/* Refresh - XNA-inspired 3D Graphics Library with modern capabilities
 *
 * Copyright (c) 2020 Evan Hemsley
 *
 * This software is provided 'as-is', without any express or implied warranty.
 * In no event will the authors be held liable for any damages arising from
 * the use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you must not
 * claim that you wrote the original software. If you use this software in a
 * product, an acknowledgment in the product documentation would be
 * appreciated but is not required.
 *
 * 2. Altered source versions must be plainly marked as such, and must not be
 * misrepresented as being the original software.
 *
 * 3. This notice may not be removed or altered from any source distribution.
 *
 * Evan "cosmonaut" Hemsley <evan@moonside.games>
 *
 */

#if REFRESH_DRIVER_D3D11

#define D3D11_NO_HELPERS
#define CINTERFACE
#define COBJMACROS
#include <d3d11.h>
#include <dxgi.h>
#include <d3dcompiler.h>

#include "Refresh_Driver.h"
#include "Refresh_Driver_D3D11_cdefines.h"

#include <SDL.h>
#include <SDL_syswm.h>

 /* Defines */

#define D3D11_DLL "d3d11.dll"
#define DXGI_DLL "dxgi.dll"
#define WINDOW_SWAPCHAIN_DATA "Refresh_D3D11Swapchain"

#define NOT_IMPLEMENTED SDL_assert(0 && "Not implemented!");

/* Macros */

#define ERROR_CHECK(msg) \
	if (FAILED(res)) \
	{ \
		D3D11_INTERNAL_LogError(renderer->device, msg, res); \
	}

#define ERROR_CHECK_RETURN(msg, ret) \
	if (FAILED(res)) \
	{ \
		D3D11_INTERNAL_LogError(renderer->device, msg, res); \
		return ret; \
	}

/* D3DCompile signature */

typedef HRESULT(WINAPI *PFN_D3DCOMPILE)(
	LPCVOID pSrcData,
	SIZE_T SrcDataSize,
	LPCSTR pSourceName,
	const D3D_SHADER_MACRO* pDefines,
	ID3DInclude* pInclude,
	LPCSTR pEntrypoint,
	LPCSTR pTarget,
	UINT Flags1,
	UINT Flags2,
	ID3DBlob **ppCode,
	ID3DBlob **ppErrorMsgs
);

 /* Conversions */

static DXGI_FORMAT RefreshToD3D11_SurfaceFormat[] =
{
	DXGI_FORMAT_R8G8B8A8_UNORM,	/* R8G8B8A8 */
	DXGI_FORMAT_B8G8R8A8_UNORM,	/* B8G8R8A8 */
	DXGI_FORMAT_B5G6R5_UNORM,	/* R5G6B5 */
	DXGI_FORMAT_B5G5R5A1_UNORM,	/* A1R5G5B5 */
	DXGI_FORMAT_B4G4R4A4_UNORM,	/* B4G4R4A4 */
	DXGI_FORMAT_BC1_UNORM,		/* BC1 */
	DXGI_FORMAT_BC3_UNORM,		/* BC3 */
	DXGI_FORMAT_BC5_UNORM,		/* BC5 */
	DXGI_FORMAT_R8G8_SNORM,		/* R8G8_SNORM */
	DXGI_FORMAT_R8G8B8A8_SNORM,	/* R8G8B8A8_SNORM */
	DXGI_FORMAT_R10G10B10A2_UNORM,	/* A2R10G10B10 */
	DXGI_FORMAT_R16G16_UNORM,	/* R16G16 */
	DXGI_FORMAT_R16G16B16A16_UNORM,	/* R16G16B16A16 */
	DXGI_FORMAT_R8_UNORM,		/* R8 */
	DXGI_FORMAT_R32_FLOAT,		/* R32_SFLOAT */
	DXGI_FORMAT_R32G32_FLOAT,	/* R32G32_SFLOAT */
	DXGI_FORMAT_R32G32B32A32_FLOAT,	/* R32G32B32A32_SFLOAT */
	DXGI_FORMAT_R16_FLOAT,		/* R16_SFLOAT */
	DXGI_FORMAT_R16G16_FLOAT,	/* R16G16_SFLOAT */
	DXGI_FORMAT_R16G16B16A16_FLOAT,	/* R16G16B16A16_SFLOAT */
	DXGI_FORMAT_D16_UNORM,		/* D16 */
	DXGI_FORMAT_D32_FLOAT,		/* D32 */
	DXGI_FORMAT_D24_UNORM_S8_UINT,	/* D16S8 */
	DXGI_FORMAT_D32_FLOAT_S8X24_UINT/* D32S8 */
};

