI_FORMAT_R8G8B8A8_UNORM;
			break;
		case VET_FLOAT1:
			return DXGI_FORMAT_R32_FLOAT;
			break;
		case VET_FLOAT2:
			return DXGI_FORMAT_R32G32_FLOAT;
			break;
		case VET_FLOAT3:
			return DXGI_FORMAT_R32G32B32_FLOAT;
			break;
		case VET_FLOAT4:
			return DXGI_FORMAT_R32G32B32A32_FLOAT;
			break;
		case VET_SHORT2:
			return DXGI_FORMAT_R16G16_SINT;
			break;
		case VET_SHORT4:
			return DXGI_FORMAT_R16G16B16A16_SINT;
			break;
		case VET_UBYTE4:
			return DXGI_FORMAT_R8G8B8A8_UINT;
			break;
		}
		// to keep compiler happy
		return DXGI_FORMAT_R32G32B32_FLOAT;
	}

	VertexElementSemantic D3D11Mappings::get(LPCSTR sem)
	{
		// todo - add to ogre - POSITIONT and PSIZE ("Transformed vertex position" and "Point size")

		if( strcmp(sem, "BLENDINDICES") == 0 )
			return VES_BLEND_INDICES;
		if( strcmp(sem, "BLENDWEIGHT") == 0 )
			return VES_BLEND_WEIGHTS;
		if( strcmp(sem, "COLOR") == 0 )
			return VES_DIFFUSE;
		if( strcmp(sem, "NORMAL") == 0 )
			return VES_NORMAL;
		if( strcmp(sem, "POSITION") == 0 )
			return VES_POSITION;
		if( strcmp(sem, "TEXCOORD") == 0 )
			return VES_TEXTURE_COORDINATES;
		if( strcmp(sem, "BINORMAL") == 0 )
			return VES_BITANGENT;
		if( strcmp(sem, "TANGENT") == 0 )
			return VES_TANGENT;
		if( strcmp(sem, "POSITIONT") == 0 )
			return VES_POSITIONT;
		if( strcmp(sem, "PSIZE") == 0 ) 
			return VES_PSIZE;

		CM_EXCEPT(RenderingAPIException, "Invalid shader semantic: " + String(sem));

		// to keep compiler happy
		return VES_POSITION;
	}

	LPCSTR D3D11Mappings::get(VertexElementSemantic sem)
	{
		switch (sem)	
		{
		case VES_BLEND_INDICES:
			return "BLENDINDICES";
			break;
		case VES_BLEND_WEIGHTS:
			return "BLENDWEIGHT";
			break;
		case VES_DIFFUSE:
			return "COLOR"; // NB index will differentiate
			break;
		case VES_SPECULAR:
			return "COLOR"; // NB index will differentiate
			break;
		case VES_NORMAL:
			return "NORMAL";
			break;
		case VES_POSITION:
			return "POSITION";
			break;
		case VES_TEXTURE_COORDINATES:
			return "TEXCOORD";
			break;
		case VES_BITANGENT:
			return "BINORMAL";
			break;
		case VES_TANGENT:
			return "TANGENT";
			break;
		case VES_POSITIONT:
			return "POSITIONT";
			break;
		case VES_PSIZE:
			return "PSIZE";
			break;
		}
		// to keep compiler happy
		return "";
	}

	void D3D11Mappings::get(const Color& inColour, float * outColour )
	{
		outColour[0] = inColour.r;
		outColour[1] = inColour.g;
		outColour[2] = inColour.b;
		outColour[3] = inColour.a;	
	}

