DirectDraw创建Windows窗口

KDDrawWindow.cpp
  1 #define STRICT
  2 #define WIN32_LEAN_AND_MEAN
  3 
  4 #include <windows.h>
  5 #include <assert.h>
  6 #include <tchar.h>
  7 #include <ddraw.h>
  8 
  9 #include "KWindow.h"
 10 #pragma comment(lib,"ddraw")
 11 
 12 const TCHAR szMessage[] = _T("Hello World!");
 13 const TCHAR szFace[] = _T("Times New Roman");
 14 const TCHAR szHint[] = _T("press ESC to quit.");
 15 const TCHAR szProgram[] = _T("HelloWorld4");
 16 
 17 class KDDrawWindow : public KWindow
 18 {
 19     LPDIRECTDRAW    lpdd;
 20     LPDIRECTDRAWSURFACE        lpddsprimary;
 21 
 22     void OnKeyDown(WPARAM wParam, LPARAM lParam)
 23     {
 24         if(wParam == VK_ESCAPE)
 25         {
 26             PostMessage(m_hWnd, WM_CLOSE, 0, 0);
 27         }
 28     }
 29 
 30     void Blend(int left, int right, int top, int bottom);
 31 
 32     void OnDraw(HDC hdc)
 33     {
 34         TextOut(hdc, 0, 0, szHint, lstrlen(szHint));
 35         CenterText(hdc, GetSystemMetrics(SM_CXSCREEN) / 2, 
 36                     GetSystemMetrics(SM_CYSCREEN) / 2, 
 37                     szFace, szMessage, 48);
 38         Blend(80, 560, 160, 250);
 39     }
 40 
 41 public:
 42     KDDrawWindow()
 43     {
 44         lpdd = NULL;
 45         lpddsprimary = NULL;
 46     }
 47 
 48     ~KDDrawWindow()
 49     {
 50         if(lpddsprimary)
 51         {
 52             lpddsprimary->Release();
 53             lpddsprimary = NULL;
 54         }
 55 
 56         if(lpdd)
 57         {
 58             lpdd->Release();
 59             lpdd = NULL;
 60         }
 61     }
 62 
 63     bool CreateSurface();
 64 };
 65 
 66 bool KDDrawWindow::CreateSurface()
 67 {
 68     HRESULT hr;
 69     hr = DirectDrawCreate(NULL, &lpdd, NULL);
 70     if(hr != DD_OK)
 71         return false;
 72 
 73     hr = lpdd->SetCooperativeLevel(m_hWnd, DDSCL_FULLSCREEN | DDSCL_EXCLUSIVE);
 74     if(hr != DD_OK)
 75         return false;
 76 
 77     hr = lpdd->SetDisplayMode(640, 480, 32);
 78     if(hr != DD_OK)
 79         return false;
 80 
 81     DDSURFACEDESC ddsd;
 82     memset(&ddsd, 0, sizeof(ddsd));
 83     ddsd.dwSize = sizeof(ddsd);
 84     ddsd.dwFlags = DDSD_CAPS;
 85     ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;
 86 
 87     return lpdd->CreateSurface(&ddsd, &lpddsprimary, NULL) == DD_OK;
 88 }
 89 
 90 void inline Blend(unsigned char* dest, unsigned char* src)
 91 {
 92     if(!dest || !src)
 93         return;
 94 
 95     dest[0] = (dest[0] + src[0]) / 2;
 96     dest[1] = (dest[1] + src[1]) / 2;
 97     dest[2] = (dest[2] + src[2]) / 2;
 98 }
 99 
100 void KDDrawWindow::Blend(int left, int right, int top, int bottom)
101 {
102     DDSURFACEDESC ddsd;
103     memset(&ddsd, 0, sizeof(ddsd));
104     ddsd.dwSize = sizeof(ddsd);
105 
106     HRESULT hr = lpddsprimary->Lock(NULL, &ddsd, DDLOCK_SURFACEMEMORYPTR | DDLOCK_WAIT, NULL);
107     assert(hr == DD_OK);
108 
109     unsigned char* screen = (unsigned char*)ddsd.lpSurface;
110 
111     for(int y = top; y < bottom; ++y)
112     {
113         unsigned char* pixel = screen + y * ddsd.lPitch + left * 4;
114         for(int x = left; x < right; ++x, pixel += 4)
115         {
116             if(pixel[0] != 255 || pixel[1] != 255 || pixel[2] != 255)
117             {
118                 ::Blend(pixel - 4, pixel);    //left
119                 ::Blend(pixel + 4, pixel);    //right
120                 ::Blend(pixel - ddsd.lPitch, pixel); //up
121                 ::Blend(pixel + ddsd.lPitch, pixel); //down
122             }
123         }
124     }
125 
126     lpddsprimary->Unlock(ddsd.lpSurface);
127 }
128 
129 int WINAPI WinMain( _In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPSTR lpCmdLine, _In_ int nShowCmd )
130 {
131     KDDrawWindow win;
132     win.CreateEx(0, szProgram, szProgram, WS_POPUP, GetSystemMetrics(SM_CXSCREEN) / 4, GetSystemMetrics(SM_CXSCREEN) / 4,
133         GetSystemMetrics(SM_CXSCREEN) / 2, GetSystemMetrics(SM_CYSCREEN) / 2,
134         NULL, NULL, hInstance);
135 
136     win.CreateSurface();
137     win.ShowWindow(nShowCmd);
138     win.UpdateWindow();
139     
140     return win.MessageLoop();
141 }