static DXGI_FORMAT RefreshToD3D11_VertexFormat[] =
{
	DXGI_FORMAT_R32_UINT,		/* UINT */
	DXGI_FORMAT_R32_FLOAT,		/* FLOAT */
	DXGI_FORMAT_R32G32_FLOAT,	/* VECTOR2 */
	DXGI_FORMAT_R32G32B32_FLOAT,	/* VECTOR3 */
	DXGI_FORMAT_R32G32B32A32_FLOAT,	/* VECTOR4 */
	DXGI_FORMAT_R8G8B8A8_UNORM,	/* COLOR */
	DXGI_FORMAT_R8G8B8A8_UINT,	/* BYTE4 */
	DXGI_FORMAT_R16G16_SINT,	/* SHORT2 */
	DXGI_FORMAT_R16G16B16A16_SINT,	/* SHORT4 */
	DXGI_FORMAT_R16G16_SNORM,	/* NORMALIZEDSHORT2 */
	DXGI_FORMAT_R16G16B16A16_SNORM,	/* NORMALIZEDSHORT4 */
	DXGI_FORMAT_R16G16_FLOAT,	/* HALFVECTOR2 */
	DXGI_FORMAT_R16G16B16A16_FLOAT	/* HALFVECTOR4 */
};

static DXGI_FORMAT RefreshToD3D11_IndexType[] =
{
	DXGI_FORMAT_R16_UINT,	/* 16BIT */
	DXGI_FORMAT_R32_UINT	/* 32BIT */
};

static D3D11_PRIMITIVE_TOPOLOGY RefreshToD3D11_PrimitiveType[] =
{
	D3D_PRIMITIVE_TOPOLOGY_POINTLIST,	/* POINTLIST */
	D3D_PRIMITIVE_TOPOLOGY_LINELIST,	/* LINELIST */
	D3D_PRIMITIVE_TOPOLOGY_LINESTRIP,	/* LINESTRIP */
	D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST,	/* TRIANGLELIST */
	D3D_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP	/* TRIANGLESTRIP */
};

static D3D11_FILL_MODE RefreshToD3D11_PolygonMode[] =
{
	D3D11_FILL_SOLID,	/* FILL */
	D3D11_FILL_WIREFRAME,	/* LINE */
};

static D3D11_CULL_MODE RefreshToD3D11_CullMode[] =
{
	D3D11_CULL_NONE,	/* NONE */
	D3D11_CULL_FRONT,	/* FRONT */
	D3D11_CULL_BACK		/* BACK */
};

static D3D11_BLEND RefreshToD3D11_BlendFactor[] =
{
	D3D11_BLEND_ZERO,		/* ZERO */
	D3D11_BLEND_ONE,		/* ONE */
	D3D11_BLEND_SRC_COLOR,		/* SRC_COLOR */
	D3D11_BLEND_INV_SRC_COLOR,	/* ONE_MINUS_SRC_COLOR */
	D3D11_BLEND_DEST_COLOR,		/* DST_COLOR */
	D3D11_BLEND_INV_DEST_COLOR,	/* ONE_MINUS_DST_COLOR */
	D3D11_BLEND_SRC_ALPHA,		/* SRC_ALPHA */
	D3D11_BLEND_INV_SRC_ALPHA,	/* ONE_MINUS_SRC_ALPHA */
	D3D11_BLEND_DEST_ALPHA,		/* DST_ALPHA */
	D3D11_BLEND_INV_DEST_ALPHA,	/* ONE_MINUS_DST_ALPHA */
	D3D11_BLEND_BLEND_FACTOR,	/* CONSTANT_COLOR */
	D3D11_BLEND_INV_BLEND_FACTOR,	/* ONE_MINUS_CONSTANT_COLOR */
	D3D11_BLEND_SRC_ALPHA_SAT,	/* SRC_ALPHA_SATURATE */
};

