primitive topology and input layout

hw3d/Graphics.cpp

@@ -134,9 +134,18 @@ void Graphics::DrawTestTriangle()
 	pContext->IASetVertexBuffers( 0u,1u,pVertexBuffer.GetAddressOf(),&stride,&offset );
 	
 
+	// create pixel shader
+	wrl::ComPtr<ID3D11PixelShader> pPixelShader;
+	wrl::ComPtr<ID3DBlob> pBlob;
+	GFX_THROW_INFO( D3DReadFileToBlob( L"PixelShader.cso",&pBlob ) );
+	GFX_THROW_INFO( pDevice->CreatePixelShader( pBlob->GetBufferPointer(),pBlob->GetBufferSize(),nullptr,&pPixelShader ) );
+
+	// bind pixel shader
+	pContext->PSSetShader( pPixelShader.Get(),nullptr,0u );
+
+
 	// create vertex shader
 	wrl::ComPtr<ID3D11VertexShader> pVertexShader;
-	wrl::ComPtr<ID3DBlob> pBlob;
 	GFX_THROW_INFO( D3DReadFileToBlob( L"VertexShader.cso",&pBlob ) );
 	GFX_THROW_INFO( pDevice->CreateVertexShader( pBlob->GetBufferPointer(),pBlob->GetBufferSize(),nullptr,&pVertexShader ) );
 
@@ -144,19 +153,31 @@ void Graphics::DrawTestTriangle()
 	pContext->VSSetShader( pVertexShader.Get(),nullptr,0u );
 		
 
-	// create pixel shader
-	wrl::ComPtr<ID3D11PixelShader> pPixelShader;
-	GFX_THROW_INFO( D3DReadFileToBlob( L"PixelShader.cso",&pBlob ) );
-	GFX_THROW_INFO( pDevice->CreatePixelShader( pBlob->GetBufferPointer(),pBlob->GetBufferSize(),nullptr,&pPixelShader ) );
+	// input (vertex) layout (2d position only)
+	wrl::ComPtr<ID3D11InputLayout> pInputLayout;
+	const D3D11_INPUT_ELEMENT_DESC ied[] =
+	{
+		{ "Position",0,DXGI_FORMAT_R32G32_FLOAT,0,0,D3D11_INPUT_PER_VERTEX_DATA,0 },
+	};
+	GFX_THROW_INFO( pDevice->CreateInputLayout(
+		ied,(UINT)std::size( ied ),
+		pBlob->GetBufferPointer(),
+		pBlob->GetBufferSize(),
+		&pInputLayout
+	) );
 
-	// bind pixel shader
-	pContext->PSSetShader( pPixelShader.Get(),nullptr,0u );
+	// bind vertex layout
+	pContext->IASetInputLayout( pInputLayout.Get() );
 
 
 	// bind render target
 	pContext->OMSetRenderTargets( 1u,pTarget.GetAddressOf(),nullptr );
 
 
+	// Set primitive topology to triangle list (groups of 3 vertices)
+	pContext->IASetPrimitiveTopology( D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST );
+
+
 	// configure viewport
 	D3D11_VIEWPORT vp;
 	vp.Width = 800;