	PixelFormat D3D11Mappings::_getPF(DXGI_FORMAT d3dPF)
	{
		switch(d3dPF)
		{

		case DXGI_FORMAT_UNKNOWN	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R32G32B32A32_TYPELESS	:
			return PF_FLOAT32_RGBA;
		case DXGI_FORMAT_R32G32B32A32_FLOAT	:
			return PF_FLOAT32_RGBA;
		case DXGI_FORMAT_R32G32B32A32_UINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R32G32B32A32_SINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R32G32B32_TYPELESS	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R32G32B32_FLOAT	:
			return PF_FLOAT32_RGB;
		case DXGI_FORMAT_R32G32B32_UINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R32G32B32_SINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R16G16B16A16_TYPELESS	:
			return PF_FLOAT16_RGBA;
		case DXGI_FORMAT_R16G16B16A16_FLOAT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R16G16B16A16_UNORM	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R16G16B16A16_UINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R16G16B16A16_SNORM	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R16G16B16A16_SINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R32G32_TYPELESS	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R32G32_FLOAT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R32G32_UINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R32G32_SINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R32G8X24_TYPELESS	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_D32_FLOAT_S8X24_UINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R32_FLOAT_X8X24_TYPELESS	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_X32_TYPELESS_G8X24_UINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R10G10B10A2_TYPELESS	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R10G10B10A2_UNORM	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R10G10B10A2_UINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R11G11B10_FLOAT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R8G8B8A8_TYPELESS	:
			return PF_R8G8B8A8;
		case DXGI_FORMAT_R8G8B8A8_UNORM	:
			return PF_R8G8B8A8;
		case DXGI_FORMAT_R8G8B8A8_UNORM_SRGB	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R8G8B8A8_UINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R8G8B8A8_SNORM	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R8G8B8A8_SINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R16G16_TYPELESS	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R16G16_FLOAT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R16G16_UNORM	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R16G16_UINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R16G16_SNORM	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R16G16_SINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R32_TYPELESS	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_D32_FLOAT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R32_FLOAT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R32_UINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R32_SINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R24G8_TYPELESS	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_D24_UNORM_S8_UINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R24_UNORM_X8_TYPELESS	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_X24_TYPELESS_G8_UINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R8G8_TYPELESS	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R8G8_UNORM	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R8G8_UINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R8G8_SNORM	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R8G8_SINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R16_TYPELESS	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R16_FLOAT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_D16_UNORM	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R16_UNORM	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R16_UINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R16_SNORM	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R16_SINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R8_TYPELESS	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R8_UNORM	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R8_UINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R8_SNORM	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R8_SINT	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_A8_UNORM	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R1_UNORM	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R9G9B9E5_SHAREDEXP	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_R8G8_B8G8_UNORM	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_G8R8_G8B8_UNORM	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_BC1_TYPELESS	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_BC1_UNORM	:
			return PF_DXT1;
		case DXGI_FORMAT_BC1_UNORM_SRGB	:
			return PF_DXT1;
		case DXGI_FORMAT_BC2_TYPELESS	:
			return PF_DXT2;
		case DXGI_FORMAT_BC2_UNORM	:
			return PF_DXT2;
		case DXGI_FORMAT_BC2_UNORM_SRGB	:
			return PF_DXT2;
		case DXGI_FORMAT_BC3_TYPELESS	:
			return PF_DXT3;
		case DXGI_FORMAT_BC3_UNORM	:
			return PF_DXT3;
		case DXGI_FORMAT_BC3_UNORM_SRGB	:
			return PF_DXT3;
		case DXGI_FORMAT_BC4_TYPELESS	:
			return PF_DXT4;
		case DXGI_FORMAT_BC4_UNORM	:
			return PF_DXT4;
		case DXGI_FORMAT_BC4_SNORM	:
			return PF_DXT4;
		case DXGI_FORMAT_BC5_TYPELESS	:
			return PF_DXT5;
		case DXGI_FORMAT_BC5_UNORM	:
			return PF_DXT5;
		case DXGI_FORMAT_BC5_SNORM	:
			return PF_DXT5;
		case DXGI_FORMAT_B5G6R5_UNORM	:
			return PF_DXT5;
		case DXGI_FORMAT_B5G5R5A1_UNORM	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_B8G8R8A8_UNORM	:
			return PF_UNKNOWN;
		case DXGI_FORMAT_B8G8R8X8_UNORM	:
			return PF_UNKNOWN;
		default:
			return PF_UNKNOWN;
		}
	}

