bgfx/src/renderer_d3d12.cpp

/*
 * Copyright 2011-2015 Branimir Karadzic. All rights reserved.
 * License: http://www.opensource.org/licenses/BSD-2-Clause
 */

#include "bgfx_p.h"

#if BGFX_CONFIG_RENDERER_DIRECT3D12
#	include "renderer_d3d12.h"

#	if !USE_D3D12_DYNAMIC_LIB
#		pragma comment(lib, "D3D12.lib")
#	endif // !USE_D3D12_DYNAMIC_LIB

namespace bgfx { namespace d3d12
{
	static wchar_t s_viewNameW[BGFX_CONFIG_MAX_VIEWS][256];

	struct PrimInfo
	{
		D3D_PRIMITIVE_TOPOLOGY m_toplogy;
		D3D12_PRIMITIVE_TOPOLOGY_TYPE m_topologyType;
		uint32_t m_min;
		uint32_t m_div;
		uint32_t m_sub;
	};

	static const PrimInfo s_primInfo[] =
	{
		{ D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST,  D3D12_PRIMITIVE_TOPOLOGY_TYPE_TRIANGLE,  3, 3, 0 },
		{ D3D_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP, D3D12_PRIMITIVE_TOPOLOGY_TYPE_TRIANGLE,  3, 1, 2 },
		{ D3D_PRIMITIVE_TOPOLOGY_LINELIST,      D3D12_PRIMITIVE_TOPOLOGY_TYPE_LINE,      2, 2, 0 },
		{ D3D_PRIMITIVE_TOPOLOGY_POINTLIST,     D3D12_PRIMITIVE_TOPOLOGY_TYPE_POINT,     1, 1, 0 },
		{ D3D_PRIMITIVE_TOPOLOGY_UNDEFINED,     D3D12_PRIMITIVE_TOPOLOGY_TYPE_UNDEFINED, 0, 0, 0 },
	};

	static const char* s_primName[] =
	{
		"TriList",
		"TriStrip",
		"Line",
		"Point",
	};
	BX_STATIC_ASSERT(BX_COUNTOF(s_primInfo) == BX_COUNTOF(s_primName)+1);

	struct DrawIndirectCommand
	{
//		D3D12_GPU_VIRTUAL_ADDRESS srv;
		D3D12_GPU_VIRTUAL_ADDRESS cbv;
		D3D12_VERTEX_BUFFER_VIEW vbv;
		D3D12_DRAW_ARGUMENTS draw;
	};

	struct DrawIndexedIndirectCommand
	{
//		D3D12_GPU_VIRTUAL_ADDRESS srv;
		D3D12_GPU_VIRTUAL_ADDRESS cbv;
		D3D12_VERTEX_BUFFER_VIEW vbv;
		D3D12_INDEX_BUFFER_VIEW ibv;
		D3D12_DRAW_INDEXED_ARGUMENTS drawIndexed;
	};

	static const uint32_t s_checkMsaa[] =
	{
		0,
		2,
		4,
		8,
		16,
	};

	static DXGI_SAMPLE_DESC s_msaa[] =
	{
		{  1, 0 },
		{  2, 0 },
		{  4, 0 },
		{  8, 0 },
		{ 16, 0 },
	};

	static const D3D12_BLEND s_blendFactor[][2] =
	{
		{ (D3D12_BLEND)0,               (D3D12_BLEND)0               }, // ignored
		{ D3D12_BLEND_ZERO,             D3D12_BLEND_ZERO             }, // ZERO
		{ D3D12_BLEND_ONE,              D3D12_BLEND_ONE              },	// ONE
		{ D3D12_BLEND_SRC_COLOR,        D3D12_BLEND_SRC_ALPHA        },	// SRC_COLOR
		{ D3D12_BLEND_INV_SRC_COLOR,    D3D12_BLEND_INV_SRC_ALPHA    },	// INV_SRC_COLOR
		{ D3D12_BLEND_SRC_ALPHA,        D3D12_BLEND_SRC_ALPHA        },	// SRC_ALPHA
		{ D3D12_BLEND_INV_SRC_ALPHA,    D3D12_BLEND_INV_SRC_ALPHA    },	// INV_SRC_ALPHA
		{ D3D12_BLEND_DEST_ALPHA,       D3D12_BLEND_DEST_ALPHA       },	// DST_ALPHA
		{ D3D12_BLEND_INV_DEST_ALPHA,   D3D12_BLEND_INV_DEST_ALPHA   },	// INV_DST_ALPHA
		{ D3D12_BLEND_DEST_COLOR,       D3D12_BLEND_DEST_ALPHA       },	// DST_COLOR
		{ D3D12_BLEND_INV_DEST_COLOR,   D3D12_BLEND_INV_DEST_ALPHA   },	// INV_DST_COLOR
		{ D3D12_BLEND_SRC_ALPHA_SAT,    D3D12_BLEND_ONE              },	// SRC_ALPHA_SAT
		{ D3D12_BLEND_BLEND_FACTOR,     D3D12_BLEND_BLEND_FACTOR     },	// FACTOR
		{ D3D12_BLEND_INV_BLEND_FACTOR, D3D12_BLEND_INV_BLEND_FACTOR },	// INV_FACTOR
	};

	static const D3D12_BLEND_OP s_blendEquation[] =
	{
		D3D12_BLEND_OP_ADD,
		D3D12_BLEND_OP_SUBTRACT,
		D3D12_BLEND_OP_REV_SUBTRACT,
		D3D12_BLEND_OP_MIN,
		D3D12_BLEND_OP_MAX,
	};

	static const D3D12_COMPARISON_FUNC s_cmpFunc[] =
	{
		D3D12_COMPARISON_FUNC(0), // ignored
		D3D12_COMPARISON_FUNC_LESS,
		D3D12_COMPARISON_FUNC_LESS_EQUAL,
		D3D12_COMPARISON_FUNC_EQUAL,
		D3D12_COMPARISON_FUNC_GREATER_EQUAL,
		D3D12_COMPARISON_FUNC_GREATER,
		D3D12_COMPARISON_FUNC_NOT_EQUAL,
		D3D12_COMPARISON_FUNC_NEVER,
		D3D12_COMPARISON_FUNC_ALWAYS,
	};

	static const D3D12_STENCIL_OP s_stencilOp[] =
	{
		D3D12_STENCIL_OP_ZERO,
		D3D12_STENCIL_OP_KEEP,
		D3D12_STENCIL_OP_REPLACE,
		D3D12_STENCIL_OP_INCR,
		D3D12_STENCIL_OP_INCR_SAT,
		D3D12_STENCIL_OP_DECR,
		D3D12_STENCIL_OP_DECR_SAT,
		D3D12_STENCIL_OP_INVERT,
	};

	static const D3D12_CULL_MODE s_cullMode[] =
	{
		D3D12_CULL_MODE_NONE,
		D3D12_CULL_MODE_FRONT,
		D3D12_CULL_MODE_BACK,
	};

	static const D3D12_TEXTURE_ADDRESS_MODE s_textureAddress[] =
	{
		D3D12_TEXTURE_ADDRESS_MODE_WRAP,
		D3D12_TEXTURE_ADDRESS_MODE_MIRROR,
		D3D12_TEXTURE_ADDRESS_MODE_CLAMP,
	};

	/*
	 * D3D11_FILTER_MIN_MAG_MIP_POINT               = 0x00,
	 * D3D11_FILTER_MIN_MAG_POINT_MIP_LINEAR        = 0x01,
	 * D3D11_FILTER_MIN_POINT_MAG_LINEAR_MIP_POINT  = 0x04,
	 * D3D11_FILTER_MIN_POINT_MAG_MIP_LINEAR        = 0x05,
	 * D3D11_FILTER_MIN_LINEAR_MAG_MIP_POINT        = 0x10,
	 * D3D11_FILTER_MIN_LINEAR_MAG_POINT_MIP_LINEAR = 0x11,
	 * D3D11_FILTER_MIN_MAG_LINEAR_MIP_POINT        = 0x14,
	 * D3D11_FILTER_MIN_MAG_MIP_LINEAR              = 0x15,
	 * D3D11_FILTER_ANISOTROPIC                     = 0x55,
	 *
	 * D3D11_COMPARISON_FILTERING_BIT               = 0x80,
	 * D3D11_ANISOTROPIC_FILTERING_BIT              = 0x40,
	 *
	 * According to D3D11_FILTER enum bits for mip, mag and mip are:
	 * 0x10 // MIN_LINEAR
	 * 0x04 // MAG_LINEAR
	 * 0x01 // MIP_LINEAR
	 */

	static const uint8_t s_textureFilter[3][3] =
	{
		{
			0x10, // min linear
			0x00, // min point
			0x55, // anisotropic
		},
		{
			0x04, // mag linear
			0x00, // mag point
			0x55, // anisotropic
		},
		{
			0x01, // mip linear
			0x00, // mip point
			0x55, // anisotropic
		},
	};

	struct TextureFormatInfo
	{
		DXGI_FORMAT m_fmt;
		DXGI_FORMAT m_fmtSrv;
		DXGI_FORMAT m_fmtDsv;
		DXGI_FORMAT m_fmtSrgb;
	};

	static const TextureFormatInfo s_textureFormat[] =
	{
		{ DXGI_FORMAT_BC1_UNORM,          DXGI_FORMAT_BC1_UNORM,             DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_BC1_UNORM_SRGB      }, // BC1
		{ DXGI_FORMAT_BC2_UNORM,          DXGI_FORMAT_BC2_UNORM,             DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_BC2_UNORM_SRGB      }, // BC2
		{ DXGI_FORMAT_BC3_UNORM,          DXGI_FORMAT_BC3_UNORM,             DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_BC3_UNORM_SRGB      }, // BC3
		{ DXGI_FORMAT_BC4_UNORM,          DXGI_FORMAT_BC4_UNORM,             DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // BC4
		{ DXGI_FORMAT_BC5_UNORM,          DXGI_FORMAT_BC5_UNORM,             DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // BC5
		{ DXGI_FORMAT_BC6H_SF16,          DXGI_FORMAT_BC6H_SF16,             DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // BC6H
		{ DXGI_FORMAT_BC7_UNORM,          DXGI_FORMAT_BC7_UNORM,             DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_BC7_UNORM_SRGB      }, // BC7
		{ DXGI_FORMAT_UNKNOWN,            DXGI_FORMAT_UNKNOWN,               DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // ETC1
		{ DXGI_FORMAT_UNKNOWN,            DXGI_FORMAT_UNKNOWN,               DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // ETC2
		{ DXGI_FORMAT_UNKNOWN,            DXGI_FORMAT_UNKNOWN,               DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // ETC2A
		{ DXGI_FORMAT_UNKNOWN,            DXGI_FORMAT_UNKNOWN,               DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // ETC2A1
		{ DXGI_FORMAT_UNKNOWN,            DXGI_FORMAT_UNKNOWN,               DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // PTC12
		{ DXGI_FORMAT_UNKNOWN,            DXGI_FORMAT_UNKNOWN,               DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // PTC14
		{ DXGI_FORMAT_UNKNOWN,            DXGI_FORMAT_UNKNOWN,               DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // PTC12A
		{ DXGI_FORMAT_UNKNOWN,            DXGI_FORMAT_UNKNOWN,               DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // PTC14A
		{ DXGI_FORMAT_UNKNOWN,            DXGI_FORMAT_UNKNOWN,               DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // PTC22
		{ DXGI_FORMAT_UNKNOWN,            DXGI_FORMAT_UNKNOWN,               DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // PTC24
		{ DXGI_FORMAT_UNKNOWN,            DXGI_FORMAT_UNKNOWN,               DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // Unknown
		{ DXGI_FORMAT_R1_UNORM,           DXGI_FORMAT_R1_UNORM,              DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // R1
		{ DXGI_FORMAT_R8_UNORM,           DXGI_FORMAT_R8_UNORM,              DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // R8
		{ DXGI_FORMAT_R16_UNORM,          DXGI_FORMAT_R16_UNORM,             DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // R16
		{ DXGI_FORMAT_R16_FLOAT,          DXGI_FORMAT_R16_FLOAT,             DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // R16F
		{ DXGI_FORMAT_R32_UINT,           DXGI_FORMAT_R32_UINT,              DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // R32
		{ DXGI_FORMAT_R32_FLOAT,          DXGI_FORMAT_R32_FLOAT,             DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // R32F
		{ DXGI_FORMAT_R8G8_UNORM,         DXGI_FORMAT_R8G8_UNORM,            DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // RG8
		{ DXGI_FORMAT_R16G16_UNORM,       DXGI_FORMAT_R16G16_UNORM,          DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // RG16
		{ DXGI_FORMAT_R16G16_FLOAT,       DXGI_FORMAT_R16G16_FLOAT,          DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // RG16F
		{ DXGI_FORMAT_R32G32_UINT,        DXGI_FORMAT_R32G32_UINT,           DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // RG32
		{ DXGI_FORMAT_R32G32_FLOAT,       DXGI_FORMAT_R32G32_FLOAT,          DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // RG32F
		{ DXGI_FORMAT_B8G8R8A8_UNORM,     DXGI_FORMAT_B8G8R8A8_UNORM,        DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_B8G8R8A8_UNORM_SRGB }, // BGRA8
		{ DXGI_FORMAT_R8G8B8A8_UNORM,     DXGI_FORMAT_R8G8B8A8_UNORM,        DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_R8G8B8A8_UNORM_SRGB }, // RGBA8
		{ DXGI_FORMAT_R16G16B16A16_UNORM, DXGI_FORMAT_R16G16B16A16_UNORM,    DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // RGBA16
		{ DXGI_FORMAT_R16G16B16A16_FLOAT, DXGI_FORMAT_R16G16B16A16_FLOAT,    DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // RGBA16F
		{ DXGI_FORMAT_R32G32B32A32_UINT,  DXGI_FORMAT_R32G32B32A32_UINT,     DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // RGBA32
		{ DXGI_FORMAT_R32G32B32A32_FLOAT, DXGI_FORMAT_R32G32B32A32_FLOAT,    DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // RGBA32F
		{ DXGI_FORMAT_B5G6R5_UNORM,       DXGI_FORMAT_B5G6R5_UNORM,          DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // R5G6B5
		{ DXGI_FORMAT_B4G4R4A4_UNORM,     DXGI_FORMAT_B4G4R4A4_UNORM,        DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // RGBA4
		{ DXGI_FORMAT_B5G5R5A1_UNORM,     DXGI_FORMAT_B5G5R5A1_UNORM,        DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // RGB5A1
		{ DXGI_FORMAT_R10G10B10A2_UNORM,  DXGI_FORMAT_R10G10B10A2_UNORM,     DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // RGB10A2
		{ DXGI_FORMAT_R11G11B10_FLOAT,    DXGI_FORMAT_R11G11B10_FLOAT,       DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // R11G11B10F
		{ DXGI_FORMAT_UNKNOWN,            DXGI_FORMAT_UNKNOWN,               DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN             }, // UnknownDepth
		{ DXGI_FORMAT_R16_TYPELESS,       DXGI_FORMAT_R16_UNORM,             DXGI_FORMAT_D16_UNORM,         DXGI_FORMAT_UNKNOWN             }, // D16
		{ DXGI_FORMAT_R24G8_TYPELESS,     DXGI_FORMAT_R24_UNORM_X8_TYPELESS, DXGI_FORMAT_D24_UNORM_S8_UINT, DXGI_FORMAT_UNKNOWN             }, // D24
		{ DXGI_FORMAT_R24G8_TYPELESS,     DXGI_FORMAT_R24_UNORM_X8_TYPELESS, DXGI_FORMAT_D24_UNORM_S8_UINT, DXGI_FORMAT_UNKNOWN             }, // D24S8
		{ DXGI_FORMAT_R24G8_TYPELESS,     DXGI_FORMAT_R24_UNORM_X8_TYPELESS, DXGI_FORMAT_D24_UNORM_S8_UINT, DXGI_FORMAT_UNKNOWN             }, // D32
		{ DXGI_FORMAT_R32_TYPELESS,       DXGI_FORMAT_R32_FLOAT,             DXGI_FORMAT_D32_FLOAT,         DXGI_FORMAT_UNKNOWN             }, // D16F
		{ DXGI_FORMAT_R32_TYPELESS,       DXGI_FORMAT_R32_FLOAT,             DXGI_FORMAT_D32_FLOAT,         DXGI_FORMAT_UNKNOWN             }, // D24F
		{ DXGI_FORMAT_R32_TYPELESS,       DXGI_FORMAT_R32_FLOAT,             DXGI_FORMAT_D32_FLOAT,         DXGI_FORMAT_UNKNOWN             }, // D32F
		{ DXGI_FORMAT_R24G8_TYPELESS,     DXGI_FORMAT_R24_UNORM_X8_TYPELESS, DXGI_FORMAT_D24_UNORM_S8_UINT, DXGI_FORMAT_UNKNOWN             }, // D0S8
	};
	BX_STATIC_ASSERT(TextureFormat::Count == BX_COUNTOF(s_textureFormat) );

	static const D3D12_INPUT_ELEMENT_DESC s_attrib[] =
	{
		{ "POSITION",     0, DXGI_FORMAT_R32G32B32_FLOAT, 0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
		{ "NORMAL",       0, DXGI_FORMAT_R32G32B32_FLOAT, 0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
		{ "TANGENT",      0, DXGI_FORMAT_R32G32B32_FLOAT, 0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
		{ "BITANGENT",    0, DXGI_FORMAT_R32G32B32_FLOAT, 0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
		{ "COLOR",        0, DXGI_FORMAT_R8G8B8A8_UINT,   0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
		{ "COLOR",        1, DXGI_FORMAT_R8G8B8A8_UINT,   0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
		{ "BLENDINDICES", 0, DXGI_FORMAT_R8G8B8A8_UINT,   0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
		{ "BLENDWEIGHT",  0, DXGI_FORMAT_R32G32B32_FLOAT, 0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
		{ "TEXCOORD",     0, DXGI_FORMAT_R32G32_FLOAT,    0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
		{ "TEXCOORD",     1, DXGI_FORMAT_R32G32_FLOAT,    0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
		{ "TEXCOORD",     2, DXGI_FORMAT_R32G32_FLOAT,    0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
		{ "TEXCOORD",     3, DXGI_FORMAT_R32G32_FLOAT,    0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
		{ "TEXCOORD",     4, DXGI_FORMAT_R32G32_FLOAT,    0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
		{ "TEXCOORD",     5, DXGI_FORMAT_R32G32_FLOAT,    0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
		{ "TEXCOORD",     6, DXGI_FORMAT_R32G32_FLOAT,    0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
		{ "TEXCOORD",     7, DXGI_FORMAT_R32G32_FLOAT,    0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
	};
	BX_STATIC_ASSERT(Attrib::Count == BX_COUNTOF(s_attrib) );

	static const DXGI_FORMAT s_attribType[][4][2] =
	{
		{ // Uint8
			{ DXGI_FORMAT_R8_UINT,            DXGI_FORMAT_R8_UNORM           },
			{ DXGI_FORMAT_R8G8_UINT,          DXGI_FORMAT_R8G8_UNORM         },
			{ DXGI_FORMAT_R8G8B8A8_UINT,      DXGI_FORMAT_R8G8B8A8_UNORM     },
			{ DXGI_FORMAT_R8G8B8A8_UINT,      DXGI_FORMAT_R8G8B8A8_UNORM     },
		},
		{ // Uint10
			{ DXGI_FORMAT_R10G10B10A2_UINT,   DXGI_FORMAT_R10G10B10A2_UNORM  },
			{ DXGI_FORMAT_R10G10B10A2_UINT,   DXGI_FORMAT_R10G10B10A2_UNORM  },
			{ DXGI_FORMAT_R10G10B10A2_UINT,   DXGI_FORMAT_R10G10B10A2_UNORM  },
			{ DXGI_FORMAT_R10G10B10A2_UINT,   DXGI_FORMAT_R10G10B10A2_UNORM  },
		},
		{ // Int16
			{ DXGI_FORMAT_R16_SINT,           DXGI_FORMAT_R16_SNORM          },
			{ DXGI_FORMAT_R16G16_SINT,        DXGI_FORMAT_R16G16_SNORM       },
			{ DXGI_FORMAT_R16G16B16A16_SINT,  DXGI_FORMAT_R16G16B16A16_SNORM },
			{ DXGI_FORMAT_R16G16B16A16_SINT,  DXGI_FORMAT_R16G16B16A16_SNORM },
		},
		{ // Half
			{ DXGI_FORMAT_R16_FLOAT,          DXGI_FORMAT_R16_FLOAT          },
			{ DXGI_FORMAT_R16G16_FLOAT,       DXGI_FORMAT_R16G16_FLOAT       },
			{ DXGI_FORMAT_R16G16B16A16_FLOAT, DXGI_FORMAT_R16G16B16A16_FLOAT },
			{ DXGI_FORMAT_R16G16B16A16_FLOAT, DXGI_FORMAT_R16G16B16A16_FLOAT },
		},
		{ // Float
			{ DXGI_FORMAT_R32_FLOAT,          DXGI_FORMAT_R32_FLOAT          },
			{ DXGI_FORMAT_R32G32_FLOAT,       DXGI_FORMAT_R32G32_FLOAT       },
			{ DXGI_FORMAT_R32G32B32_FLOAT,    DXGI_FORMAT_R32G32B32_FLOAT    },
			{ DXGI_FORMAT_R32G32B32A32_FLOAT, DXGI_FORMAT_R32G32B32A32_FLOAT },
		},
	};
	BX_STATIC_ASSERT(AttribType::Count == BX_COUNTOF(s_attribType) );

	static D3D12_INPUT_ELEMENT_DESC* fillVertexDecl(D3D12_INPUT_ELEMENT_DESC* _out, const VertexDecl& _decl)
	{
		D3D12_INPUT_ELEMENT_DESC* elem = _out;

		for (uint32_t attr = 0; attr < Attrib::Count; ++attr)
		{
			if (UINT16_MAX != _decl.m_attributes[attr])
			{
				memcpy(elem, &s_attrib[attr], sizeof(D3D12_INPUT_ELEMENT_DESC) );

				if (0 == _decl.m_attributes[attr])
				{
					elem->AlignedByteOffset = 0;
				}
				else
				{
					uint8_t num;
					AttribType::Enum type;
					bool normalized;
					bool asInt;
					_decl.decode(Attrib::Enum(attr), num, type, normalized, asInt);
					elem->Format = s_attribType[type][num-1][normalized];
					elem->AlignedByteOffset = _decl.m_offset[attr];
				}

				++elem;
			}
		}

		return elem;
	}

	void setResourceBarrier(ID3D12GraphicsCommandList* _commandList, ID3D12Resource* _resource, D3D12_RESOURCE_STATES _stateBefore, D3D12_RESOURCE_STATES _stateAfter)
	{
		D3D12_RESOURCE_BARRIER barrier;
		barrier.Type  = D3D12_RESOURCE_BARRIER_TYPE_TRANSITION;
		barrier.Flags = D3D12_RESOURCE_BARRIER_FLAG_NONE;
		barrier.Transition.pResource   = _resource;
		barrier.Transition.Subresource = D3D12_RESOURCE_BARRIER_ALL_SUBRESOURCES;
		barrier.Transition.StateBefore = _stateBefore;
		barrier.Transition.StateAfter  = _stateAfter;
		_commandList->ResourceBarrier(1, &barrier);
	}

	struct HeapProperty
	{
		enum Enum
		{
			Default,
			Upload,
			ReadBack,

			Count
		};

