Swapchain creation, resizing, and destruction

src/Refresh_Driver_D3D11.c

@@ -36,9 +36,17 @@
 #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)) \
@@ -78,8 +86,6 @@
 		);						\
 	}
 
-#define NOT_IMPLEMENTED SDL_assert(0 && "Not implemented!");
-
 /* Conversions */
 
 static DXGI_FORMAT RefreshToD3D11_SurfaceFormat[] =
@@ -235,13 +241,26 @@ static D3D11_TEXTURE_ADDRESS_MODE RefreshToD3D11_SamplerAddressMode[] =
 
 /* Structs */
 
+typedef struct D3D11Texture
+{
+	ID3D11RenderTargetView *rtv;
+} D3D11Texture;
+
+typedef struct D3D11SwapchainData
+{
+	IDXGISwapChain* swapchain;
+	D3D11Texture refreshTexture;
+	void* windowHandle;
+} D3D11SwapchainData;
+
 typedef struct D3D11CommandBuffer
 {
 	ID3D11DeviceContext *context;
+	ID3D11CommandList *commandList;
+	D3D11SwapchainData *swapchainData;
 	SDL_threadID threadID;
 	uint8_t recording;
 	uint8_t fixed;
-	ID3D11CommandList *commandList;
 } D3D11CommandBuffer;
 
 typedef struct D3D11CommandBufferPool
@@ -253,7 +272,6 @@ typedef struct D3D11CommandBufferPool
 
 typedef struct D3D11Renderer
 {
-	/* Persistent D3D11 Objects*/
 	ID3D11Device *device;
 	ID3D11DeviceContext *immediateContext;
 	IDXGIFactory1 *factory;
@@ -261,18 +279,22 @@ typedef struct D3D11Renderer
 	void *d3d11_dll;
 	void *dxgi_dll;
 
-	/* Deferred Contexts */
 	D3D11CommandBufferPool *commandBufferPool;
 
-	/* Blend State */
+	D3D11SwapchainData** swapchainDatas;
+	uint32_t swapchainDataCount;
+	uint32_t swapchainDataCapacity;
+
 	Refresh_Vec4 blendFactor;
 
-	/* Capabilities */
 	uint8_t debugMode;
 	D3D_FEATURE_LEVEL featureLevel;
-
 } D3D11Renderer;
 
+/* Predeclarations */
+
+static void D3D11_Wait(Refresh_Renderer* driverData);
+
 /* Logging */
 
 static void D3D11_INTERNAL_LogError(
@@ -331,6 +353,187 @@ static void D3D11_INTERNAL_LogError(
 	Refresh_LogError("%s! Error Code: %s (0x%08X)", msg, wszMsgBuff, res);
 }
 
