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Kasooi

some problems I'm getting...

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I''m getting this: C:\WINDOWS\TEMP\ccmKE8fb.o: In function `DD_Init(int, int, int)'': //C/windows/desktop/source/game/Gpdumb1.cpp:689: undefined reference to `DirectDrawCreate@12'' I get that when I compile my game thing. I''m using dev C++ and I got libddraw.a linked and a file called gpdumb1.cpp linked which this code is in:
int DD_Init(int width, int height, int bpp)
{
// this function initializes directdraw
int index; // looping variable
// create object and test for error
if (DirectDrawCreate(NULL,&lpdd,NULL)!=DD_OK)
   return(0);

// set cooperation level to windowed mode normal
if (lpdd->SetCooperativeLevel(main_window_handle,
           DDSCL_ALLOWMODEX | DDSCL_FULLSCREEN | 
           DDSCL_EXCLUSIVE | DDSCL_ALLOWREBOOT)!=DD_OK)
    return(0);

// set the display mode
if (lpdd->SetDisplayMode(width,height,bpp)!=DD_OK)
   return(0);

// set globals
screen_height = height;
screen_width = width;
screen_bpp = bpp;

// 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);

// create and attach palette

// create palette data
// clear all entries defensive programming
memset(palette,0,256*sizeof(PALETTEENTRY));

// create a R,G,B,GR gradient palette
for (index=0; index < 256; index++)
    {
    // set each entry
    if (index < 64) 
        palette[index].peRed = index*4; 
    else           // shades of green
    if (index >= 64 && index < 128) 
        palette[index].peGreen = (index-64)*4;
    else           // shades of blue
    if (index >= 128 && index < 192) 
       palette[index].peBlue = (index-128)*4;
    else           // shades of grey
    if (index >= 192 && index < 256) 
        palette[index].peRed = palette[index].peGreen = 
        palette[index].peBlue = (index-192)*4;
    
    // set flags
    palette[index].peFlags = PC_NOCOLLAPSE;
    } // end for index

// now create the palette object
if (lpdd->CreatePalette(DDPCAPS_8BIT | DDPCAPS_INITIALIZE | DDPCAPS_ALLOW256,
                         palette,&lpddpal,NULL)!=DD_OK)
   return(0);

// attach the palette to the primary
if (lpddsprimary->SetPalette(lpddpal)!=DD_OK)
   return(0);

// clear out both primary and secondary surfaces
DD_Fill_Surface(lpddsprimary,0);
DD_Fill_Surface(lpddsback,0);

// return success
return(1);
} // end DD_Init 
The error is here: if (DirectDrawCreate(NULL,&lpdd,NULL)!=DD_OK) return(0); I don''t know whats wrong. It works with other things.

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quote:
undefined reference to `DirectDrawCreate@12'


That error is saying that its not finding a declaration for "DirectDrawCreate". Make sure you have ddraw.lib included in your project.

[edited by - Noods on August 13, 2003 12:20:34 AM]

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quote:
Original post by Noods
quote:
undefined reference to `DirectDrawCreate@12''


That error is saying that its not finding a declaration for "DirectDrawCreate". Make sure you have ddraw.lib included in your project.

[edited by - Noods on August 13, 2003 12:20:34 AM]

To do that, would I use the #include <ddraw.lib> or would I use the linker. Because I used the linker one time and it came up as an illegal operation.

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quote:
Original post by Kasooi
quote:
Original post by Noods
quote:
undefined reference to `DirectDrawCreate@12''


That error is saying that its not finding a declaration for "DirectDrawCreate". Make sure you have ddraw.lib included in your project.

[edited by - Noods on August 13, 2003 12:20:34 AM]

To do that, would I use the #include <ddraw.lib> or would I use the linker. Because I used the linker one time and it came up as an illegal operation.




No, no! Put it in your linker settings, or in the source file, thus:

#pragma comment(lib, "ddraw.lib")

There is no semi-colon at the end ''cause it''s a preprocessor statement.

Beginners and experts will find answers here.

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that actually didn''t solve that problem. It solved another one though. But, I just moved that code block into the main file and it works perfectly fine.
Don''t really understand why it didn''t work in a seperate one...?

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