		D3D12_HEAP_PROPERTIES m_properties;
		D3D12_RESOURCE_STATES m_state;
	};

	static const HeapProperty s_heapProperties[] =
	{
		{ { D3D12_HEAP_TYPE_DEFAULT,  D3D12_CPU_PAGE_PROPERTY_UNKNOWN, D3D12_MEMORY_POOL_UNKNOWN, 1, 1 }, D3D12_RESOURCE_STATE_COMMON       },
		{ { D3D12_HEAP_TYPE_UPLOAD,   D3D12_CPU_PAGE_PROPERTY_UNKNOWN, D3D12_MEMORY_POOL_UNKNOWN, 1, 1 }, D3D12_RESOURCE_STATE_GENERIC_READ },
		{ { D3D12_HEAP_TYPE_READBACK, D3D12_CPU_PAGE_PROPERTY_UNKNOWN, D3D12_MEMORY_POOL_UNKNOWN, 1, 1 }, D3D12_RESOURCE_STATE_COPY_DEST    },
	};
	BX_STATIC_ASSERT(BX_COUNTOF(s_heapProperties) == HeapProperty::Count);

	ID3D12Resource* createCommittedResource(ID3D12Device* _device, HeapProperty::Enum _heapProperty, D3D12_RESOURCE_DESC* _resourceDesc, D3D12_CLEAR_VALUE* _clearValue)
	{
		const HeapProperty& heapProperty = s_heapProperties[_heapProperty];
		ID3D12Resource* resource;
		DX_CHECK(_device->CreateCommittedResource(&heapProperty.m_properties
				, D3D12_HEAP_FLAG_NONE
				, _resourceDesc
				, heapProperty.m_state
				, _clearValue
				, __uuidof(ID3D12Resource)
				, (void**)&resource
				) );

		return resource;
	}

	ID3D12Resource* createCommittedResource(ID3D12Device* _device, HeapProperty::Enum _heapProperty, uint64_t _size, D3D12_RESOURCE_FLAGS _flags = D3D12_RESOURCE_FLAG_NONE)
	{
		D3D12_RESOURCE_DESC resourceDesc;
		resourceDesc.Dimension = D3D12_RESOURCE_DIMENSION_BUFFER;
		resourceDesc.Alignment = 0;
		resourceDesc.Width     = _size;
		resourceDesc.Height    = 1;
		resourceDesc.DepthOrArraySize = 1;
		resourceDesc.MipLevels = 1;
		resourceDesc.Format             = DXGI_FORMAT_UNKNOWN;
		resourceDesc.SampleDesc.Count   = 1;
		resourceDesc.SampleDesc.Quality = 0;
		resourceDesc.Layout = D3D12_TEXTURE_LAYOUT_ROW_MAJOR;
		resourceDesc.Flags  = _flags;

		return createCommittedResource(_device, _heapProperty, &resourceDesc, NULL);
	}

	BX_NO_INLINE void setDebugObjectName(ID3D12Object* _object, const char* _format, ...)
	{
		if (BX_ENABLED(BGFX_CONFIG_DEBUG_OBJECT_NAME) )
		{
			char temp[2048];
			va_list argList;
			va_start(argList, _format);
			int size = bx::uint32_min(sizeof(temp)-1, vsnprintf(temp, sizeof(temp), _format, argList) );
			va_end(argList);
			temp[size] = '\0';

			wchar_t* wtemp = (wchar_t*)alloca( (size+1)*2);
			mbstowcs(wtemp, temp, size+1);
			_object->SetName(wtemp);
		}
	}

#if USE_D3D12_DYNAMIC_LIB
	static PFN_D3D12_CREATE_DEVICE            D3D12CreateDevice;
	static PFN_D3D12_GET_DEBUG_INTERFACE      D3D12GetDebugInterface;
	static PFN_D3D12_SERIALIZE_ROOT_SIGNATURE D3D12SerializeRootSignature;
	static PFN_CREATE_DXGI_FACTORY            CreateDXGIFactory1;
#endif // USE_D3D12_DYNAMIC_LIB

	struct RendererContextD3D12 : public RendererContextI
	{
		RendererContextD3D12()
			: m_wireframe(false)
			, m_flags(BGFX_RESET_NONE)
			, m_fsChanges(0)
			, m_vsChanges(0)
			, m_backBufferColorIdx(0)
			, m_rtMsaa(false)
		{
		}

		~RendererContextD3D12()
		{
		}

		bool init()
		{
			uint32_t errorState = 0;
			LUID luid;

			m_fbh.idx = invalidHandle;
			memset(m_uniforms, 0, sizeof(m_uniforms) );
			memset(&m_resolution, 0, sizeof(m_resolution) );

#if USE_D3D12_DYNAMIC_LIB
			m_d3d12dll = bx::dlopen("d3d12.dll");
			BX_WARN(NULL != m_d3d12dll, "Failed to load d3d12.dll.");
			if (NULL == m_d3d12dll)
			{
				goto error;
			}

			errorState = 1;

			D3D12CreateDevice = (PFN_D3D12_CREATE_DEVICE)bx::dlsym(m_d3d12dll, "D3D12CreateDevice");
			BX_WARN(NULL != D3D12CreateDevice, "Function D3D12CreateDevice not found.");

			D3D12GetDebugInterface = (PFN_D3D12_GET_DEBUG_INTERFACE)bx::dlsym(m_d3d12dll, "D3D12GetDebugInterface");
			BX_WARN(NULL != D3D12GetDebugInterface, "Function D3D12GetDebugInterface not found.");

			D3D12SerializeRootSignature = (PFN_D3D12_SERIALIZE_ROOT_SIGNATURE)bx::dlsym(m_d3d12dll, "D3D12SerializeRootSignature");
			BX_WARN(NULL != D3D12SerializeRootSignature, "Function D3D12SerializeRootSignature not found.");

			if (NULL == D3D12CreateDevice
			||  NULL == D3D12GetDebugInterface
			||  NULL == D3D12SerializeRootSignature)
			{
				goto error;
			}

			m_dxgidll = bx::dlopen("dxgi.dll");
			BX_WARN(NULL != m_dxgidll, "Failed to load dxgi.dll.");

			if (NULL == m_dxgidll)
			{
				goto error;
			}

			errorState = 2;

			CreateDXGIFactory1 = (PFN_CREATE_DXGI_FACTORY)bx::dlsym(m_dxgidll, "CreateDXGIFactory1");
			BX_WARN(NULL != CreateDXGIFactory1, "Function CreateDXGIFactory1 not found.");

			if (NULL == CreateDXGIFactory1)
			{
				goto error;
			}
#else
			errorState = 2;
#endif // USE_D3D12_DYNAMIC_LIB

			HRESULT hr;

			hr = CreateDXGIFactory1(__uuidof(m_factory), (void**)&m_factory);
			BX_WARN(SUCCEEDED(hr), "Unable to create DXGI factory.");

			if (FAILED(hr) )
			{
				goto error;
			}

			errorState = 3;

			m_adapter = NULL;
			m_driverType = D3D_DRIVER_TYPE_HARDWARE;

			IDXGIAdapter* adapter;
			for (uint32_t ii = 0; DXGI_ERROR_NOT_FOUND != m_factory->EnumAdapters(ii, &adapter); ++ii)
			{
				DXGI_ADAPTER_DESC desc;
				hr = adapter->GetDesc(&desc);
				if (SUCCEEDED(hr) )
				{
					BX_TRACE("Adapter #%d", ii);

					char description[BX_COUNTOF(desc.Description)];
					wcstombs(description, desc.Description, BX_COUNTOF(desc.Description) );
					BX_TRACE("\tDescription: %s", description);
					BX_TRACE("\tVendorId: 0x%08x, DeviceId: 0x%08x, SubSysId: 0x%08x, Revision: 0x%08x"
							, desc.VendorId
							, desc.DeviceId
							, desc.SubSysId
							, desc.Revision
							);
					BX_TRACE("\tMemory: %" PRIi64 " (video), %" PRIi64 " (system), %" PRIi64 " (shared)"
							, desc.DedicatedVideoMemory
							, desc.DedicatedSystemMemory
							, desc.SharedSystemMemory
							);

					g_caps.gpu[ii].vendorId = (uint16_t)desc.VendorId;
					g_caps.gpu[ii].deviceId = (uint16_t)desc.DeviceId;
					++g_caps.numGPUs;

					if ( (BGFX_PCI_ID_NONE != g_caps.vendorId ||             0 != g_caps.deviceId)
					&&   (BGFX_PCI_ID_NONE == g_caps.vendorId || desc.VendorId == g_caps.vendorId)
					&&   (0 == g_caps.deviceId                || desc.DeviceId == g_caps.deviceId) )
					{
						m_adapter = adapter;
						m_adapter->AddRef();
						m_driverType = D3D_DRIVER_TYPE_UNKNOWN;
					}

					if (BX_ENABLED(BGFX_CONFIG_DEBUG_PERFHUD)
					&&  0 != strstr(description, "PerfHUD") )
					{
						m_adapter = adapter;
						m_driverType = D3D_DRIVER_TYPE_REFERENCE;
					}
				}

				DX_RELEASE(adapter, adapter == m_adapter ? 1 : 0);
			}

			if (BX_ENABLED(BGFX_CONFIG_DEBUG) )
			{
				ID3D12Debug* debug;
				hr = D3D12GetDebugInterface(__uuidof(ID3D12Debug), (void**)&debug);

				if (SUCCEEDED(hr) )
				{
					debug->EnableDebugLayer();
				}
			}

			hr = D3D12CreateDevice(m_adapter
					, D3D_FEATURE_LEVEL_11_0
					, __uuidof(ID3D12Device)
					, (void**)&m_device
					);
			BX_WARN(SUCCEEDED(hr), "Unable to create Direct3D12 device.");

			if (NULL != m_adapter)
			{
				DX_RELEASE(m_adapter, 2);
			}

			if (FAILED(hr) )
			{
				goto error;
			}

			errorState = 4;

			memset(&m_adapterDesc, 0, sizeof(m_adapterDesc) );
			luid = m_device->GetAdapterLuid();
			for (uint32_t ii = 0; DXGI_ERROR_NOT_FOUND != m_factory->EnumAdapters(ii, &adapter); ++ii)
			{
				adapter->GetDesc(&m_adapterDesc);
				DX_RELEASE(adapter, 0);
				if (m_adapterDesc.AdapterLuid.LowPart  == luid.LowPart
				&&  m_adapterDesc.AdapterLuid.HighPart == luid.HighPart)
				{
					break;
				}
			}

			g_caps.vendorId = (uint16_t)m_adapterDesc.VendorId;
			g_caps.deviceId = (uint16_t)m_adapterDesc.DeviceId;

			uint32_t numNodes = m_device->GetNodeCount();
			BX_TRACE("D3D12 GPU Architecture (num nodes: %d):", numNodes);
			for (uint32_t ii = 0; ii < numNodes; ++ii)
			{
				D3D12_FEATURE_DATA_ARCHITECTURE architecture;
				architecture.NodeIndex = ii;
				DX_CHECK(m_device->CheckFeatureSupport(D3D12_FEATURE_ARCHITECTURE, &architecture, sizeof(architecture) ) );
				BX_TRACE("\tNode % 2d: TileBasedRenderer %d, UMA %d, CacheCoherentUMA %d"
						, ii
						, architecture.TileBasedRenderer
						, architecture.UMA
						, architecture.CacheCoherentUMA
						);
				if (0 == ii)
				{
					memcpy(&m_architecture, &architecture, sizeof(architecture) );
				}
			}

			DX_CHECK(m_device->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS, &m_options, sizeof(m_options) ) );
			BX_TRACE("D3D12 options:")
			BX_TRACE("\tTiledResourcesTier %d", m_options.TiledResourcesTier);
			BX_TRACE("\tResourceBindingTier %d", m_options.ResourceBindingTier);
			BX_TRACE("\tConservativeRasterizationTier %d", m_options.ConservativeRasterizationTier);
			BX_TRACE("\tCrossNodeSharingTier %d", m_options.CrossNodeSharingTier);
			BX_TRACE("\tResourceHeapTier %d", m_options.ResourceHeapTier);

			m_cmd.init(m_device);

			m_scd.BufferDesc.Width  = BGFX_DEFAULT_WIDTH;
			m_scd.BufferDesc.Height = BGFX_DEFAULT_HEIGHT;
			m_scd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
			m_scd.BufferDesc.Scaling                 = DXGI_MODE_SCALING_STRETCHED;
			m_scd.BufferDesc.ScanlineOrdering        = DXGI_MODE_SCANLINE_ORDER_UNSPECIFIED;
			m_scd.BufferDesc.RefreshRate.Numerator   = 60;
			m_scd.BufferDesc.RefreshRate.Denominator = 1;
			m_scd.SampleDesc.Count   = 1;
			m_scd.SampleDesc.Quality = 0;
			m_scd.BufferUsage  = DXGI_USAGE_RENDER_TARGET_OUTPUT;
			m_scd.BufferCount  = bx::uint32_min(BX_COUNTOF(m_backBufferColor), 4);
			m_scd.OutputWindow = (HWND)g_platformData.nwh;
			m_scd.Windowed     = true;
			m_scd.SwapEffect   = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL;
			m_scd.Flags        = DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH;

			BX_CHECK(m_scd.BufferCount <= BX_COUNTOF(m_backBufferColor), "Swap chain buffer count %d (max %d)."
					, m_scd.BufferCount
					, BX_COUNTOF(m_backBufferColor)
					);
			hr = m_factory->CreateSwapChain(m_cmd.m_commandQueue
					, &m_scd
					, reinterpret_cast<IDXGISwapChain**>(&m_swapChain)
					);
			BX_WARN(SUCCEEDED(hr), "Failed to create swap chain.");
			if (FAILED(hr) )
			{
				goto error;
			}

			m_presentElapsed = 0;

			{
				m_resolution.m_width  = BGFX_DEFAULT_WIDTH;
				m_resolution.m_height = BGFX_DEFAULT_HEIGHT;

				DX_CHECK(m_factory->MakeWindowAssociation( (HWND)g_platformData.nwh
						, 0
						| DXGI_MWA_NO_WINDOW_CHANGES
						| DXGI_MWA_NO_ALT_ENTER
						) );

				m_numWindows = 1;

				if (BX_ENABLED(BGFX_CONFIG_DEBUG) )
				{
					hr = m_device->QueryInterface(__uuidof(ID3D12InfoQueue), (void**)&m_infoQueue);

					if (SUCCEEDED(hr) )
					{
						m_infoQueue->SetBreakOnSeverity(D3D12_MESSAGE_SEVERITY_CORRUPTION, true);
						m_infoQueue->SetBreakOnSeverity(D3D12_MESSAGE_SEVERITY_ERROR,      true);
						m_infoQueue->SetBreakOnSeverity(D3D12_MESSAGE_SEVERITY_WARNING,    false);

						D3D12_INFO_QUEUE_FILTER filter;
						memset(&filter, 0, sizeof(filter) );

						D3D12_MESSAGE_CATEGORY catlist[] =
						{
							D3D12_MESSAGE_CATEGORY_STATE_CREATION,
							D3D12_MESSAGE_CATEGORY_EXECUTION,
						};
						filter.DenyList.NumCategories = BX_COUNTOF(catlist);
						filter.DenyList.pCategoryList = catlist;
						m_infoQueue->PushStorageFilter(&filter);

						DX_RELEASE_WARNONLY(m_infoQueue, 19);
					}
				}

				D3D12_DESCRIPTOR_HEAP_DESC rtvDescHeap;
				rtvDescHeap.NumDescriptors = 0
						+ BX_COUNTOF(m_backBufferColor)
						+ BGFX_CONFIG_MAX_FRAME_BUFFERS*BGFX_CONFIG_MAX_FRAME_BUFFER_ATTACHMENTS
						;
				rtvDescHeap.Type     = D3D12_DESCRIPTOR_HEAP_TYPE_RTV;
				rtvDescHeap.Flags    = D3D12_DESCRIPTOR_HEAP_FLAG_NONE;
				rtvDescHeap.NodeMask = 1;
				DX_CHECK(m_device->CreateDescriptorHeap(&rtvDescHeap
						, __uuidof(ID3D12DescriptorHeap)
						, (void**)&m_rtvDescriptorHeap
						) );

				D3D12_DESCRIPTOR_HEAP_DESC dsvDescHeap;
				dsvDescHeap.NumDescriptors = 0
						+ 1 // reserved for depth backbuffer.
						+ BGFX_CONFIG_MAX_FRAME_BUFFERS
						;
				dsvDescHeap.Type     = D3D12_DESCRIPTOR_HEAP_TYPE_DSV;
				dsvDescHeap.Flags    = D3D12_DESCRIPTOR_HEAP_FLAG_NONE;
				dsvDescHeap.NodeMask = 1;
				DX_CHECK(m_device->CreateDescriptorHeap(&dsvDescHeap
						, __uuidof(ID3D12DescriptorHeap)
						, (void**)&m_dsvDescriptorHeap
						) );

				for (uint32_t ii = 0; ii < BX_COUNTOF(m_scratchBuffer); ++ii)
				{
					m_scratchBuffer[ii].create(BGFX_CONFIG_MAX_DRAW_CALLS*1024
							, BGFX_CONFIG_MAX_TEXTURES + BGFX_CONFIG_MAX_SHADERS + BGFX_CONFIG_MAX_DRAW_CALLS
							);
				}
				m_samplerAllocator.create(D3D12_DESCRIPTOR_HEAP_TYPE_SAMPLER
						, 1024
						, BGFX_CONFIG_MAX_TEXTURE_SAMPLERS
						);

				D3D12_DESCRIPTOR_RANGE descRange[] =
				{
					{ D3D12_DESCRIPTOR_RANGE_TYPE_SAMPLER, BGFX_CONFIG_MAX_TEXTURE_SAMPLERS, 0, 0, D3D12_DESCRIPTOR_RANGE_OFFSET_APPEND },
					{ D3D12_DESCRIPTOR_RANGE_TYPE_SRV,     BGFX_CONFIG_MAX_TEXTURE_SAMPLERS, 0, 0, D3D12_DESCRIPTOR_RANGE_OFFSET_APPEND },
					{ D3D12_DESCRIPTOR_RANGE_TYPE_CBV,     1,                                0, 0, D3D12_DESCRIPTOR_RANGE_OFFSET_APPEND },
					{ D3D12_DESCRIPTOR_RANGE_TYPE_UAV,     BGFX_CONFIG_MAX_TEXTURE_SAMPLERS, 0, 0, D3D12_DESCRIPTOR_RANGE_OFFSET_APPEND },
				};
				BX_STATIC_ASSERT(BX_COUNTOF(descRange) == Rdt::Count);

				D3D12_ROOT_PARAMETER rootParameter[] =
				{
					{ D3D12_ROOT_PARAMETER_TYPE_DESCRIPTOR_TABLE, { 1, &descRange[Rdt::Sampler] }, D3D12_SHADER_VISIBILITY_ALL },
					{ D3D12_ROOT_PARAMETER_TYPE_DESCRIPTOR_TABLE, { 1, &descRange[Rdt::SRV]     }, D3D12_SHADER_VISIBILITY_ALL },
					{ D3D12_ROOT_PARAMETER_TYPE_CBV,              { 0, 0                        }, D3D12_SHADER_VISIBILITY_ALL },
					{ D3D12_ROOT_PARAMETER_TYPE_DESCRIPTOR_TABLE, { 1, &descRange[Rdt::UAV]     }, D3D12_SHADER_VISIBILITY_ALL },
				};
				rootParameter[Rdt::CBV].Descriptor.RegisterSpace  = 0;
				rootParameter[Rdt::CBV].Descriptor.ShaderRegister = 0;

				D3D12_ROOT_SIGNATURE_DESC descRootSignature;
				descRootSignature.NumParameters = BX_COUNTOF(rootParameter);
				descRootSignature.pParameters   = rootParameter;
				descRootSignature.NumStaticSamplers = 0;
				descRootSignature.pStaticSamplers   = NULL;
				descRootSignature.Flags = D3D12_ROOT_SIGNATURE_FLAG_ALLOW_INPUT_ASSEMBLER_INPUT_LAYOUT;

				ID3DBlob* outBlob;
				ID3DBlob* errorBlob;
				DX_CHECK(D3D12SerializeRootSignature(&descRootSignature
						, D3D_ROOT_SIGNATURE_VERSION_1
						, &outBlob
						, &errorBlob
						) );

				DX_CHECK(m_device->CreateRootSignature(0
						, outBlob->GetBufferPointer()
						, outBlob->GetBufferSize()
						, __uuidof(ID3D12RootSignature)
						, (void**)&m_rootSignature
						) );

				D3D12_INDIRECT_ARGUMENT_DESC drawArgDesc[] =
				{
//					{ D3D12_INDIRECT_ARGUMENT_TYPE_SHADER_RESOURCE_VIEW, { Rdt::SRV } },
					{ D3D12_INDIRECT_ARGUMENT_TYPE_CONSTANT_BUFFER_VIEW, { Rdt::CBV } },
					{ D3D12_INDIRECT_ARGUMENT_TYPE_VERTEX_BUFFER_VIEW,   0            },
					{ D3D12_INDIRECT_ARGUMENT_TYPE_DRAW,                 0            },
				};

				D3D12_COMMAND_SIGNATURE_DESC drawCommandSignature =
				{
					sizeof(DrawIndirectCommand),
					BX_COUNTOF(drawArgDesc),
					drawArgDesc,
					1,
				};

				DX_CHECK(m_device->CreateCommandSignature(&drawCommandSignature
						, m_rootSignature
						, __uuidof(ID3D12CommandSignature)
						, (void**)&m_commandSignature[0]
						) );

				D3D12_INDIRECT_ARGUMENT_DESC drawIndexedArgDesc[] =
				{
//					{ D3D12_INDIRECT_ARGUMENT_TYPE_SHADER_RESOURCE_VIEW, { Rdt::SRV } },
					{ D3D12_INDIRECT_ARGUMENT_TYPE_CONSTANT_BUFFER_VIEW, { Rdt::CBV } },
					{ D3D12_INDIRECT_ARGUMENT_TYPE_VERTEX_BUFFER_VIEW,   0            },
					{ D3D12_INDIRECT_ARGUMENT_TYPE_INDEX_BUFFER_VIEW,    0            },
					{ D3D12_INDIRECT_ARGUMENT_TYPE_DRAW_INDEXED,         0            },
				};

				D3D12_COMMAND_SIGNATURE_DESC drawIndexedCommandSignature =
				{
					sizeof(DrawIndexedIndirectCommand),
					BX_COUNTOF(drawIndexedArgDesc),
					drawIndexedArgDesc,
					1,
				};

				DX_CHECK(m_device->CreateCommandSignature(&drawIndexedCommandSignature
						, m_rootSignature
						, __uuidof(ID3D12CommandSignature)
						, (void**)&m_commandSignature[1]
						) );