static D3D11_BLEND_OP RefreshToD3D11_BlendOp[] =
{
	D3D11_BLEND_OP_ADD,		/* ADD */
	D3D11_BLEND_OP_SUBTRACT,	/* SUBTRACT */
	D3D11_BLEND_OP_REV_SUBTRACT,	/* REVERSE_SUBTRACT */
	D3D11_BLEND_OP_MIN,		/* MIN */
	D3D11_BLEND_OP_MAX		/* MAX */
};

static D3D11_COMPARISON_FUNC RefreshToD3D11_CompareOp[] =
{
	D3D11_COMPARISON_NEVER,		/* NEVER */
	D3D11_COMPARISON_LESS,		/* LESS */
	D3D11_COMPARISON_EQUAL,		/* EQUAL */
	D3D11_COMPARISON_LESS_EQUAL,	/* LESS_OR_EQUAL */
	D3D11_COMPARISON_GREATER,	/* GREATER */
	D3D11_COMPARISON_NOT_EQUAL,	/* NOT_EQUAL */
	D3D11_COMPARISON_GREATER_EQUAL,	/* GREATER_OR_EQUAL */
	D3D11_COMPARISON_ALWAYS		/* ALWAYS */
};

static D3D11_STENCIL_OP RefreshToD3D11_StencilOp[] =
{
	D3D11_STENCIL_OP_KEEP,		/* KEEP */
	D3D11_STENCIL_OP_ZERO,		/* ZERO */
	D3D11_STENCIL_OP_REPLACE,	/* REPLACE */
	D3D11_STENCIL_OP_INCR_SAT,	/* INCREMENT_AND_CLAMP */
	D3D11_STENCIL_OP_DECR_SAT,	/* DECREMENT_AND_CLAMP */
	D3D11_STENCIL_OP_INVERT,	/* INVERT */
	D3D11_STENCIL_OP_INCR,		/* INCREMENT_AND_WRAP */
	D3D11_STENCIL_OP_DECR		/* DECREMENT_AND_WRAP */
};

static int32_t RefreshToD3D11_SampleCount[] =
{
	1,	/* 1 */
	2,	/* 2 */
	4,	/* 4 */
	8,	/* 8 */
	16,	/* 16 */
	32,	/* 32 */
	64	/* 64 */
};

static D3D11_INPUT_CLASSIFICATION RefreshToD3D11_VertexInputRate[] =
{
	D3D11_INPUT_PER_VERTEX_DATA,	/* VERTEX */
	D3D11_INPUT_PER_INSTANCE_DATA	/* INSTANCE */
};

static D3D11_TEXTURE_ADDRESS_MODE RefreshToD3D11_SamplerAddressMode[] =
{
	D3D11_TEXTURE_ADDRESS_WRAP,	/* REPEAT */
	D3D11_TEXTURE_ADDRESS_MIRROR,	/* MIRRORED_REPEAT */
	D3D11_TEXTURE_ADDRESS_CLAMP,	/* CLAMP_TO_EDGE */
	D3D11_TEXTURE_ADDRESS_BORDER	/* CLAMP_TO_BORDER */
};

/* Structs */

typedef struct D3D11Texture
{
	/* D3D Handles */
	ID3D11Resource *handle; /* ID3D11Texture2D* or ID3D11Texture3D* */
	ID3D11ShaderResourceView *shaderView;

	/* Basic Info */
	int32_t levelCount;
	uint8_t isRenderTarget;

	/* Dimensions */
	#define REFRESH_D3D11_RENDERTARGET_2D 0
	#define REFRESH_D3D11_RENDERTARGET_3D 1
	#define REFRESH_D3D11_RENDERTARGET_CUBE 2
	uint8_t rtType;
	REFRESHNAMELESS union
	{
		struct
		{
			int32_t width;
			int32_t height;
			ID3D11View *targetView;	/* ID3D11RenderTargetView* or ID3D11DepthStencilView* */
		} twod;
		struct
		{
			int32_t width;
			int32_t height;
			int32_t depth;
		} threed;
		struct
		{
			int32_t size;
			ID3D11RenderTargetView **rtViews;
		} cube;
	};
} D3D11Texture;

typedef struct D3D11Buffer
{
	ID3D11Buffer *handle;
} D3D11Buffer;

typedef struct D3D11SwapchainData
{
	IDXGISwapChain* swapchain;
	D3D11Texture refreshTexture;
	void* windowHandle;
} D3D11SwapchainData;

typedef struct D3D11CommandBuffer
{
	/* D3D11 Object References */
	ID3D11DeviceContext *context;
	ID3D11CommandList *commandList;
	D3D11SwapchainData *swapchainData;

