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R67en

accessing pixels in LPDIRECTDRAWSURFACE7

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Im using VC++ 6.0 with DirectDraw 7.0. When my game is paused or the game is over, I would like to fade the screen to gray using 2 for loops to average each R, G, B component. 1)How do I access individual pixels? 2)Is the for loop method the best/ easiest way to do this? I am not especially concerned about performance, seeing as the game will be either over or paused. 3)Assuming I want to restore the original image before the game was paused, I intend to create a temporary LPDIRECTDRRAWSURFACE7 and blit the old image to it. Is there a better way to do so? here''s some relevant code: if (DirectDrawCreateEx(NULL, (void **)&lpdd, IID_IDirectDraw7, NULL)!=DD_OK) Error("DirectDrawCreate Fail"); // set cooperation level to windowed mode normal if (lpdd->SetCooperativeLevel(main_window_handle, DDSCL_ALLOWMODEX | DDSCL_FULLSCREEN | DDSCL_EXCLUSIVE | DDSCL_ALLOWREBOOT)!=DD_OK) Error("CooperativeLabel Fail"); // set the display mode if (lpdd->SetDisplayMode(SCREEN_WIDTH,SCREEN_HEIGHT,SCREEN_BPP,0,0)!=DD_OK) Error("SetDisplayMode Fail"); // Create the primary surface memset(&ddsd,0,sizeof(ddsd)); ddsd.dwSize = sizeof(ddsd); ddsd.dwFlags = DDSD_CAPS | DDSD_BACKBUFFERCOUNT; // we need to let dd know that we want a complex // flippable surface structure, set flags for that ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE | DDSCAPS_FLIP | DDSCAPS_COMPLEX; // set the backbuffer count to 1 ddsd.dwBackBufferCount = 1; // create the primary surface lpdd->CreateSurface(&ddsd,&lpddsprimary,NULL); // query for the backbuffer i.e the secondary surface ddscaps.dwCaps = DDSCAPS_BACKBUFFER; lpddsprimary->GetAttachedSurface(&ddscaps,&lpddsback);

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