				UniformHandle handle = BGFX_INVALID_HANDLE;
				for (uint32_t ii = 0; ii < PredefinedUniform::Count; ++ii)
				{
					m_uniformReg.add(handle, getPredefinedUniformName(PredefinedUniform::Enum(ii) ), &m_predefinedUniforms[ii]);
				}

				g_caps.supported |= ( 0
									| BGFX_CAPS_TEXTURE_3D
									| BGFX_CAPS_TEXTURE_COMPARE_ALL
									| BGFX_CAPS_INSTANCING
									| BGFX_CAPS_VERTEX_ATTRIB_HALF
									| BGFX_CAPS_VERTEX_ATTRIB_UINT10
									| BGFX_CAPS_FRAGMENT_DEPTH
									| BGFX_CAPS_BLEND_INDEPENDENT
									| BGFX_CAPS_COMPUTE
									| BGFX_CAPS_FRAGMENT_ORDERING
	//								| BGFX_CAPS_SWAP_CHAIN
									);
				g_caps.maxTextureSize   = 16384;
				g_caps.maxFBAttachments = bx::uint32_min(16, BGFX_CONFIG_MAX_FRAME_BUFFER_ATTACHMENTS);

				for (uint32_t ii = 0; ii < TextureFormat::Count; ++ii)
				{
					uint8_t support = BGFX_CAPS_FORMAT_TEXTURE_NONE;

					const DXGI_FORMAT fmt = isDepth(TextureFormat::Enum(ii) )
						? s_textureFormat[ii].m_fmtDsv
						: s_textureFormat[ii].m_fmt
						;
					const DXGI_FORMAT fmtSrgb = s_textureFormat[ii].m_fmtSrgb;

					if (DXGI_FORMAT_UNKNOWN != fmt)
					{
						D3D12_FEATURE_DATA_FORMAT_SUPPORT data;
						data.Format = fmt;
						hr = m_device->CheckFeatureSupport(D3D12_FEATURE_FORMAT_SUPPORT, &data, sizeof(data) );
						if (SUCCEEDED(hr) )
						{
							support |= 0 != (data.Support1 & (0
									| D3D12_FORMAT_SUPPORT1_TEXTURE2D
									| D3D12_FORMAT_SUPPORT1_TEXTURE3D
									| D3D12_FORMAT_SUPPORT1_TEXTURECUBE
									) )
									? BGFX_CAPS_FORMAT_TEXTURE_COLOR
									: BGFX_CAPS_FORMAT_TEXTURE_NONE
									;

							support |= 0 != (data.Support1 & (0
									| D3D12_FORMAT_SUPPORT1_BUFFER
									| D3D12_FORMAT_SUPPORT1_IA_VERTEX_BUFFER
									| D3D12_FORMAT_SUPPORT1_IA_INDEX_BUFFER
									) )
									? BGFX_CAPS_FORMAT_TEXTURE_VERTEX
									: BGFX_CAPS_FORMAT_TEXTURE_NONE
									;

							support |= 0 != (data.Support1 & (0
									| D3D12_FORMAT_SUPPORT1_SHADER_LOAD
									) )
									? BGFX_CAPS_FORMAT_TEXTURE_IMAGE
									: BGFX_CAPS_FORMAT_TEXTURE_NONE
									;

							support |= 0 != (data.Support1 & (0
									| D3D12_FORMAT_SUPPORT1_RENDER_TARGET
									| D3D12_FORMAT_SUPPORT1_DEPTH_STENCIL
									) )
									? BGFX_CAPS_FORMAT_TEXTURE_FRAMEBUFFER
									: BGFX_CAPS_FORMAT_TEXTURE_NONE
									;
						}
						else
						{
							BX_TRACE("CheckFeatureSupport failed with %x for format %s.", hr, getName(TextureFormat::Enum(ii) ) );
						}

						if (0 != (support & BGFX_CAPS_FORMAT_TEXTURE_IMAGE) )
						{
							// clear image flag for additional testing
							support &= ~BGFX_CAPS_FORMAT_TEXTURE_IMAGE;

							data.Format = s_textureFormat[ii].m_fmt;
							hr = m_device->CheckFeatureSupport(D3D12_FEATURE_FORMAT_SUPPORT, &data, sizeof(data) );
							if (SUCCEEDED(hr) )
							{
								support |= 0 != (data.Support2 & (0
										| D3D12_FORMAT_SUPPORT2_UAV_TYPED_LOAD
										| D3D12_FORMAT_SUPPORT2_UAV_TYPED_STORE
										) )
										? BGFX_CAPS_FORMAT_TEXTURE_IMAGE
										: BGFX_CAPS_FORMAT_TEXTURE_NONE
										;
							}
						}
					}

					if (DXGI_FORMAT_UNKNOWN != fmtSrgb)
					{
						struct D3D11_FEATURE_DATA_FORMAT_SUPPORT
						{
							DXGI_FORMAT InFormat;
							UINT OutFormatSupport;
						};

						D3D12_FEATURE_DATA_FORMAT_SUPPORT data;
						data.Format = fmtSrgb;
						hr = m_device->CheckFeatureSupport(D3D12_FEATURE_FORMAT_SUPPORT, &data, sizeof(data) );
						if (SUCCEEDED(hr) )
						{
							support |= 0 != (data.Support1 & (0
									| D3D12_FORMAT_SUPPORT1_TEXTURE2D
									| D3D12_FORMAT_SUPPORT1_TEXTURE3D
									| D3D12_FORMAT_SUPPORT1_TEXTURECUBE
									) )
									? BGFX_CAPS_FORMAT_TEXTURE_COLOR_SRGB
									: BGFX_CAPS_FORMAT_TEXTURE_NONE
									;
						}
						else
						{
							BX_TRACE("CheckFeatureSupport failed with %x for sRGB format %s.", hr, getName(TextureFormat::Enum(ii) ) );
						}
					}

					g_caps.formats[ii] = support;
				}

				postReset();
			}
			return true;

		error:
			switch (errorState)
			{
			default:
			case 4:
				m_cmd.shutdown();
				DX_RELEASE(m_device, 0);
			case 3:
				DX_RELEASE(m_factory, 0);
#if USE_D3D12_DYNAMIC_LIB
			case 2:
				bx::dlclose(m_dxgidll);
			case 1:
				bx::dlclose(m_d3d12dll);
#endif // USE_D3D12_DYNAMIC_LIB
			case 0:
				break;
			}

			return false;
		}

		void shutdown()
		{
			preReset();

			m_samplerAllocator.destroy();

			for (uint32_t ii = 0; ii < BX_COUNTOF(m_scratchBuffer); ++ii)
			{
				m_scratchBuffer[ii].destroy();
			}

			m_pipelineStateCache.invalidate();

			for (uint32_t ii = 0; ii < BX_COUNTOF(m_indexBuffers); ++ii)
			{
				m_indexBuffers[ii].destroy();
			}

			for (uint32_t ii = 0; ii < BX_COUNTOF(m_vertexBuffers); ++ii)
			{
				m_vertexBuffers[ii].destroy();
			}

			for (uint32_t ii = 0; ii < BX_COUNTOF(m_shaders); ++ii)
			{
				m_shaders[ii].destroy();
			}

			for (uint32_t ii = 0; ii < BX_COUNTOF(m_textures); ++ii)
			{
				m_textures[ii].destroy();
			}

			DX_RELEASE(m_rtvDescriptorHeap, 0);
			DX_RELEASE(m_dsvDescriptorHeap, 0);

			DX_RELEASE(m_commandSignature[0], 0);
			DX_RELEASE(m_commandSignature[1], 0);
			DX_RELEASE(m_rootSignature, 0);

			DX_RELEASE(m_swapChain, 0);

			m_cmd.shutdown();

			DX_RELEASE(m_device, 0);
			DX_RELEASE(m_factory, 0);

#if USE_D3D12_DYNAMIC_LIB
			bx::dlclose(m_d3d12dll);
			bx::dlclose(m_dxgidll);
#endif // USE_D3D12_DYNAMIC_LIB
		}

		RendererType::Enum getRendererType() const BX_OVERRIDE
		{
			return RendererType::Direct3D12;
		}

		const char* getRendererName() const BX_OVERRIDE
		{
			return BGFX_RENDERER_DIRECT3D12_NAME;
		}

		static bool isLost(HRESULT _hr)
		{
			return DXGI_ERROR_DEVICE_REMOVED == _hr
				|| DXGI_ERROR_DEVICE_HUNG == _hr
				|| DXGI_ERROR_DEVICE_RESET == _hr
				|| DXGI_ERROR_DRIVER_INTERNAL_ERROR == _hr
				|| DXGI_ERROR_NOT_CURRENTLY_AVAILABLE == _hr
				;
		}

		void flip(HMD& /*_hmd*/) BX_OVERRIDE
		{
			if (NULL != m_swapChain)
			{
				int64_t start = bx::getHPCounter();

				HRESULT hr = 0;
				uint32_t syncInterval = !!(m_flags & BGFX_RESET_VSYNC);
				for (uint32_t ii = 1, num = m_numWindows; ii < num && SUCCEEDED(hr); ++ii)
				{
					hr = m_frameBuffers[m_windows[ii].idx].m_swapChain->Present(syncInterval, 0);
				}

				if (SUCCEEDED(hr) )
				{
					m_cmd.finish(m_backBufferColorFence[(m_backBufferColorIdx-1) % m_scd.BufferCount]);
					hr = m_swapChain->Present(syncInterval, 0);
				}

				int64_t now = bx::getHPCounter();
				m_presentElapsed = now - start;

				if (FAILED(hr)
				&&  isLost(hr) )
				{
					++m_lost;
					BGFX_FATAL(10 > m_lost, bgfx::Fatal::DeviceLost, "Device is lost. FAILED 0x%08x", hr);
				}
				else
				{
					m_lost = 0;
				}
			}
		}

		void createIndexBuffer(IndexBufferHandle _handle, Memory* _mem, uint16_t _flags) BX_OVERRIDE
		{
			m_indexBuffers[_handle.idx].create(_mem->size, _mem->data, _flags, false);
		}

		void destroyIndexBuffer(IndexBufferHandle _handle) BX_OVERRIDE
		{
			m_indexBuffers[_handle.idx].destroy();
		}

		void createVertexDecl(VertexDeclHandle _handle, const VertexDecl& _decl) BX_OVERRIDE
		{
			VertexDecl& decl = m_vertexDecls[_handle.idx];
			memcpy(&decl, &_decl, sizeof(VertexDecl) );
			dump(decl);
		}

		void destroyVertexDecl(VertexDeclHandle /*_handle*/) BX_OVERRIDE
		{
		}

		void createVertexBuffer(VertexBufferHandle _handle, Memory* _mem, VertexDeclHandle _declHandle, uint16_t _flags) BX_OVERRIDE
		{
			m_vertexBuffers[_handle.idx].create(_mem->size, _mem->data, _declHandle, _flags);
		}

		void destroyVertexBuffer(VertexBufferHandle _handle) BX_OVERRIDE
		{
			m_vertexBuffers[_handle.idx].destroy();
		}

		void createDynamicIndexBuffer(IndexBufferHandle _handle, uint32_t _size, uint16_t _flags) BX_OVERRIDE
		{
			m_indexBuffers[_handle.idx].create(_size, NULL, _flags, false);
		}

		void updateDynamicIndexBuffer(IndexBufferHandle _handle, uint32_t _offset, uint32_t _size, Memory* _mem) BX_OVERRIDE
		{
			m_indexBuffers[_handle.idx].update(m_commandList, _offset, bx::uint32_min(_size, _mem->size), _mem->data);
		}

		void destroyDynamicIndexBuffer(IndexBufferHandle _handle) BX_OVERRIDE
		{
			m_indexBuffers[_handle.idx].destroy();
		}

		void createDynamicVertexBuffer(VertexBufferHandle _handle, uint32_t _size, uint16_t _flags) BX_OVERRIDE
		{
			VertexDeclHandle decl = BGFX_INVALID_HANDLE;
			m_vertexBuffers[_handle.idx].create(_size, NULL, decl, _flags);
		}

		void updateDynamicVertexBuffer(VertexBufferHandle _handle, uint32_t _offset, uint32_t _size, Memory* _mem) BX_OVERRIDE
		{
			m_vertexBuffers[_handle.idx].update(m_commandList, _offset, bx::uint32_min(_size, _mem->size), _mem->data);
		}

		void destroyDynamicVertexBuffer(VertexBufferHandle _handle) BX_OVERRIDE
		{
			m_vertexBuffers[_handle.idx].destroy();
		}

		void createShader(ShaderHandle _handle, Memory* _mem) BX_OVERRIDE
		{
			m_shaders[_handle.idx].create(_mem);
		}

		void destroyShader(ShaderHandle _handle) BX_OVERRIDE
		{
			m_shaders[_handle.idx].destroy();
		}

		void createProgram(ProgramHandle _handle, ShaderHandle _vsh, ShaderHandle _fsh) BX_OVERRIDE
		{
			m_program[_handle.idx].create(&m_shaders[_vsh.idx], isValid(_fsh) ? &m_shaders[_fsh.idx] : NULL);
		}

		void destroyProgram(ProgramHandle _handle) BX_OVERRIDE
		{
			m_program[_handle.idx].destroy();
		}

		void createTexture(TextureHandle _handle, Memory* _mem, uint32_t _flags, uint8_t _skip) BX_OVERRIDE
		{
			m_textures[_handle.idx].create(_mem, _flags, _skip);
		}

		void updateTextureBegin(TextureHandle /*_handle*/, uint8_t /*_side*/, uint8_t /*_mip*/) BX_OVERRIDE
		{
		}

		void updateTexture(TextureHandle _handle, uint8_t _side, uint8_t _mip, const Rect& _rect, uint16_t _z, uint16_t _depth, uint16_t _pitch, const Memory* _mem) BX_OVERRIDE
		{
			m_textures[_handle.idx].update(m_commandList, _side, _mip, _rect, _z, _depth, _pitch, _mem);
		}

		void updateTextureEnd() BX_OVERRIDE
		{
		}

		void resizeTexture(TextureHandle _handle, uint16_t _width, uint16_t _height) BX_OVERRIDE
		{
			TextureD3D12& texture = m_textures[_handle.idx];

			uint32_t size = sizeof(uint32_t) + sizeof(TextureCreate);
			const Memory* mem = alloc(size);

			bx::StaticMemoryBlockWriter writer(mem->data, mem->size);
			uint32_t magic = BGFX_CHUNK_MAGIC_TEX;
			bx::write(&writer, magic);

			TextureCreate tc;
			tc.m_flags   = texture.m_flags;
			tc.m_width   = _width;
			tc.m_height  = _height;
			tc.m_sides   = 0;
			tc.m_depth   = 0;
			tc.m_numMips = 1;
			tc.m_format  = texture.m_requestedFormat;
			tc.m_cubeMap = false;
			tc.m_mem     = NULL;
			bx::write(&writer, tc);

			texture.destroy();
			texture.create(mem, tc.m_flags, 0);

			release(mem);
		}

		void destroyTexture(TextureHandle _handle) BX_OVERRIDE
		{
			m_textures[_handle.idx].destroy();
		}

		void createFrameBuffer(FrameBufferHandle _handle, uint8_t _num, const TextureHandle* _textureHandles) BX_OVERRIDE
		{
			m_frameBuffers[_handle.idx].create(_num, _textureHandles);
		}

		void createFrameBuffer(FrameBufferHandle _handle, void* _nwh, uint32_t _width, uint32_t _height, TextureFormat::Enum _depthFormat) BX_OVERRIDE
		{
			uint16_t denseIdx = m_numWindows++;
			m_windows[denseIdx] = _handle;
			m_frameBuffers[_handle.idx].create(denseIdx, _nwh, _width, _height, _depthFormat);
		}

		void destroyFrameBuffer(FrameBufferHandle _handle) BX_OVERRIDE
		{
			uint16_t denseIdx = m_frameBuffers[_handle.idx].destroy();
			if (UINT16_MAX != denseIdx)
			{
				--m_numWindows;
				if (m_numWindows > 1)
				{
					FrameBufferHandle handle = m_windows[m_numWindows];
					m_windows[denseIdx] = handle;
					m_frameBuffers[handle.idx].m_denseIdx = denseIdx;
				}
			}
		}

		void createUniform(UniformHandle _handle, UniformType::Enum _type, uint16_t _num, const char* _name) BX_OVERRIDE
		{
			if (NULL != m_uniforms[_handle.idx])
			{
				BX_FREE(g_allocator, m_uniforms[_handle.idx]);
			}

			uint32_t size = BX_ALIGN_16(g_uniformTypeSize[_type] * _num);
			void* data = BX_ALLOC(g_allocator, size);
			memset(data, 0, size);
			m_uniforms[_handle.idx] = data;
			m_uniformReg.add(_handle, _name, data);
		}

		void destroyUniform(UniformHandle _handle) BX_OVERRIDE
		{
			BX_FREE(g_allocator, m_uniforms[_handle.idx]);
			m_uniforms[_handle.idx] = NULL;
		}

		void saveScreenShot(const char* _filePath) BX_OVERRIDE
		{
			uint32_t idx = (m_backBufferColorIdx-1) % m_scd.BufferCount;
			m_cmd.finish(m_backBufferColorFence[idx]);
			ID3D12Resource* backBuffer = m_backBufferColor[idx];

			D3D12_RESOURCE_DESC desc = backBuffer->GetDesc();

			const uint32_t width  = (uint32_t)desc.Width;
			const uint32_t height = (uint32_t)desc.Height;

			D3D12_PLACED_SUBRESOURCE_FOOTPRINT layout;
			uint32_t numRows;
			uint64_t total;
			uint64_t pitch;
			m_device->GetCopyableFootprints(&desc
				, 0
				, 1
				, 0
				, &layout
				, &numRows
				, &pitch
				, &total
				);

			ID3D12Resource* readback = createCommittedResource(m_device, HeapProperty::ReadBack, total);

			D3D12_BOX box;
			box.left   = 0;
			box.top    = 0;
			box.right  = width;
			box.bottom = height;
			box.front  = 0;
			box.back   = 1;

			setResourceBarrier(m_commandList, backBuffer, D3D12_RESOURCE_STATE_PRESENT, D3D12_RESOURCE_STATE_COPY_SOURCE);
			D3D12_TEXTURE_COPY_LOCATION dst = { readback,   D3D12_TEXTURE_COPY_TYPE_PLACED_FOOTPRINT,  layout };
			D3D12_TEXTURE_COPY_LOCATION src = { backBuffer, D3D12_TEXTURE_COPY_TYPE_SUBRESOURCE_INDEX, { 0 }  };
			m_commandList->CopyTextureRegion(&dst, 0, 0, 0, &src, &box);
			setResourceBarrier(m_commandList, backBuffer, D3D12_RESOURCE_STATE_COPY_SOURCE, D3D12_RESOURCE_STATE_PRESENT);
			finish();
			m_commandList = m_cmd.alloc();

			void* data;
			readback->Map(0, NULL, (void**)&data);
			imageSwizzleBgra8(width
				, height
				, (uint32_t)pitch
				, data
				, data
				);
			g_callback->screenShot(_filePath
				, width
				, height
				, (uint32_t)pitch
				, data
				, (uint32_t)total
				, false
				);
			readback->Unmap(0, NULL);

			DX_RELEASE(readback, 0);
		}

		void updateViewName(uint8_t /*_id*/, const char* /*_name*/) BX_OVERRIDE
		{
		}

		void updateUniform(uint16_t _loc, const void* _data, uint32_t _size) BX_OVERRIDE
		{
			memcpy(m_uniforms[_loc], _data, _size);
		}

		void setMarker(const char* /*_marker*/, uint32_t /*_size*/) BX_OVERRIDE
		{
		}

		void submit(Frame* _render, ClearQuad& _clearQuad, TextVideoMemBlitter& _textVideoMemBlitter) BX_OVERRIDE;

		void blitSetup(TextVideoMemBlitter& _blitter) BX_OVERRIDE
		{
			const uint32_t width  = m_scd.BufferDesc.Width;
			const uint32_t height = m_scd.BufferDesc.Height;

			FrameBufferHandle fbh = BGFX_INVALID_HANDLE;
			setFrameBuffer(fbh, false);

			D3D12_VIEWPORT vp;
			vp.TopLeftX = 0;
			vp.TopLeftY = 0;
			vp.Width    = (float)width;
			vp.Height   = (float)height;
			vp.MinDepth = 0.0f;
			vp.MaxDepth = 1.0f;
			m_commandList->RSSetViewports(1, &vp);

			const uint64_t state = 0
				| BGFX_STATE_RGB_WRITE
				| BGFX_STATE_ALPHA_WRITE
				| BGFX_STATE_DEPTH_TEST_ALWAYS
				;

			m_currentProgram = &m_program[0];
			ID3D12PipelineState* pso = getPipelineState(state
				, packStencil(BGFX_STENCIL_DEFAULT, BGFX_STENCIL_DEFAULT)
				, _blitter.m_vb->decl.idx
				, _blitter.m_program.idx
				, 0
				);
			m_commandList->SetPipelineState(pso);
			m_commandList->SetGraphicsRootSignature(m_rootSignature);

			float proj[16];
			bx::mtxOrtho(proj, 0.0f, (float)width, (float)height, 0.0f, 0.0f, 1000.0f);

			PredefinedUniform& predefined = m_program[_blitter.m_program.idx].m_predefined[0];
			uint8_t flags = predefined.m_type;
			setShaderUniform(flags, predefined.m_loc, proj, 4);

			D3D12_GPU_VIRTUAL_ADDRESS gpuAddress;
			commitShaderConstants(gpuAddress);

			ScratchBufferD3D12& scratchBuffer = m_scratchBuffer[m_backBufferColorIdx];
			ID3D12DescriptorHeap* heaps[] =
			{
				m_samplerAllocator.getHeap(),
				scratchBuffer.getHeap(),
			};
			m_commandList->SetDescriptorHeaps(BX_COUNTOF(heaps), heaps);
			m_commandList->SetGraphicsRootConstantBufferView(Rdt::CBV, gpuAddress);

			TextureD3D12& texture = m_textures[_blitter.m_texture.idx];
			uint32_t samplerFlags[BGFX_CONFIG_MAX_TEXTURE_SAMPLERS] = { texture.m_flags & BGFX_TEXTURE_SAMPLER_BITS_MASK };
			uint16_t samplerStateIdx = getSamplerState(samplerFlags);
			m_commandList->SetGraphicsRootDescriptorTable(Rdt::Sampler, m_samplerAllocator.get(samplerStateIdx) );
			D3D12_GPU_DESCRIPTOR_HANDLE srvHandle;
			scratchBuffer.alloc(srvHandle, texture);
			m_commandList->SetGraphicsRootDescriptorTable(Rdt::SRV, srvHandle);

			VertexBufferD3D12& vb  = m_vertexBuffers[_blitter.m_vb->handle.idx];
			const VertexDecl& vertexDecl = m_vertexDecls[_blitter.m_vb->decl.idx];
			D3D12_VERTEX_BUFFER_VIEW viewDesc;
			viewDesc.BufferLocation = vb.m_gpuVA;
			viewDesc.StrideInBytes  = vertexDecl.m_stride;
			viewDesc.SizeInBytes    = vb.m_size;
			m_commandList->IASetVertexBuffers(0, 1, &viewDesc);

			const BufferD3D12& ib = m_indexBuffers[_blitter.m_ib->handle.idx];
			D3D12_INDEX_BUFFER_VIEW ibv;
			ibv.Format         = DXGI_FORMAT_R16_UINT;
			ibv.BufferLocation = ib.m_gpuVA;
			ibv.SizeInBytes    = ib.m_size;
			m_commandList->IASetIndexBuffer(&ibv);

			m_commandList->IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
		}

		void blitRender(TextVideoMemBlitter& _blitter, uint32_t _numIndices) BX_OVERRIDE
		{
			const uint32_t numVertices = _numIndices*4/6;
			if (0 < numVertices)
			{
				m_indexBuffers [_blitter.m_ib->handle.idx].update(m_commandList, 0, _numIndices*2, _blitter.m_ib->data);
				m_vertexBuffers[_blitter.m_vb->handle.idx].update(m_commandList, 0, numVertices*_blitter.m_decl.m_stride, _blitter.m_vb->data, true);

				m_commandList->DrawIndexedInstanced(_numIndices
					, 1
					, 0
					, 0
					, 0
					);
			}
		}

		void preReset()
		{
			finishAll();

			for (uint32_t ii = 0, num = m_scd.BufferCount; ii < num; ++ii)
			{
				DX_RELEASE(m_backBufferColor[ii], num-1-ii);
			}
			DX_RELEASE(m_backBufferDepthStencil, 0);

			for (uint32_t ii = 0; ii < BX_COUNTOF(m_frameBuffers); ++ii)
			{
				m_frameBuffers[ii].preReset();
			}

			invalidateCache();