	/* Render Pass */
	uint8_t numBoundColorAttachments;
	ID3D11RenderTargetView *rtViews[MAX_COLOR_TARGET_BINDINGS];
	ID3D11DepthStencilView* dsView;

	/* State */
	SDL_threadID threadID;
	uint8_t recording;
} D3D11CommandBuffer;

typedef struct D3D11CommandBufferPool
{
	D3D11CommandBuffer **elements;
	uint32_t count;
	uint32_t capacity;
} D3D11CommandBufferPool;

typedef struct D3D11ShaderModule
{
	ID3D11DeviceChild *shader; /* ID3D11VertexShader, ID3D11PixelShader, ID3D11ComputeShader */
	ID3D10Blob *blob;
	char *shaderSource;
	size_t shaderSourceLength;
} D3D11ShaderModule;

typedef struct D3D11GraphicsPipeline
{
	float blendConstants[4];

	int32_t numColorAttachments;
	int32_t colorAttachmentSampleCounts[MAX_COLOR_TARGET_BINDINGS];
	DXGI_FORMAT colorAttachmentFormats[MAX_COLOR_TARGET_BINDINGS];
	ID3D11BlendState *colorAttachmentBlendState;

	uint8_t hasDepthStencilAttachment;
	DXGI_FORMAT depthStencilAttachmentFormat;

	D3D11_PRIMITIVE_TOPOLOGY primitiveTopology;
	uint32_t stencilRef;
	ID3D11DepthStencilState *depthStencilState;
	ID3D11RasterizerState *rasterizerState;
	ID3D11InputLayout *inputLayout;

	Refresh_MultisampleState multisampleState;
	ID3D11VertexShader *vertexShader;
	ID3D11PixelShader *fragmentShader;
} D3D11GraphicsPipeline;

typedef struct D3D11Renderer
{
	ID3D11Device *device;
	ID3D11DeviceContext *immediateContext;
	IDXGIFactory1 *factory;
	IDXGIAdapter1* adapter;
	void *d3d11_dll;
	void *dxgi_dll;
	void *d3dcompiler_dll;
	SDL_mutex *contextLock;

	D3D11CommandBufferPool *commandBufferPool;
	SDL_mutex *commandBufferAcquisitionMutex;

	D3D11SwapchainData** swapchainDatas;
	uint32_t swapchainDataCount;
	uint32_t swapchainDataCapacity;

	Refresh_Vec4 blendFactor;

	uint8_t debugMode;
	D3D_FEATURE_LEVEL featureLevel;
	PFN_D3DCOMPILE D3DCompileFunc;
} D3D11Renderer;

/* Logging */

static void D3D11_INTERNAL_LogError(
	ID3D11Device *device,
	const char *msg,
	HRESULT res
) {
	#define MAX_ERROR_LEN 1024 /* FIXME: Arbitrary! */

	/* Buffer for text, ensure space for \0 terminator after buffer */
	char wszMsgBuff[MAX_ERROR_LEN + 1];
	DWORD dwChars; /* Number of chars returned. */

	if (res == DXGI_ERROR_DEVICE_REMOVED)
	{
		res = ID3D11Device_GetDeviceRemovedReason(device);
	}

	/* Try to get the message from the system errors. */
	dwChars = FormatMessage(
		FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
		NULL,
		res,
		0,
		wszMsgBuff,
		MAX_ERROR_LEN,
		NULL
	);

	/* No message? Screw it, just post the code. */
	if (dwChars == 0)
	{
		Refresh_LogError("%s! Error Code: 0x%08X", msg, res);
		return;
	}

	/* Ensure valid range */
	dwChars = SDL_min(dwChars, MAX_ERROR_LEN);

	/* Trim whitespace from tail of message */
	while (dwChars > 0)
	{
		if (wszMsgBuff[dwChars - 1] <= ' ')
		{
			dwChars--;
		}
		else
		{
			break;
		}
	}

	/* Ensure null-terminated string */
	wszMsgBuff[dwChars] = '\0';

