PNG_SWAP_ALPHA   2331 3rdparty/libpng/pngrtran.c    if (png_ptr->transformations & PNG_SWAP_ALPHA)
PNG_SWAP_ALPHA    178 3rdparty/libpng/pngtrans.c    png_ptr->transformations |= PNG_SWAP_ALPHA;
PNG_SWAP_ALPHA     75 3rdparty/libpng/pngwtran.c    if (png_ptr->transformations & PNG_SWAP_ALPHA)