//			capturePreReset();
		}

		void postReset()
		{
			memset(m_backBufferColorFence, 0, sizeof(m_backBufferColorFence) );

			uint32_t rtvDescriptorSize = m_device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_RTV);

			for (uint32_t ii = 0, num = m_scd.BufferCount; ii < num; ++ii)
			{
				D3D12_CPU_DESCRIPTOR_HANDLE handle = m_rtvDescriptorHeap->GetCPUDescriptorHandleForHeapStart();
				handle.ptr += ii * rtvDescriptorSize;
				DX_CHECK(m_swapChain->GetBuffer(ii
						, __uuidof(ID3D12Resource)
						, (void**)&m_backBufferColor[ii]
						) );
				m_device->CreateRenderTargetView(m_backBufferColor[ii], NULL, handle);
			}

			D3D12_RESOURCE_DESC resourceDesc;
			resourceDesc.Dimension = D3D12_RESOURCE_DIMENSION_TEXTURE2D;
			resourceDesc.Alignment = 0;
			resourceDesc.Width     = bx::uint32_max(m_resolution.m_width,  1);
			resourceDesc.Height    = bx::uint32_max(m_resolution.m_height, 1);
			resourceDesc.DepthOrArraySize   = 1;
			resourceDesc.MipLevels          = 0;
			resourceDesc.Format             = DXGI_FORMAT_D24_UNORM_S8_UINT;
			resourceDesc.SampleDesc.Count   = 1;
			resourceDesc.SampleDesc.Quality = 0;
			resourceDesc.Layout = D3D12_TEXTURE_LAYOUT_UNKNOWN;
			resourceDesc.Flags  = D3D12_RESOURCE_FLAG_ALLOW_DEPTH_STENCIL;

			D3D12_CLEAR_VALUE clearValue;
			clearValue.Format = resourceDesc.Format;
			clearValue.DepthStencil.Depth   = 1.0f;
			clearValue.DepthStencil.Stencil = 0;

			m_backBufferDepthStencil = createCommittedResource(m_device, HeapProperty::Default, &resourceDesc, &clearValue);

			D3D12_DEPTH_STENCIL_VIEW_DESC dsvDesc;
			ZeroMemory(&dsvDesc, sizeof(dsvDesc) );
			dsvDesc.Format        = resourceDesc.Format;
			dsvDesc.ViewDimension = D3D12_DSV_DIMENSION_TEXTURE2D;
			dsvDesc.Flags         = D3D12_DSV_FLAGS(0)
// 				| D3D12_DSV_FLAG_READ_ONLY_DEPTH
// 				| D3D12_DSV_FLAG_READ_ONLY_DEPTH
				;

			m_device->CreateDepthStencilView(m_backBufferDepthStencil
				, &dsvDesc
				, m_dsvDescriptorHeap->GetCPUDescriptorHandleForHeapStart()
				);

			for (uint32_t ii = 0; ii < BX_COUNTOF(m_frameBuffers); ++ii)
			{
				m_frameBuffers[ii].postReset();
			}

			m_commandList = m_cmd.alloc();
//			capturePostReset();
		}

		void invalidateCache()
		{
			m_pipelineStateCache.invalidate();

			m_samplerStateCache.invalidate();
			m_samplerAllocator.reset();
		}

		void updateMsaa()
		{
			for (uint32_t ii = 1, last = 0; ii < BX_COUNTOF(s_msaa); ++ii)
			{
				uint32_t msaa = s_checkMsaa[ii];

				D3D12_FEATURE_DATA_MULTISAMPLE_QUALITY_LEVELS data;
				memset(&data, 0, sizeof(msaa) );
				data.Format = m_scd.BufferDesc.Format;
				data.SampleCount = msaa;
				data.Flags = D3D12_MULTISAMPLE_QUALITY_LEVELS_FLAG_NONE;
				HRESULT hr = m_device->CheckFeatureSupport(D3D12_FEATURE_MULTISAMPLE_QUALITY_LEVELS, &data, sizeof(data) );

data.NumQualityLevels = 0;

				if (SUCCEEDED(hr)
				&&  0 < data.NumQualityLevels)
				{
					s_msaa[ii].Count   = data.SampleCount;
					s_msaa[ii].Quality = data.NumQualityLevels - 1;
					last = ii;
				}
				else
				{
					s_msaa[ii] = s_msaa[last];
				}
			}
		}

		void updateResolution(const Resolution& _resolution)
		{
			if ( (uint32_t)m_scd.BufferDesc.Width != _resolution.m_width
			||   (uint32_t)m_scd.BufferDesc.Height != _resolution.m_height
			||   m_flags != _resolution.m_flags)
			{
				bool resize = (m_flags&BGFX_RESET_MSAA_MASK) == (_resolution.m_flags&BGFX_RESET_MSAA_MASK);
				m_flags = _resolution.m_flags;

				m_textVideoMem.resize(false, _resolution.m_width, _resolution.m_height);
				m_textVideoMem.clear();

				m_resolution = _resolution;
				m_scd.BufferDesc.Width  = _resolution.m_width;
				m_scd.BufferDesc.Height = _resolution.m_height;

				preReset();

				if (resize)
				{
					uint32_t nodeMask[] = { 1, 1, 1, 1 };
					BX_STATIC_ASSERT(BX_COUNTOF(m_backBufferColor) == BX_COUNTOF(nodeMask) );
					IUnknown* presentQueue[] ={ m_cmd.m_commandQueue, m_cmd.m_commandQueue, m_cmd.m_commandQueue, m_cmd.m_commandQueue };
					BX_STATIC_ASSERT(BX_COUNTOF(m_backBufferColor) == BX_COUNTOF(presentQueue) );

					DX_CHECK(m_swapChain->ResizeBuffers1(m_scd.BufferCount
							, m_scd.BufferDesc.Width
							, m_scd.BufferDesc.Height
							, m_scd.BufferDesc.Format
							, m_scd.Flags
							, nodeMask
							, presentQueue
							) );
				}
				else
				{
					updateMsaa();
					m_scd.SampleDesc = s_msaa[(m_flags&BGFX_RESET_MSAA_MASK)>>BGFX_RESET_MSAA_SHIFT];

					DX_RELEASE(m_swapChain, 0);

					HRESULT hr;
					hr = m_factory->CreateSwapChain(m_cmd.m_commandQueue
							, &m_scd
							, reinterpret_cast<IDXGISwapChain**>(&m_swapChain)
							);
					BGFX_FATAL(SUCCEEDED(hr), bgfx::Fatal::UnableToInitialize, "Failed to create swap chain.");
				}

				postReset();
			}
		}

		void setShaderUniform(uint8_t _flags, uint16_t _regIndex, const void* _val, uint16_t _numRegs)
		{
			if (_flags&BGFX_UNIFORM_FRAGMENTBIT)
			{
				memcpy(&m_fsScratch[_regIndex], _val, _numRegs*16);
				m_fsChanges += _numRegs;
			}
			else
			{
				memcpy(&m_vsScratch[_regIndex], _val, _numRegs*16);
				m_vsChanges += _numRegs;
			}
		}

		void setShaderUniform4f(uint8_t _flags, uint16_t _regIndex, const void* _val, uint16_t _numRegs)
		{
			setShaderUniform(_flags, _regIndex, _val, _numRegs);
		}

		void setShaderUniform4x4f(uint8_t _flags, uint16_t _regIndex, const void* _val, uint16_t _numRegs)
		{
			setShaderUniform(_flags, _regIndex, _val, _numRegs);
		}

		void commitShaderConstants(D3D12_GPU_VIRTUAL_ADDRESS& _gpuAddress)
		{
			uint32_t total = bx::strideAlign(0
				+ m_currentProgram->m_vsh->m_size
				+ (NULL != m_currentProgram->m_fsh ? m_currentProgram->m_fsh->m_size : 0)
				, D3D12_CONSTANT_BUFFER_DATA_PLACEMENT_ALIGNMENT
				);
			uint8_t* data = (uint8_t*)m_scratchBuffer[m_backBufferColorIdx].alloc(_gpuAddress, total);

			{
				uint32_t size = m_currentProgram->m_vsh->m_size;
				memcpy(data, m_vsScratch, size);
				data += size;

				m_vsChanges = 0;
			}

			if (NULL != m_currentProgram->m_fsh)
			{
				memcpy(data, m_fsScratch, m_currentProgram->m_fsh->m_size);

				m_fsChanges = 0;
			}
		}

		void setFrameBuffer(FrameBufferHandle _fbh, bool _msaa = true)
		{
			if (isValid(m_fbh)
			&&  m_fbh.idx != _fbh.idx)
			{
				const FrameBufferD3D12& frameBuffer = m_frameBuffers[m_fbh.idx];

				for (uint8_t ii = 0, num = frameBuffer.m_num; ii < num; ++ii)
				{
					TextureD3D12& texture = m_textures[frameBuffer.m_texture[ii].idx];
					texture.setState(m_commandList, D3D12_RESOURCE_STATE_PIXEL_SHADER_RESOURCE);
				}

				if (isValid(frameBuffer.m_depth) )
				{
					TextureD3D12& texture = m_textures[frameBuffer.m_depth.idx];
					const bool bufferOnly = 0 != (texture.m_flags&BGFX_TEXTURE_RT_BUFFER_ONLY);
					if (!bufferOnly)
					{
						texture.setState(m_commandList, D3D12_RESOURCE_STATE_DEPTH_READ);
					}
				}
			}

			if (!isValid(_fbh) )
			{
				m_rtvHandle = m_rtvDescriptorHeap->GetCPUDescriptorHandleForHeapStart();
				uint32_t rtvDescriptorSize = m_device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_RTV);
				m_rtvHandle.ptr += m_backBufferColorIdx * rtvDescriptorSize;
				m_dsvHandle = m_dsvDescriptorHeap->GetCPUDescriptorHandleForHeapStart();

				m_currentColor        = &m_rtvHandle;
				m_currentDepthStencil = &m_dsvHandle;
				m_commandList->OMSetRenderTargets(1, m_currentColor, false, m_currentDepthStencil);
			}
			else
			{
				const FrameBufferD3D12& frameBuffer = m_frameBuffers[_fbh.idx];

				if (0 < frameBuffer.m_num)
				{
					D3D12_CPU_DESCRIPTOR_HANDLE rtvDescriptor = m_rtvDescriptorHeap->GetCPUDescriptorHandleForHeapStart();
					uint32_t rtvDescriptorSize = m_device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_RTV);
					m_rtvHandle.ptr = rtvDescriptor.ptr + (BX_COUNTOF(m_backBufferColor) + _fbh.idx * BGFX_CONFIG_MAX_FRAME_BUFFER_ATTACHMENTS) * rtvDescriptorSize;
					m_currentColor  = &m_rtvHandle;
				}
				else
				{
					m_currentColor = NULL;
				}

				if (isValid(frameBuffer.m_depth) )
				{
					D3D12_CPU_DESCRIPTOR_HANDLE dsvDescriptor = m_dsvDescriptorHeap->GetCPUDescriptorHandleForHeapStart();
					uint32_t dsvDescriptorSize = m_device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_DSV);
					m_dsvHandle.ptr = dsvDescriptor.ptr + (1 + _fbh.idx) * dsvDescriptorSize;
					m_currentDepthStencil = &m_dsvHandle;
				}
				else
				{
					m_currentDepthStencil = NULL;
				}

				for (uint8_t ii = 0, num = frameBuffer.m_num; ii < num; ++ii)
				{
					TextureD3D12& texture = m_textures[frameBuffer.m_texture[ii].idx];
					texture.setState(m_commandList, D3D12_RESOURCE_STATE_RENDER_TARGET);
				}

				if (isValid(frameBuffer.m_depth) )
				{
					TextureD3D12& texture = m_textures[frameBuffer.m_depth.idx];
					texture.setState(m_commandList, D3D12_RESOURCE_STATE_DEPTH_WRITE);
				}

				m_commandList->OMSetRenderTargets(frameBuffer.m_num
												, m_currentColor
												, true //NULL == m_currentDepthStencil
												, m_currentDepthStencil
												);
			}

			m_fbh = _fbh;
			m_rtMsaa = _msaa;
		}

		void setBlendState(D3D12_BLEND_DESC& desc, uint64_t _state, uint32_t _rgba = 0)
		{
			memset(&desc, 0, sizeof(desc) );
			desc.IndependentBlendEnable = !!(BGFX_STATE_BLEND_INDEPENDENT & _state);

			D3D12_RENDER_TARGET_BLEND_DESC* drt = &desc.RenderTarget[0];
			drt->BlendEnable = !!(BGFX_STATE_BLEND_MASK & _state);

			{
				const uint32_t blend    = uint32_t( (_state & BGFX_STATE_BLEND_MASK         ) >> BGFX_STATE_BLEND_SHIFT);
				const uint32_t equation = uint32_t( (_state & BGFX_STATE_BLEND_EQUATION_MASK) >> BGFX_STATE_BLEND_EQUATION_SHIFT);

				const uint32_t srcRGB = (blend      ) & 0xf;
				const uint32_t dstRGB = (blend >>  4) & 0xf;
				const uint32_t srcA   = (blend >>  8) & 0xf;
				const uint32_t dstA   = (blend >> 12) & 0xf;

				const uint32_t equRGB = (equation     ) & 0x7;
				const uint32_t equA   = (equation >> 3) & 0x7;

				drt->SrcBlend       = s_blendFactor[srcRGB][0];
				drt->DestBlend      = s_blendFactor[dstRGB][0];
				drt->BlendOp        = s_blendEquation[equRGB];

				drt->SrcBlendAlpha  = s_blendFactor[srcA][1];
				drt->DestBlendAlpha = s_blendFactor[dstA][1];
				drt->BlendOpAlpha   = s_blendEquation[equA];
			}

			uint32_t writeMask = (_state & BGFX_STATE_ALPHA_WRITE)
					? D3D12_COLOR_WRITE_ENABLE_ALPHA
					: 0
					;
			writeMask |= (_state & BGFX_STATE_RGB_WRITE)
					? D3D12_COLOR_WRITE_ENABLE_RED
					| D3D12_COLOR_WRITE_ENABLE_GREEN
					| D3D12_COLOR_WRITE_ENABLE_BLUE
					: 0
					;

			drt->RenderTargetWriteMask = writeMask;

			if (desc.IndependentBlendEnable)
			{
				for (uint32_t ii = 1, rgba = _rgba; ii < BGFX_CONFIG_MAX_FRAME_BUFFER_ATTACHMENTS; ++ii, rgba >>= 11)
				{
					drt = &desc.RenderTarget[ii];
					drt->BlendEnable = 0 != (rgba & 0x7ff);

					const uint32_t src      = (rgba     ) & 0xf;
					const uint32_t dst      = (rgba >> 4) & 0xf;
					const uint32_t equation = (rgba >> 8) & 0x7;

					drt->SrcBlend       = s_blendFactor[src][0];
					drt->DestBlend      = s_blendFactor[dst][0];
					drt->BlendOp        = s_blendEquation[equation];

					drt->SrcBlendAlpha  = s_blendFactor[src][1];
					drt->DestBlendAlpha = s_blendFactor[dst][1];
					drt->BlendOpAlpha   = s_blendEquation[equation];

					drt->RenderTargetWriteMask = writeMask;
				}
			}
			else
			{
				for (uint32_t ii = 1; ii < BGFX_CONFIG_MAX_FRAME_BUFFER_ATTACHMENTS; ++ii)
				{
					memcpy(&desc.RenderTarget[ii], drt, sizeof(D3D12_RENDER_TARGET_BLEND_DESC) );
				}
			}
		}

		void setRasterizerState(D3D12_RASTERIZER_DESC& desc, uint64_t _state, bool _wireframe = false)
		{
			const uint32_t cull = (_state&BGFX_STATE_CULL_MASK) >> BGFX_STATE_CULL_SHIFT;

			desc.FillMode = _wireframe
				? D3D12_FILL_MODE_WIREFRAME
				: D3D12_FILL_MODE_SOLID
				;
			desc.CullMode = s_cullMode[cull];
			desc.FrontCounterClockwise = false;
			desc.DepthBias = 0;
			desc.DepthBiasClamp = 0.0f;
			desc.SlopeScaledDepthBias = 0.0f;
			desc.DepthClipEnable = false;
			desc.MultisampleEnable = !!(_state&BGFX_STATE_MSAA);
			desc.AntialiasedLineEnable = false;
			desc.ForcedSampleCount = 0;
			desc.ConservativeRaster = D3D12_CONSERVATIVE_RASTERIZATION_MODE_OFF;
		}

		void setDepthStencilState(D3D12_DEPTH_STENCIL_DESC& desc, uint64_t _state, uint64_t _stencil = 0)
		{
			const uint32_t fstencil = unpackStencil(0, _stencil);

			memset(&desc, 0, sizeof(desc) );
			uint32_t func = (_state&BGFX_STATE_DEPTH_TEST_MASK)>>BGFX_STATE_DEPTH_TEST_SHIFT;
			desc.DepthEnable = 0 != func;
			desc.DepthWriteMask = !!(BGFX_STATE_DEPTH_WRITE & _state)
				? D3D12_DEPTH_WRITE_MASK_ALL
				: D3D12_DEPTH_WRITE_MASK_ZERO
				;
			desc.DepthFunc = s_cmpFunc[func];

			uint32_t bstencil = unpackStencil(1, _stencil);
			uint32_t frontAndBack = bstencil != BGFX_STENCIL_NONE && bstencil != fstencil;
			bstencil = frontAndBack ? bstencil : fstencil;

			desc.StencilEnable    = 0 != _stencil;
			desc.StencilReadMask  = (fstencil & BGFX_STENCIL_FUNC_RMASK_MASK) >> BGFX_STENCIL_FUNC_RMASK_SHIFT;
			desc.StencilWriteMask = 0xff;

			desc.FrontFace.StencilFailOp      = s_stencilOp[(fstencil & BGFX_STENCIL_OP_FAIL_S_MASK) >> BGFX_STENCIL_OP_FAIL_S_SHIFT];
			desc.FrontFace.StencilDepthFailOp = s_stencilOp[(fstencil & BGFX_STENCIL_OP_FAIL_Z_MASK) >> BGFX_STENCIL_OP_FAIL_Z_SHIFT];
			desc.FrontFace.StencilPassOp      = s_stencilOp[(fstencil & BGFX_STENCIL_OP_PASS_Z_MASK) >> BGFX_STENCIL_OP_PASS_Z_SHIFT];
			desc.FrontFace.StencilFunc        = s_cmpFunc[(fstencil & BGFX_STENCIL_TEST_MASK) >> BGFX_STENCIL_TEST_SHIFT];

			desc.BackFace.StencilFailOp       = s_stencilOp[(bstencil & BGFX_STENCIL_OP_FAIL_S_MASK) >> BGFX_STENCIL_OP_FAIL_S_SHIFT];
			desc.BackFace.StencilDepthFailOp  = s_stencilOp[(bstencil & BGFX_STENCIL_OP_FAIL_Z_MASK) >> BGFX_STENCIL_OP_FAIL_Z_SHIFT];
			desc.BackFace.StencilPassOp       = s_stencilOp[(bstencil & BGFX_STENCIL_OP_PASS_Z_MASK) >> BGFX_STENCIL_OP_PASS_Z_SHIFT];
			desc.BackFace.StencilFunc         = s_cmpFunc[(bstencil&BGFX_STENCIL_TEST_MASK) >> BGFX_STENCIL_TEST_SHIFT];
		}

		uint32_t setInputLayout(D3D12_INPUT_ELEMENT_DESC* _vertexElements, const VertexDecl& _vertexDecl, const ProgramD3D12& _program, uint8_t _numInstanceData)
		{
			VertexDecl decl;
			memcpy(&decl, &_vertexDecl, sizeof(VertexDecl) );
			const uint16_t* attrMask = _program.m_vsh->m_attrMask;

			for (uint32_t ii = 0; ii < Attrib::Count; ++ii)
			{
				uint16_t mask = attrMask[ii];
				uint16_t attr = (decl.m_attributes[ii] & mask);
				decl.m_attributes[ii] = attr == 0 ? UINT16_MAX : attr == UINT16_MAX ? 0 : attr;
			}

			D3D12_INPUT_ELEMENT_DESC* elem = fillVertexDecl(_vertexElements, decl);
			uint32_t num = uint32_t(elem-_vertexElements);

			const D3D12_INPUT_ELEMENT_DESC inst = { "TEXCOORD", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, D3D12_APPEND_ALIGNED_ELEMENT, D3D12_INPUT_CLASSIFICATION_PER_INSTANCE_DATA, 1 };

			for (uint32_t ii = 0; ii < _numInstanceData; ++ii)
			{
				uint32_t index = 7 - ii; // TEXCOORD7 = i_data0, TEXCOORD6 = i_data1, etc.

				uint32_t jj;
				D3D12_INPUT_ELEMENT_DESC* curr = _vertexElements;
				for (jj = 0; jj < num; ++jj)
				{
					curr = &_vertexElements[jj];
					if (0 == strcmp(curr->SemanticName, "TEXCOORD")
					&&  curr->SemanticIndex == index)
					{
						break;
					}
				}

				if (jj == num)
				{
					curr = elem;
					++elem;
				}

				memcpy(curr, &inst, sizeof(D3D12_INPUT_ELEMENT_DESC) );
				curr->InputSlot = 1;
				curr->SemanticIndex = index;
				curr->AlignedByteOffset = ii*16;
			}

			return uint32_t(elem-_vertexElements);
		}

		static void patchCb0(DxbcInstruction& _instruction, void* _userData)
		{
			union { void* ptr; uint32_t offset; } cast = { _userData };

			for (uint32_t ii = 0; ii < _instruction.numOperands; ++ii)
			{
				DxbcOperand& operand = _instruction.operand[ii];
				if (DxbcOperandType::ConstantBuffer == operand.type)
				{
					if (DxbcOperandAddrMode::Imm32 == operand.addrMode[0]
					&&  0 == operand.regIndex[0]
					&&  DxbcOperandAddrMode::Imm32 == operand.addrMode[1])
					{
						operand.regIndex[1] += cast.offset;
					}
				}
			}
		}

		ID3D12PipelineState* getPipelineState(uint16_t _programIdx)
		{
			ProgramD3D12& program = m_program[_programIdx];

			bx::HashMurmur2A murmur;
			murmur.begin();
			murmur.add(program.m_vsh->m_hash);
			const uint32_t hash = murmur.end();

			ID3D12PipelineState* pso = m_pipelineStateCache.find(hash);

			if(NULL != pso)
			{
				return pso;
			}

			D3D12_COMPUTE_PIPELINE_STATE_DESC desc;
			memset(&desc, 0, sizeof(desc) );

			desc.pRootSignature = m_rootSignature;

			desc.CS.pShaderBytecode = program.m_vsh->m_code->data;
			desc.CS.BytecodeLength  = program.m_vsh->m_code->size;

			DX_CHECK(m_device->CreateComputePipelineState(&desc
				,__uuidof(ID3D12PipelineState)
				,(void**)&pso
				));
			m_pipelineStateCache.add(hash, pso);

			return pso;
		}

		ID3D12PipelineState* getPipelineState(uint64_t _state, uint64_t _stencil, uint16_t _declIdx, uint16_t _programIdx, uint8_t _numInstanceData)
		{
			ProgramD3D12& program = m_program[_programIdx];