+/* Swapchain Management */
+
+static uint8_t D3D11_INTERNAL_CreateSwapchain(
+	D3D11Renderer *renderer,
+	void *windowHandle
+) {
+	IDXGIFactory1 *pParent;
+	DXGI_MODE_DESC swapchainBufferDesc;
+	DXGI_SWAP_CHAIN_DESC swapchainDesc;
+	IDXGISwapChain *swapchain;
+	D3D11SwapchainData *swapchainData;
+	SDL_SysWMinfo info;
+	HWND dxgiHandle;
+	ID3D11Texture2D *swapchainTexture;
+	D3D11_RENDER_TARGET_VIEW_DESC swapchainViewDesc;
+	HRESULT res;
+
+	SDL_VERSION(&info.version);
+	SDL_GetWindowWMInfo((SDL_Window*) windowHandle, &info);
+	dxgiHandle = info.info.win.window;
+
+	/* Initialize swapchain buffer descriptor */
+	swapchainBufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
+	swapchainBufferDesc.Width = 0;
+	swapchainBufferDesc.Height = 0;
+	swapchainBufferDesc.RefreshRate.Numerator = 0;
+	swapchainBufferDesc.RefreshRate.Denominator = 0;
+	swapchainBufferDesc.Scaling = DXGI_MODE_SCALING_UNSPECIFIED;
+	swapchainBufferDesc.ScanlineOrdering = DXGI_MODE_SCANLINE_ORDER_UNSPECIFIED;
+
+	/* Initialize the swapchain descriptor */
+	swapchainDesc.BufferDesc = swapchainBufferDesc;
+	swapchainDesc.BufferCount = 3;
+	swapchainDesc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
+	swapchainDesc.OutputWindow = dxgiHandle;
+	swapchainDesc.Flags = 0;
+	swapchainDesc.SampleDesc.Count = 1;
+	swapchainDesc.SampleDesc.Quality = 0;
+	swapchainDesc.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
+	swapchainDesc.Windowed = 1;
+
+	/* Create the swapchain! */
+	res = IDXGIFactory1_CreateSwapChain(
+		renderer->factory,
+		(IUnknown*) renderer->device,
+		&swapchainDesc,
+		&swapchain
+	);
+	ERROR_CHECK_RETURN("Could not create swap chain", 0);
+
+	/*
+	 * The swapchain's parent is a separate factory from the factory that
+	 * we used to create the swapchain, and only that parent can be used to
+	 * set the window association. Trying to set an association on our factory
+	 * will silently fail and doesn't even verify arguments or return errors.
+	 * See https://gamedev.net/forums/topic/634235-dxgidisabling-altenter/4999955/
+	 */
+	res = IDXGISwapChain_GetParent(
+		swapchain,
+		&D3D_IID_IDXGIFactory1,
+		(void**) &pParent
+	);
+	if (FAILED(res))
+	{
+		Refresh_LogWarn(
+			"Could not get swapchain parent! Error Code: %08X",
+			res
+		);
+	}
+	else
+	{
+		/* Disable DXGI window crap */
+		res = IDXGIFactory1_MakeWindowAssociation(
+			pParent,
+			dxgiHandle,
+			DXGI_MWA_NO_WINDOW_CHANGES
+		);
+		if (FAILED(res))
+		{
+			Refresh_LogWarn(
+				"MakeWindowAssociation failed! Error Code: %08X",
+				res
+			);
+		}
+	}
+
+	/* Set up the swapchain data */
+	swapchainData = (D3D11SwapchainData*) SDL_malloc(sizeof(D3D11SwapchainData));
+	swapchainData->swapchain = swapchain;