	DXGI_FORMAT D3D11Mappings::_getPF(PixelFormat ogrePF)
	{
		switch(ogrePF)
		{
		case PF_L8:
			return DXGI_FORMAT_R8_UNORM;
		case PF_L16:
			return DXGI_FORMAT_R16_UNORM;
		case PF_A8:
			return DXGI_FORMAT_UNKNOWN;
		case PF_A4L4:
			return DXGI_FORMAT_UNKNOWN;
		case PF_BYTE_LA:
			return DXGI_FORMAT_UNKNOWN; 
		case PF_R3G3B2:
			return DXGI_FORMAT_UNKNOWN;
		case PF_A1R5G5B5:
			return DXGI_FORMAT_UNKNOWN;
		case PF_R5G6B5:
			return DXGI_FORMAT_UNKNOWN;
		case PF_A4R4G4B4:
			return DXGI_FORMAT_UNKNOWN;
		case PF_R8G8B8:
			return DXGI_FORMAT_UNKNOWN;
		case PF_A8R8G8B8:
			return DXGI_FORMAT_UNKNOWN;
		case PF_A8B8G8R8:
			return DXGI_FORMAT_R8G8B8A8_UNORM;
		case PF_X8R8G8B8:
			return DXGI_FORMAT_UNKNOWN;
		case PF_X8B8G8R8:
			return DXGI_FORMAT_UNKNOWN;
		case PF_A2B10G10R10:
			return DXGI_FORMAT_R10G10B10A2_TYPELESS;
		case PF_A2R10G10B10:
			return DXGI_FORMAT_UNKNOWN;
		case PF_FLOAT16_R:
			return DXGI_FORMAT_R16_FLOAT;
		case PF_FLOAT16_RGBA:
			return DXGI_FORMAT_R16G16B16A16_FLOAT;
		case PF_FLOAT32_R:
			return DXGI_FORMAT_R32_FLOAT;
		case PF_FLOAT32_RGBA:
			return DXGI_FORMAT_R32G32B32A32_FLOAT;
		case PF_SHORT_RGBA:
			return DXGI_FORMAT_R16G16B16A16_UNORM;
		case PF_DXT1:
			return DXGI_FORMAT_BC1_UNORM;
		case PF_DXT2:
			return DXGI_FORMAT_BC2_UNORM;
		case PF_DXT3:
			return DXGI_FORMAT_BC3_UNORM;
		case PF_DXT4:
			return DXGI_FORMAT_BC4_UNORM;
		case PF_DXT5:
			return DXGI_FORMAT_BC5_UNORM;
		case PF_UNKNOWN:
		default:
			return DXGI_FORMAT_UNKNOWN;
		}
	}

	PixelFormat D3D11Mappings::_getClosestSupportedPF(PixelFormat ogrePF)
	{
		if (_getPF(ogrePF) != DXGI_FORMAT_UNKNOWN)
		{
			return ogrePF;
		}
		switch(ogrePF)
		{
		case PF_FLOAT16_RGB:
			return PF_FLOAT16_RGBA;
		case PF_FLOAT32_RGB:
			return PF_FLOAT32_RGBA;
		case PF_UNKNOWN:
		default:
			return PF_A8B8G8R8;
		}
	}

	D3D11_USAGE D3D11Mappings::_getUsage(HardwareBuffer::Usage mUsage)
	{
		if (_isDynamic(mUsage))
		{
			return D3D11_USAGE_DYNAMIC;
		}
		else
		{
			return D3D11_USAGE_DEFAULT;
		}
	}

	bool D3D11Mappings::_isDynamic(HardwareBuffer::Usage mUsage)
	{
		switch ( mUsage)
		{
		case HardwareBuffer::HBU_DYNAMIC:
		case HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY:
		case HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY_DISCARDABLE:
			return true;
		}

		return false;
	}

	bool D3D11Mappings::_isDynamic(int mUsage)
	{
		return _isDynamic(static_cast<HardwareBuffer::Usage>(mUsage));
	}

	D3D11_USAGE D3D11Mappings::_getUsage(int mUsage)
	{
		return _getUsage(static_cast<HardwareBuffer::Usage>(mUsage));
	}

	UINT D3D11Mappings::_getAccessFlags(int mUsage)
	{
		return _getAccessFlags(static_cast<HardwareBuffer::Usage>(mUsage));
	}

	UINT D3D11Mappings::_getAccessFlags(HardwareBuffer::Usage mUsage)
	{
		if(_isDynamic(mUsage))
			return D3D11_CPU_ACCESS_WRITE;
		else
			return 0;
	}

	TextureType D3D11Mappings::_getTexType(D3D11_SRV_DIMENSION type)
	{
		switch(type)
		{
		case D3D_SRV_DIMENSION_TEXTURE1D:
			return TEX_TYPE_1D;
		case D3D_SRV_DIMENSION_TEXTURE2D:
		case D3D_SRV_DIMENSION_TEXTURE2DMS:
			return TEX_TYPE_2D;
		case D3D_SRV_DIMENSION_TEXTURE2DARRAY:
		case D3D_SRV_DIMENSION_TEXTURE2DMSARRAY:
			return TEX_TYPE_2D_ARRAY;
		case D3D_SRV_DIMENSION_TEXTURE3D:
			return TEX_TYPE_3D;
		case D3D_SRV_DIMENSION_TEXTURECUBE:
			return TEX_TYPE_CUBE_MAP;
		default:
			// unknown
			return static_cast<TextureType>(0);
		}
	}
	//---------------------------------------------------------------------
	size_t D3D11Mappings::_getSizeInBytes(PixelFormat pf, size_t xcount, size_t ycount)
	{
		if(xcount == 0 || ycount == 0)
			return 0;

		if(PixelUtil::isCompressed(pf))
		{
			// D3D wants the width of one row of cells in bytes
			if (pf == PF_DXT1)
			{
				// 64 bits (8 bytes) per 4x4 block
				return std::max<size_t>(1, xcount / 4) * std::max<size_t>(1, ycount / 4) * 8;
			}
			else
			{
				// 128 bits (16 bytes) per 4x4 block
				return std::max<size_t>(1, xcount / 4) * std::max<size_t>(1, ycount / 4) * 16;
			}
		}
		else
		{
			return xcount * ycount * PixelUtil::getNumElemBytes(pf);
		}
	}