			_state &= 0
				| BGFX_STATE_RGB_WRITE
				| BGFX_STATE_ALPHA_WRITE
				| BGFX_STATE_DEPTH_WRITE
				| BGFX_STATE_DEPTH_TEST_MASK
				| BGFX_STATE_BLEND_MASK
				| BGFX_STATE_BLEND_EQUATION_MASK
				| BGFX_STATE_BLEND_INDEPENDENT
				| BGFX_STATE_CULL_MASK
				| BGFX_STATE_MSAA
				| BGFX_STATE_PT_MASK
				;

			_stencil &= packStencil(~BGFX_STENCIL_FUNC_REF_MASK, BGFX_STENCIL_MASK);

			VertexDecl decl;
			memcpy(&decl, &m_vertexDecls[_declIdx], sizeof(VertexDecl) );
			const uint16_t* attrMask = program.m_vsh->m_attrMask;

			for (uint32_t ii = 0; ii < Attrib::Count; ++ii)
			{
				uint16_t mask = attrMask[ii];
				uint16_t attr = (decl.m_attributes[ii] & mask);
				decl.m_attributes[ii] = attr == 0 ? UINT16_MAX : attr == UINT16_MAX ? 0 : attr;
			}

			bx::HashMurmur2A murmur;
			murmur.begin();
			murmur.add(_state);
			murmur.add(_stencil);
			murmur.add(program.m_vsh->m_hash);
			murmur.add(program.m_vsh->m_attrMask, sizeof(program.m_vsh->m_attrMask) );
			murmur.add(program.m_fsh->m_hash);
			murmur.add(m_vertexDecls[_declIdx].m_hash);
			murmur.add(decl.m_attributes, sizeof(decl.m_attributes) );
			murmur.add(m_fbh.idx);
			murmur.add(_numInstanceData);
			const uint32_t hash = murmur.end();

			ID3D12PipelineState* pso = m_pipelineStateCache.find(hash);

			if (NULL != pso)
			{
				return pso;
			}

			D3D12_GRAPHICS_PIPELINE_STATE_DESC desc;
			memset(&desc, 0, sizeof(desc) );

			desc.pRootSignature = m_rootSignature;

			desc.VS.pShaderBytecode = program.m_vsh->m_code->data;
			desc.VS.BytecodeLength  = program.m_vsh->m_code->size;

 			const Memory* temp = alloc(program.m_fsh->m_code->size);
 			memset(temp->data, 0, temp->size);
 			bx::MemoryReader rd(program.m_fsh->m_code->data, program.m_fsh->m_code->size);
 			bx::StaticMemoryBlockWriter wr(temp->data, temp->size);

			DxbcContext dxbc;
			read(&rd, dxbc);

			bool patchShader = true;
			if (BX_ENABLED(BGFX_CONFIG_DEBUG) )
			{
				union { uint32_t offset; void* ptr; } cast = { 0 };
				filter(dxbc.shader, dxbc.shader, patchCb0, cast.ptr);

				write(&wr, dxbc);

				dxbcHash(temp->data + 20, temp->size - 20, temp->data + 4);

				patchShader = 0 == memcmp(program.m_fsh->m_code->data, temp->data, 16);
				BX_CHECK(patchShader, "DXBC fragment shader patching error (ShaderHandle: %d).", program.m_fsh - m_shaders);

				if (!patchShader)
				{
					for (uint32_t ii = 20; ii < temp->size; ii += 16)
					{
						if (0 != memcmp(&program.m_fsh->m_code->data[ii], &temp->data[ii], 16) )
						{
// 							dbgPrintfData(&program.m_fsh->m_code->data[ii], temp->size-ii, "");
// 							dbgPrintfData(&temp->data[ii], temp->size-ii, "");
							break;
						}
					}

					desc.PS.pShaderBytecode = program.m_fsh->m_code->data;
					desc.PS.BytecodeLength  = program.m_fsh->m_code->size;
				}
			}

			if (patchShader)
			{
				memcpy(temp->data, program.m_fsh->m_code->data, program.m_fsh->m_code->size);

				bx::seek(&wr, 0, bx::Whence::Begin);
				union { uint32_t offset; void* ptr; } cast =
				{
					m_currentProgram->m_vsh->m_size/16
				};
				filter(dxbc.shader, dxbc.shader, patchCb0, cast.ptr);
				write(&wr, dxbc);
				dxbcHash(temp->data + 20, temp->size - 20, temp->data + 4);

				desc.PS.pShaderBytecode = temp->data;
				desc.PS.BytecodeLength  = temp->size;
			}

			desc.DS.pShaderBytecode = NULL;
			desc.DS.BytecodeLength  = 0;

			desc.HS.pShaderBytecode = NULL;
			desc.HS.BytecodeLength  = 0;

			desc.GS.pShaderBytecode = NULL;
			desc.GS.BytecodeLength  = 0;

			desc.StreamOutput.pSODeclaration   = NULL;
			desc.StreamOutput.NumEntries       = 0;
			desc.StreamOutput.pBufferStrides   = NULL;
			desc.StreamOutput.NumStrides       = 0;
			desc.StreamOutput.RasterizedStream = 0;

			setBlendState(desc.BlendState, _state);
			desc.SampleMask = 1;
			setRasterizerState(desc.RasterizerState, _state);
			setDepthStencilState(desc.DepthStencilState, _state, _stencil);

			D3D12_INPUT_ELEMENT_DESC vertexElements[Attrib::Count + 1 + BGFX_CONFIG_MAX_INSTANCE_DATA_COUNT];
			desc.InputLayout.NumElements = setInputLayout(vertexElements, m_vertexDecls[_declIdx], program, _numInstanceData);
			desc.InputLayout.pInputElementDescs = vertexElements;

			uint8_t primIndex = uint8_t( (_state&BGFX_STATE_PT_MASK) >> BGFX_STATE_PT_SHIFT);
			desc.PrimitiveTopologyType = s_primInfo[primIndex].m_topologyType;

			if (isValid(m_fbh) )
			{
				const FrameBufferD3D12& frameBuffer = m_frameBuffers[m_fbh.idx];
				desc.NumRenderTargets = frameBuffer.m_num;

				for (uint8_t ii = 0, num = frameBuffer.m_num; ii < num; ++ii)
				{
					desc.RTVFormats[ii] = m_textures[frameBuffer.m_texture[ii].idx].m_srvd.Format;
				}

				if (isValid(frameBuffer.m_depth) )
				{
					desc.DSVFormat = s_textureFormat[m_textures[frameBuffer.m_depth.idx].m_textureFormat].m_fmtDsv;
				}
				else
				{
					desc.DSVFormat = DXGI_FORMAT_UNKNOWN;
				}
			}
			else
			{
				desc.NumRenderTargets = 1;
				desc.RTVFormats[0] = DXGI_FORMAT_R8G8B8A8_UNORM;
				desc.DSVFormat     = DXGI_FORMAT_D24_UNORM_S8_UINT;
			}

			desc.SampleDesc.Count   = 1;
			desc.SampleDesc.Quality = 0;

			uint32_t length = g_callback->cacheReadSize(hash);
			bool cached = length > 0;

			void* cachedData = NULL;

			if (cached)
			{
				cachedData = BX_ALLOC(g_allocator, length);
				if (g_callback->cacheRead(hash, cachedData, length) )
				{
					BX_TRACE("Loading chached PSO (size %d).", length);
					bx::MemoryReader reader(cachedData, length);

// 					uint32_t format;
// 					bx::read(&reader, format);

					desc.CachedPSO.pCachedBlob           = reader.getDataPtr();
					desc.CachedPSO.CachedBlobSizeInBytes = (size_t)reader.remaining();

					HRESULT hr = m_device->CreateGraphicsPipelineState(&desc
									, __uuidof(ID3D12PipelineState)
									, (void**)&pso
									);
					if (FAILED(hr) )
					{
						BX_TRACE("Failed to load cached PSO (HRESULT 0x%08x).", hr);
						memset(&desc.CachedPSO, 0, sizeof(desc.CachedPSO) );
					}
				}
			}

			if (NULL == pso)
			{
				DX_CHECK(m_device->CreateGraphicsPipelineState(&desc
						, __uuidof(ID3D12PipelineState)
						, (void**)&pso
						) );
			}
			m_pipelineStateCache.add(hash, pso);

			release(temp);

			ID3DBlob* blob;
			HRESULT hr = pso->GetCachedBlob(&blob);
			if (SUCCEEDED(hr) )
			{
				void* data = blob->GetBufferPointer();
				length = (uint32_t)blob->GetBufferSize();

				g_callback->cacheWrite(hash, data, length);

				DX_RELEASE(blob, 0);
			}

			if (NULL != cachedData)
			{
				BX_FREE(g_allocator, cachedData);
			}

			return pso;
		}

		uint16_t getSamplerState(const uint32_t* _flags, uint32_t _num = BGFX_CONFIG_MAX_TEXTURE_SAMPLERS)
		{
			bx::HashMurmur2A murmur;
			murmur.begin();
			murmur.add(_flags, _num * sizeof(uint32_t) );
			uint32_t hash = murmur.end();

			uint16_t sampler = m_samplerStateCache.find(hash);
			if (UINT16_MAX == sampler)
			{
				sampler = m_samplerAllocator.alloc(_flags, _num);
				m_samplerStateCache.add(hash, sampler);
			}

			return sampler;
		}

		void commit(ConstantBuffer& _constantBuffer)
		{
			_constantBuffer.reset();

			for (;;)
			{
				uint32_t opcode = _constantBuffer.read();

				if (UniformType::End == opcode)
				{
					break;
				}

				UniformType::Enum type;
				uint16_t loc;
				uint16_t num;
				uint16_t copy;
				ConstantBuffer::decodeOpcode(opcode, type, loc, num, copy);

				const char* data;
				if (copy)
				{
					data = _constantBuffer.read(g_uniformTypeSize[type]*num);
				}
				else
				{
					UniformHandle handle;
					memcpy(&handle, _constantBuffer.read(sizeof(UniformHandle) ), sizeof(UniformHandle) );
					data = (const char*)m_uniforms[handle.idx];
				}

#define CASE_IMPLEMENT_UNIFORM(_uniform, _dxsuffix, _type) \
				case UniformType::_uniform: \
				case UniformType::_uniform|BGFX_UNIFORM_FRAGMENTBIT: \
						{ \
							setShaderUniform(type, loc, data, num); \
						} \
						break;

				switch ( (int32_t)type)
				{
				case UniformType::Mat3:
				case UniformType::Mat3|BGFX_UNIFORM_FRAGMENTBIT:
					 {
						 float* value = (float*)data;
						 for (uint32_t ii = 0, count = num/3; ii < count; ++ii,  loc += 3*16, value += 9)
						 {
							 Matrix4 mtx;
							 mtx.un.val[ 0] = value[0];
							 mtx.un.val[ 1] = value[1];
							 mtx.un.val[ 2] = value[2];
							 mtx.un.val[ 3] = 0.0f;
							 mtx.un.val[ 4] = value[3];
							 mtx.un.val[ 5] = value[4];
							 mtx.un.val[ 6] = value[5];
							 mtx.un.val[ 7] = 0.0f;
							 mtx.un.val[ 8] = value[6];
							 mtx.un.val[ 9] = value[7];
							 mtx.un.val[10] = value[8];
							 mtx.un.val[11] = 0.0f;
							 setShaderUniform(type, loc, &mtx.un.val[0], 3);
						 }
					}
					break;

				CASE_IMPLEMENT_UNIFORM(Int1, I, int);
				CASE_IMPLEMENT_UNIFORM(Vec4, F, float);
				CASE_IMPLEMENT_UNIFORM(Mat4, F, float);

				case UniformType::End:
					break;

				default:
					BX_TRACE("%4d: INVALID 0x%08x, t %d, l %d, n %d, c %d", _constantBuffer.getPos(), opcode, type, loc, num, copy);
					break;
				}
#undef CASE_IMPLEMENT_UNIFORM
			}
		}

		void clear(const Clear& _clear, const float _palette[][4], const D3D12_RECT* _rect = NULL, uint32_t _num = 0)
		{
			if (isValid(m_fbh) )
			{
				FrameBufferD3D12& frameBuffer = m_frameBuffers[m_fbh.idx];
				frameBuffer.clear(m_commandList, _clear, _palette);
			}
			else
			{
				if (NULL != m_currentColor
				&&  BGFX_CLEAR_COLOR & _clear.m_flags)
				{
					if (BGFX_CLEAR_COLOR_USE_PALETTE & _clear.m_flags)
					{
						uint8_t index = _clear.m_index[0];
						if (UINT8_MAX != index)
						{
							m_commandList->ClearRenderTargetView(*m_currentColor
								, _palette[index]
								, _num
								, _rect
								);
						}
					}
					else
					{
						float frgba[4] =
						{
							_clear.m_index[0] * 1.0f / 255.0f,
							_clear.m_index[1] * 1.0f / 255.0f,
							_clear.m_index[2] * 1.0f / 255.0f,
							_clear.m_index[3] * 1.0f / 255.0f,
						};
						m_commandList->ClearRenderTargetView(*m_currentColor
							, frgba
							, _num
							, _rect
							);
					}
				}

				if (NULL != m_currentDepthStencil
				&& (BGFX_CLEAR_DEPTH | BGFX_CLEAR_STENCIL) & _clear.m_flags)
				{
					uint32_t flags = 0;
					flags |= (_clear.m_flags & BGFX_CLEAR_DEPTH  ) ? D3D12_CLEAR_FLAG_DEPTH   : 0;
					flags |= (_clear.m_flags & BGFX_CLEAR_STENCIL) ? D3D12_CLEAR_FLAG_STENCIL : 0;

					m_commandList->ClearDepthStencilView(*m_currentDepthStencil
						, D3D12_CLEAR_FLAGS(flags)
						, _clear.m_depth
						, _clear.m_stencil
						, _num
						, _rect
						);
				}
			}
		}

		void clearQuad(ClearQuad& _clearQuad, const Rect& _rect, const Clear& _clear, const float _palette[][4])
		{
			BX_UNUSED(_clearQuad);

			uint32_t width  = m_scd.BufferDesc.Width;
			uint32_t height = m_scd.BufferDesc.Height;

			if (0      == _rect.m_x
			&&  0      == _rect.m_y
			&&  width  == _rect.m_width
			&&  height == _rect.m_height)
			{
				clear(_clear, _palette);
			}
			else
			{
				D3D12_RECT rect;
				rect.left   = _rect.m_x;
				rect.top    = _rect.m_y;
				rect.right  = _rect.m_x + _rect.m_width;
				rect.bottom = _rect.m_y + _rect.m_height;
				clear(_clear, _palette, &rect);
			}
		}

		uint64_t kick()
		{
			uint64_t fence = m_cmd.kick();
			m_commandList = m_cmd.alloc();
			return fence;
		}

		void finish()
		{
			m_cmd.kick();
			m_cmd.finish();
			m_commandList = NULL;
		}

		void finishAll()
		{
			uint64_t fence = m_cmd.kick();
			m_cmd.finish(fence, true);
			m_commandList = NULL;
		}

		void* m_d3d12dll;
		void* m_dxgidll;

		D3D_DRIVER_TYPE m_driverType;
		IDXGIAdapter* m_adapter;
		DXGI_ADAPTER_DESC m_adapterDesc;
		D3D12_FEATURE_DATA_ARCHITECTURE m_architecture;
		D3D12_FEATURE_DATA_D3D12_OPTIONS m_options;

		IDXGIFactory4* m_factory;

		IDXGISwapChain3* m_swapChain;
		int64_t m_presentElapsed;
		uint16_t m_lost;
		uint16_t m_numWindows;
		FrameBufferHandle m_windows[BGFX_CONFIG_MAX_FRAME_BUFFERS];

		ID3D12Device* m_device;
		ID3D12InfoQueue* m_infoQueue;

		ID3D12DescriptorHeap* m_rtvDescriptorHeap;
		ID3D12DescriptorHeap* m_dsvDescriptorHeap;
		D3D12_CPU_DESCRIPTOR_HANDLE m_rtvHandle;
		D3D12_CPU_DESCRIPTOR_HANDLE m_dsvHandle;
		D3D12_CPU_DESCRIPTOR_HANDLE* m_currentColor;
		D3D12_CPU_DESCRIPTOR_HANDLE* m_currentDepthStencil;
		ID3D12Resource* m_backBufferColor[4];
		uint64_t m_backBufferColorFence[4];
		ID3D12Resource* m_backBufferDepthStencil;

		ScratchBufferD3D12 m_scratchBuffer[4];
		DescriptorAllocator m_samplerAllocator;

		ID3D12RootSignature* m_rootSignature;
		ID3D12CommandSignature* m_commandSignature[2];

		CommandQueue m_cmd;
		ID3D12GraphicsCommandList* m_commandList;

		Resolution m_resolution;
		bool m_wireframe;

		DXGI_SWAP_CHAIN_DESC m_scd;
		uint32_t m_flags;

		BufferD3D12 m_indexBuffers[BGFX_CONFIG_MAX_INDEX_BUFFERS];
		VertexBufferD3D12 m_vertexBuffers[BGFX_CONFIG_MAX_VERTEX_BUFFERS];
		ShaderD3D12 m_shaders[BGFX_CONFIG_MAX_SHADERS];
		ProgramD3D12 m_program[BGFX_CONFIG_MAX_PROGRAMS];
		TextureD3D12 m_textures[BGFX_CONFIG_MAX_TEXTURES];
		VertexDecl m_vertexDecls[BGFX_CONFIG_MAX_VERTEX_DECLS];
		FrameBufferD3D12 m_frameBuffers[BGFX_CONFIG_MAX_FRAME_BUFFERS];
		void* m_uniforms[BGFX_CONFIG_MAX_UNIFORMS];
		Matrix4 m_predefinedUniforms[PredefinedUniform::Count];
		UniformRegistry m_uniformReg;

		StateCacheT<ID3D12PipelineState> m_pipelineStateCache;
		StateCache m_samplerStateCache;

		TextVideoMem m_textVideoMem;

		ProgramD3D12* m_currentProgram;
		uint8_t m_fsScratch[64<<10];
		uint8_t m_vsScratch[64<<10];
		uint32_t m_fsChanges;
		uint32_t m_vsChanges;

		FrameBufferHandle m_fbh;
		uint32_t m_backBufferColorIdx;
		bool m_rtMsaa;
	};

	static RendererContextD3D12* s_renderD3D12;

	RendererContextI* rendererCreate()
	{
		s_renderD3D12 = BX_NEW(g_allocator, RendererContextD3D12);
		if (!s_renderD3D12->init() )
		{
			BX_DELETE(g_allocator, s_renderD3D12);
			s_renderD3D12 = NULL;
		}
		return s_renderD3D12;
	}

	void rendererDestroy()
	{
		s_renderD3D12->shutdown();
		BX_DELETE(g_allocator, s_renderD3D12);
		s_renderD3D12 = NULL;
	}

	void ScratchBufferD3D12::create(uint32_t _size, uint32_t _maxDescriptors)
	{
		m_size = _size;

		ID3D12Device* device = s_renderD3D12->m_device;

		m_incrementSize = device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV);

		D3D12_DESCRIPTOR_HEAP_DESC desc;
		desc.NumDescriptors = _maxDescriptors;
		desc.Type     = D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV;
		desc.Flags    = D3D12_DESCRIPTOR_HEAP_FLAG_SHADER_VISIBLE;
		desc.NodeMask = 1;
		DX_CHECK(device->CreateDescriptorHeap(&desc
				, __uuidof(ID3D12DescriptorHeap)
				, (void**)&m_heap
				) );

		m_upload = createCommittedResource(device, HeapProperty::Upload, desc.NumDescriptors * 1024);
		m_gpuVA  = m_upload->GetGPUVirtualAddress();
		m_upload->Map(0, NULL, (void**)&m_data);

		reset(m_gpuHandle);
	}

	void ScratchBufferD3D12::destroy()
	{
		m_upload->Unmap(0, NULL);

		DX_RELEASE(m_upload, 0);
		DX_RELEASE(m_heap, 0);
	}

	void ScratchBufferD3D12::reset(D3D12_GPU_DESCRIPTOR_HANDLE& gpuHandle)
	{
		m_pos = 0;
		m_cpuHandle = m_heap->GetCPUDescriptorHandleForHeapStart();
		m_gpuHandle = m_heap->GetGPUDescriptorHandleForHeapStart();
		gpuHandle = m_gpuHandle;
	}

	void* ScratchBufferD3D12::alloc(D3D12_GPU_VIRTUAL_ADDRESS& _gpuAddress, uint32_t _size)
	{
		_gpuAddress = m_gpuVA + m_pos;
		D3D12_CONSTANT_BUFFER_VIEW_DESC desc;
		desc.BufferLocation = _gpuAddress;
		desc.SizeInBytes    = _size;

		void* data = &m_data[m_pos];

		m_pos += BX_ALIGN_256(_size);

		ID3D12Device* device = s_renderD3D12->m_device;
		device->CreateConstantBufferView(&desc
			, m_cpuHandle
			);
		m_cpuHandle.ptr += m_incrementSize;
		m_gpuHandle.ptr += m_incrementSize;

		return data;
	}

	void ScratchBufferD3D12::alloc(D3D12_GPU_DESCRIPTOR_HANDLE& gpuHandle, TextureD3D12& _texture)
	{
		ID3D12Device* device = s_renderD3D12->m_device;
		device->CreateShaderResourceView(_texture.m_ptr
			, &_texture.m_srvd
			, m_cpuHandle
			);
		m_cpuHandle.ptr += m_incrementSize;

		gpuHandle = m_gpuHandle;
		m_gpuHandle.ptr += m_incrementSize;
	}

	void ScratchBufferD3D12::allocUav(D3D12_GPU_DESCRIPTOR_HANDLE& gpuHandle, TextureD3D12& _texture, uint8_t _mip)
	{
		ID3D12Device* device = s_renderD3D12->m_device;

		D3D12_UNORDERED_ACCESS_VIEW_DESC tmpUavd;
		D3D12_UNORDERED_ACCESS_VIEW_DESC* uavd = &_texture.m_uavd;
		if (0 != _mip)
		{
			memcpy(&tmpUavd, uavd, sizeof(tmpUavd) );
			switch (_texture.m_uavd.ViewDimension)
			{
			default:
			case D3D12_UAV_DIMENSION_TEXTURE2D:
				uavd->Texture2D.MipSlice = _mip;
				break;

			case D3D12_UAV_DIMENSION_TEXTURE3D:
				uavd->Texture3D.MipSlice = _mip;
				break;
			}

			uavd = &tmpUavd;
		}

		device->CreateUnorderedAccessView(_texture.m_ptr
			, NULL
			, uavd
			, m_cpuHandle
			);
		m_cpuHandle.ptr += m_incrementSize;

		gpuHandle = m_gpuHandle;
		m_gpuHandle.ptr += m_incrementSize;
	}

	void ScratchBufferD3D12::alloc(D3D12_GPU_DESCRIPTOR_HANDLE& gpuHandle, BufferD3D12& _buffer)
	{
		ID3D12Device* device = s_renderD3D12->m_device;
		device->CreateShaderResourceView(_buffer.m_ptr
			, &_buffer.m_srvd
			, m_cpuHandle
			);
		m_cpuHandle.ptr += m_incrementSize;

		gpuHandle = m_gpuHandle;
		m_gpuHandle.ptr += m_incrementSize;
	}

	void ScratchBufferD3D12::allocUav(D3D12_GPU_DESCRIPTOR_HANDLE& gpuHandle, BufferD3D12& _buffer)
	{
		ID3D12Device* device = s_renderD3D12->m_device;
		device->CreateUnorderedAccessView(_buffer.m_ptr
			, NULL
			, &_buffer.m_uavd
			, m_cpuHandle
			);
		m_cpuHandle.ptr += m_incrementSize;

		gpuHandle = m_gpuHandle;
		m_gpuHandle.ptr += m_incrementSize;
	}

	void DescriptorAllocator::create(D3D12_DESCRIPTOR_HEAP_TYPE _type, uint32_t _maxDescriptors, uint16_t _numDescriptorsPerBlock)
	{
		m_handleAlloc = bx::createHandleAlloc(g_allocator, _maxDescriptors);
		m_numDescriptorsPerBlock = _numDescriptorsPerBlock;

