diff --git a/src/Refresh_Driver_D3D11.c b/src/Refresh_Driver_D3D11.c
index c6d2c95..32c84e3 100644
--- a/src/Refresh_Driver_D3D11.c
+++ b/src/Refresh_Driver_D3D11.c
@@ -310,7 +310,7 @@ typedef struct D3D11Renderer
 	IDXGIAdapter1* adapter;
 	void *d3d11_dll;
 	void *dxgi_dll;
-	SDL_mutex *immediateContextMutex;
+	SDL_mutex *contextLock;
 
 	D3D11CommandBufferPool *commandBufferPool;
 	SDL_mutex *commandBufferAcquisitionMutex;
@@ -629,65 +629,6 @@ static void D3D11_DestroyDevice(
 
 /* Drawing */
 
-static void D3D11_Clear(
-	Refresh_Renderer* driverData,
-	Refresh_CommandBuffer* commandBuffer,
-	Refresh_Rect* clearRect,
-	Refresh_ClearOptions options,
-	Refresh_Vec4* colors,
-	uint32_t colorCount,
-	Refresh_DepthStencilValue depthStencil
-) {
-	D3D11Renderer *renderer = (D3D11Renderer*) driverData;
-	D3D11CommandBuffer *cmdbuf = (D3D11CommandBuffer*) commandBuffer;
-	D3D11_CLEAR_FLAG dsClearFlags;
-	float clearColors[4];
-	uint32_t i;
-
-	/* FIXME: What should we do about clearRect? */
-	/* FIXME: Do we need to use colorCount or is it always the number of bound RTs? */
-
-	if (options & REFRESH_CLEAROPTIONS_COLOR)
-	{
-		/* Clear color attachments */
-		for (i = 0; i < cmdbuf->numBoundColorAttachments; i += 1)
-		{
-			clearColors[0] = colors[i].x;
-			clearColors[1] = colors[i].y;
-			clearColors[2] = colors[i].z;
-			clearColors[3] = colors[i].w;
-
-			ID3D11DeviceContext_ClearRenderTargetView(
-				cmdbuf->context,
-				cmdbuf->rtViews[i],
-				clearColors
-			);
-		}
-	}
-
-	/* Check which of depth/stencil need to be cleared (if either) */
-	dsClearFlags = 0;
-	if (options & REFRESH_CLEAROPTIONS_DEPTH)
-	{
-		dsClearFlags |= D3D11_CLEAR_DEPTH;
-	}
-	if (options & REFRESH_CLEAROPTIONS_STENCIL)
-	{
-		dsClearFlags |= D3D11_CLEAR_STENCIL;
-	}
-
-	if (dsClearFlags != 0)
-	{
-		ID3D11DeviceContext_ClearDepthStencilView(
-			cmdbuf->context,
-			cmdbuf->dsView,
-			dsClearFlags,
-			depthStencil.depth,
-			(uint8_t) depthStencil.stencil
-		);
-	}
-}
-
 static void D3D11_DrawInstancedPrimitives(
 	Refresh_Renderer* driverData,
 	Refresh_CommandBuffer* commandBuffer,
@@ -1202,10 +1143,12 @@ static D3D11SwapchainData* D3D11_INTERNAL_FetchSwapchainData(
 	return swapchainData;
 }
 
-Refresh_Texture* D3D11_AcquireSwapchainTexture(
+static Refresh_Texture* D3D11_AcquireSwapchainTexture(
 	Refresh_Renderer *driverData,
 	Refresh_CommandBuffer *commandBuffer,
-	void *windowHandle
+	void *windowHandle,
+	uint32_t *pWidth,
+	uint32_t *pHeight
 ) {
 	D3D11Renderer *renderer = (D3D11Renderer*) driverData;
 	D3D11CommandBuffer *cmdbuf = (D3D11CommandBuffer*) commandBuffer;
@@ -1241,6 +1184,10 @@ Refresh_Texture* D3D11_AcquireSwapchainTexture(
 	/* Let the command buffer know it's associated with this swapchain. */
 	cmdbuf->swapchainData = swapchainData;
 
+	/* Send the dimensions to the out parameters. */
+	*pWidth = swapchainData->refreshTexture.twod.width;
+	*pHeight = swapchainData->refreshTexture.twod.height;
+
 	/* Return the swapchain texture */
 	return (Refresh_Texture*) &swapchainData->refreshTexture;
 }
@@ -1285,13 +1232,13 @@ static void D3D11_Submit(
 		}
 
 		/* Submit the command list to the immediate context */
-		SDL_LockMutex(renderer->immediateContextMutex);
+		SDL_LockMutex(renderer->contextLock);
 		ID3D11DeviceContext_ExecuteCommandList(
 			renderer->immediateContext,
 			commandList,
 			0
 		);
-		SDL_UnlockMutex(renderer->immediateContextMutex);
+		SDL_UnlockMutex(renderer->contextLock);
 
 		/* Now that we're done, either save the command list or release it. */
 		if (commandBuffer->fixed)
@@ -1309,11 +1256,13 @@ static void D3D11_Submit(
 		/* Present, if applicable */
 		if (commandBuffer->swapchainData)
 		{
+			SDL_LockMutex(renderer->contextLock);
 			IDXGISwapChain_Present(
 				commandBuffer->swapchainData->swapchain,
 				1, /* FIXME: Assumes vsync! */
 				0
 			);
+			SDL_UnlockMutex(renderer->contextLock);
 		}
 	}
 }
@@ -1458,7 +1407,7 @@ tryCreateDevice:
 	SDL_memset(renderer->commandBufferPool, 0, sizeof(D3D11CommandBufferPool));
 
 	/* Create mutexes */
-	renderer->immediateContextMutex = SDL_CreateMutex();
+	renderer->contextLock = SDL_CreateMutex();
 	renderer->commandBufferAcquisitionMutex = SDL_CreateMutex();
 
 	/* Initialize miscellaneous renderer members */