+	swapchainData->windowHandle = windowHandle;
+	swapchainData->refreshTexture.rtv = NULL;
+	SDL_SetWindowData((SDL_Window*) windowHandle, WINDOW_SWAPCHAIN_DATA, swapchainData);
+	if (renderer->swapchainDataCount >= renderer->swapchainDataCapacity)
+	{
+		renderer->swapchainDataCapacity *= 2;
+		renderer->swapchainDatas = SDL_realloc(
+			renderer->swapchainDatas,
+			renderer->swapchainDataCapacity * sizeof(D3D11SwapchainData*)
+		);
+	}
+	renderer->swapchainDatas[renderer->swapchainDataCount] = swapchainData;
+	renderer->swapchainDataCount += 1;
+
+	/* Create the RTV for the swapchain */
+	swapchainViewDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
+	swapchainViewDesc.ViewDimension = D3D11_RTV_DIMENSION_TEXTURE2D;
+	swapchainViewDesc.Texture2D.MipSlice = 0;
+
+	res = IDXGISwapChain_GetBuffer(
+		swapchainData->swapchain,
+		0,
+		&D3D_IID_ID3D11Texture2D,
+		(void**) &swapchainTexture
+	);
+	ERROR_CHECK_RETURN("Could not get buffer from swapchain", 0);
+
+	res = ID3D11Device_CreateRenderTargetView(
+		renderer->device,
+		(ID3D11Resource*) swapchainTexture,
+		&swapchainViewDesc,
+		&swapchainData->refreshTexture.rtv
+	);
+	ERROR_CHECK_RETURN("Swapchain RT view creation failed", 0);
+
+	/* Cleanup */
+	ID3D11Texture2D_Release(swapchainTexture);
+
+	return 1;
+}
+
+static uint8_t D3D11_INTERNAL_ResizeSwapchain(
+	D3D11Renderer *renderer,
+	D3D11SwapchainData *swapchainData
+) {
+	ID3D11Texture2D *swapchainTexture;
+	D3D11_RENDER_TARGET_VIEW_DESC swapchainViewDesc;
+	int w, h;
+	HRESULT res;
+
+	/* Release the old RTV */
+	ID3D11RenderTargetView_Release(swapchainData->refreshTexture.rtv);
+
+	/* Resize the swapchain */
+	SDL_GetWindowSize((SDL_Window*) swapchainData->windowHandle, &w, &h);
+	res = IDXGISwapChain_ResizeBuffers(
+		swapchainData->swapchain,
+		0,	/* Keep buffer count the same */
+		w,
+		h,
+		DXGI_FORMAT_UNKNOWN,	/* Keep the old format */
+		0
+	);
+	ERROR_CHECK_RETURN("Could not resize swapchain buffers", 0);
+
+	/* Recreate the RTV using the new swapchain buffer */
+	swapchainViewDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
+	swapchainViewDesc.ViewDimension = D3D11_RTV_DIMENSION_TEXTURE2D;
+	swapchainViewDesc.Texture2D.MipSlice = 0;
+
+	res = IDXGISwapChain_GetBuffer(
+		swapchainData->swapchain,
+		0,
+		&D3D_IID_ID3D11Texture2D,
+		&swapchainTexture
+	);
+	ERROR_CHECK_RETURN("Could not get buffer from swapchain", 0);
+
+	res = ID3D11Device_CreateRenderTargetView(
+		renderer->device,
+		(ID3D11Resource*) swapchainTexture,
+		&swapchainViewDesc,
+		&swapchainData->refreshTexture.rtv
+	);
+	ERROR_CHECK_RETURN("Could not create render target view for swapchain", 0);
+
+	/* Cleanup */
+	ID3D11Texture2D_Release(swapchainTexture);
+
+	return 1;
+}
+
 /* Quit */
 
