1 //桌面 透明 三角形 分层窗口 DX  2 //IDirect3DSurface9 GetDC  UpdateLayeredWindow  3   4 #include <Windows.h>  5 #include <mmsystem.h>  6 #include <d3dx9.h>  7 #pragma warning( disable : 4996 )   8 #include <strsafe.h>  9 #pragma warning( default : 4996 ) 10  11 //include path $(DXSDK_DIR)Include; 12 //library path $(DXSDK_DIR)Lib\x86 13 //library d3dx9.lib d3d9.lib Winmm.lib 14  15  16 LPDIRECT3D9             g_pD3D = NULL; 17 LPDIRECT3DDEVICE9       g_pd3dDevice = NULL; 18 LPDIRECT3DVERTEXBUFFER9 g_pVB = NULL; 19  20 HWND g_hWnd = NULL; 21 IDirect3DSurface9*        g_pkRenderTarget = NULL; 22 IDirect3DSurface9*        g_pkOffscreenPlainSurface = NULL; 23  24 struct CUSTOMVERTEX 25 { 26     FLOAT x, y, z; 27     DWORD color; 28 }; 29  30 #define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ|D3DFVF_DIFFUSE) 31  32 HRESULT InitD3D(HWND hWnd) 33 { 34     if (NULL == (g_pD3D = Direct3DCreate9(D3D_SDK_VERSION))) 35     { 36         return E_FAIL; 37     } 38  39     D3DPRESENT_PARAMETERS d3dpp; 40     ZeroMemory(&d3dpp, sizeof(d3dpp)); 41     d3dpp.Windowed = TRUE; 42     d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD; 43     d3dpp.BackBufferFormat = D3DFMT_UNKNOWN; 44  45     if (FAILED(g_pD3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd, D3DCREATE_SOFTWARE_VERTEXPROCESSING, &d3dpp, &g_pd3dDevice))) 46     { 47         return E_FAIL; 48     } 49  50     g_pd3dDevice->SetRenderState(D3DRS_CULLMODE, D3DCULL_NONE); 51     g_pd3dDevice->SetRenderState(D3DRS_LIGHTING, FALSE); 52  53     return S_OK; 54 } 55  56 HRESULT InitGeometry() 57 { 58     CUSTOMVERTEX g_Vertices[] = 59     { 60         { -1.0f, -1.0f, 0.0f, 0xffff0000, }, 61         { 1.0f, -1.0f, 0.0f, 0xff0000ff, }, 62         { 0.0f, 1.0f, 0.0f, 0xffffffff, }, 63     }; 64  65     if (FAILED(g_pd3dDevice->CreateVertexBuffer(3 * sizeof(CUSTOMVERTEX), 0, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &g_pVB, NULL))) 66     { 67         return E_FAIL; 68     } 69  70     VOID* pVertices; 71     if (FAILED(g_pVB->Lock(0, sizeof(g_Vertices), (void**)&pVertices, 0))) 72     { 73         return E_FAIL; 74     } 75     memcpy(pVertices, g_Vertices, sizeof(g_Vertices)); 76     g_pVB->Unlock(); 77  78     return S_OK; 79 } 80  81 VOID Cleanup() 82 { 83     if (g_pVB != NULL) 84     { 85         g_pVB->Release(); 86     } 87     if (g_pd3dDevice != NULL) 88     { 89         g_pd3dDevice->Release(); 90     } 91     if (g_pD3D != NULL) 92     { 93         g_pD3D->Release(); 94     } 95 } 96  97 VOID SetupMatrices() 98 { 99     D3DXMATRIXA16 matWorld;100     UINT iTime = timeGetTime() % 1000;101     FLOAT fAngle = iTime * (2.0f * D3DX_PI) / 1000.0f;102     D3DXMatrixRotationY(&matWorld, fAngle);103     g_pd3dDevice->SetTransform(D3DTS_WORLD, &matWorld);104 105     D3DXVECTOR3 vEyePt(0.0f, 3.0f, -5.0f);106     D3DXVECTOR3 vLookatPt(0.0f, 0.0f, 0.0f);107     D3DXVECTOR3 vUpVec(0.0f, 1.0f, 0.0f);108     D3DXMATRIXA16 matView;109     D3DXMatrixLookAtLH(&matView, &vEyePt, &vLookatPt, &vUpVec);110     g_pd3dDevice->SetTransform(D3DTS_VIEW, &matView);111 112     D3DXMATRIXA16 matProj;113     D3DXMatrixPerspectiveFovLH(&matProj, D3DX_PI / 4, 1.0f, 1.0f, 100.0f);114     g_pd3dDevice->SetTransform(D3DTS_PROJECTION, &matProj);115 116 }117 118 VOID Render()119 {120 121     RECT kRect;122     GetWindowRect(g_hWnd, &kRect);123 124     UINT uiWndWidth = kRect.right - kRect.left;125     UINT uiWndHeight = kRect.bottom - kRect.top;126 127     if (!g_pkOffscreenPlainSurface)128     {129         g_pd3dDevice->CreateOffscreenPlainSurface(uiWndWidth, uiWndHeight, D3DFMT_X8R8G8B8, D3DPOOL_SYSTEMMEM, &g_pkOffscreenPlainSurface, 0);130         