memcmp(ScreenBmp[tmpY],CardBmp[x],  card_line_length )

   HANDLE hBitMap = LoadImage(0, "img.bmp", IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
    
    BITMAP bitmap;
    GetObject(hBitMap,sizeof(BITMAP),&bitmap);
    int size = bitmap.bmHeight*bitmap.bmWidth*bitmap.bmBitsPixel/8;
   /// cout << bitmap.bmHeight << endl;
    BYTE *lpBits = new BYTE[ size ];
    
    GetBitmapBits((HBITMAP)hBitMap,size,lpBits );
    
    //delete []lpBits;
    
   HANDLE hBitMap2 = LoadImage(0, "img2.bmp", IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
    
    BITMAP bitmap2;
    GetObject(hBitMap2,sizeof(BITMAP),&bitmap2);
    int size2 = bitmap2.bmHeight*bitmap2.bmWidth*bitmap2.bmBitsPixel/8;
   /// cout << bitmap.bmHeight << endl;
    BYTE *lpBits2 = new BYTE[ size2 ];
    
    GetBitmapBits((HBITMAP)hBitMap2,size2,lpBits2 );

Quote:Original post by scheisskopf
i am trying to find an instance of a small bitmap in a screen grab of a window.

so far i have managed to load both bitmaps into two BYTE arrays. I found some code which searches through the bitmaps and uses memcmp to see if the smaller one is present in the larger. the trouble is, i am having trouble with the memcmp function:

memcmp(ScreenBmp[tmpY],CardBmp[x],  card_line_length )

What should ScreenBmp and CardBmp represent. I have the two bitmaps in BYTE buffer arrays, so how can i get them into the format above.

int main() {     HANDLE hBitMap = LoadImage(0, "img.bmp", IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);        BITMAP bitmap;    GetObject(hBitMap,sizeof(BITMAP),&bitmap);    int size = bitmap.bmHeight*bitmap.bmWidth*bitmap.bmBitsPixel/8;    BYTE *lpBits = new BYTE[ size ];        GetBitmapBits((HBITMAP)hBitMap,size,lpBits );           HANDLE hBitMap2 = LoadImage(0, "img2.bmp", IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);        BITMAP bitmap2;    GetObject(hBitMap2,sizeof(BITMAP),&bitmap2);    int size2 = bitmap2.bmHeight*bitmap2.bmWidth*bitmap2.bmBitsPixel/8;      BYTE *lpBits2 = new BYTE[ size2 ];        GetBitmapBits((HBITMAP)hBitMap2,size2,lpBits2 );            int ScreenWidth = bitmap2.bmWidth;    int ScreenHeight = bitmap2.bmHeight;    int numOfCard = 1;    int cardHeight = bitmap.bmHeight;    int card_line_length = bitmap.bmWidth;            for( int i = 0 ; i < ScreenWidth; i++ ) {         for( int j = 0 ; j < ScreenHeight; j++ ) {              for ( int k= 0; k < numOfCard; k++ ) {                  int tmpY = j;                  for ( int x = 0; x < cardHeight; x++ ) {                      if ( memcmp(lpBits2[tmpY],lpBits[x],  card_line_length ) != 0 )                           break; // we didnt find macth of a line                      tmpY++; // move to next line                  }                  if ( x == cardHeight) {                      cout << "found";                       }              }         }    }    system("PAUSE");    return 0;}

memcmp(lpBits2[tmpY],lpBits[x],  card_line_length )

Quote:Original post by scheisskopf
well i didn't want to post my complete code, but heregoes anyway (you can find the memcmp function at the bottom):

*** code ***

As you can see, i have changed it a little to

memcmp(lpBits2[tmpY],lpBits[x],  card_line_length )

i know how memcmp works, i am having trouble with getting the bitmaps bits

Quote:Original post by scheisskopf
i don't know what to put into memcpy. at present i have a buffer byte array, as i was instructed. but i do not know how to use this to see if the pixels are similar.

Quote:and your program may just work...

Quote:Original post by scheisskopf
i followed your advice, however i am still getting the same error:


invalid types `unsigned char[int]' for array subscript


this corresponds to my memcmp line!

i didn't even know that lpBits was multidimensional