game_main(32)

int Game_Main(void *parms = NULL, int num_parms = 0)

{

//按ESC键退出

if (KEYDOWN(VK_ESCAPE))

SendMessage(main_window_handle,WM_CLOSE,0,0);

memset(&ddsd,0,sizeof(ddsd));

ddsd.dwSize=sizeof(ddsd);

//锁定主显示表面

if (FAILED(lpddsprimary->Lock(NULL, &ddsd,

DDLOCK_SURFACEMEMORYPTR | DDLOCK_WAIT,

NULL)))

return(0);

int lpitch32 = (int)(ddsd.lPitch >> 2);

UINT *video_buffer = (UINT *)ddsd.lpSurface;

for (int index=0; index < 1000; index++)

{

// select random position and color for 640x480x32

int red = rand()%256;

int green = rand()%256;

int blue = rand()%256;

int x = rand()%640;

int y = rand()%480;

UINT pixel = ((blue) + ((green) << 8) + ((red) << 16) + ((0) << 24));

//写色

video_buffer[x + y*lpitch32] = pixel;

} // end for index

//解锁主显示表面

if (FAILED(lpddsprimary->Unlock(NULL)))

return(0);

return(1);

} // end Game_Main