		ID3D12Device* device = s_renderD3D12->m_device;

		m_incrementSize = device->GetDescriptorHandleIncrementSize(_type);

		D3D12_DESCRIPTOR_HEAP_DESC desc;
		desc.NumDescriptors = _maxDescriptors;
		desc.Type     = _type;
		desc.Flags    = D3D12_DESCRIPTOR_HEAP_FLAG_SHADER_VISIBLE;
		desc.NodeMask = 1;
		DX_CHECK(device->CreateDescriptorHeap(&desc
				, __uuidof(ID3D12DescriptorHeap)
				, (void**)&m_heap
				) );

		m_cpuHandle = m_heap->GetCPUDescriptorHandleForHeapStart();
		m_gpuHandle = m_heap->GetGPUDescriptorHandleForHeapStart();
	}

	void DescriptorAllocator::destroy()
	{
		bx::destroyHandleAlloc(g_allocator, m_handleAlloc);

		DX_RELEASE(m_heap, 0);
	}

	uint16_t DescriptorAllocator::alloc(ID3D12Resource* _ptr, const D3D12_SHADER_RESOURCE_VIEW_DESC* _desc)
	{
		uint16_t idx = m_handleAlloc->alloc();

		D3D12_CPU_DESCRIPTOR_HANDLE cpuHandle = { m_cpuHandle.ptr + idx * m_incrementSize };

		ID3D12Device* device = s_renderD3D12->m_device;
		device->CreateShaderResourceView(_ptr
			, _desc
			, cpuHandle
			);

		return idx;
	}

	uint16_t DescriptorAllocator::alloc(const uint32_t* _flags, uint32_t _num)
	{
		uint16_t idx = m_handleAlloc->alloc();

		ID3D12Device* device = s_renderD3D12->m_device;

		for (uint32_t ii = 0; ii < _num; ++ii)
		{
			uint32_t flags = _flags[ii];

			const uint32_t cmpFunc   = (flags&BGFX_TEXTURE_COMPARE_MASK)>>BGFX_TEXTURE_COMPARE_SHIFT;
			const uint8_t  minFilter = s_textureFilter[0][(flags&BGFX_TEXTURE_MIN_MASK)>>BGFX_TEXTURE_MIN_SHIFT];
			const uint8_t  magFilter = s_textureFilter[1][(flags&BGFX_TEXTURE_MAG_MASK)>>BGFX_TEXTURE_MAG_SHIFT];
			const uint8_t  mipFilter = s_textureFilter[2][(flags&BGFX_TEXTURE_MIP_MASK)>>BGFX_TEXTURE_MIP_SHIFT];
			const uint8_t  filter    = 0 == cmpFunc ? 0 : D3D12_FILTER_COMPARISON_MIN_MAG_MIP_POINT;

			D3D12_SAMPLER_DESC sd;
			sd.Filter   = (D3D12_FILTER)(filter|minFilter|magFilter|mipFilter);
			sd.AddressU = s_textureAddress[(flags&BGFX_TEXTURE_U_MASK)>>BGFX_TEXTURE_U_SHIFT];
			sd.AddressV = s_textureAddress[(flags&BGFX_TEXTURE_V_MASK)>>BGFX_TEXTURE_V_SHIFT];
			sd.AddressW = s_textureAddress[(flags&BGFX_TEXTURE_W_MASK)>>BGFX_TEXTURE_W_SHIFT];
			sd.MinLOD   = 0;
			sd.MaxLOD   = D3D12_FLOAT32_MAX;
			sd.MipLODBias     = 0.0f;
			sd.MaxAnisotropy  = 1; //m_maxAnisotropy;
			sd.ComparisonFunc = 0 == cmpFunc ? D3D12_COMPARISON_FUNC_NEVER : s_cmpFunc[cmpFunc];

			D3D12_CPU_DESCRIPTOR_HANDLE cpuHandle =
			{
				m_cpuHandle.ptr + (idx * m_numDescriptorsPerBlock + ii) * m_incrementSize
			};

			device->CreateSampler(&sd, cpuHandle);
		}

		return idx;
	}

	void DescriptorAllocator::free(uint16_t _idx)
	{
		m_handleAlloc->free(_idx);
	}

	void DescriptorAllocator::reset()
	{
		uint16_t max = m_handleAlloc->getMaxHandles();
		bx::destroyHandleAlloc(g_allocator, m_handleAlloc);
		m_handleAlloc = bx::createHandleAlloc(g_allocator, max);
	}

	D3D12_GPU_DESCRIPTOR_HANDLE DescriptorAllocator::get(uint16_t _idx)
	{
		D3D12_GPU_DESCRIPTOR_HANDLE gpuHandle = { m_gpuHandle.ptr + _idx * m_numDescriptorsPerBlock * m_incrementSize };
		return gpuHandle;
	}

	struct UavFormat
	{
		DXGI_FORMAT format[3];
		uint32_t    stride;
	};

	static const UavFormat s_uavFormat[] =
	{	//  BGFX_BUFFER_COMPUTE_TYPE_UINT, BGFX_BUFFER_COMPUTE_TYPE_INT,   BGFX_BUFFER_COMPUTE_TYPE_FLOAT
		{ { DXGI_FORMAT_UNKNOWN,           DXGI_FORMAT_UNKNOWN,            DXGI_FORMAT_UNKNOWN            },  0 }, // ignored
		{ { DXGI_FORMAT_R8_SINT,           DXGI_FORMAT_R8_UINT,            DXGI_FORMAT_UNKNOWN            },  1 }, // BGFX_BUFFER_COMPUTE_FORMAT_8x1
		{ { DXGI_FORMAT_R8G8_SINT,         DXGI_FORMAT_R8G8_UINT,          DXGI_FORMAT_UNKNOWN            },  2 }, // BGFX_BUFFER_COMPUTE_FORMAT_8x2
		{ { DXGI_FORMAT_R8G8B8A8_SINT,     DXGI_FORMAT_R8G8B8A8_UINT,      DXGI_FORMAT_UNKNOWN            },  4 }, // BGFX_BUFFER_COMPUTE_FORMAT_8x4
		{ { DXGI_FORMAT_R16_SINT,          DXGI_FORMAT_R16_UINT,           DXGI_FORMAT_R16_FLOAT          },  2 }, // BGFX_BUFFER_COMPUTE_FORMAT_16x1
		{ { DXGI_FORMAT_R16G16_SINT,       DXGI_FORMAT_R16G16_UINT,        DXGI_FORMAT_R16G16_FLOAT       },  4 }, // BGFX_BUFFER_COMPUTE_FORMAT_16x2
		{ { DXGI_FORMAT_R16G16B16A16_SINT, DXGI_FORMAT_R16G16B16A16_UINT,  DXGI_FORMAT_R16G16B16A16_FLOAT },  8 }, // BGFX_BUFFER_COMPUTE_FORMAT_16x4
		{ { DXGI_FORMAT_R32_SINT,          DXGI_FORMAT_R32_UINT,           DXGI_FORMAT_R32_FLOAT          },  4 }, // BGFX_BUFFER_COMPUTE_FORMAT_32x1
		{ { DXGI_FORMAT_R32G32_SINT,       DXGI_FORMAT_R32G32_UINT,        DXGI_FORMAT_R32G32_FLOAT       },  8 }, // BGFX_BUFFER_COMPUTE_FORMAT_32x2
		{ { DXGI_FORMAT_R32G32B32A32_SINT, DXGI_FORMAT_R32G32B32A32_UINT,  DXGI_FORMAT_R32G32B32A32_FLOAT }, 16 }, // BGFX_BUFFER_COMPUTE_FORMAT_32x4
	};

	void BufferD3D12::create(uint32_t _size, void* _data, uint16_t _flags, bool _vertex, uint32_t _stride)
	{
		m_size    = _size;
		m_flags   = _flags;

		const bool needUav = 0 != (_flags & (BGFX_BUFFER_COMPUTE_WRITE|BGFX_BUFFER_DRAW_INDIRECT));
//		const bool needSrv = 0 != (_flags & BGFX_BUFFER_COMPUTE_READ);
		const bool drawIndirect = 0 != (_flags & BGFX_BUFFER_DRAW_INDIRECT);
		m_dynamic = NULL == _data || needUav;

		DXGI_FORMAT format;
		uint32_t    stride;

		D3D12_RESOURCE_FLAGS flags = needUav
			? D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS
			: D3D12_RESOURCE_FLAG_NONE
			;

		if(drawIndirect)
		{
			format = DXGI_FORMAT_R32G32B32A32_UINT;
			stride = 16;
		}
		else
		{
			uint32_t uavFormat = (_flags & BGFX_BUFFER_COMPUTE_FORMAT_MASK) >> BGFX_BUFFER_COMPUTE_FORMAT_SHIFT;
			if (0 == uavFormat)
			{
				if (_vertex)
				{
					format = DXGI_FORMAT_R32G32B32A32_FLOAT;
					stride = 16;
				}
				else
				{
					if (0 == (_flags & BGFX_BUFFER_INDEX32) )
					{
						format = DXGI_FORMAT_R16_UINT;
						stride = 2;
					}
					else
					{
						format = DXGI_FORMAT_R32_UINT;
						stride = 4;
					}
				}
			}
			else
			{
				const uint32_t uavType = bx::uint32_satsub( (_flags & BGFX_BUFFER_COMPUTE_TYPE_MASK) >> BGFX_BUFFER_COMPUTE_TYPE_SHIFT, 1);
				format = s_uavFormat[uavFormat].format[uavType];
				stride = s_uavFormat[uavFormat].stride;
			}
		}

		stride = 0 == _stride ? stride : _stride;

		m_srvd.Format                      = format;
		m_srvd.ViewDimension               = D3D12_SRV_DIMENSION_BUFFER;
		m_srvd.Shader4ComponentMapping     = D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING;
		m_srvd.Buffer.FirstElement         = 0;
		m_srvd.Buffer.NumElements          = m_size / stride;
		m_srvd.Buffer.StructureByteStride  = 0;
		m_srvd.Buffer.Flags                = D3D12_BUFFER_SRV_FLAG_NONE;

		m_uavd.Format                      = format;
		m_uavd.ViewDimension               = D3D12_UAV_DIMENSION_BUFFER;
		m_uavd.Buffer.FirstElement         = 0;
		m_uavd.Buffer.NumElements          = m_size / stride;
		m_uavd.Buffer.StructureByteStride  = 0;
		m_uavd.Buffer.CounterOffsetInBytes = 0;
		m_uavd.Buffer.Flags                = D3D12_BUFFER_UAV_FLAG_NONE;

		ID3D12Device* device = s_renderD3D12->m_device;
		ID3D12GraphicsCommandList* commandList = s_renderD3D12->m_commandList;

		m_ptr   = createCommittedResource(device, HeapProperty::Default, _size, flags);
		m_gpuVA = m_ptr->GetGPUVirtualAddress();
		setState(commandList, D3D12_RESOURCE_STATE_GENERIC_READ);

		if (!m_dynamic)
		{
			update(commandList, 0, _size, _data);
		}
	}

	void BufferD3D12::update(ID3D12GraphicsCommandList* _commandList, uint32_t _offset, uint32_t _size, void* _data, bool /*_discard*/)
	{
		ID3D12Resource* staging = createCommittedResource(s_renderD3D12->m_device, HeapProperty::Upload, _size);
		uint8_t* data;
		DX_CHECK(staging->Map(0, NULL, (void**)&data) );
		memcpy(data, _data, _size);
		staging->Unmap(0, NULL);

		D3D12_RESOURCE_STATES state = setState(_commandList, D3D12_RESOURCE_STATE_COPY_DEST);
		_commandList->CopyBufferRegion(m_ptr, _offset, staging, 0, _size);
		setState(_commandList, state);

		s_renderD3D12->m_cmd.release(staging);
	}

	D3D12_RESOURCE_STATES BufferD3D12::setState(ID3D12GraphicsCommandList* _commandList, D3D12_RESOURCE_STATES _state)
	{
		if (m_state != _state)
		{
			setResourceBarrier(_commandList
				, m_ptr
				, m_state
				, _state
				);

			bx::xchg(m_state, _state);
		}

		return _state;
	}

	void VertexBufferD3D12::create(uint32_t _size, void* _data, VertexDeclHandle _declHandle, uint16_t _flags)
	{
		BufferD3D12::create(_size, _data, _flags, true);
		m_decl = _declHandle;
	}

	void ShaderD3D12::create(const Memory* _mem)
	{
		bx::MemoryReader reader(_mem->data, _mem->size);

		uint32_t magic;
		bx::read(&reader, magic);

		switch (magic)
		{
		case BGFX_CHUNK_MAGIC_CSH:
		case BGFX_CHUNK_MAGIC_FSH:
		case BGFX_CHUNK_MAGIC_VSH:
			break;

		default:
			BGFX_FATAL(false, Fatal::InvalidShader, "Unknown shader format %x.", magic);
			break;
		}

		bool fragment = BGFX_CHUNK_MAGIC_FSH == magic;

		uint32_t iohash;
		bx::read(&reader, iohash);

		uint16_t count;
		bx::read(&reader, count);

		m_numPredefined = 0;
		m_numUniforms = count;

		BX_TRACE("%s Shader consts %d"
			, BGFX_CHUNK_MAGIC_FSH == magic ? "Fragment" : BGFX_CHUNK_MAGIC_VSH == magic ? "Vertex" : "Compute"
			, count
			);

		uint8_t fragmentBit = fragment ? BGFX_UNIFORM_FRAGMENTBIT : 0;

		if (0 < count)
		{
			for (uint32_t ii = 0; ii < count; ++ii)
			{
				uint8_t nameSize;
				bx::read(&reader, nameSize);

				char name[256];
				bx::read(&reader, &name, nameSize);
				name[nameSize] = '\0';

				uint8_t type;
				bx::read(&reader, type);

				uint8_t num;
				bx::read(&reader, num);

				uint16_t regIndex;
				bx::read(&reader, regIndex);

				uint16_t regCount;
				bx::read(&reader, regCount);

				const char* kind = "invalid";

				PredefinedUniform::Enum predefined = nameToPredefinedUniformEnum(name);
				if (PredefinedUniform::Count != predefined)
				{
					kind = "predefined";
					m_predefined[m_numPredefined].m_loc   = regIndex;
					m_predefined[m_numPredefined].m_count = regCount;
					m_predefined[m_numPredefined].m_type  = predefined|fragmentBit;
					m_numPredefined++;
				}
				else
				{
					const UniformInfo* info = s_renderD3D12->m_uniformReg.find(name);

					if (NULL != info)
					{
						if (NULL == m_constantBuffer)
						{
							m_constantBuffer = ConstantBuffer::create(1024);
						}

						kind = "user";
						m_constantBuffer->writeUniformHandle( (UniformType::Enum)(type|fragmentBit), regIndex, info->m_handle, regCount);
					}
				}

				BX_TRACE("\t%s: %s (%s), num %2d, r.index %3d, r.count %2d"
					, kind
					, name
					, getUniformTypeName(UniformType::Enum(type&~BGFX_UNIFORM_FRAGMENTBIT) )
					, num
					, regIndex
					, regCount
					);
				BX_UNUSED(kind);
			}

			if (NULL != m_constantBuffer)
			{
				m_constantBuffer->finish();
			}
		}

		uint16_t shaderSize;
		bx::read(&reader, shaderSize);

		const DWORD* code = (const DWORD*)reader.getDataPtr();
		bx::skip(&reader, shaderSize+1);

		m_code = copy(code, shaderSize);

		uint8_t numAttrs;
		bx::read(&reader, numAttrs);

		memset(m_attrMask, 0, sizeof(m_attrMask) );

		for (uint32_t ii = 0; ii < numAttrs; ++ii)
		{
			uint16_t id;
			bx::read(&reader, id);

			Attrib::Enum attr = idToAttrib(id);

			if (Attrib::Count != attr)
			{
				m_attrMask[attr] = UINT16_MAX;
			}
		}

		bx::HashMurmur2A murmur;
		murmur.begin();
		murmur.add(iohash);
		murmur.add(code, shaderSize);
		murmur.add(numAttrs);
		murmur.add(m_attrMask, numAttrs);
		m_hash = murmur.end();

		bx::read(&reader, m_size);
	}

	void TextureD3D12::create(const Memory* _mem, uint32_t _flags, uint8_t _skip)
	{
		ImageContainer imageContainer;

		if (imageParse(imageContainer, _mem->data, _mem->size) )
		{
			uint8_t numMips = imageContainer.m_numMips;
			const uint32_t startLod = bx::uint32_min(_skip, numMips-1);
			numMips -= startLod;
			const ImageBlockInfo& blockInfo = getBlockInfo(TextureFormat::Enum(imageContainer.m_format) );
			const uint32_t textureWidth  = bx::uint32_max(blockInfo.blockWidth,  imageContainer.m_width >>startLod);
			const uint32_t textureHeight = bx::uint32_max(blockInfo.blockHeight, imageContainer.m_height>>startLod);

			m_flags = _flags;
			m_requestedFormat = (uint8_t)imageContainer.m_format;
			m_textureFormat   = (uint8_t)imageContainer.m_format;

			const TextureFormatInfo& tfi = s_textureFormat[m_requestedFormat];
			const bool convert = DXGI_FORMAT_UNKNOWN == tfi.m_fmt;

			uint8_t bpp = getBitsPerPixel(TextureFormat::Enum(m_textureFormat) );
			if (convert)
			{
				m_textureFormat = (uint8_t)TextureFormat::BGRA8;
				bpp = 32;
			}

			if (imageContainer.m_cubeMap)
			{
				m_type = TextureCube;
			}
			else if (imageContainer.m_depth > 1)
			{
				m_type = Texture3D;
			}
			else
			{
				m_type = Texture2D;
			}

			m_numMips = numMips;
			const uint32_t numSides = imageContainer.m_cubeMap ? 6 : 1;

			uint32_t numSrd = numMips*numSides;
			D3D12_SUBRESOURCE_DATA* srd = (D3D12_SUBRESOURCE_DATA*)alloca(numSrd*sizeof(D3D12_SUBRESOURCE_DATA) );

			uint32_t kk = 0;

			const bool compressed = isCompressed(TextureFormat::Enum(m_textureFormat) );
			const bool swizzle    = TextureFormat::BGRA8 == m_textureFormat && 0 != (m_flags&BGFX_TEXTURE_COMPUTE_WRITE);
			uint32_t blockWidth   = 1;
			uint32_t blockHeight  = 1;

			if (convert && compressed)
			{
				blockWidth  = blockInfo.blockWidth;
				blockHeight = blockInfo.blockHeight;
			}

			const bool bufferOnly   = 0 != (m_flags&BGFX_TEXTURE_RT_BUFFER_ONLY);
			const bool computeWrite = 0 != (m_flags&BGFX_TEXTURE_COMPUTE_WRITE);
			const bool renderTarget = 0 != (m_flags&BGFX_TEXTURE_RT_MASK);

			BX_TRACE("Texture %3d: %s (requested: %s), %dx%d%s RT[%c], BO[%c], CW[%c]%s."
				, this - s_renderD3D12->m_textures
				, getName( (TextureFormat::Enum)m_textureFormat)
				, getName( (TextureFormat::Enum)m_requestedFormat)
				, textureWidth
				, textureHeight
				, imageContainer.m_cubeMap ? "x6" : ""
				, renderTarget ? 'x' : ' '
				, bufferOnly   ? 'x' : ' '
				, computeWrite ? 'x' : ' '
				, swizzle ? " (swizzle BGRA8 -> RGBA8)" : ""
				);

			uint32_t totalSize = 0;

			for (uint8_t side = 0; side < numSides; ++side)
			{
				uint32_t width  = textureWidth;
				uint32_t height = textureHeight;
				uint32_t depth  = imageContainer.m_depth;

				for (uint32_t lod = 0; lod < numMips; ++lod)
				{
					width  = bx::uint32_max(blockWidth,  width);
					height = bx::uint32_max(blockHeight, height);
					depth  = bx::uint32_max(1, depth);

					ImageMip mip;
					if (imageGetRawData(imageContainer, side, lod+startLod, _mem->data, _mem->size, mip) )
					{
						if (convert)
						{
							const uint32_t pitch = bx::strideAlign(width*bpp / 8,  D3D12_TEXTURE_DATA_PITCH_ALIGNMENT);
							const uint32_t slice = bx::strideAlign(pitch * height, D3D12_TEXTURE_DATA_PLACEMENT_ALIGNMENT);

							uint8_t* temp = (uint8_t*)BX_ALLOC(g_allocator, slice);
							imageDecodeToBgra8(temp
									, mip.m_data
									, mip.m_width
									, mip.m_height
									, pitch, mip.m_format
									);

							srd[kk].pData      = temp;
							srd[kk].RowPitch   = pitch;
							srd[kk].SlicePitch = slice;
							totalSize += slice;
						}
						else if (compressed)
						{
							uint32_t pitch = bx::strideAlign( (mip.m_width /blockInfo.blockWidth )*mip.m_blockSize, D3D12_TEXTURE_DATA_PITCH_ALIGNMENT);
							uint32_t slice = bx::strideAlign( (mip.m_height/blockInfo.blockHeight)*pitch,           D3D12_TEXTURE_DATA_PLACEMENT_ALIGNMENT);

							uint8_t* temp = (uint8_t*)BX_ALLOC(g_allocator, slice);
							imageCopy(mip.m_height/blockInfo.blockHeight
									, (mip.m_width /blockInfo.blockWidth )*mip.m_blockSize
									, mip.m_data
									, pitch
									, temp
									);

							srd[kk].pData      = temp;
							srd[kk].RowPitch   = pitch;
							srd[kk].SlicePitch = slice;
							totalSize += slice;
						}
						else
						{
							const uint32_t pitch = bx::strideAlign(mip.m_width*mip.m_bpp / 8, D3D12_TEXTURE_DATA_PITCH_ALIGNMENT);
							const uint32_t slice = bx::strideAlign(pitch * mip.m_height,      D3D12_TEXTURE_DATA_PLACEMENT_ALIGNMENT);

							uint8_t* temp = (uint8_t*)BX_ALLOC(g_allocator, slice);
							imageCopy(mip.m_height
									, mip.m_width*mip.m_bpp / 8
									, mip.m_data
									, pitch
									, temp
									);

							srd[kk].pData = temp;
							srd[kk].RowPitch   = pitch;
							srd[kk].SlicePitch = slice;
							totalSize += slice;
						}

 						if (swizzle)
 						{
// 							imageSwizzleBgra8(width, height, mip.m_width*4, data, temp);
 						}

						srd[kk].SlicePitch = mip.m_height*srd[kk].RowPitch;
						++kk;
					}
					else
					{
						const uint32_t pitch = bx::strideAlign(width*bpp / 8, D3D12_TEXTURE_DATA_PITCH_ALIGNMENT);
						const uint32_t slice = bx::strideAlign(pitch * height, D3D12_TEXTURE_DATA_PLACEMENT_ALIGNMENT);
						totalSize += slice;
					}

					width  >>= 1;
					height >>= 1;
					depth  >>= 1;
				}
			}

			BX_TRACE("texture total size: %d", totalSize);

			const uint32_t msaaQuality = bx::uint32_satsub( (m_flags&BGFX_TEXTURE_RT_MSAA_MASK)>>BGFX_TEXTURE_RT_MSAA_SHIFT, 1);
			const DXGI_SAMPLE_DESC& msaa = s_msaa[msaaQuality];

			memset(&m_srvd, 0, sizeof(m_srvd) );
			m_srvd.Shader4ComponentMapping = D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING;
			m_srvd.Format = s_textureFormat[m_textureFormat].m_fmtSrv;
			DXGI_FORMAT format = s_textureFormat[m_textureFormat].m_fmt;
			if (swizzle)
			{
				format        = DXGI_FORMAT_R8G8B8A8_UNORM;
				m_srvd.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
			}

			m_uavd.Format = m_srvd.Format;

