FlipSurface V with SDL by crazylegs

ST_RESULT ST_SSPRITE::FlipV() {     if(_Shadowed == true) {         if(MainCanvas->LockSurf(_ShadowSurf) != ST_SUCCESS)             return ST_FAILURE;         Uint8 *pixelp = (Uint8* ) _ShadowSurf->pixels;         Uint8 *revp = (Uint8* ) _ShadowSurf->pixels;         Uint8 *buf = new Uint8[_ShadowSurf->pitch];         revp += (_ShadowSurf->pitch * (_ShadowSurf->h -1));                  for (int i = 0; i < _ShadowSurf->h / 2; i++) {             memcpy(buf, pixelp, _ShadowSurf->pitch);             memcpy(pixelp, revp, _ShadowSurf->pitch);             memcpy(revp, buf, _ShadowSurf->pitch);             pixelp += _ShadowSurf->pitch;             revp -= _ShadowSurf->pitch;         }         delete [] buf;                  MainCanvas->UnLockSurf(_ShadowSurf);     }     if(MainCanvas->LockSurf(_IMG) != ST_SUCCESS)         return ST_FAILURE;     Uint8 *pixelp = (Uint8* ) _IMG->pixels;     Uint8 *revp = (Uint8* ) _IMG->pixels;     Uint8 *buf = new Uint8[_IMG->pitch];     revp += (_IMG->pitch * (_IMG->h -1));          for (int i = 0; i < _IMG->h / 2; i++) {         memcpy(buf, pixelp, _IMG->pitch);         memcpy(pixelp, revp, _IMG->pitch);         memcpy(revp, buf, _IMG->pitch);         pixelp += _IMG->pitch;         revp -= _IMG->pitch;     }     delete [] buf;          MainCanvas->UnLockSurf(_IMG);      return ST_DONE; }