add depth buffer

StudyDx/App.cpp

@@ -25,6 +25,11 @@ void App::DoFrame()
 {
 	const float c = sin(timer.Peek()) / 2.0f + 0.5f;
 	wnd.Gfx().ClearBuffer(c, c, 1.0f);
+	wnd.Gfx().DrawTestTriangle(
+		-timer.Peek(),
+		0.0f,
+		0.0f
+	);
 	wnd.Gfx().DrawTestTriangle(
 		timer.Peek(),
 		wnd.mouse.GetPosX() / 400.0f - 1.0f,

StudyDx/Graphics.cpp

@@ -41,10 +41,10 @@ Graphics::Graphics( HWND hWnd )
 	sd.SampleDesc.Count = 1;
 	sd.SampleDesc.Quality = 0;
 	sd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
-	sd.BufferCount = 2;
+	sd.BufferCount = 1;
 	sd.OutputWindow = hWnd;
 	sd.Windowed = TRUE;
-	sd.SwapEffect = DXGI_SWAP_EFFECT_FLIP_DISCARD;
+	sd.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
 	sd.Flags = 0;
 
 	UINT swapCreateFlags = 0u;
@@ -72,11 +72,46 @@ Graphics::Graphics( HWND hWnd )
 		&pContext
 	));
 
-
 	// gain access to texture subresource in swap chain (back buffer)
 	wrl::ComPtr<ID3D11Resource> pBackBuffer;
 	GFX_THROW_INFO(pSwap->GetBuffer(0, __uuidof(ID3D11Resource), &pBackBuffer));
 	GFX_THROW_INFO(pDevice->CreateRenderTargetView(pBackBuffer.Get(), nullptr, &pTarget));
+
+	// Create depth stencil state
+	D3D11_DEPTH_STENCIL_DESC depthStencilDesc = {};
+	depthStencilDesc.DepthEnable = TRUE;
+	depthStencilDesc.DepthWriteMask = D3D11_DEPTH_WRITE_MASK_ALL;
+	depthStencilDesc.DepthFunc = D3D11_COMPARISON_LESS;
+	wrl::ComPtr<ID3D11DepthStencilState> pDepthStencilState;
+	// Create depth stencil state
+	GFX_THROW_INFO(pDevice->CreateDepthStencilState(&depthStencilDesc, &pDepthStencilState));
+
+	// bind depth state
+	pContext->OMSetDepthStencilState(pDepthStencilState.Get(), 1u);
+
+	// Create the depth stencil texture
+	wrl::ComPtr<ID3D11Texture2D> depthStencilTexture;
+	D3D11_TEXTURE2D_DESC depthStencilTextureDesc = {};
+	depthStencilTextureDesc.Width = 800;
+	depthStencilTextureDesc.Height = 600;
+	depthStencilTextureDesc.MipLevels = 1u;
+	depthStencilTextureDesc.ArraySize = 1u;
+	depthStencilTextureDesc.Format = DXGI_FORMAT_D32_FLOAT;
+	depthStencilTextureDesc.SampleDesc.Count = 1u;
+	depthStencilTextureDesc.SampleDesc.Quality = 0u;
+	depthStencilTextureDesc.Usage = D3D11_USAGE_DEFAULT;
+	depthStencilTextureDesc.BindFlags = D3D11_BIND_DEPTH_STENCIL;
+	GFX_THROW_INFO(pDevice->CreateTexture2D(&depthStencilTextureDesc, nullptr, &depthStencilTexture));
+
+	// Create the depth stencil view
+	D3D11_DEPTH_STENCIL_VIEW_DESC depthStencilViewDesc = {};
+	depthStencilViewDesc.Format = DXGI_FORMAT_D32_FLOAT;
+	depthStencilViewDesc.ViewDimension = D3D11_DSV_DIMENSION_TEXTURE2D;
+	depthStencilViewDesc.Texture2D.MipSlice = 0u;
+	GFX_THROW_INFO(pDevice->CreateDepthStencilView(depthStencilTexture.Get(), &depthStencilViewDesc, &pDSView));
+
+	// Bind depth stencil view to out put merger
+	pContext->OMSetRenderTargets(1u, pTarget.GetAddressOf(), pDSView.Get());
 }
 
 void Graphics::EndFrame()
@@ -103,6 +138,7 @@ void Graphics::ClearBuffer(float red, float green, float blue) noexcept
 {
 	const float color[] = { red,green,blue,1.0f };
 	pContext->ClearRenderTargetView(pTarget.Get(), color);
+	pContext->ClearDepthStencilView(pDSView.Get(), D3D11_CLEAR_DEPTH, 1.0f, 0u);
 }
 
 void Graphics::DrawTestTriangle(float angle, float x, float y)
@@ -209,7 +245,7 @@ void Graphics::DrawTestTriangle(float angle, float x, float y)
 			// rotate Y axis
 			* dx::XMMatrixRotationY(-angle)
 			// attach the image to mouse
-			* dx::XMMatrixTranslation( x, y, 4.0f )
+			* dx::XMMatrixTranslation( x, 0.0f, 4.0f + y )
 			// projection
 			* dx::XMMatrixPerspectiveLH( 1.0f, heightWidthRatio, 0.5f, 10.0f)
 		)
@@ -229,8 +265,6 @@ void Graphics::DrawTestTriangle(float angle, float x, float y)
 	// Bind constant buffer to vertex
 	pContext->VSSetConstantBuffers(0u, 1u, pConstantBuffer.GetAddressOf());
 
-
-
 	// Create constant buffer for color
 	struct ColorConstantBuffer
 	{
@@ -269,7 +303,6 @@ void Graphics::DrawTestTriangle(float angle, float x, float y)
 	// Bind constant buffer to vertex
 	pContext->PSSetConstantBuffers(0u, 1u, pColorConstantBuffer.GetAddressOf());
 
-
 	// create pixel shader
 	wrl::ComPtr<ID3D11PixelShader> pPixelShader;
 	wrl::ComPtr<ID3DBlob> pBlob;
@@ -306,7 +339,8 @@ void Graphics::DrawTestTriangle(float angle, float x, float y)
 	pContext->IASetInputLayout(pInputLayout.Get());
 
 	// bind render target
-	pContext->OMSetRenderTargets(1u, pTarget.GetAddressOf(), nullptr);
+	// After apply depth stencil view to Output Merger, we remove this one
+	//pContext->OMSetRenderTargets(1u, pTarget.GetAddressOf(), nullptr);
 
 	// Set primitive topology to triangle list (groups of 3 vertices)
 	pContext->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
@@ -321,7 +355,6 @@ void Graphics::DrawTestTriangle(float angle, float x, float y)
 	vp.TopLeftY = 0;
 	pContext->RSSetViewports(1u, &vp);
 
-
 	//GFX_THROW_INFO_ONLY(pContext->Draw((UINT)std::size(vertices), 0u));
 	GFX_THROW_INFO_ONLY(pContext->DrawIndexed((UINT)std::size(indices), 0u, 0u));
 }

StudyDx/Graphics.h

@@ -66,4 +66,6 @@ private:
     Microsoft::WRL::ComPtr<ID3D11DeviceContext> pContext;
 	// 指向View的指针
     Microsoft::WRL::ComPtr<ID3D11RenderTargetView> pTarget;
+    // 指向Depth Buffer View的指针
+    Microsoft::WRL::ComPtr<ID3D11DepthStencilView> pDSView;
 };
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