g_pd3dDevice->CreateRenderTarget(uiWndWidth, uiWndHeight, D3DFMT_X8R8G8B8, D3DMULTISAMPLE_NONE, 0, true, &g_pkRenderTarget, 0);131     }132     else133     {134         D3DSURFACE_DESC kDesc;135         g_pkOffscreenPlainSurface->GetDesc(&kDesc);136 137         if (kDesc.Width != uiWndWidth || kDesc.Width != uiWndHeight)138         {139             g_pkOffscreenPlainSurface->Release();140             g_pkRenderTarget->Release();141             g_pd3dDevice->CreateOffscreenPlainSurface(uiWndWidth, uiWndHeight, D3DFMT_X8R8G8B8, D3DPOOL_SYSTEMMEM, &g_pkOffscreenPlainSurface, 0);142             g_pd3dDevice->CreateRenderTarget(uiWndWidth, uiWndHeight, D3DFMT_X8R8G8B8, D3DMULTISAMPLE_NONE, 0, true, &g_pkRenderTarget, 0);143         }144     }145 146     if (!g_pkOffscreenPlainSurface || !g_pkRenderTarget)147     {148         return;149     }150 151     HRESULT hr = g_pd3dDevice->SetRenderTarget(0, g_pkRenderTarget);152     g_pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0, 0, 0), 1.0f, 0);153 154     if (SUCCEEDED(g_pd3dDevice->BeginScene()))155     {156         SetupMatrices();157 158         g_pd3dDevice->SetStreamSource(0, g_pVB, 0, sizeof(CUSTOMVERTEX));159         g_pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX);160         g_pd3dDevice->DrawPrimitive(D3DPT_TRIANGLESTRIP, 0, 1);161 162         g_pd3dDevice->EndScene();163     }164 165     g_pd3dDevice->Present(NULL, NULL, NULL, NULL);166 167     hr = g_pd3dDevice->GetRenderTargetData(g_pkRenderTarget, g_pkOffscreenPlainSurface);168 169     HDC hDC = 0;170     //g_pkRenderTarget->GetDC(&hDC);171     g_pkOffscreenPlainSurface->GetDC(&hDC);172 173     POINT kPoint = { 0, 0 };174     SIZE kSize = { uiWndWidth, uiWndHeight };175 176     BLENDFUNCTION kBlend;177     kBlend.AlphaFormat = AC_SRC_ALPHA;178     kBlend.SourceConstantAlpha = 255;179     kBlend.BlendFlags = 0;180     kBlend.BlendOp = AC_SRC_OVER;181 182     UpdateLayeredWindow(g_hWnd, 0, &kPoint, &kSize, hDC, &kPoint, 0, &kBlend, ULW_ALPHA);183 184     g_pkOffscreenPlainSurface->ReleaseDC(hDC);185     //g_pkRenderTarget->ReleaseDC(hDC);186 }187 188 LRESULT WINAPI MsgProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)189 {190     switch (msg)191     {192     case WM_DESTROY:193         Cleanup();194         PostQuitMessage(0);195         return 0;196     }197 198     return DefWindowProc(hWnd, msg, wParam, lParam);199 }200 201 INT WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, INT)202 {203     UNREFERENCED_PARAMETER(hInst);204 205     WNDCLASSEX wc =206     {207         sizeof(WNDCLASSEX), CS_CLASSDC, MsgProc, 0L, 0L, GetModuleHandle(NULL), NULL, NULL, NULL, NULL, L"D3D Tutorial", NULL208     };209     RegisterClassEx(&wc);210 211     g_hWnd = CreateWindowEx(WS_EX_LAYERED, L"D3D Tutorial", L"D3D Tutorial 03: Matrices", WS_POPUP | WS_THICKFRAME, 100, 100, 512, 512, NULL, NULL, wc.hInstance, NULL);212 213     if (SUCCEEDED(InitD3D(g_hWnd)))214     {215         if (SUCCEEDED(InitGeometry()))216         {217             ShowWindow(g_hWnd, SW_SHOWDEFAULT);218             UpdateWindow(g_hWnd);219 220             MSG msg;221             ZeroMemory(&msg, sizeof(msg));222             while (msg.message != WM_QUIT)223             {224                 if (PeekMessage(&msg, NULL, 0U, 0U, PM_REMOVE))225                 {226                     TranslateMessage(&msg);227                     DispatchMessage(&msg);228                 }229                 else230                 {231                     Render();232                 }233             }234         }235     }236 237     UnregisterClass(L"D3D Tutorial", wc.hInstance);238     return 0;239 }