	Refresh_LogError("%s! Error Code: %s (0x%08X)", msg, wszMsgBuff, res);
}

/* Quit */

static void D3D11_DestroyDevice(
	Refresh_Device *device
) {
	NOT_IMPLEMENTED
}

/* Drawing */

static void D3D11_DrawInstancedPrimitives(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	uint32_t baseVertex,
	uint32_t startIndex,
	uint32_t primitiveCount,
	uint32_t instanceCount,
	uint32_t vertexParamOffset,
	uint32_t fragmentParamOffset
) {
	NOT_IMPLEMENTED
}

static void D3D11_DrawIndexedPrimitives(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	uint32_t baseVertex,
	uint32_t startIndex,
	uint32_t primitiveCount,
	uint32_t vertexParamOffset,
	uint32_t fragmentParamOffset
) {
	NOT_IMPLEMENTED
}

static void D3D11_DrawPrimitives(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	uint32_t vertexStart,
	uint32_t primitiveCount,
	uint32_t vertexParamOffset,
	uint32_t fragmentParamOffset
) {
	NOT_IMPLEMENTED
}

static void D3D11_DrawPrimitivesIndirect(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	Refresh_Buffer *buffer,
	uint32_t offsetInBytes,
	uint32_t drawCount,
	uint32_t stride,
	uint32_t vertexParamOffset,
	uint32_t fragmentParamOffset
) {
	NOT_IMPLEMENTED
}

static void D3D11_DispatchCompute(
	Refresh_Renderer *device,
	Refresh_CommandBuffer *commandBuffer,
	uint32_t groupCountX,
	uint32_t groupCountY,
	uint32_t groupCountZ,
	uint32_t computeParamOffset
) {
	NOT_IMPLEMENTED
}

/* State Creation */


static Refresh_ComputePipeline* D3D11_CreateComputePipeline(
	Refresh_Renderer *driverData,
	Refresh_ComputeShaderInfo *computeShaderInfo
) {
	NOT_IMPLEMENTED
	return NULL;
}

static Refresh_GraphicsPipeline* D3D11_CreateGraphicsPipeline(
	Refresh_Renderer *driverData,
	Refresh_GraphicsPipelineCreateInfo *pipelineCreateInfo
) {
	NOT_IMPLEMENTED
	return NULL;
}

static Refresh_Sampler* D3D11_CreateSampler(
	Refresh_Renderer *driverData,
	Refresh_SamplerStateCreateInfo *samplerStateCreateInfo
) {
	NOT_IMPLEMENTED
	return NULL;
}

static Refresh_ShaderModule* D3D11_CreateShaderModule(
	Refresh_Renderer *driverData,
	Refresh_ShaderModuleCreateInfo *shaderModuleCreateInfo
) {
	NOT_IMPLEMENTED
	return NULL;
}

static Refresh_Texture* D3D11_CreateTexture(
	Refresh_Renderer *driverData,
	Refresh_TextureCreateInfo *textureCreateInfo
) {
	NOT_IMPLEMENTED
	return NULL;
}

static Refresh_Buffer* D3D11_CreateBuffer(
	Refresh_Renderer *driverData,
	Refresh_BufferUsageFlags usageFlags,
	uint32_t sizeInBytes
) {
	NOT_IMPLEMENTED
	return NULL;
}

/* Setters */

static void D3D11_SetTextureData(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	Refresh_TextureSlice *textureSlice,
	void *data,
	uint32_t dataLengthInBytes
) {
	NOT_IMPLEMENTED
}

static void D3D11_SetTextureDataYUV(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer* commandBuffer,
	Refresh_Texture *y,
	Refresh_Texture *u,
	Refresh_Texture *v,
	uint32_t yWidth,
	uint32_t yHeight,
	uint32_t uvWidth,
	uint32_t uvHeight,
	void *yDataPtr,
	void *uDataPtr,
	void *vDataPtr,
	uint32_t yDataLength,
	uint32_t uvDataLength,
	uint32_t yStride,
	uint32_t uvStride
) {
	NOT_IMPLEMENTED
}

static void D3D11_CopyTextureToTexture(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	Refresh_TextureSlice *sourceTextureSlice,
	Refresh_TextureSlice *destinationTextureSlice,
	Refresh_Filter filter
) {
	NOT_IMPLEMENTED
}

static void D3D11_CopyTextureToBuffer(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	Refresh_TextureSlice *textureSlice,
	Refresh_Buffer *buffer
) {
	NOT_IMPLEMENTED
}

