삼각형 띄우기

void Game::Init(HWND hand)
{
	_hwnd = hand;
	_width = GWinSizeX;
	_height = GWinSizeY;

	CreateDeviceAndSwapChain();
	CreateRenterTargetView();
	SetViewPort();

	CreateGeometry();
	CreateVS();
	CreateInputLayout();
	CreatePS();
}

CreateGeometry : 정점 데이터 -> GPU 버퍼

CreateVS : 버텍스 쉐이더 로드

CreateInputLayout..

 

D3D11_BUFFER_DESC desc;
ZeroMemory(&desc, sizeof(desc));
desc.Usage = D3D11_USAGE_IMMUTABLE;	// GPU Read Only
desc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
desc.ByteWidth = static_cast<uint32>( sizeof(Vertex) * _vertices.size() );

D3D11_SUBRESOURCE_DATA data;
ZeroMemory(&data, sizeof(data));
data.pSysMem = &_vertices[0];

_device->CreateBuffer(&desc, &data, _vertexBuffer.GetAddressOf());

Usage : IMMUTABLE은 한 번 만들고 안바꿈 -> GPU 리드 온리

pSysMem은 초기 데이터의 출처

 

void Game::CreateInputLayout()
{
	D3D11_INPUT_ELEMENT_DESC layout[] =
	{
		{ "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D11_INPUT_PER_VERTEX_DATA, 0 },
		{ "COLOR", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, 12, D3D11_INPUT_PER_VERTEX_DATA, 0 },
	};

	const int32 count = sizeof(layout) / sizeof(D3D11_INPUT_ELEMENT_DESC);
	_device->CreateInputLayout(layout, count, _vsBlob->GetBufferPointer(), _vsBlob->GetBufferSize(), _inputLayout.GetAddressOf());
}

결국 그래봐야 바이트 덩어리라 레이아웃 맞춰줘야 함

 

void Game::CreateVS()
{
	LoadShaderFromFile(L"Default.hlsl", "VS", "vs_5_0", _vsBlob);

	HRESULT hr = _device->CreateVertexShader(_vsBlob->GetBufferPointer(), _vsBlob->GetBufferSize(), nullptr, _vertexShader.GetAddressOf());
	CHECK(hr);
}

void Game::CreatePS()
{
	LoadShaderFromFile(L"Default.hlsl", "PS", "ps_5_0", _psBlob);

	HRESULT hr = _device->CreatePixelShader(_psBlob->GetBufferPointer(), _psBlob->GetBufferSize(), nullptr, _pixelShader.GetAddressOf());
	CHECK(hr);
}

void Game::LoadShaderFromFile(const wstring& path, const string& name, const string& version, ComPtr<ID3DBlob>& blob)
{
	const uint32 compileFlag = D3DCOMPILE_DEBUG | D3DCOMPILE_SKIP_OPTIMIZATION;

	HRESULT hr = ::D3DCompileFromFile(
		path.c_str(),
		nullptr,
		D3D_COMPILE_STANDARD_FILE_INCLUDE,
		name.c_str(),
		version.c_str(),
		compileFlag,
		0,
		blob.GetAddressOf(),
		nullptr
	);

	CHECK(hr);
}

ID2DBlob은 그냥 바이트 덩어리고 여기에 쉐이더 바이트 코드가 담김