			ID3D12Device* device = s_renderD3D12->m_device;
			ID3D12GraphicsCommandList* commandList = s_renderD3D12->m_commandList;

			D3D12_RESOURCE_DESC resourceDesc;
			resourceDesc.Alignment  = 0;
			resourceDesc.Width      = textureWidth;
			resourceDesc.Height     = textureHeight;
			resourceDesc.MipLevels  = numMips;
			resourceDesc.Format     = format;
			resourceDesc.SampleDesc = msaa;
			resourceDesc.Layout     = D3D12_TEXTURE_LAYOUT_UNKNOWN;
			resourceDesc.Flags      = D3D12_RESOURCE_FLAG_NONE;
			resourceDesc.DepthOrArraySize = numSides;

			D3D12_RESOURCE_STATES state = D3D12_RESOURCE_STATE_PIXEL_SHADER_RESOURCE;

			D3D12_CLEAR_VALUE* clearValue = NULL;
			if (isDepth(TextureFormat::Enum(m_textureFormat) ) )
			{
				resourceDesc.Format = s_textureFormat[m_textureFormat].m_fmt;
				resourceDesc.Flags |= D3D12_RESOURCE_FLAG_ALLOW_DEPTH_STENCIL;
				state              |= D3D12_RESOURCE_STATE_DEPTH_WRITE;
				state              &= ~D3D12_RESOURCE_STATE_PIXEL_SHADER_RESOURCE;

				clearValue = (D3D12_CLEAR_VALUE*)alloca(sizeof(D3D12_CLEAR_VALUE) );
				clearValue->Format = s_textureFormat[m_textureFormat].m_fmtDsv;
				clearValue->DepthStencil.Depth   = 1.0f;
				clearValue->DepthStencil.Stencil = 0;
			}
			else if (renderTarget)
			{
				clearValue = (D3D12_CLEAR_VALUE*)alloca(sizeof(D3D12_CLEAR_VALUE) );
				clearValue->Format = resourceDesc.Format;
				clearValue->Color[0] = 0.0f;
				clearValue->Color[1] = 0.0f;
				clearValue->Color[2] = 0.0f;
				clearValue->Color[3] = 0.0f;

				resourceDesc.Flags |= D3D12_RESOURCE_FLAG_ALLOW_RENDER_TARGET;
			}

			if (bufferOnly)
			{
				resourceDesc.Flags |= D3D12_RESOURCE_FLAG_DENY_SHADER_RESOURCE;
				state              &= ~D3D12_RESOURCE_STATE_PIXEL_SHADER_RESOURCE;
			}

			if (computeWrite)
			{
				resourceDesc.Flags &= ~D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS;
			}

			switch (m_type)
			{
			case Texture2D:
				resourceDesc.Dimension = D3D12_RESOURCE_DIMENSION_TEXTURE2D;
				m_srvd.ViewDimension                 = 1 < msaa.Count ? D3D12_SRV_DIMENSION_TEXTURE2DMS : D3D12_SRV_DIMENSION_TEXTURE2D;
				m_srvd.Texture2D.MostDetailedMip     = 0;
				m_srvd.Texture2D.MipLevels           = numMips;
				m_srvd.Texture2D.ResourceMinLODClamp = 0.0f;

				m_uavd.ViewDimension        = D3D12_UAV_DIMENSION_TEXTURE2D;
				m_uavd.Texture2D.MipSlice   = 0;
				m_uavd.Texture2D.PlaneSlice = 0;
				break;

			case Texture3D:
				resourceDesc.Dimension = D3D12_RESOURCE_DIMENSION_TEXTURE3D;
				m_srvd.ViewDimension                 = D3D12_SRV_DIMENSION_TEXTURE3D;
				m_srvd.Texture3D.MostDetailedMip     = 0;
				m_srvd.Texture3D.MipLevels           = numMips;
				m_srvd.Texture3D.ResourceMinLODClamp = 0.0f;

				m_uavd.ViewDimension         = D3D12_UAV_DIMENSION_TEXTURE3D;
				m_uavd.Texture3D.MipSlice    = 0;
				m_uavd.Texture3D.FirstWSlice = 0;
				m_uavd.Texture3D.WSize       = 0;
				break;

			case TextureCube:
				resourceDesc.Dimension = D3D12_RESOURCE_DIMENSION_TEXTURE2D;
				m_srvd.ViewDimension                   = D3D12_SRV_DIMENSION_TEXTURECUBE;
				m_srvd.TextureCube.MostDetailedMip     = 0;
				m_srvd.TextureCube.MipLevels           = numMips;
				m_srvd.TextureCube.ResourceMinLODClamp = 0.0f;

				m_uavd.ViewDimension        = D3D12_UAV_DIMENSION_TEXTURE2D;
				m_uavd.Texture2D.MipSlice   = 0;
				m_uavd.Texture2D.PlaneSlice = 0;
				break;
			}

			m_ptr = createCommittedResource(device, HeapProperty::Default, &resourceDesc, clearValue);

			{
				uint64_t uploadBufferSize;
				uint32_t* numRows        = (uint32_t*)alloca(sizeof(uint32_t)*numSrd);
				uint64_t* rowSizeInBytes = (uint64_t*)alloca(sizeof(uint64_t)*numSrd);
				D3D12_PLACED_SUBRESOURCE_FOOTPRINT* layouts = (D3D12_PLACED_SUBRESOURCE_FOOTPRINT*)alloca(sizeof(D3D12_PLACED_SUBRESOURCE_FOOTPRINT)*numSrd);

				device->GetCopyableFootprints(&resourceDesc
					, 0
					, numSrd
					, 0
					, layouts
					, numRows
					, rowSizeInBytes
					, &uploadBufferSize
					);
				BX_WARN(uploadBufferSize == totalSize, "uploadBufferSize %d (totalSize %d), numRows %d, rowSizeInBytes %d"
					, uploadBufferSize
					, totalSize
					, numRows[0]
					, rowSizeInBytes[0]
					);
			}

			if (kk != 0)
			{
				ID3D12Resource* staging = createCommittedResource(s_renderD3D12->m_device, HeapProperty::Upload, totalSize);

				setState(commandList,D3D12_RESOURCE_STATE_COPY_DEST);

				uint64_t result = UpdateSubresources(commandList
					, m_ptr
					, staging
					, 0
					, 0
					, numSrd
					, srd
					);
				BX_CHECK(0 != result, "Invalid size"); BX_UNUSED(result);
				BX_TRACE("Update subresource %" PRId64, result);

				setState(commandList, state);

				s_renderD3D12->m_cmd.release(staging);
			}
			else
			{
				setState(commandList, state);
			}

			if (0 != kk)
			{
				kk = 0;
				for (uint8_t side = 0; side < numSides; ++side)
				{
					for (uint32_t lod = 0, num = numMips; lod < num; ++lod)
					{
						BX_FREE(g_allocator, const_cast<void*>(srd[kk].pData) );
						++kk;
					}
				}
			}
		}
	}

	void TextureD3D12::destroy()
	{
		if (NULL != m_ptr)
		{
			DX_RELEASE(m_ptr, 0);
			m_ptr = NULL;
		}
	}

	void TextureD3D12::update(ID3D12GraphicsCommandList* _commandList, uint8_t _side, uint8_t _mip, const Rect& _rect, uint16_t _z, uint16_t _depth, uint16_t _pitch, const Memory* _mem)
	{
		setState(_commandList, D3D12_RESOURCE_STATE_COPY_DEST);

		const uint32_t subres = _mip + (_side * m_numMips);
		const uint32_t bpp    = getBitsPerPixel(TextureFormat::Enum(m_textureFormat) );
		const uint32_t rectpitch = _rect.m_width*bpp/8;
		const uint32_t srcpitch  = UINT16_MAX == _pitch ? rectpitch : _pitch;

		D3D12_RESOURCE_DESC desc = m_ptr->GetDesc();

		desc.Height = _rect.m_height;

		uint32_t numRows;
		uint64_t rowPitch;
		uint64_t totalBytes;
		D3D12_PLACED_SUBRESOURCE_FOOTPRINT layout;
		s_renderD3D12->m_device->GetCopyableFootprints(&desc
			, subres
			, 1
			, 0
			, &layout
			, &numRows
			, &rowPitch
			, &totalBytes
			);

		ID3D12Resource* staging = createCommittedResource(s_renderD3D12->m_device, HeapProperty::Upload, totalBytes);

		uint8_t* data;

		DX_CHECK(staging->Map(0, NULL, (void**)&data) );
		for (uint32_t ii = 0, height = _rect.m_height; ii < height; ++ii)
		{
			memcpy(&data[ii*rowPitch], &_mem->data[ii*srcpitch], srcpitch);
		}
		staging->Unmap(0, NULL);

		D3D12_BOX box;
		box.left   = 0;
		box.top    = 0;
		box.right  = box.left + _rect.m_width;
		box.bottom = box.top  + _rect.m_height;
		box.front  = _z;
		box.back   = _z+_depth;

		D3D12_TEXTURE_COPY_LOCATION dst = { m_ptr,   D3D12_TEXTURE_COPY_TYPE_SUBRESOURCE_INDEX, { subres } };
		D3D12_TEXTURE_COPY_LOCATION src = { staging, D3D12_TEXTURE_COPY_TYPE_PLACED_FOOTPRINT,  layout     };
		_commandList->CopyTextureRegion(&dst, _rect.m_x, _rect.m_y, 0, &src, &box);

		setState(_commandList, D3D12_RESOURCE_STATE_PIXEL_SHADER_RESOURCE);

		s_renderD3D12->m_cmd.release(staging);
	}

	void TextureD3D12::commit(uint8_t _stage, uint32_t _flags)
	{
		BX_UNUSED(_stage, _flags);
	}

	void TextureD3D12::resolve()
	{
	}

	D3D12_RESOURCE_STATES TextureD3D12::setState(ID3D12GraphicsCommandList* _commandList, D3D12_RESOURCE_STATES _state)
	{
		if (m_state != _state)
		{
			setResourceBarrier(_commandList
				, m_ptr
				, m_state
				, _state
				);

			bx::xchg(m_state, _state);
		}

		return _state;
	}

	void FrameBufferD3D12::create(uint8_t _num, const TextureHandle* _handles)
	{
		m_numTh = _num;
		memcpy(m_th, _handles, _num*sizeof(TextureHandle) );

		postReset();
	}

	void FrameBufferD3D12::create(uint16_t /*_denseIdx*/, void* /*_nwh*/, uint32_t /*_width*/, uint32_t /*_height*/, TextureFormat::Enum /*_depthFormat*/)
	{
	}

	void FrameBufferD3D12::preReset()
	{
	}

	void FrameBufferD3D12::postReset()
	{
		if (m_numTh != 0)
		{
			ID3D12Device* device = s_renderD3D12->m_device;

			D3D12_CPU_DESCRIPTOR_HANDLE rtvDescriptor = s_renderD3D12->m_rtvDescriptorHeap->GetCPUDescriptorHandleForHeapStart();
			uint32_t rtvDescriptorSize = device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_RTV);
			uint32_t fbhIdx = (uint32_t)(this - s_renderD3D12->m_frameBuffers);
			rtvDescriptor.ptr += (BX_COUNTOF(s_renderD3D12->m_backBufferColor) + fbhIdx * BGFX_CONFIG_MAX_FRAME_BUFFER_ATTACHMENTS) * rtvDescriptorSize;

			m_depth.idx = bgfx::invalidHandle;
			m_num = 0;
			for (uint32_t ii = 0; ii < m_numTh; ++ii)
			{
				TextureHandle handle = m_th[ii];
				if (isValid(handle) )
				{
					const TextureD3D12& texture = s_renderD3D12->m_textures[handle.idx];
					if (isDepth( (TextureFormat::Enum)texture.m_textureFormat) )
					{
						BX_CHECK(!isValid(m_depth), "");
						m_depth = handle;
						D3D12_CPU_DESCRIPTOR_HANDLE dsvDescriptor = s_renderD3D12->m_dsvDescriptorHeap->GetCPUDescriptorHandleForHeapStart();
						uint32_t dsvDescriptorSize = device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_DSV);
						dsvDescriptor.ptr += (1 + fbhIdx) * dsvDescriptorSize;

						const ImageBlockInfo& blockInfo = getBlockInfo(TextureFormat::Enum(texture.m_textureFormat) );
						BX_UNUSED(blockInfo);

						D3D12_DEPTH_STENCIL_VIEW_DESC dsvDesc;
						ZeroMemory(&dsvDesc, sizeof(dsvDesc) );
						dsvDesc.Format        = s_textureFormat[texture.m_textureFormat].m_fmtDsv;
						dsvDesc.ViewDimension = D3D12_DSV_DIMENSION_TEXTURE2D;
						dsvDesc.Flags         = D3D12_DSV_FLAG_NONE
// 							| (blockInfo.depthBits   > 0 ? D3D12_DSV_FLAG_READ_ONLY_DEPTH   : D3D12_DSV_FLAG_NONE)
// 							| (blockInfo.stencilBits > 0 ? D3D12_DSV_FLAG_READ_ONLY_STENCIL : D3D12_DSV_FLAG_NONE)
							;

						device->CreateDepthStencilView(texture.m_ptr
							, &dsvDesc
							, dsvDescriptor
							);
					}
					else
					{
						m_texture[m_num] = handle;
						D3D12_CPU_DESCRIPTOR_HANDLE rtv = { rtvDescriptor.ptr + m_num * rtvDescriptorSize };
						device->CreateRenderTargetView(texture.m_ptr
							, NULL
							, rtv
							);
						m_num++;
					}
				}
			}
		}
	}

	uint16_t FrameBufferD3D12::destroy()
	{
		m_numTh = 0;

		m_depth.idx = bgfx::invalidHandle;

		uint16_t denseIdx = m_denseIdx;
		m_denseIdx = UINT16_MAX;

		return denseIdx;
	}

	void FrameBufferD3D12::resolve()
	{
	}

	void FrameBufferD3D12::clear(ID3D12GraphicsCommandList* _commandList, const Clear& _clear, const float _palette[][4], const D3D12_RECT* _rect, uint32_t _num)
	{
		ID3D12Device* device = s_renderD3D12->m_device;
		const uint32_t fbhIdx = (uint32_t)(this - s_renderD3D12->m_frameBuffers);

		if (BGFX_CLEAR_COLOR & _clear.m_flags
		&&  0 != m_num)
		{
			D3D12_CPU_DESCRIPTOR_HANDLE rtvDescriptor = s_renderD3D12->m_rtvDescriptorHeap->GetCPUDescriptorHandleForHeapStart();
			uint32_t rtvDescriptorSize = device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_RTV);
			rtvDescriptor.ptr += (BX_COUNTOF(s_renderD3D12->m_backBufferColor) + fbhIdx * BGFX_CONFIG_MAX_FRAME_BUFFER_ATTACHMENTS) * rtvDescriptorSize;

			if (BGFX_CLEAR_COLOR_USE_PALETTE & _clear.m_flags)
			{
				for (uint32_t ii = 0, num = m_num; ii < num; ++ii)
				{
					uint8_t index = _clear.m_index[ii];
					if (UINT8_MAX != index)
					{
						D3D12_CPU_DESCRIPTOR_HANDLE rtv = { rtvDescriptor.ptr + ii * rtvDescriptorSize };
						_commandList->ClearRenderTargetView(rtv
								, _palette[index]
								, _num
								, _rect
								);
					}
				}
			}
			else
			{
				float frgba[4] =
				{
					_clear.m_index[0]*1.0f/255.0f,
					_clear.m_index[1]*1.0f/255.0f,
					_clear.m_index[2]*1.0f/255.0f,
					_clear.m_index[3]*1.0f/255.0f,
				};
				for (uint32_t ii = 0, num = m_num; ii < num; ++ii)
				{
					D3D12_CPU_DESCRIPTOR_HANDLE rtv = { rtvDescriptor.ptr + ii * rtvDescriptorSize };
					_commandList->ClearRenderTargetView(rtv
						, frgba
						, _num
						, _rect
						);
				}
			}
		}

		if (isValid(m_depth)
		&& (BGFX_CLEAR_DEPTH|BGFX_CLEAR_STENCIL) & _clear.m_flags)
		{
			D3D12_CPU_DESCRIPTOR_HANDLE dsvDescriptor = s_renderD3D12->m_dsvDescriptorHeap->GetCPUDescriptorHandleForHeapStart();
			uint32_t dsvDescriptorSize = device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_DSV);
			dsvDescriptor.ptr += (1 + fbhIdx) * dsvDescriptorSize;

			DWORD flags = 0;
			flags |= (_clear.m_flags & BGFX_CLEAR_DEPTH)   ? D3D12_CLEAR_FLAG_DEPTH   : 0;
			flags |= (_clear.m_flags & BGFX_CLEAR_STENCIL) ? D3D12_CLEAR_FLAG_STENCIL : 0;

			_commandList->ClearDepthStencilView(dsvDescriptor
				, D3D12_CLEAR_FLAGS(flags)
				, _clear.m_depth
				, _clear.m_stencil
				, _num
				, _rect
				);
		}
	}

	void RendererContextD3D12::submit(Frame* _render, ClearQuad& _clearQuad, TextVideoMemBlitter& _textVideoMemBlitter)
	{
//		PIX_BEGINEVENT(D3DCOLOR_RGBA(0xff, 0x00, 0x00, 0xff), L"rendererSubmit");

		updateResolution(_render->m_resolution);

		int64_t elapsed = -bx::getHPCounter();
		int64_t captureElapsed = 0;

		if (0 < _render->m_iboffset)
		{
			TransientIndexBuffer* ib = _render->m_transientIb;
			m_indexBuffers[ib->handle.idx].update(m_commandList, 0, _render->m_iboffset, ib->data);
		}

		if (0 < _render->m_vboffset)
		{
			TransientVertexBuffer* vb = _render->m_transientVb;
			m_vertexBuffers[vb->handle.idx].update(m_commandList, 0, _render->m_vboffset, vb->data);
		}

		_render->sort();

		RenderDraw currentState;
		currentState.clear();
		currentState.m_flags = BGFX_STATE_NONE;
		currentState.m_stencil = packStencil(BGFX_STENCIL_NONE, BGFX_STENCIL_NONE);

		_render->m_hmdInitialized = false;

		const bool hmdEnabled = false;
		ViewState viewState(_render, hmdEnabled);
		viewState.reset(_render, hmdEnabled);

// 		bool wireframe = !!(_render->m_debug&BGFX_DEBUG_WIREFRAME);
// 		bool scissorEnabled = false;
// 		setDebugWireframe(wireframe);

		uint16_t programIdx = invalidHandle;
		uint16_t currentSamplerStateIdx = invalidHandle;
		uint32_t currentBindHash = 0;
		ID3D12PipelineState* currentPso = NULL;
		SortKey key;
		uint8_t view = 0xff;
		FrameBufferHandle fbh = BGFX_INVALID_HANDLE;
		float alphaRef = 0.0f;
		uint32_t blendFactor = 0;

		const uint64_t pt = _render->m_debug&BGFX_DEBUG_WIREFRAME ? BGFX_STATE_PT_LINES : 0;
		uint8_t primIndex = uint8_t(pt >> BGFX_STATE_PT_SHIFT);
		PrimInfo prim = s_primInfo[primIndex];

		bool wasCompute = false;
		bool viewHasScissor = false;
		Rect viewScissorRect;
		viewScissorRect.clear();

		BX_UNUSED(alphaRef);

		uint32_t statsNumPrimsSubmitted[BX_COUNTOF(s_primInfo)] = {};
		uint32_t statsNumPrimsRendered[BX_COUNTOF(s_primInfo)] = {};
		uint32_t statsNumInstances[BX_COUNTOF(s_primInfo)] = {};
		uint32_t statsNumIndices = 0;
		uint32_t statsKeyType[2] = {};

		m_backBufferColorIdx = m_swapChain->GetCurrentBackBufferIndex();

		const uint64_t f0 = BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_FACTOR, BGFX_STATE_BLEND_FACTOR);
		const uint64_t f1 = BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_INV_FACTOR, BGFX_STATE_BLEND_INV_FACTOR);

		D3D12_GPU_DESCRIPTOR_HANDLE gpuHandle;
		ScratchBufferD3D12& scratchBuffer = m_scratchBuffer[m_backBufferColorIdx];
		scratchBuffer.reset(gpuHandle);

		D3D12_GPU_VIRTUAL_ADDRESS gpuAddress = {};
		StateCacheLru<D3D12_GPU_DESCRIPTOR_HANDLE, 64> bindLru;

		setResourceBarrier(m_commandList
			, m_backBufferColor[m_backBufferColorIdx]
			, D3D12_RESOURCE_STATE_PRESENT
			, D3D12_RESOURCE_STATE_RENDER_TARGET
			);

		if (0 == (_render->m_debug&BGFX_DEBUG_IFH) )
		{
// 			uint8_t eye = 0;
// 			uint8_t restartState = 0;
			viewState.m_rect = _render->m_rect[0];

			int32_t numItems = _render->m_num;
			for (int32_t item = 0, restartItem = numItems; item < numItems || restartItem < numItems;)
			{
				const bool isCompute = key.decode(_render->m_sortKeys[item], _render->m_viewRemap);
				statsKeyType[isCompute]++;

				const bool viewChanged = 0
					|| key.m_view != view
					|| item == numItems
					;

				const RenderItem& renderItem = _render->m_renderItem[_render->m_sortValues[item] ];
				++item;

				if (viewChanged)
				{
					kick();

					if (isCompute)
					{
						m_commandList->SetComputeRootSignature(m_rootSignature);
					}
					else
					{
						m_commandList->SetGraphicsRootSignature(m_rootSignature);
					}

					ID3D12DescriptorHeap* heaps[] = {
						m_samplerAllocator.getHeap(),
						scratchBuffer.getHeap(),
					};
					m_commandList->SetDescriptorHeaps(BX_COUNTOF(heaps), heaps);

					view = key.m_view;
					programIdx = invalidHandle;
					currentPso = NULL;

					fbh = _render->m_fb[view];
					setFrameBuffer(fbh);

					viewState.m_rect = _render->m_rect[view];
					const Rect& rect        = _render->m_rect[view];
					const Rect& scissorRect = _render->m_scissor[view];
					viewHasScissor  = !scissorRect.isZero();
					viewScissorRect = viewHasScissor ? scissorRect : rect;

					D3D12_VIEWPORT vp;
					vp.TopLeftX = rect.m_x;
					vp.TopLeftY = rect.m_y;
					vp.Width    = rect.m_width;
					vp.Height   = rect.m_height;
					vp.MinDepth = 0.0f;
					vp.MaxDepth = 1.0f;
					m_commandList->RSSetViewports(1, &vp);

					D3D12_RECT rc;
					rc.left   = viewScissorRect.m_x;
					rc.top    = viewScissorRect.m_y;
					rc.right  = viewScissorRect.m_x + viewScissorRect.m_width;
					rc.bottom = viewScissorRect.m_y + viewScissorRect.m_height;
					m_commandList->RSSetScissorRects(1, &rc);