static void D3D11_SetBufferData(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	Refresh_Buffer *buffer,
	uint32_t offsetInBytes,
	void* data,
	uint32_t dataLength
) {
	NOT_IMPLEMENTED
}

static uint32_t D3D11_PushVertexShaderUniforms(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	void *data,
	uint32_t dataLengthInBytes
) {
	NOT_IMPLEMENTED
	return 0;
}

static uint32_t D3D11_PushFragmentShaderUniforms(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	void *data,
	uint32_t dataLengthInBytes
) {
	NOT_IMPLEMENTED
	return 0;
}

static uint32_t D3D11_PushComputeShaderUniforms(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	void *data,
	uint32_t dataLengthInBytes
) {
	NOT_IMPLEMENTED
	return 0;
}

static void D3D11_BindVertexSamplers(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	Refresh_Texture **pTextures,
	Refresh_Sampler **pSamplers
) {
	NOT_IMPLEMENTED
}

static void D3D11_BindFragmentSamplers(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	Refresh_Texture **pTextures,
	Refresh_Sampler **pSamplers
) {
	NOT_IMPLEMENTED
}

/* Getters */

static void D3D11_GetBufferData(
	Refresh_Renderer *driverData,
	Refresh_Buffer *buffer,
	void *data,
	uint32_t dataLengthInBytes
) {
	NOT_IMPLEMENTED
}

/* Disposal */

static void D3D11_QueueDestroyTexture(
	Refresh_Renderer *driverData,
	Refresh_Texture *texture
) {
	NOT_IMPLEMENTED
}

static void D3D11_QueueDestroySampler(
	Refresh_Renderer *driverData,
	Refresh_Sampler *sampler
) {
	NOT_IMPLEMENTED
}

static void D3D11_QueueDestroyBuffer(
	Refresh_Renderer *driverData,
	Refresh_Buffer *buffer
) {
	NOT_IMPLEMENTED
}

static void D3D11_QueueDestroyShaderModule(
	Refresh_Renderer *driverData,
	Refresh_ShaderModule *shaderModule
) {
	NOT_IMPLEMENTED
}

static void D3D11_QueueDestroyComputePipeline(
	Refresh_Renderer *driverData,
	Refresh_ComputePipeline *computePipeline
) {
	NOT_IMPLEMENTED
}

static void D3D11_QueueDestroyGraphicsPipeline(
	Refresh_Renderer *driverData,
	Refresh_GraphicsPipeline *graphicsPipeline
) {
	NOT_IMPLEMENTED
}

/* Graphics State */

static Refresh_CommandBuffer* D3D11_AcquireCommandBuffer(
	Refresh_Renderer *driverData
) {
	NOT_IMPLEMENTED
	return NULL;
}

static void D3D11_BeginRenderPass(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	Refresh_ColorAttachmentInfo *colorAttachmentInfos,
	uint32_t colorAttachmentCount,
	Refresh_DepthStencilAttachmentInfo *depthStencilAttachmentInfo
) {
	NOT_IMPLEMENTED
}

static void D3D11_EndRenderPass(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer
) {
	NOT_IMPLEMENTED
}

static void D3D11_BindGraphicsPipeline(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	Refresh_GraphicsPipeline *graphicsPipeline
) {
	NOT_IMPLEMENTED
}

static void D3D11_SetViewport(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	Refresh_Viewport *viewport
) {
	NOT_IMPLEMENTED
}

static void D3D11_SetScissor(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	Refresh_Rect *scissor
) {
	NOT_IMPLEMENTED
}

static void D3D11_BindVertexBuffers(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	uint32_t firstBinding,
	uint32_t bindingCount,
	Refresh_Buffer **pBuffers,
	uint64_t *pOffsets
) {
	NOT_IMPLEMENTED
}

static void D3D11_BindIndexBuffer(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	Refresh_Buffer *buffer,
	uint64_t offset,
	Refresh_IndexElementSize indexElementSize
) {
	NOT_IMPLEMENTED
}

/* Compute State */

static void D3D11_BindComputePipeline(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	Refresh_ComputePipeline *computePipeline
) {
	NOT_IMPLEMENTED
}

static void D3D11_BindComputeBuffers(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	Refresh_Buffer **pBuffers
) {
	NOT_IMPLEMENTED
}

static void D3D11_BindComputeTextures(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	Refresh_Texture **pTextures
) {
	NOT_IMPLEMENTED
}

