Windows 分层窗口 桌面上透明 Direct3D

Windows 分层窗口 桌面上透明 Direct3D

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