	UINT D3D11Mappings::_getTextureBindFlags(DXGI_FORMAT format, bool isdynamic)
	{
		if(isdynamic)
			return D3D11_BIND_SHADER_RESOURCE; 

		switch(format)
		{
		case DXGI_FORMAT_R32G32B32A32_TYPELESS:
		case DXGI_FORMAT_R32G32B32_TYPELESS:
		case DXGI_FORMAT_R32G32B32_FLOAT:
		case DXGI_FORMAT_R32G32B32_UINT:
		case DXGI_FORMAT_R32G32B32_SINT:
		case DXGI_FORMAT_R16G16B16A16_TYPELESS:
		case DXGI_FORMAT_R32G32_TYPELESS:
		case DXGI_FORMAT_R32G8X24_TYPELESS:
		case DXGI_FORMAT_D32_FLOAT_S8X24_UINT:
		case DXGI_FORMAT_R32_FLOAT_X8X24_TYPELESS:
		case DXGI_FORMAT_X32_TYPELESS_G8X24_UINT:
		case DXGI_FORMAT_R10G10B10A2_TYPELESS:
		case DXGI_FORMAT_R10G10B10_XR_BIAS_A2_UNORM:
		case DXGI_FORMAT_R8G8B8A8_TYPELESS:
		case DXGI_FORMAT_R16G16_TYPELESS:
		case DXGI_FORMAT_R32_TYPELESS:
		case DXGI_FORMAT_D32_FLOAT:
		case DXGI_FORMAT_R24G8_TYPELESS:
		case DXGI_FORMAT_D24_UNORM_S8_UINT:
		case DXGI_FORMAT_R24_UNORM_X8_TYPELESS:
		case DXGI_FORMAT_X24_TYPELESS_G8_UINT:
		case DXGI_FORMAT_R8G8_TYPELESS:
		case DXGI_FORMAT_R16_TYPELESS:
		case DXGI_FORMAT_D16_UNORM:
		case DXGI_FORMAT_R8_TYPELESS:
		case DXGI_FORMAT_R9G9B9E5_SHAREDEXP:
		case DXGI_FORMAT_R8G8_B8G8_UNORM:
		case DXGI_FORMAT_G8R8_G8B8_UNORM:
		case DXGI_FORMAT_BC1_TYPELESS:
		case DXGI_FORMAT_BC1_UNORM:
		case DXGI_FORMAT_BC1_UNORM_SRGB:
		case DXGI_FORMAT_BC2_TYPELESS:
		case DXGI_FORMAT_BC2_UNORM:
		case DXGI_FORMAT_BC2_UNORM_SRGB:
		case DXGI_FORMAT_BC3_TYPELESS:
		case DXGI_FORMAT_BC3_UNORM:
		case DXGI_FORMAT_BC3_UNORM_SRGB:
		case DXGI_FORMAT_BC4_TYPELESS:
		case DXGI_FORMAT_BC4_UNORM:
		case DXGI_FORMAT_BC4_SNORM:
		case DXGI_FORMAT_BC5_TYPELESS:
		case DXGI_FORMAT_BC5_UNORM:
		case DXGI_FORMAT_BC5_SNORM:
		case DXGI_FORMAT_B8G8R8A8_TYPELESS:
		case DXGI_FORMAT_B8G8R8X8_TYPELESS:
		case DXGI_FORMAT_BC6H_TYPELESS:
		case DXGI_FORMAT_BC6H_UF16:
		case DXGI_FORMAT_BC6H_SF16:
		case DXGI_FORMAT_BC7_TYPELESS:
		case DXGI_FORMAT_BC7_UNORM:
		case DXGI_FORMAT_BC7_UNORM_SRGB:
			return D3D11_BIND_SHADER_RESOURCE;
		default:
			return D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_RENDER_TARGET;
		}
	}

	UINT D3D11Mappings::_getTextureMiscFlags(UINT bindflags, TextureType textype, bool isdynamic)
	{
		if(isdynamic)
			return 0;

		UINT flags = 0;

		if(bindflags & D3D11_BIND_RENDER_TARGET)
			flags |= D3D11_RESOURCE_MISC_GENERATE_MIPS;

		if(textype == TEX_TYPE_CUBE_MAP)
			flags |= D3D11_RESOURCE_MISC_TEXTURECUBE;

		return flags;
	}
}