/* Window and Swapchain Management */

static uint8_t D3D11_ClaimWindow(
	Refresh_Renderer *driverData,
	void *windowHandle,
	Refresh_PresentMode presentMode
) {
	NOT_IMPLEMENTED
	return 0;
}

static uint8_t D3D11_UnclaimWindow(
	Refresh_Renderer *driverData,
	void *windowHandle
) {
	NOT_IMPLEMENTED
	return 0;
}

static Refresh_Texture* D3D11_AcquireSwapchainTexture(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer,
	void *windowHandle,
	uint32_t *pWidth,
	uint32_t *pHeight
) {
	NOT_IMPLEMENTED
	return NULL;
}

static Refresh_TextureFormat D3D11_GetSwapchainFormat(
	Refresh_Renderer *driverData,
	void *windowHandle
) {
	NOT_IMPLEMENTED
	return REFRESH_TEXTUREFORMAT_R8G8B8A8;
}

static void D3D11_SetSwapchainPresentMode(
	Refresh_Renderer *driverData,
	void *windowHandle,
	Refresh_PresentMode presentMode
) {
	NOT_IMPLEMENTED
}

/* Submission and Fences */

static void D3D11_Submit(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer
) {
	NOT_IMPLEMENTED
}

static Refresh_Fence* D3D11_SubmitAndAcquireFence(
	Refresh_Renderer *driverData,
	Refresh_CommandBuffer *commandBuffer
) {
	NOT_IMPLEMENTED
	return NULL;
}

static void D3D11_Wait(
	Refresh_Renderer *driverData
) {
	NOT_IMPLEMENTED
}

static void D3D11_WaitForFences(
	Refresh_Renderer *driverData,
	uint8_t waitAll,
	uint32_t fenceCount,
	Refresh_Fence **pFences
) {
	NOT_IMPLEMENTED
}

static int D3D11_QueryFence(
	Refresh_Renderer *driverData,
	Refresh_Fence *fence
) {
	NOT_IMPLEMENTED
	return 0;
}

static void D3D11_ReleaseFence(
	Refresh_Renderer *driverData,
	Refresh_Fence *fence
) {
	NOT_IMPLEMENTED
}

/* Device Creation */

static uint8_t D3D11_PrepareDriver(
	uint32_t *flags
) {
	/* Nothing to do here. */
	return 1;
}

static Refresh_Device* D3D11_CreateDevice(
	uint8_t debugMode
) {
	D3D11Renderer *renderer;
	PFN_CREATE_DXGI_FACTORY CreateDXGIFactoryFunc;
	PFN_D3D11_CREATE_DEVICE D3D11CreateDeviceFunc;
	D3D_FEATURE_LEVEL levels[] = { D3D_FEATURE_LEVEL_11_0 };
	void* factory6;
	uint32_t flags;
	DXGI_ADAPTER_DESC1 adapterDesc;
	HRESULT res;
	Refresh_Device* result;

	/* Allocate and zero out the renderer */
	renderer = (D3D11Renderer*) SDL_calloc(1, sizeof(D3D11Renderer));

	/* Load the D3DCompiler library */
	renderer->d3dcompiler_dll = SDL_LoadObject(D3DCOMPILER_DLL);
	if (renderer->d3dcompiler_dll == NULL)
	{
		Refresh_LogError("Could not find " D3DCOMPILER_DLL);
		return NULL;
	}

	/* Load the D3DCompile function pointer */
	renderer->D3DCompileFunc = (PFN_D3DCOMPILE) SDL_LoadFunction(
		renderer->d3dcompiler_dll,
		"D3DCompile"
	);
	if (renderer->D3DCompileFunc == NULL)
	{
		Refresh_LogError("Could not load D3DCompile function!");
		return NULL;
	}

	/* Load the DXGI library */
	renderer->dxgi_dll = SDL_LoadObject(DXGI_DLL);
	if (renderer->dxgi_dll == NULL)
	{
		Refresh_LogError("Could not find " DXGI_DLL);
		return NULL;
	}

	/* Load the CreateDXGIFactory function */
	CreateDXGIFactoryFunc = (PFN_CREATE_DXGI_FACTORY) SDL_LoadFunction(
		renderer->dxgi_dll,
		"CreateDXGIFactory1"
	);
	if (CreateDXGIFactoryFunc == NULL)
	{
		Refresh_LogError("Could not load CreateDXGIFactory1 function!");
		return NULL;
	}

