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#include <Windows.h>
#include <d3d11_1.h>
#include <directxcolors.h>
using namespace DirectX;
//----------------------------
//global variables
//----------------------------
HWND g_hWnd = NULL;
D3D_DRIVER_TYPE g_driverType = D3D_DRIVER_TYPE_NULL;
IDXGISwapChain* g_pSwapChain = NULL;
ID3D11Device* g_pd3dDevice = NULL;
D3D_FEATURE_LEVEL g_featureLevel = D3D_FEATURE_LEVEL_11_0;
ID3D11DeviceContext* g_pImmediateContext = NULL;
ID3D11RenderTargetView* g_pRenderTargetView = NULL;
//----------------------------
//function prototypes
//----------------------------
LRESULT CALLBACK winproc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
void Render();
HRESULT initDevice();
void CleanupDevice();
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR cmdLine, int cmdShow)
{
WNDCLASS winclass;
winclass.cbClsExtra = 0;
winclass.cbWndExtra = 0;
winclass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
winclass.hCursor = LoadCursor(NULL, IDC_ARROW);
winclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
winclass.hInstance = hInstance;
winclass.lpfnWndProc = winproc;
winclass.lpszClassName = L"winclass";
winclass.lpszMenuName = NULL;
winclass.style = CS_VREDRAW | CS_HREDRAW;
RegisterClass(&winclass);
RECT rc = { 0, 0, 640, 480 };
AdjustWindowRect(&rc, WS_OVERLAPPEDWINDOW, FALSE);
g_hWnd = CreateWindow(L"winclass", L"window",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
rc.right - rc.left,
rc.bottom - rc.top,
NULL, NULL, hInstance, NULL);
ShowWindow(g_hWnd, cmdShow);
MSG msg = { 0 };
while (msg.message != WM_QUIT)
{
if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
else
{
Render();
}
}
CleanupDevice();
return msg.wParam;
}
LRESULT CALLBACK winproc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
return DefWindowProc(hWnd, message, wParam, lParam);
}
HRESULT initDevice()
{
HRESULT hr = S_OK;
RECT rc;
GetClientRect(g_hWnd, &rc);
UINT width = rc.right - rc.left;
UINT height = rc.bottom - rc.top;
UINT createDeviceFlags = 0;
#ifdef _DEBUG
createDeviceFlags |= D3D11_CREATE_DEVICE_DEBUG;
#endif
D3D_DRIVER_TYPE driverTypes[] =
{
D3D_DRIVER_TYPE_HARDWARE,
D3D_DRIVER_TYPE_WARP,
D3D_DRIVER_TYPE_REFERENCE
};
UINT numDriverTypes = ARRAYSIZE(driverTypes);
D3D_FEATURE_LEVEL featureLevels[] =
{
D3D_FEATURE_LEVEL_11_1,
D3D_FEATURE_LEVEL_11_0,
D3D_FEATURE_LEVEL_10_1,
D3D_FEATURE_LEVEL_10_0
};
UINT numFeatureLevels = ARRAYSIZE(featureLevels);
DXGI_SWAP_CHAIN_DESC sd;
ZeroMemory(&sd, sizeof(sd));
sd.BufferCount = 1;
sd.BufferDesc.Width = width;
sd.BufferDesc.Height = height;
sd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
sd.BufferDesc.RefreshRate.Numerator = 60;
sd.BufferDesc.RefreshRate.Denominator = 1;
sd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
sd.OutputWindow = g_hWnd;
sd.SampleDesc.Count = 1;
sd.SampleDesc.Quality = 0;
sd.Windowed = TRUE;
for (UINT u = 0; u < numDriverTypes; u++)
{
g_driverType = driverTypes[u];
hr = D3D11CreateDeviceAndSwapChain
(
NULL,
g_driverType,
NULL,
createDeviceFlags,
featureLevels,
numFeatureLevels,
D3D11_SDK_VERSION,
&sd,
&g_pSwapChain,
&g_pd3dDevice,
&g_featureLevel,
&g_pImmediateContext
);
if (hr == E_INVALIDARG)
{
hr = D3D11CreateDeviceAndSwapChain
(
NULL,
g_driverType,
NULL,
createDeviceFlags,
&featureLevels[1],
numFeatureLevels-1,
D3D11_SDK_VERSION,
&sd,
&g_pSwapChain,
&g_pd3dDevice,
&g_featureLevel,
&g_pImmediateContext
);
}
if (SUCCEEDED(hr))
break;
}
if (FAILED(hr))
{
MessageBox(NULL, L"FAILED", L"FAILED", MB_OK);
return hr;
}
//create a render target view
ID3D11Texture2D* pBackBuffer = NULL;
hr = g_pSwapChain->GetBuffer(0, __uuidof(ID3D11Texture2D),
reinterpret_cast<void**>(&pBackBuffer));
if (FAILED(hr))
{
MessageBox(NULL, L"FAILED", L"FAILED", MB_OK);
return hr;
}
hr = g_pd3dDevice->CreateRenderTargetView(pBackBuffer, NULL, &g_pRenderTargetView);
pBackBuffer->Release();
if (FAILED(hr))
{
MessageBox(NULL, L"FAILED", L"FAILED", MB_OK);
return hr;
}
g_pImmediateContext->OMSetRenderTargets(1, &g_pRenderTargetView, NULL);
//setup the viwport
D3D11_VIEWPORT vp;
vp.Width = (FLOAT)width;
vp.Height = (FLOAT)height;
vp.MinDepth = 0.0f;
vp.MaxDepth = 1.0f;
vp.TopLeftX = 0;
vp.TopLeftY = 0;
g_pImmediateContext->RSSetViewports(1, &vp);
return S_OK;
}
void Render()
{
g_pImmediateContext->ClearRenderTargetView(g_pRenderTargetView, Colors::MidnightBlue);
g_pSwapChain->Present(0, 0);
}
void CleanupDevice()
{
if (g_pImmediateContext) g_pImmediateContext->Release();
if (g_pRenderTargetView) g_pRenderTargetView->Release();
if (g_pSwapChain) g_pSwapChain->Release();
if (g_pImmediateContext) g_pImmediateContext->Release();
if (g_pd3dDevice) g_pd3dDevice->Release();
}
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