					Clear& clear = _render->m_clear[view];
					if (BGFX_CLEAR_NONE != clear.m_flags)
					{
						Rect clearRect = rect;
						clearRect.intersect(rect, viewScissorRect);
						clearQuad(_clearQuad, clearRect, clear, _render->m_clearColor);
					}

					prim = s_primInfo[BX_COUNTOF(s_primName)]; // Force primitive type update.
				}

				if (isCompute)
				{
					if (!wasCompute)
					{
						wasCompute = true;
					}
					const RenderCompute& compute = renderItem.compute;

					bool programChanged = false;
					bool constantsChanged = compute.m_constBegin < compute.m_constEnd;
					rendererUpdateUniforms(this, _render->m_constantBuffer, compute.m_constBegin, compute.m_constEnd);

					if (key.m_program != programIdx)
					{
						programIdx = key.m_program;

						ProgramD3D12& program = m_program[key.m_program];
						m_currentProgram = &program;

						programChanged =
							constantsChanged = true;
					}

					if (invalidHandle != programIdx)
					{
						ProgramD3D12& program = m_program[programIdx];

						if (constantsChanged)
						{
							ConstantBuffer* vcb = program.m_vsh->m_constantBuffer;
							if (NULL != vcb)
							{
								commit(*vcb);
							}
						}

						viewState.setPredefined<4>(this, view, 0, program, _render, compute);

						if (constantsChanged
						||  program.m_numPredefined > 0)
						{
							commitShaderConstants(gpuAddress);
						}
					}

					if (programChanged)
					{
						ID3D12PipelineState* pso = getPipelineState(programIdx);
						m_commandList->SetPipelineState(pso);
					}

					D3D12_GPU_DESCRIPTOR_HANDLE srvHandle[BGFX_MAX_COMPUTE_BINDINGS] = {};
					uint32_t samplerFlags[BGFX_MAX_COMPUTE_BINDINGS] = {};

					for (uint32_t ii = 0; ii < BGFX_MAX_COMPUTE_BINDINGS; ++ii)
					{
						const Binding& bind = compute.m_bind[ii];
						if (invalidHandle != bind.m_idx)
						{
							switch (bind.m_type)
							{
							case Binding::Image:
								{
									TextureD3D12& texture = m_textures[bind.m_idx];

									if (Access::Read != bind.m_un.m_compute.m_access)
									{
										scratchBuffer.allocUav(srvHandle[ii], texture, bind.m_un.m_compute.m_mip);
									}
									else
									{
										scratchBuffer.alloc(srvHandle[ii], texture);
									}
								}
								break;

							case Binding::IndexBuffer:
							case Binding::VertexBuffer:
								{
									BufferD3D12& buffer = Binding::IndexBuffer == bind.m_type
										? m_indexBuffers[bind.m_idx]
										: m_vertexBuffers[bind.m_idx]
										;

									if (Access::Read != bind.m_un.m_compute.m_access)
									{
										scratchBuffer.allocUav(srvHandle[ii], buffer);
									}
									else
									{
										scratchBuffer.alloc(srvHandle[ii], buffer);
									}
								}
								break;
							}
						}
					}

					uint16_t samplerStateIdx = getSamplerState(samplerFlags, BGFX_MAX_COMPUTE_BINDINGS);
					m_commandList->SetComputeRootDescriptorTable(Rdt::Sampler, m_samplerAllocator.get(samplerStateIdx));
					m_commandList->SetComputeRootDescriptorTable(Rdt::SRV, srvHandle[0]);
					m_commandList->SetComputeRootConstantBufferView(Rdt::CBV, gpuAddress);
					m_commandList->SetComputeRootDescriptorTable(Rdt::UAV, srvHandle[0]);

					if (isValid(compute.m_indirectBuffer) )
					{
						const VertexBufferD3D12& vb = m_vertexBuffers[compute.m_indirectBuffer.idx];

						uint32_t numDrawIndirect = UINT16_MAX == compute.m_numIndirect
							? vb.m_size/BGFX_CONFIG_DRAW_INDIRECT_STRIDE
							: compute.m_numIndirect
							;

						uint32_t args = compute.m_startIndirect * BGFX_CONFIG_DRAW_INDIRECT_STRIDE;
						for (uint32_t ii = 0; ii < numDrawIndirect; ++ii)
						{
//							deviceCtx->DispatchIndirect(ptr, args);
							args += BGFX_CONFIG_DRAW_INDIRECT_STRIDE;
						}
					}
					else
					{
						m_commandList->Dispatch(compute.m_numX, compute.m_numY, compute.m_numZ);
					}

					continue;
				}

				bool resetState = viewChanged || wasCompute;

				if (wasCompute)
				{
					if (BX_ENABLED(BGFX_CONFIG_DEBUG_PIX) )
					{
// 						wchar_t* viewNameW = s_viewNameW[view];
// 						viewNameW[3] = L' ';
// 						PIX_ENDEVENT();
// 						PIX_BEGINEVENT(D3DCOLOR_RGBA(0xff, 0x00, 0x00, 0xff), viewNameW);
					}

					wasCompute = false;

					programIdx = invalidHandle;
					m_currentProgram = NULL;
					currentSamplerStateIdx = invalidHandle;

					m_commandList->SetGraphicsRootSignature(m_rootSignature);
					ID3D12DescriptorHeap* heaps[] = {
						m_samplerAllocator.getHeap(),
						scratchBuffer.getHeap(),
					};
					m_commandList->SetDescriptorHeaps(BX_COUNTOF(heaps), heaps);

//					invalidateCompute();
				}

				const RenderDraw& draw = renderItem.draw;

				const uint64_t newFlags = draw.m_flags;
				uint64_t changedFlags = currentState.m_flags ^ draw.m_flags;
				currentState.m_flags = newFlags;

				const uint64_t newStencil = draw.m_stencil;
				uint64_t changedStencil = (currentState.m_stencil ^ draw.m_stencil) & BGFX_STENCIL_FUNC_REF_MASK;
				currentState.m_stencil = newStencil;

				if (resetState)
				{
					currentState.clear();
					currentState.m_scissor = !draw.m_scissor;
					changedFlags = BGFX_STATE_MASK;
					changedStencil = packStencil(BGFX_STENCIL_MASK, BGFX_STENCIL_MASK);
					currentState.m_flags = newFlags;
					currentState.m_stencil = newStencil;

					const uint64_t pt = newFlags&BGFX_STATE_PT_MASK;
					primIndex = uint8_t(pt>>BGFX_STATE_PT_SHIFT);
				}

				bool constantsChanged = draw.m_constBegin < draw.m_constEnd;
				rendererUpdateUniforms(this, _render->m_constantBuffer, draw.m_constBegin, draw.m_constEnd);

				if (0 != changedStencil)
				{
					const uint32_t fstencil = unpackStencil(0, draw.m_stencil);
					const uint32_t ref = (fstencil&BGFX_STENCIL_FUNC_REF_MASK)>>BGFX_STENCIL_FUNC_REF_SHIFT;
					m_commandList->OMSetStencilRef(ref);
				}

				const uint64_t state = draw.m_flags;
				bool hasFactor = 0
					|| f0 == (state & f0)
					|| f1 == (state & f1)
					;

				if (hasFactor
				&&  blendFactor != draw.m_rgba)
				{
					blendFactor = draw.m_rgba;

					float blendFactor[4] = { 1.0f, 1.0f, 1.0f, 1.0f };
					blendFactor[0] = ( (draw.m_rgba>>24)     )/255.0f;
					blendFactor[1] = ( (draw.m_rgba>>16)&0xff)/255.0f;
					blendFactor[2] = ( (draw.m_rgba>> 8)&0xff)/255.0f;
					blendFactor[3] = ( (draw.m_rgba    )&0xff)/255.0f;
					m_commandList->OMSetBlendFactor(blendFactor);
				}

				if (BGFX_STATE_PT_MASK & changedFlags)
				{
					const uint64_t pt = draw.m_flags&BGFX_STATE_PT_MASK;
					primIndex = uint8_t(pt >> BGFX_STATE_PT_SHIFT);
					if (prim.m_toplogy != s_primInfo[primIndex].m_toplogy)
					{
						prim = s_primInfo[primIndex];
						m_commandList->IASetPrimitiveTopology(prim.m_toplogy);
					}
				}

				if (isValid(draw.m_vertexBuffer) )
				{
					bool programChanged = false;

					if (key.m_program != programIdx)
					{
						programIdx = key.m_program;

						if (invalidHandle == programIdx)
						{
							m_currentProgram = NULL;
						}
						else
						{
							ProgramD3D12& program = m_program[programIdx];
							m_currentProgram = &program;
						}

						programChanged =
							constantsChanged = true;
					}

					if (invalidHandle != programIdx)
					{
						ProgramD3D12& program = m_program[programIdx];

						if (constantsChanged)
						{
							ConstantBuffer* vcb = program.m_vsh->m_constantBuffer;
							if (NULL != vcb)
							{
								commit(*vcb);
							}

							ConstantBuffer* fcb = program.m_fsh->m_constantBuffer;
							if (NULL != fcb)
							{
								commit(*fcb);
							}
						}

						viewState.setPredefined<4>(this, view, 0, program, _render, draw);

						constantsChanged |= program.m_numPredefined > 0;

						if (constantsChanged)
						{
							commitShaderConstants(gpuAddress);
						}
					}

					const VertexBufferD3D12& vb = m_vertexBuffers[draw.m_vertexBuffer.idx];
					uint16_t declIdx = !isValid(vb.m_decl) ? draw.m_vertexDecl.idx : vb.m_decl.idx;
					const VertexDecl& vertexDecl = m_vertexDecls[declIdx];

					ID3D12PipelineState* pso =
						getPipelineState(state
							, draw.m_stencil
							, declIdx
							, programIdx
							, draw.m_instanceDataStride/16
							);
					if (pso != currentPso)
					{
						currentPso = pso;
						m_commandList->SetPipelineState(pso);
						currentBindHash = 0;
					}

					for (uint32_t bindHash = bx::hashMurmur2A(draw.m_bind, sizeof(draw.m_bind) )
						; currentBindHash != bindHash
						; currentBindHash  = bindHash
						)
					{
						D3D12_GPU_DESCRIPTOR_HANDLE* srv = bindLru.find(bindHash);
						if (NULL == srv)
						{
							D3D12_GPU_DESCRIPTOR_HANDLE srvHandle[BGFX_CONFIG_MAX_TEXTURE_SAMPLERS];
							uint32_t samplerFlags[BGFX_CONFIG_MAX_TEXTURE_SAMPLERS];
							{
								srvHandle[0].ptr = 0;
								for (uint32_t stage = 0; stage < BGFX_CONFIG_MAX_TEXTURE_SAMPLERS; ++stage)
								{
									const Binding& sampler = draw.m_bind[stage];
									if (invalidHandle != sampler.m_idx)
									{
										TextureD3D12& texture = m_textures[sampler.m_idx];
										scratchBuffer.alloc(srvHandle[stage], texture);
										samplerFlags[stage] = (0 == (BGFX_SAMPLER_DEFAULT_FLAGS & sampler.m_un.m_draw.m_flags)
											? sampler.m_un.m_draw.m_flags
											: texture.m_flags
											) & BGFX_TEXTURE_SAMPLER_BITS_MASK
											;
									}
									else
									{
										memcpy(&srvHandle[stage], &srvHandle[0], sizeof(D3D12_GPU_DESCRIPTOR_HANDLE) );
										samplerFlags[stage] = 0;
									}
								}
							}

							if (srvHandle[0].ptr != 0)
							{
								uint16_t samplerStateIdx = getSamplerState(samplerFlags);
								if (samplerStateIdx != currentSamplerStateIdx)
								{
									currentSamplerStateIdx = samplerStateIdx;
									m_commandList->SetGraphicsRootDescriptorTable(Rdt::Sampler, m_samplerAllocator.get(samplerStateIdx) );
								}

								m_commandList->SetGraphicsRootDescriptorTable(Rdt::SRV, srvHandle[0]);

								bindLru.add(bindHash, srvHandle[0]);
							}
						}
						else 
						{
							m_commandList->SetGraphicsRootDescriptorTable(Rdt::SRV, *srv);
						}
					}

					if (constantsChanged)
					{
						m_commandList->SetGraphicsRootConstantBufferView(Rdt::CBV, gpuAddress);
					}

					uint32_t numVertices = draw.m_numVertices;
					if (UINT32_MAX == numVertices)
					{
						numVertices = vb.m_size / vertexDecl.m_stride;
					}

					if (currentState.m_vertexDecl.idx         != draw.m_vertexDecl.idx
					||  currentState.m_vertexBuffer.idx       != draw.m_vertexBuffer.idx
					||  currentState.m_instanceDataBuffer.idx != draw.m_instanceDataBuffer.idx
					||  currentState.m_instanceDataOffset     != draw.m_instanceDataOffset
					||  currentState.m_instanceDataStride     != draw.m_instanceDataStride)
					{
						currentState.m_vertexDecl              = draw.m_vertexDecl;
						currentState.m_vertexBuffer            = draw.m_vertexBuffer;
						currentState.m_instanceDataBuffer.idx  = draw.m_instanceDataBuffer.idx;
						currentState.m_instanceDataOffset      = draw.m_instanceDataOffset;
						currentState.m_instanceDataStride      = draw.m_instanceDataStride;

						D3D12_VERTEX_BUFFER_VIEW vbView[2];
						uint32_t numVertexBuffers = 1;
						vbView[0].BufferLocation = vb.m_gpuVA;
						vbView[0].StrideInBytes  = vertexDecl.m_stride;
						vbView[0].SizeInBytes    = vb.m_size;

						if (isValid(draw.m_instanceDataBuffer) )
						{
							const VertexBufferD3D12& inst = m_vertexBuffers[draw.m_instanceDataBuffer.idx];
							vbView[1].BufferLocation = inst.m_gpuVA + draw.m_instanceDataOffset;
							vbView[1].StrideInBytes  = draw.m_instanceDataStride;
							vbView[1].SizeInBytes    = draw.m_numInstances * draw.m_instanceDataStride;
							++numVertexBuffers;
						}

						m_commandList->IASetVertexBuffers(0, numVertexBuffers, vbView);
					}

					uint32_t numIndices        = 0;
					uint32_t numPrimsSubmitted = 0;
					uint32_t numInstances      = 0;
					uint32_t numPrimsRendered  = 0;

					if (isValid(draw.m_indexBuffer) )
					{
						const BufferD3D12& ib = m_indexBuffers[draw.m_indexBuffer.idx];
						const bool hasIndex16 = 0 == (ib.m_flags & BGFX_BUFFER_INDEX32);

						if (currentState.m_indexBuffer.idx != draw.m_indexBuffer.idx)
						{
							currentState.m_indexBuffer = draw.m_indexBuffer;

							D3D12_INDEX_BUFFER_VIEW ibv;
							ibv.Format = hasIndex16
								? DXGI_FORMAT_R16_UINT
								: DXGI_FORMAT_R32_UINT
								;
							ibv.BufferLocation = ib.m_gpuVA;
							ibv.SizeInBytes    = ib.m_size;
							m_commandList->IASetIndexBuffer(&ibv);
						}

						if (UINT32_MAX == draw.m_numIndices)
						{
							const uint32_t indexSize = hasIndex16 ? 2 : 4;
							numIndices        = ib.m_size / indexSize;
							numPrimsSubmitted = numIndices / prim.m_div - prim.m_sub;
							numInstances      = draw.m_numInstances;
							numPrimsRendered  = numPrimsSubmitted*draw.m_numInstances;

							m_commandList->DrawIndexedInstanced(numIndices
								, draw.m_numInstances
								, draw.m_startIndex
								, draw.m_startVertex
								, 0
								);
						}
						else if (prim.m_min <= draw.m_numIndices)
						{
							numIndices        = draw.m_numIndices;
							numPrimsSubmitted = numIndices / prim.m_div - prim.m_sub;
							numInstances      = draw.m_numInstances;
							numPrimsRendered  = numPrimsSubmitted*draw.m_numInstances;

							m_commandList->DrawIndexedInstanced(numIndices
								, draw.m_numInstances
								, draw.m_startIndex
								, draw.m_startVertex
								, 0
								);
						}
					}
					else
					{
						numPrimsSubmitted = numVertices / prim.m_div - prim.m_sub;
						numInstances      = draw.m_numInstances;
						numPrimsRendered  = numPrimsSubmitted*draw.m_numInstances;

						m_commandList->DrawInstanced(numVertices
							, draw.m_numInstances
							, draw.m_startVertex
							, 0
							);
					}

					statsNumPrimsSubmitted[primIndex] += numPrimsSubmitted;
					statsNumPrimsRendered[primIndex]  += numPrimsRendered;
					statsNumInstances[primIndex]      += numInstances;
					statsNumIndices                   += numIndices;
				}
			}
		}

		int64_t now = bx::getHPCounter();
		elapsed += now;

		static int64_t last = now;
		int64_t frameTime = now - last;
		last = now;

		static int64_t min = frameTime;
		static int64_t max = frameTime;
		min = bx::int64_min(min, frameTime);
		max = bx::int64_max(max, frameTime);

		static int64_t presentMin = m_presentElapsed;
		static int64_t presentMax = m_presentElapsed;
		presentMin = bx::int64_min(presentMin, m_presentElapsed);
		presentMax = bx::int64_max(presentMax, m_presentElapsed);

		if (_render->m_debug & (BGFX_DEBUG_IFH | BGFX_DEBUG_STATS) )
		{
//			PIX_BEGINEVENT(D3DCOLOR_RGBA(0x40, 0x40, 0x40, 0xff), L"debugstats");

			TextVideoMem& tvm = m_textVideoMem;

			static int64_t next = now;

			if (now >= next)
			{
				next = now + bx::getHPFrequency();
				double freq = double(bx::getHPFrequency() );
				double toMs = 1000.0 / freq;

				tvm.clear();
				uint16_t pos = 0;
				tvm.printf(0, pos++, BGFX_CONFIG_DEBUG ? 0x89 : 0x8f
					, " %s / " BX_COMPILER_NAME " / " BX_CPU_NAME " / " BX_ARCH_NAME " / " BX_PLATFORM_NAME " "
					, getRendererName()
					);

				const DXGI_ADAPTER_DESC& desc = m_adapterDesc;
				char description[BX_COUNTOF(desc.Description)];
				wcstombs(description, desc.Description, BX_COUNTOF(desc.Description) );
				tvm.printf(0, pos++, 0x0f, " Device: %s", description);

				char dedicatedVideo[16];
				bx::prettify(dedicatedVideo, BX_COUNTOF(dedicatedVideo), desc.DedicatedVideoMemory);

				char dedicatedSystem[16];
				bx::prettify(dedicatedSystem, BX_COUNTOF(dedicatedSystem), desc.DedicatedSystemMemory);

				char sharedSystem[16];
				bx::prettify(sharedSystem, BX_COUNTOF(sharedSystem), desc.SharedSystemMemory);

				tvm.printf(0, pos++, 0x0f, " Memory: %s (video), %s (system), %s (shared)"
					, dedicatedVideo
					, dedicatedSystem
					, sharedSystem
					);

				pos = 10;
				tvm.printf(10, pos++, 0x8e, "       Frame: % 7.3f, % 7.3f \x1f, % 7.3f \x1e [ms] / % 6.2f FPS"
					, double(frameTime)*toMs
					, double(min)*toMs
					, double(max)*toMs
					, freq/frameTime
					);
				tvm.printf(10, pos++, 0x8e, "     Present: % 7.3f, % 7.3f \x1f, % 7.3f \x1e [ms]"
					, double(m_presentElapsed)*toMs
					, double(presentMin)*toMs
					, double(presentMax)*toMs
					);

				char hmd[16];
				bx::snprintf(hmd, BX_COUNTOF(hmd), ", [%c] HMD ", hmdEnabled ? '\xfe' : ' ');

				const uint32_t msaa = (m_resolution.m_flags&BGFX_RESET_MSAA_MASK)>>BGFX_RESET_MSAA_SHIFT;
				tvm.printf(10, pos++, 0x8e, " Reset flags: [%c] vsync, [%c] MSAAx%d%s, [%c] MaxAnisotropy "
					, !!(m_resolution.m_flags&BGFX_RESET_VSYNC) ? '\xfe' : ' '
					, 0 != msaa ? '\xfe' : ' '
					, 1<<msaa
					, ", no-HMD "
					, !!(m_resolution.m_flags&BGFX_RESET_MAXANISOTROPY) ? '\xfe' : ' '
					);

				double elapsedCpuMs = double(elapsed)*toMs;
				tvm.printf(10, pos++, 0x8e, "   Submitted: %4d (draw %4d, compute %4d) / CPU %3.4f [ms]"
					, _render->m_num
					, statsKeyType[0]
					, statsKeyType[1]
					, elapsedCpuMs
					);

				for (uint32_t ii = 0; ii < BX_COUNTOF(s_primName); ++ii)
				{
					tvm.printf(10, pos++, 0x8e, "   %9s: %7d (#inst: %5d), submitted: %7d"
						, s_primName[ii]
						, statsNumPrimsRendered[ii]
						, statsNumInstances[ii]
						, statsNumPrimsSubmitted[ii]
						);
				}

// 				if (NULL != m_renderdocdll)
// 				{
// 					tvm.printf(tvm.m_width-27, 0, 0x1f, " [F11 - RenderDoc capture] ");
// 				}

				tvm.printf(10, pos++, 0x8e, "     Indices: %7d", statsNumIndices);
				tvm.printf(10, pos++, 0x8e, "    DVB size: %7d", _render->m_vboffset);
				tvm.printf(10, pos++, 0x8e, "    DIB size: %7d", _render->m_iboffset);

				pos++;
				tvm.printf(10, pos++, 0x8e, " State cache:                                ");
				tvm.printf(10, pos++, 0x8e, " PSO    | Sampler | Bind   | Queued          ");
				tvm.printf(10, pos++, 0x8e, " %6d |  %6d | %6d | %6d"
					, m_pipelineStateCache.getCount()
					, m_samplerStateCache.getCount()
					, bindLru.getCount()
					, m_cmd.m_control.available()
					);
				pos++;

				double captureMs = double(captureElapsed)*toMs;
				tvm.printf(10, pos++, 0x8e, "     Capture: %3.4f [ms]", captureMs);

				uint8_t attr[2] = { 0x89, 0x8a };
				uint8_t attrIndex = _render->m_waitSubmit < _render->m_waitRender;

				tvm.printf(10, pos++, attr[attrIndex&1], " Submit wait: %3.4f [ms]", _render->m_waitSubmit*toMs);
				tvm.printf(10, pos++, attr[(attrIndex+1)&1], " Render wait: %3.4f [ms]", _render->m_waitRender*toMs);

				min = frameTime;
				max = frameTime;
				presentMin = m_presentElapsed;
				presentMax = m_presentElapsed;
			}

			blit(this, _textVideoMemBlitter, tvm);

//			PIX_ENDEVENT();
		}
		else if (_render->m_debug & BGFX_DEBUG_TEXT)
		{
//			PIX_BEGINEVENT(D3DCOLOR_RGBA(0x40, 0x40, 0x40, 0xff), L"debugtext");

			blit(this, _textVideoMemBlitter, _render->m_textVideoMem);

//			PIX_ENDEVENT();
		}

		setResourceBarrier(m_commandList
			, m_backBufferColor[m_backBufferColorIdx]
			, D3D12_RESOURCE_STATE_RENDER_TARGET
			, D3D12_RESOURCE_STATE_PRESENT
			);
		m_backBufferColorFence[m_backBufferColorIdx] = kick();
	}
} /* namespace d3d12 */ } // namespace bgfx

#else

namespace bgfx { namespace d3d12
{
	RendererContextI* rendererCreate()
	{
		return NULL;
	}

	void rendererDestroy()
	{
	}
} /* namespace d3d12 */ } // namespace bgfx

#endif // BGFX_CONFIG_RENDERER_DIRECT3D12