	/* Create the DXGI factory */
	res = CreateDXGIFactoryFunc(
		&D3D_IID_IDXGIFactory1,
		&renderer->factory
	);
	ERROR_CHECK_RETURN("Could not create DXGIFactory", NULL);

	/* Get the default adapter */
	res = IDXGIAdapter1_QueryInterface(
		renderer->factory,
		&D3D_IID_IDXGIFactory6,
		(void**) &factory6
	);
	if (SUCCEEDED(res))
	{
		IDXGIFactory6_EnumAdapterByGpuPreference(
			(IDXGIFactory6*) factory6,
			0,
			DXGI_GPU_PREFERENCE_HIGH_PERFORMANCE,
			&D3D_IID_IDXGIAdapter1,
			&renderer->adapter
		);
	}
	else
	{
		IDXGIFactory1_EnumAdapters1(
			renderer->factory,
			0,
			&renderer->adapter
		);
	}

	/* Get information about the selected adapter. Used for logging info. */
	IDXGIAdapter1_GetDesc1(renderer->adapter, &adapterDesc);

	/* Load the D3D library */
	renderer->d3d11_dll = SDL_LoadObject(D3D11_DLL);
	if (renderer->d3d11_dll == NULL)
	{
		Refresh_LogError("Could not find " D3D11_DLL);
		return NULL;
	}

	/* Load the CreateDevice function */
	D3D11CreateDeviceFunc = (PFN_D3D11_CREATE_DEVICE) SDL_LoadFunction(
		renderer->d3d11_dll,
		"D3D11CreateDevice"
	);
	if (D3D11CreateDeviceFunc == NULL)
	{
		Refresh_LogError("Could not load D3D11CreateDevice function!");
		return NULL;
	}

	/* Set up device flags */
	flags = D3D11_CREATE_DEVICE_BGRA_SUPPORT;
	if (debugMode)
	{
		flags |= D3D11_CREATE_DEVICE_DEBUG;
	}

	/* Create the device */
tryCreateDevice:
	res = D3D11CreateDeviceFunc(
		(IDXGIAdapter*)renderer->adapter,
		D3D_DRIVER_TYPE_UNKNOWN, /* Must be UNKNOWN if adapter is non-null according to spec */
		NULL,
		flags,
		levels,
		SDL_arraysize(levels),
		D3D11_SDK_VERSION,
		&renderer->device,
		&renderer->featureLevel,
		&renderer->immediateContext
	);
	if (FAILED(res) && debugMode)
	{
		/* If device creation failed, and we're in debug mode, remove the debug flag and try again. */
		Refresh_LogWarn("Creating device in debug mode failed with error %08X. Trying non-debug.", res);
		flags &= ~D3D11_CREATE_DEVICE_DEBUG;
		debugMode = 0;
		goto tryCreateDevice;
	}

	ERROR_CHECK_RETURN("Could not create D3D11 device", NULL);

	/* Print driver info */
	Refresh_LogInfo("Refresh Driver: D3D11");
	Refresh_LogInfo("D3D11 Adapter: %S", adapterDesc.Description);

	/* Create the command buffer pool */
	renderer->commandBufferPool = (D3D11CommandBufferPool*) SDL_calloc(
		1,
		sizeof(D3D11CommandBufferPool)
	);

	/* Create mutexes */
	renderer->contextLock = SDL_CreateMutex();
	renderer->commandBufferAcquisitionMutex = SDL_CreateMutex();

	/* Initialize miscellaneous renderer members */
	renderer->debugMode = (flags & D3D11_CREATE_DEVICE_DEBUG);
	renderer->blendFactor.x = 1.0f;
	renderer->blendFactor.y = 1.0f;
	renderer->blendFactor.z = 1.0f;
	renderer->blendFactor.w = 1.0f;

	/* Create the Refresh Device */
	result = (Refresh_Device*) SDL_malloc(sizeof(Refresh_Device));
	ASSIGN_DRIVER(D3D11)

	result->driverData = (Refresh_Renderer*) renderer;

	return result;
}

Refresh_Driver D3D11Driver = {
	"D3D11",
	D3D11_PrepareDriver,
	D3D11_CreateDevice
};

#endif //REFRESH_DRIVER_D3D11