Run time errors deluxe!

Fredric · 2000-05-10T07:22:58

Using the following code, I'm getting a run time error.. basically what happens is: when I run the program, an 'illegal operation' and closes the window. I clicked debug, and the problem pointed to GameMain(), where the primary surface locks... but, I dont' see anything wrong with it! If you could take a look at my code and point me to what I'm doing wrong, that'd be great! NOTE: All the windows crap has been left out so I could save some space, and not take up a lot more room than the DirectX code already is. int GameInit() { if(FAILED(DirectDrawCreate(NULL,&lpdd,NULL))) { return 0; } if(FAILED(lpdd->SetCooperativeLevel(hwnd, DDSCL_FULLSCREEN / DDSCL_ALLOWMODEX / DDSCL_EXCLUSIVE / DDSCL_ALLOWREBOOT))) { return 0; } if(FAILED(lpdd->SetDisplayMode(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP))) { return 0; } //clear the surface descriptor and state it's size memset(&ddsd,0,sizeof(ddsd)); ddsd.dwSize = sizeof(ddsd); ddsd.dwFlags = DDSD_CAPS; ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE; //create the primary surface if(FAILED(lpdd->CreateSurface(&ddsd, &lpddprimary, NULL))) { return 0; } //1) build up the palette //2) Set 0 to black //3)... and 255 to white for(int color = 0; color<255; color++) { palette[color].peRed = rand()%256; palette[color].peGreen = rand()%256; palette[color].peBlue = rand()%256; palette[color].peFlags = PC_NOCOLLAPSE; } palette[0].peRed = 0; palette[0].peGreen = 0; palette[0].peBlue = 0; palette[0].peFlags = PC_NOCOLLAPSE; palette[255].peRed = 255; palette[255].peGreen = 255; palette[255].peBlue = 255; palette[255].peFlags = PC_NOCOLLAPSE; //create the palette if(FAILED(lpdd->CreatePalette(DDPCAPS_8BIT / DDPCAPS_ALLOW256 / DDPCAPS_INITIALIZE, palette, &lpddpalette,NULL))) { return 0; } //attach the palette to the primary surface if(FAILED(lpddprimary->SetPalette(lpddpalette))) { return 0; } return 1; } // end GameInit() int GameShutdown() { if(lpdd!=NULL) lpdd->Release(); lpdd = NULL; if(lpddpalette!=NULL) lpddpalette->Release(); lpddpalette = NULL; if(lpddprimary!=NULL) lpddprimary->Release(); lpddprimary = NULL; return 1; } int GameMain() { if (KEYDOWN(VK_ESCAPE)) SendMessage(hwnd, WM_DESTROY, wParam, lParam); memset(&ddsd,0,sizeof(ddsd)); ddsd.dwSize = sizeof(ddsd); if(FAILED(lpddprimary->Lock(NULL, &ddsd, DDLOCK_SURFACEMEMORYPTR / DDLOCK_WAIT, NULL))) { return 0; } int mempitch = (int)ddsd.lPitch; UCHAR *video_buffer = (UCHAR *)ddsd.lpSurface; for(int index=0; index<1000; index++) { UCHAR color = rand()%256; int x = rand()%SCREEN_WIDTH; int y = rand()%SCREEN_HEIGHT; video_buffer[x+y*mempitch] = color; } // unlock the surface if(FAILED(lpddprimary->Unlock(NULL))) { return 0; } Sleep(30); // 30 millisecond nap (hehe) return 1; } // end the game main PS- Remember that the OR's get converted into / because of the dumb boards... they should really find some sort of system that doesn't modify people's code! Edited by - Fredric on 5/7/00 7:09:57 PM

Graphics and GPU Programming Programming

Started by Fredric May 07, 2000 07:07 PM

9 comments, last by Fredric 23 years, 11 months ago

Sparkle

122

May 10, 2000 07:22 AM

The OutputDebugString function prints text in the debug window. Since nothing happened, I guess all your initialization went just fine.

Put calls to OutputDebugString before and after every statement (not inside the for loop, though) in GameMain, and then see what text got printed to the debug window before the program crashed. The last line of text will then hopefully direct you to the place in the code that caused the crash.

*Sparkle*

Run time errors deluxe!

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Run time errors deluxe!

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