BGRA与BGR的相互转换

 BGRA转BGR
 void BgraToBgr(BYTE *bgraData,int *bgraSize)
 {
     for(int i=,j=; j<*bgraSize; i+=,j+=)
     {
         *(bgraData+i) = *(bgraData+j);
         *(bgraData+i+) = *(bgraData+j+);
         *(bgraData+i+) = *(bgraData+j+);
     }
     *bgraSize = *bgraSize/*;
 }

 BGR转BGRA
 void BgrToBgra(BYTE **bgrData,int *bgrSize)
 {
     int bgraSize = *bgrSize/*;
     BYTE *bgraData = new BYTE[bgraSize];
     for(int i=, j=; j < bgraSize; i+=, j+=)
     {
         *(bgraData+j) = *(*bgrData+i);
         *(bgraData+j+) = *(*bgrData+i+);
         *(bgraData+j+) = *(*bgrData+i+);
         *(bgraData+j+) = ;
     }
     free(*bgrData);
     *bgrData = bgraData;
     *bgrSize = bgraSize;
 }