 static void D3D11_DestroyDevice(
@@ -354,6 +557,15 @@ static void D3D11_DestroyDevice(
 	SDL_free(renderer->commandBufferPool->elements);
 	SDL_free(renderer->commandBufferPool);
 
+	/* Release swapchain */
+	for (i = 0; i < renderer->swapchainDataCount; i += 1)
+	{
+		ID3D11RenderTargetView_Release(renderer->swapchainDatas[i]->refreshTexture.rtv);
+		IDXGISwapChain_Release(renderer->swapchainDatas[i]->swapchain);
+		SDL_free(renderer->swapchainDatas[i]);
+	}
+	SDL_free(renderer->swapchainDatas);
+
 	/* Release persistent D3D11 objects */
 	ID3D11DeviceContext_Release(renderer->immediateContext);
 	ID3D11Device_Release(renderer->device);
@@ -776,24 +988,79 @@ static Refresh_CommandBuffer* D3D11_AcquireCommandBuffer(
 	commandBuffer->threadID = SDL_ThreadID();
 	commandBuffer->recording = 1;
 	commandBuffer->fixed = fixed;
+	commandBuffer->swapchainData = NULL;
 	commandBuffer->commandList = NULL;
 
 	return (Refresh_CommandBuffer*) commandBuffer;
 }
 
+static D3D11SwapchainData* D3D11_INTERNAL_FetchSwapchainData(
+	D3D11Renderer* renderer,
+	void* windowHandle
+) {
+	D3D11SwapchainData* swapchainData = NULL;
+
+	swapchainData = (D3D11SwapchainData*) SDL_GetWindowData(windowHandle, WINDOW_SWAPCHAIN_DATA);
+
+	if (swapchainData == NULL)
+	{
+		if (D3D11_INTERNAL_CreateSwapchain(renderer, windowHandle))
+		{
+			swapchainData = (D3D11SwapchainData*) SDL_GetWindowData(windowHandle, WINDOW_SWAPCHAIN_DATA);
+		}
+	}
+
+	return swapchainData;
+}
+
 Refresh_Texture* D3D11_AcquireSwapchainTexture(
 	Refresh_Renderer *driverData,
 	Refresh_CommandBuffer *commandBuffer,
 	void *windowHandle
 ) {
-	NOT_IMPLEMENTED
+	D3D11Renderer *renderer = (D3D11Renderer*) driverData;
+	D3D11CommandBuffer *cmdbuf = (D3D11CommandBuffer*) commandBuffer;
+	D3D11SwapchainData *swapchainData;
+	DXGI_SWAP_CHAIN_DESC swapchainDesc;
+	int w, h;
+	HRESULT res;
+
+	/* Fetch the swapchain data, creating a new swapchain if needed. */
+	swapchainData = D3D11_INTERNAL_FetchSwapchainData(renderer, windowHandle);
+	if (swapchainData == NULL)
+	{
+		return NULL;
+	}
+
+	/* Check for window size changes and resize the swapchain if needed. */
+	IDXGISwapChain_GetDesc(swapchainData->swapchain, &swapchainDesc);
+	SDL_GetWindowSize((SDL_Window*) windowHandle, &w, &h);
+
+	if (w != swapchainDesc.BufferDesc.Width || h != swapchainDesc.BufferDesc.Height)
+	{
+		res = D3D11_INTERNAL_ResizeSwapchain(renderer, swapchainData);
+		ERROR_CHECK_RETURN("Could not resize swapchain", NULL);
+	}
+
+	/* Let's try this again... */
+	swapchainData = D3D11_INTERNAL_FetchSwapchainData(renderer, windowHandle);
+	if (swapchainData == NULL)
+	{
+		return NULL;
+	}
+
+	/* Let the command buffer know it's associated with this swapchain. */
+	cmdbuf->swapchainData = swapchainData;
+
+	/* Return the swapchain texture */
+	return (Refresh_Texture*) &swapchainData->refreshTexture;
 }
 
 Refresh_TextureFormat D3D11_GetSwapchainFormat(
 	Refresh_Renderer* driverData,
 	void* windowHandle
 ) {
-	NOT_IMPLEMENTED
+	return DXGI_FORMAT_R8G8B8A8_UNORM;
 }
 
 static void D3D11_Submit(
@@ -814,6 +1081,7 @@ static void D3D11_Submit(
 
 		if (commandBuffer->fixed && !commandBuffer->recording)
 		{
+			/* Grab the prerecorded command list. */
 			commandList = commandBuffer->commandList;
 		}
 		else
@@ -847,6 +1115,16 @@ static void D3D11_Submit(
 
 		/* Mark the command buffer as not-recording so that it can be used to record again. */
 		commandBuffer->recording = 0;
+
+		/* Present, if applicable */
+		if (commandBuffer->swapchainData)
+		{
+			IDXGISwapChain_Present(
+				commandBuffer->swapchainData->swapchain,
+				1, /* FIXME: Assumes vsync! */
+				0
+			);
+		}
 	}
 }
 
@@ -1002,6 +1280,18 @@ tryCreateDevice:
 
 	result->driverData = (Refresh_Renderer*) renderer;
 
+	/* Create the initial swapchain */
+	renderer->swapchainDataCapacity = 1;
+	renderer->swapchainDataCount = 0;
+	renderer->swapchainDatas = SDL_malloc(
+		renderer->swapchainDataCapacity * sizeof(D3D11SwapchainData*)
+	);
+
+	if (!D3D11_INTERNAL_CreateSwapchain(renderer, presentationParameters->deviceWindowHandle))
+	{
+		return NULL;
+	}
+
 	return result;
 }
 

src/Refresh_Driver_D3D11_cdefines.h

@@ -32,6 +32,7 @@ typedef HRESULT(WINAPI* PFN_CREATE_DXGI_FACTORY)(const GUID* riid, void** ppFact
 static const IID D3D_IID_IDXGIFactory1 = { 0x770aae78,0xf26f,0x4dba,{0xa8,0x29,0x25,0x3c,0x83,0xd1,0xb3,0x87} };
 static const IID D3D_IID_IDXGIFactory6 = { 0xc1b6694f,0xff09,0x44a9,{0xb0,0x3c,0x77,0x90,0x0a,0x0a,0x1d,0x17} };
 static const IID D3D_IID_IDXGIAdapter1 = { 0x29038f61,0x3839,0x4626,{0x91,0xfd,0x08,0x68,0x79,0x01,0x1a,0x05} };
+static const IID D3D_IID_ID3D11Texture2D = { 0x6f15aaf2,0xd208,0x4e89,{0x9a,0xb4,0x48,0x95,0x35,0xd3,0x4f,0x9c} };
 
 /* IDXGIFactory6 (taken from dxgi1_6.h, cleaned up a bit) */
 typedef enum